./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/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_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/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 64bit --witnessprinter.graph.data.programhash baad12004cda93802c22774fa87dd5ddbc51e76f7e3c81692100acfcfda43c3a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-24 01:00:08,296 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-24 01:00:08,408 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-64bit-Automizer_Default.epf [2024-11-24 01:00:08,417 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-24 01:00:08,417 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-24 01:00:08,460 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-24 01:00:08,461 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-24 01:00:08,461 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-24 01:00:08,462 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-24 01:00:08,462 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-24 01:00:08,463 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-24 01:00:08,463 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-24 01:00:08,464 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-24 01:00:08,464 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-24 01:00:08,464 INFO L153 SettingsManager]: * Use SBE=true [2024-11-24 01:00:08,465 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-24 01:00:08,465 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-24 01:00:08,465 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-24 01:00:08,465 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-24 01:00:08,465 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-24 01:00:08,465 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-24 01:00:08,465 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-24 01:00:08,465 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-24 01:00:08,465 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-24 01:00:08,466 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-24 01:00:08,466 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-24 01:00:08,466 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 01:00:08,466 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 01:00:08,466 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 01:00:08,466 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:00:08,467 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-24 01:00:08,467 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 01:00:08,467 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 01:00:08,467 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 01:00:08,468 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:00:08,468 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-24 01:00:08,468 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-24 01:00:08,468 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-24 01:00:08,468 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-24 01:00:08,468 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-24 01:00:08,468 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-24 01:00:08,468 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-24 01:00:08,468 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-24 01:00:08,469 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-24 01:00:08,469 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-24 01:00:08,469 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_f368beec-78ba-48e5-8b66-019da9ceeb05/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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> baad12004cda93802c22774fa87dd5ddbc51e76f7e3c81692100acfcfda43c3a [2024-11-24 01:00:08,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-24 01:00:08,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-24 01:00:08,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-24 01:00:08,817 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-24 01:00:08,817 INFO L274 PluginConnector]: CDTParser initialized [2024-11-24 01:00:08,819 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i [2024-11-24 01:00:11,906 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/data/f4a227e2e/2258be3fdb644d82ab2995458472147b/FLAGd778552f6 [2024-11-24 01:00:12,490 INFO L384 CDTParser]: Found 1 translation units. [2024-11-24 01:00:12,490 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i [2024-11-24 01:00:12,520 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/data/f4a227e2e/2258be3fdb644d82ab2995458472147b/FLAGd778552f6 [2024-11-24 01:00:12,979 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/data/f4a227e2e/2258be3fdb644d82ab2995458472147b [2024-11-24 01:00:12,982 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-24 01:00:12,984 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-24 01:00:12,986 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-24 01:00:12,987 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-24 01:00:12,992 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-24 01:00:12,993 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:00:12" (1/1) ... [2024-11-24 01:00:12,996 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@378f29c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:12, skipping insertion in model container [2024-11-24 01:00:12,997 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:00:12" (1/1) ... [2024-11-24 01:00:13,112 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-24 01:00:13,409 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_f368beec-78ba-48e5-8b66-019da9ceeb05/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4494,4507] [2024-11-24 01:00:13,420 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_f368beec-78ba-48e5-8b66-019da9ceeb05/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4554,4567] [2024-11-24 01:00:14,619 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:00:14,622 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:00:14,624 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:00:14,625 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:00:14,626 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:00:14,657 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:00:14,658 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:00:14,662 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:00:14,664 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:00:14,671 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:00:14,672 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:00:14,673 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:00:14,678 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:00:15,484 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_f368beec-78ba-48e5-8b66-019da9ceeb05/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[150650,150663] [2024-11-24 01:00:15,485 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 01:00:15,513 INFO L200 MainTranslator]: Completed pre-run [2024-11-24 01:00:15,528 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_f368beec-78ba-48e5-8b66-019da9ceeb05/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4494,4507] [2024-11-24 01:00:15,529 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_f368beec-78ba-48e5-8b66-019da9ceeb05/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4554,4567] [2024-11-24 01:00:15,655 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:00:15,656 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:00:15,656 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:00:15,657 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:00:15,658 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:00:15,670 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:00:15,670 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:00:15,672 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:00:15,673 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:00:15,674 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:00:15,675 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:00:15,676 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:00:15,676 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:00:15,883 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_f368beec-78ba-48e5-8b66-019da9ceeb05/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[150650,150663] [2024-11-24 01:00:15,884 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 01:00:16,074 INFO L204 MainTranslator]: Completed translation [2024-11-24 01:00:16,074 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:16 WrapperNode [2024-11-24 01:00:16,075 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-24 01:00:16,076 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-24 01:00:16,076 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-24 01:00:16,076 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-24 01:00:16,083 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:16" (1/1) ... [2024-11-24 01:00:16,163 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:16" (1/1) ... [2024-11-24 01:00:16,221 INFO L138 Inliner]: procedures = 668, calls = 1043, calls flagged for inlining = 51, calls inlined = 5, statements flattened = 133 [2024-11-24 01:00:16,221 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-24 01:00:16,224 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-24 01:00:16,224 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-24 01:00:16,224 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-24 01:00:16,237 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:16" (1/1) ... [2024-11-24 01:00:16,237 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:16" (1/1) ... [2024-11-24 01:00:16,244 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:16" (1/1) ... [2024-11-24 01:00:16,284 INFO L175 MemorySlicer]: Split 27 memory accesses to 3 slices as follows [2, 5, 20]. 74 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 6 writes are split as follows [0, 0, 6]. [2024-11-24 01:00:16,284 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:16" (1/1) ... [2024-11-24 01:00:16,285 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:16" (1/1) ... [2024-11-24 01:00:16,301 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:16" (1/1) ... [2024-11-24 01:00:16,302 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:16" (1/1) ... [2024-11-24 01:00:16,307 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:16" (1/1) ... [2024-11-24 01:00:16,311 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:16" (1/1) ... [2024-11-24 01:00:16,313 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:16" (1/1) ... [2024-11-24 01:00:16,318 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-24 01:00:16,319 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-24 01:00:16,320 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-24 01:00:16,320 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-24 01:00:16,321 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:16" (1/1) ... [2024-11-24 01:00:16,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:00:16,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:00:16,384 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-24 01:00:16,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-24 01:00:16,426 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_back [2024-11-24 01:00:16,426 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_back [2024-11-24 01:00:16,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-24 01:00:16,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-24 01:00:16,427 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-24 01:00:16,427 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2024-11-24 01:00:16,427 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2024-11-24 01:00:16,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-24 01:00:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2024-11-24 01:00:16,428 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2024-11-24 01:00:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-24 01:00:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-24 01:00:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-24 01:00:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-24 01:00:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-24 01:00:16,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-24 01:00:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2024-11-24 01:00:16,428 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2024-11-24 01:00:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-24 01:00:16,428 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-24 01:00:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-24 01:00:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-24 01:00:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-24 01:00:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-24 01:00:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-24 01:00:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-24 01:00:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-24 01:00:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2024-11-24 01:00:16,429 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2024-11-24 01:00:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2024-11-24 01:00:16,429 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2024-11-24 01:00:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-24 01:00:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-24 01:00:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-24 01:00:16,743 INFO L234 CfgBuilder]: Building ICFG [2024-11-24 01:00:16,746 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-24 01:00:17,198 INFO L? ?]: Removed 61 outVars from TransFormulas that were not future-live. [2024-11-24 01:00:17,198 INFO L283 CfgBuilder]: Performing block encoding [2024-11-24 01:00:17,219 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-24 01:00:17,220 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-24 01:00:17,222 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:00:17 BoogieIcfgContainer [2024-11-24 01:00:17,222 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-24 01:00:17,225 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-24 01:00:17,226 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-24 01:00:17,233 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-24 01:00:17,234 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 01:00:12" (1/3) ... [2024-11-24 01:00:17,236 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19d18396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:00:17, skipping insertion in model container [2024-11-24 01:00:17,236 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:16" (2/3) ... [2024-11-24 01:00:17,237 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19d18396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:00:17, skipping insertion in model container [2024-11-24 01:00:17,237 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:00:17" (3/3) ... [2024-11-24 01:00:17,240 INFO L128 eAbstractionObserver]: Analyzing ICFG aws_linked_list_back_harness.i [2024-11-24 01:00:17,266 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-24 01:00:17,268 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG aws_linked_list_back_harness.i that has 9 procedures, 98 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-24 01:00:17,362 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-24 01:00:17,380 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;@2e6de6d8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-24 01:00:17,380 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-24 01:00:17,388 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 64 states have (on average 1.296875) internal successors, (83), 65 states have internal predecessors, (83), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-24 01:00:17,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-24 01:00:17,402 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:00:17,403 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:00:17,404 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:00:17,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:00:17,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1690245469, now seen corresponding path program 1 times [2024-11-24 01:00:17,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:00:17,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839309854] [2024-11-24 01:00:17,422 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:00:17,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:00:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:00:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-24 01:00:18,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:00:18,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839309854] [2024-11-24 01:00:18,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839309854] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:00:18,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325603337] [2024-11-24 01:00:18,073 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:00:18,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:00:18,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:00:18,078 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:00:18,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-24 01:00:18,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:00:18,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-24 01:00:18,483 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:00:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-24 01:00:18,516 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:00:18,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325603337] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:00:18,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-24 01:00:18,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-24 01:00:18,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658289405] [2024-11-24 01:00:18,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:00:18,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-24 01:00:18,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:00:18,555 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-24 01:00:18,556 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-24 01:00:18,559 INFO L87 Difference]: Start difference. First operand has 98 states, 64 states have (on average 1.296875) internal successors, (83), 65 states have internal predecessors, (83), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-24 01:00:18,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:00:18,628 INFO L93 Difference]: Finished difference Result 188 states and 271 transitions. [2024-11-24 01:00:18,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-24 01:00:18,632 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 84 [2024-11-24 01:00:18,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:00:18,641 INFO L225 Difference]: With dead ends: 188 [2024-11-24 01:00:18,641 INFO L226 Difference]: Without dead ends: 93 [2024-11-24 01:00:18,648 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-24 01:00:18,654 INFO L435 NwaCegarLoop]: 127 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 01:00:18,655 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 01:00:18,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-24 01:00:18,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2024-11-24 01:00:18,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.25) internal successors, (75), 61 states have internal predecessors, (75), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-24 01:00:18,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2024-11-24 01:00:18,716 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 84 [2024-11-24 01:00:18,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:00:18,717 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2024-11-24 01:00:18,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-24 01:00:18,718 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2024-11-24 01:00:18,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-24 01:00:18,722 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:00:18,722 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:00:18,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-24 01:00:18,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-24 01:00:18,924 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:00:18,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:00:18,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1691347493, now seen corresponding path program 1 times [2024-11-24 01:00:18,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:00:18,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693814647] [2024-11-24 01:00:18,926 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:00:18,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:00:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:00:20,327 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-11-24 01:00:20,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:00:20,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693814647] [2024-11-24 01:00:20,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693814647] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:00:20,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883486171] [2024-11-24 01:00:20,330 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:00:20,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:00:20,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:00:20,333 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:00:20,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-24 01:00:20,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:00:20,634 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-24 01:00:20,645 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:00:20,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2024-11-24 01:00:20,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2024-11-24 01:00:21,657 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-24 01:00:21,657 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 15 treesize of output 7 [2024-11-24 01:00:21,674 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-24 01:00:21,674 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 19 treesize of output 11 [2024-11-24 01:00:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 48 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-24 01:00:21,766 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:00:22,942 INFO L349 Elim1Store]: treesize reduction 15, result has 64.3 percent of original size [2024-11-24 01:00:22,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 174 treesize of output 160 [2024-11-24 01:00:22,981 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 01:00:22,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 81 [2024-11-24 01:00:23,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2024-11-24 01:00:23,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-11-24 01:00:23,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-24 01:00:23,209 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 01:00:23,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2024-11-24 01:00:23,280 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 01:00:23,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 71 [2024-11-24 01:00:23,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 01:00:23,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 01:00:23,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 01:00:23,382 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-24 01:00:23,654 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-24 01:00:23,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883486171] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:00:23,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:00:23,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 17] total 29 [2024-11-24 01:00:23,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668449992] [2024-11-24 01:00:23,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:00:23,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-24 01:00:23,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:00:23,662 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-24 01:00:23,663 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2024-11-24 01:00:23,664 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 29 states, 25 states have (on average 3.56) internal successors, (89), 24 states have internal predecessors, (89), 14 states have call successors, (35), 5 states have call predecessors, (35), 9 states have return successors, (30), 12 states have call predecessors, (30), 13 states have call successors, (30) [2024-11-24 01:00:27,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 01:00:32,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 01:00:36,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 01:00:40,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 01:00:41,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:00:41,830 INFO L93 Difference]: Finished difference Result 191 states and 251 transitions. [2024-11-24 01:00:41,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-24 01:00:41,831 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 3.56) internal successors, (89), 24 states have internal predecessors, (89), 14 states have call successors, (35), 5 states have call predecessors, (35), 9 states have return successors, (30), 12 states have call predecessors, (30), 13 states have call successors, (30) Word has length 84 [2024-11-24 01:00:41,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:00:41,836 INFO L225 Difference]: With dead ends: 191 [2024-11-24 01:00:41,837 INFO L226 Difference]: Without dead ends: 97 [2024-11-24 01:00:41,840 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=208, Invalid=1954, Unknown=0, NotChecked=0, Total=2162 [2024-11-24 01:00:41,842 INFO L435 NwaCegarLoop]: 107 mSDtfsCounter, 133 mSDsluCounter, 1529 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 20 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1636 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.9s IncrementalHoareTripleChecker+Time [2024-11-24 01:00:41,843 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 1636 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 365 Invalid, 4 Unknown, 0 Unchecked, 16.9s Time] [2024-11-24 01:00:41,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-24 01:00:41,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2024-11-24 01:00:41,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 64 states have internal predecessors, (77), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2024-11-24 01:00:41,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 126 transitions. [2024-11-24 01:00:41,862 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 126 transitions. Word has length 84 [2024-11-24 01:00:41,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:00:41,862 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 126 transitions. [2024-11-24 01:00:41,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 3.56) internal successors, (89), 24 states have internal predecessors, (89), 14 states have call successors, (35), 5 states have call predecessors, (35), 9 states have return successors, (30), 12 states have call predecessors, (30), 13 states have call successors, (30) [2024-11-24 01:00:41,863 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 126 transitions. [2024-11-24 01:00:41,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-24 01:00:41,864 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:00:41,865 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:00:41,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-24 01:00:42,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:00:42,066 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:00:42,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:00:42,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1511072653, now seen corresponding path program 1 times [2024-11-24 01:00:42,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:00:42,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191855638] [2024-11-24 01:00:42,068 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:00:42,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:00:42,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:00:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-11-24 01:00:42,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:00:42,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191855638] [2024-11-24 01:00:42,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191855638] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:00:42,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304742889] [2024-11-24 01:00:42,661 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:00:42,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:00:42,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:00:42,664 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:00:42,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-24 01:00:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:00:42,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-24 01:00:42,931 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:00:43,151 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:00:43,151 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:00:43,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304742889] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:00:43,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-24 01:00:43,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2024-11-24 01:00:43,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59299512] [2024-11-24 01:00:43,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:00:43,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-24 01:00:43,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:00:43,153 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-24 01:00:43,153 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2024-11-24 01:00:43,154 INFO L87 Difference]: Start difference. First operand 96 states and 126 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-24 01:00:43,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:00:43,672 INFO L93 Difference]: Finished difference Result 177 states and 234 transitions. [2024-11-24 01:00:43,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 01:00:43,672 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 88 [2024-11-24 01:00:43,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:00:43,674 INFO L225 Difference]: With dead ends: 177 [2024-11-24 01:00:43,675 INFO L226 Difference]: Without dead ends: 98 [2024-11-24 01:00:43,676 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2024-11-24 01:00:43,677 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 132 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-24 01:00:43,678 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 566 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-24 01:00:43,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-24 01:00:43,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2024-11-24 01:00:43,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 64 states have internal predecessors, (76), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2024-11-24 01:00:43,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 125 transitions. [2024-11-24 01:00:43,695 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 125 transitions. Word has length 88 [2024-11-24 01:00:43,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:00:43,696 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 125 transitions. [2024-11-24 01:00:43,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-24 01:00:43,697 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 125 transitions. [2024-11-24 01:00:43,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-24 01:00:43,698 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:00:43,699 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:00:43,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-24 01:00:43,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:00:43,900 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:00:43,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:00:43,900 INFO L85 PathProgramCache]: Analyzing trace with hash 810983713, now seen corresponding path program 1 times [2024-11-24 01:00:43,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:00:43,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628746522] [2024-11-24 01:00:43,901 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:00:43,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:00:43,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:00:44,453 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-11-24 01:00:44,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:00:44,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628746522] [2024-11-24 01:00:44,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628746522] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:00:44,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076900621] [2024-11-24 01:00:44,454 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:00:44,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:00:44,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:00:44,457 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:00:44,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-24 01:00:44,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:00:44,730 INFO L256 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-24 01:00:44,734 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:00:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:00:45,005 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:00:45,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076900621] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:00:45,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-24 01:00:45,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 17 [2024-11-24 01:00:45,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275579153] [2024-11-24 01:00:45,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:00:45,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-24 01:00:45,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:00:45,008 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-24 01:00:45,008 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2024-11-24 01:00:45,008 INFO L87 Difference]: Start difference. First operand 96 states and 125 transitions. Second operand has 10 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-24 01:00:45,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:00:45,655 INFO L93 Difference]: Finished difference Result 183 states and 242 transitions. [2024-11-24 01:00:45,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-24 01:00:45,656 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 90 [2024-11-24 01:00:45,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:00:45,658 INFO L225 Difference]: With dead ends: 183 [2024-11-24 01:00:45,659 INFO L226 Difference]: Without dead ends: 103 [2024-11-24 01:00:45,660 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2024-11-24 01:00:45,661 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 146 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-24 01:00:45,662 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 630 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-24 01:00:45,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-24 01:00:45,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 97. [2024-11-24 01:00:45,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 65 states have internal predecessors, (77), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2024-11-24 01:00:45,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions. [2024-11-24 01:00:45,694 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 90 [2024-11-24 01:00:45,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:00:45,694 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 126 transitions. [2024-11-24 01:00:45,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-24 01:00:45,696 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions. [2024-11-24 01:00:45,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-24 01:00:45,698 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:00:45,698 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:00:45,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-24 01:00:45,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:00:45,899 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:00:45,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:00:45,900 INFO L85 PathProgramCache]: Analyzing trace with hash 240834731, now seen corresponding path program 1 times [2024-11-24 01:00:45,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:00:45,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563728117] [2024-11-24 01:00:45,900 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:00:45,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:00:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:00:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-11-24 01:00:46,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:00:46,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563728117] [2024-11-24 01:00:46,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563728117] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:00:46,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151142434] [2024-11-24 01:00:46,584 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:00:46,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:00:46,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:00:46,588 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:00:46,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-24 01:00:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:00:46,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-24 01:00:46,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:00:46,900 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-24 01:00:46,901 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:00:46,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151142434] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:00:46,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-24 01:00:46,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2024-11-24 01:00:46,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791656935] [2024-11-24 01:00:46,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:00:46,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 01:00:46,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:00:46,903 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 01:00:46,904 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-24 01:00:46,904 INFO L87 Difference]: Start difference. First operand 97 states and 126 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-11-24 01:00:46,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:00:46,942 INFO L93 Difference]: Finished difference Result 178 states and 237 transitions. [2024-11-24 01:00:46,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 01:00:46,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 91 [2024-11-24 01:00:46,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:00:46,949 INFO L225 Difference]: With dead ends: 178 [2024-11-24 01:00:46,950 INFO L226 Difference]: Without dead ends: 101 [2024-11-24 01:00:46,950 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-24 01:00:46,951 INFO L435 NwaCegarLoop]: 118 mSDtfsCounter, 2 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 01:00:46,951 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 231 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 01:00:46,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-24 01:00:46,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2024-11-24 01:00:46,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 64 states have (on average 1.21875) internal successors, (78), 66 states have internal predecessors, (78), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2024-11-24 01:00:46,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 127 transitions. [2024-11-24 01:00:46,999 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 127 transitions. Word has length 91 [2024-11-24 01:00:47,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:00:47,000 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 127 transitions. [2024-11-24 01:00:47,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-11-24 01:00:47,001 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 127 transitions. [2024-11-24 01:00:47,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-24 01:00:47,004 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:00:47,004 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:00:47,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-24 01:00:47,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:00:47,206 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:00:47,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:00:47,207 INFO L85 PathProgramCache]: Analyzing trace with hash 694343469, now seen corresponding path program 1 times [2024-11-24 01:00:47,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:00:47,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857607399] [2024-11-24 01:00:47,207 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:00:47,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:00:47,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:00:48,144 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-24 01:00:48,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:00:48,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857607399] [2024-11-24 01:00:48,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857607399] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:00:48,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058539464] [2024-11-24 01:00:48,145 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:00:48,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:00:48,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:00:48,148 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:00:48,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-24 01:00:48,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:00:48,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-24 01:00:48,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:00:48,774 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-24 01:00:48,778 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:00:48,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058539464] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:00:48,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-24 01:00:48,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [7] total 15 [2024-11-24 01:00:48,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229512258] [2024-11-24 01:00:48,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:00:48,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-24 01:00:48,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:00:48,780 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-24 01:00:48,780 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2024-11-24 01:00:48,780 INFO L87 Difference]: Start difference. First operand 98 states and 127 transitions. Second operand has 13 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 5 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2024-11-24 01:00:49,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:00:49,519 INFO L93 Difference]: Finished difference Result 179 states and 234 transitions. [2024-11-24 01:00:49,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-24 01:00:49,521 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 5 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 99 [2024-11-24 01:00:49,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:00:49,522 INFO L225 Difference]: With dead ends: 179 [2024-11-24 01:00:49,523 INFO L226 Difference]: Without dead ends: 101 [2024-11-24 01:00:49,525 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2024-11-24 01:00:49,525 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 108 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-24 01:00:49,527 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 948 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-24 01:00:49,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-24 01:00:49,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2024-11-24 01:00:49,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 67 states have internal predecessors, (79), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2024-11-24 01:00:49,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 128 transitions. [2024-11-24 01:00:49,555 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 128 transitions. Word has length 99 [2024-11-24 01:00:49,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:00:49,555 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 128 transitions. [2024-11-24 01:00:49,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 5 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2024-11-24 01:00:49,555 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 128 transitions. [2024-11-24 01:00:49,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-24 01:00:49,557 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:00:49,561 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:00:49,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-24 01:00:49,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:00:49,762 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:00:49,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:00:49,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1497967269, now seen corresponding path program 1 times [2024-11-24 01:00:49,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:00:49,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9775617] [2024-11-24 01:00:49,763 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:00:49,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:00:49,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:00:50,603 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-11-24 01:00:50,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:00:50,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9775617] [2024-11-24 01:00:50,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9775617] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:00:50,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821157006] [2024-11-24 01:00:50,606 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:00:50,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:00:50,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:00:50,612 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:00:50,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-24 01:00:50,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:00:50,922 INFO L256 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-24 01:00:50,930 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:00:51,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 01:00:51,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 01:00:52,741 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 43 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:00:52,741 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:00:53,965 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-11-24 01:00:53,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821157006] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:00:53,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:00:53,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 17, 12] total 32 [2024-11-24 01:00:53,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594805111] [2024-11-24 01:00:53,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:00:53,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-24 01:00:53,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:00:53,969 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-24 01:00:53,970 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2024-11-24 01:00:53,971 INFO L87 Difference]: Start difference. First operand 99 states and 128 transitions. Second operand has 32 states, 31 states have (on average 4.096774193548387) internal successors, (127), 31 states have internal predecessors, (127), 11 states have call successors, (30), 4 states have call predecessors, (30), 6 states have return successors, (28), 10 states have call predecessors, (28), 11 states have call successors, (28) [2024-11-24 01:00:58,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:00:58,803 INFO L93 Difference]: Finished difference Result 343 states and 466 transitions. [2024-11-24 01:00:58,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-24 01:00:58,804 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.096774193548387) internal successors, (127), 31 states have internal predecessors, (127), 11 states have call successors, (30), 4 states have call predecessors, (30), 6 states have return successors, (28), 10 states have call predecessors, (28), 11 states have call successors, (28) Word has length 101 [2024-11-24 01:00:58,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:00:58,807 INFO L225 Difference]: With dead ends: 343 [2024-11-24 01:00:58,807 INFO L226 Difference]: Without dead ends: 264 [2024-11-24 01:00:58,809 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 182 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=481, Invalid=3551, Unknown=0, NotChecked=0, Total=4032 [2024-11-24 01:00:58,810 INFO L435 NwaCegarLoop]: 131 mSDtfsCounter, 435 mSDsluCounter, 1741 mSDsCounter, 0 mSdLazyCounter, 1666 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 1872 SdHoareTripleChecker+Invalid, 1820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-24 01:00:58,811 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 1872 Invalid, 1820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1666 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-24 01:00:58,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-11-24 01:00:58,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 226. [2024-11-24 01:00:58,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 160 states have (on average 1.28125) internal successors, (205), 163 states have internal predecessors, (205), 47 states have call successors, (47), 15 states have call predecessors, (47), 18 states have return successors, (52), 47 states have call predecessors, (52), 45 states have call successors, (52) [2024-11-24 01:00:58,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 304 transitions. [2024-11-24 01:00:58,864 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 304 transitions. Word has length 101 [2024-11-24 01:00:58,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:00:58,864 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 304 transitions. [2024-11-24 01:00:58,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.096774193548387) internal successors, (127), 31 states have internal predecessors, (127), 11 states have call successors, (30), 4 states have call predecessors, (30), 6 states have return successors, (28), 10 states have call predecessors, (28), 11 states have call successors, (28) [2024-11-24 01:00:58,865 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 304 transitions. [2024-11-24 01:00:58,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-24 01:00:58,870 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:00:58,871 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:00:58,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-24 01:00:59,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:00:59,076 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:00:59,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:00:59,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1677798321, now seen corresponding path program 1 times [2024-11-24 01:00:59,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:00:59,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951132040] [2024-11-24 01:00:59,076 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:00:59,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:00:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:01:00,979 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-11-24 01:01:00,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:01:00,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951132040] [2024-11-24 01:01:00,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951132040] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:01:00,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018407402] [2024-11-24 01:01:00,984 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:01:00,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:01:00,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:01:00,987 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:01:00,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-24 01:01:01,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:01:01,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-24 01:01:01,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:01:01,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-24 01:01:01,623 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-24 01:01:01,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2024-11-24 01:01:01,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2024-11-24 01:01:01,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-24 01:01:01,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 01:01:01,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 23 [2024-11-24 01:01:01,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 11 [2024-11-24 01:01:02,724 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 52 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-24 01:01:02,724 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:01:13,084 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 01:01:13,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2024-11-24 01:01:13,131 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 01:01:13,132 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 343 treesize of output 349 [2024-11-24 01:01:13,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 176 [2024-11-24 01:01:13,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-11-24 01:01:13,381 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 01:01:13,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 89 treesize of output 89 [2024-11-24 01:01:13,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-11-24 01:01:13,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2024-11-24 01:01:13,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2024-11-24 01:01:14,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018407402] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:01:14,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:01:14,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2024-11-24 01:01:14,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576222292] [2024-11-24 01:01:14,270 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:01:14,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-24 01:01:14,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:01:14,272 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-24 01:01:14,273 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1142, Unknown=7, NotChecked=0, Total=1260 [2024-11-24 01:01:14,273 INFO L87 Difference]: Start difference. First operand 226 states and 304 transitions. Second operand has 25 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 10 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (23), 8 states have call predecessors, (23), 10 states have call successors, (23) [2024-11-24 01:01:18,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:01:18,077 INFO L93 Difference]: Finished difference Result 447 states and 602 transitions. [2024-11-24 01:01:18,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-24 01:01:18,078 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 10 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (23), 8 states have call predecessors, (23), 10 states have call successors, (23) Word has length 102 [2024-11-24 01:01:18,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:01:18,081 INFO L225 Difference]: With dead ends: 447 [2024-11-24 01:01:18,082 INFO L226 Difference]: Without dead ends: 252 [2024-11-24 01:01:18,084 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 170 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=210, Invalid=1853, Unknown=7, NotChecked=0, Total=2070 [2024-11-24 01:01:18,085 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 166 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 1427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-24 01:01:18,085 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 1223 Invalid, 1427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1287 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-24 01:01:18,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-11-24 01:01:18,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 232. [2024-11-24 01:01:18,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 165 states have (on average 1.2727272727272727) internal successors, (210), 168 states have internal predecessors, (210), 47 states have call successors, (47), 16 states have call predecessors, (47), 19 states have return successors, (52), 47 states have call predecessors, (52), 45 states have call successors, (52) [2024-11-24 01:01:18,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 309 transitions. [2024-11-24 01:01:18,132 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 309 transitions. Word has length 102 [2024-11-24 01:01:18,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:01:18,133 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 309 transitions. [2024-11-24 01:01:18,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 10 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (23), 8 states have call predecessors, (23), 10 states have call successors, (23) [2024-11-24 01:01:18,134 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 309 transitions. [2024-11-24 01:01:18,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-24 01:01:18,135 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:01:18,135 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:01:18,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-24 01:01:18,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:01:18,339 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:01:18,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:01:18,340 INFO L85 PathProgramCache]: Analyzing trace with hash 721772827, now seen corresponding path program 1 times [2024-11-24 01:01:18,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:01:18,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772136363] [2024-11-24 01:01:18,340 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:01:18,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:01:18,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:01:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2024-11-24 01:01:18,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:01:18,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772136363] [2024-11-24 01:01:18,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772136363] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:01:18,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593281176] [2024-11-24 01:01:18,503 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:01:18,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:01:18,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:01:18,506 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:01:18,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-24 01:01:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:01:18,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-24 01:01:18,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:01:18,839 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-24 01:01:18,839 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:01:18,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593281176] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:01:18,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-24 01:01:18,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2024-11-24 01:01:18,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916633804] [2024-11-24 01:01:18,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:01:18,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:01:18,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:01:18,843 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:01:18,843 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:01:18,844 INFO L87 Difference]: Start difference. First operand 232 states and 309 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-24 01:01:18,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:01:18,926 INFO L93 Difference]: Finished difference Result 442 states and 602 transitions. [2024-11-24 01:01:18,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:01:18,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 101 [2024-11-24 01:01:18,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:01:18,930 INFO L225 Difference]: With dead ends: 442 [2024-11-24 01:01:18,930 INFO L226 Difference]: Without dead ends: 234 [2024-11-24 01:01:18,931 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:01:18,933 INFO L435 NwaCegarLoop]: 121 mSDtfsCounter, 0 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 01:01:18,934 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 351 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 01:01:18,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2024-11-24 01:01:19,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2024-11-24 01:01:19,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 165 states have (on average 1.2545454545454546) internal successors, (207), 168 states have internal predecessors, (207), 47 states have call successors, (47), 16 states have call predecessors, (47), 19 states have return successors, (52), 47 states have call predecessors, (52), 45 states have call successors, (52) [2024-11-24 01:01:19,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 306 transitions. [2024-11-24 01:01:19,007 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 306 transitions. Word has length 101 [2024-11-24 01:01:19,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:01:19,007 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 306 transitions. [2024-11-24 01:01:19,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-24 01:01:19,008 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 306 transitions. [2024-11-24 01:01:19,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-24 01:01:19,010 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:01:19,011 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:01:19,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-24 01:01:19,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:01:19,212 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:01:19,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:01:19,213 INFO L85 PathProgramCache]: Analyzing trace with hash 889445595, now seen corresponding path program 1 times [2024-11-24 01:01:19,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:01:19,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852675693] [2024-11-24 01:01:19,213 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:01:19,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:01:19,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:01:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-11-24 01:01:19,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:01:19,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852675693] [2024-11-24 01:01:19,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852675693] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:01:19,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815410122] [2024-11-24 01:01:19,358 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:01:19,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:01:19,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:01:19,361 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:01:19,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-24 01:01:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:01:19,686 INFO L256 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-24 01:01:19,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:01:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-24 01:01:19,703 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:01:19,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815410122] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:01:19,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-24 01:01:19,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2024-11-24 01:01:19,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275229523] [2024-11-24 01:01:19,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:01:19,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:01:19,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:01:19,705 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:01:19,705 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:01:19,705 INFO L87 Difference]: Start difference. First operand 232 states and 306 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-24 01:01:19,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:01:19,764 INFO L93 Difference]: Finished difference Result 323 states and 434 transitions. [2024-11-24 01:01:19,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:01:19,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 101 [2024-11-24 01:01:19,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:01:19,767 INFO L225 Difference]: With dead ends: 323 [2024-11-24 01:01:19,767 INFO L226 Difference]: Without dead ends: 115 [2024-11-24 01:01:19,768 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:01:19,770 INFO L435 NwaCegarLoop]: 121 mSDtfsCounter, 0 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 01:01:19,770 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 352 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 01:01:19,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-24 01:01:19,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2024-11-24 01:01:19,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 78 states have internal predecessors, (91), 25 states have call successors, (25), 9 states have call predecessors, (25), 10 states have return successors, (26), 24 states have call predecessors, (26), 24 states have call successors, (26) [2024-11-24 01:01:19,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 142 transitions. [2024-11-24 01:01:19,794 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 142 transitions. Word has length 101 [2024-11-24 01:01:19,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:01:19,797 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 142 transitions. [2024-11-24 01:01:19,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-24 01:01:19,797 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 142 transitions. [2024-11-24 01:01:19,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-24 01:01:19,799 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:01:19,800 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:01:19,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-24 01:01:20,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-24 01:01:20,001 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:01:20,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:01:20,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1210947809, now seen corresponding path program 2 times [2024-11-24 01:01:20,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:01:20,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728974226] [2024-11-24 01:01:20,002 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:01:20,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:01:20,075 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:01:20,075 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:01:20,801 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-11-24 01:01:20,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:01:20,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728974226] [2024-11-24 01:01:20,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728974226] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:01:20,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776457586] [2024-11-24 01:01:20,802 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:01:20,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:01:20,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:01:20,805 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:01:20,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-24 01:01:21,177 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:01:21,177 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:01:21,181 INFO L256 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-24 01:01:21,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:01:21,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-24 01:01:21,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-24 01:01:23,451 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-24 01:01:23,451 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:01:24,639 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-24 01:01:24,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776457586] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:01:24,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:01:24,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 9] total 27 [2024-11-24 01:01:24,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409306342] [2024-11-24 01:01:24,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:01:24,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-24 01:01:24,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:01:24,642 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-24 01:01:24,642 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2024-11-24 01:01:24,642 INFO L87 Difference]: Start difference. First operand 112 states and 142 transitions. Second operand has 27 states, 26 states have (on average 4.923076923076923) internal successors, (128), 25 states have internal predecessors, (128), 9 states have call successors, (30), 5 states have call predecessors, (30), 8 states have return successors, (29), 9 states have call predecessors, (29), 9 states have call successors, (29) [2024-11-24 01:01:29,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 01:01:33,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 01:01:37,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 01:01:40,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:01:40,687 INFO L93 Difference]: Finished difference Result 289 states and 371 transitions. [2024-11-24 01:01:40,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-24 01:01:40,688 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.923076923076923) internal successors, (128), 25 states have internal predecessors, (128), 9 states have call successors, (30), 5 states have call predecessors, (30), 8 states have return successors, (29), 9 states have call predecessors, (29), 9 states have call successors, (29) Word has length 112 [2024-11-24 01:01:40,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:01:40,691 INFO L225 Difference]: With dead ends: 289 [2024-11-24 01:01:40,691 INFO L226 Difference]: Without dead ends: 188 [2024-11-24 01:01:40,693 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 206 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=292, Invalid=2360, Unknown=0, NotChecked=0, Total=2652 [2024-11-24 01:01:40,694 INFO L435 NwaCegarLoop]: 111 mSDtfsCounter, 150 mSDsluCounter, 1445 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 71 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1556 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2024-11-24 01:01:40,694 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 1556 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1217 Invalid, 3 Unknown, 0 Unchecked, 14.4s Time] [2024-11-24 01:01:40,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2024-11-24 01:01:40,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 177. [2024-11-24 01:01:40,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 131 states have (on average 1.1908396946564885) internal successors, (156), 133 states have internal predecessors, (156), 28 states have call successors, (28), 14 states have call predecessors, (28), 17 states have return successors, (35), 29 states have call predecessors, (35), 27 states have call successors, (35) [2024-11-24 01:01:40,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 219 transitions. [2024-11-24 01:01:40,729 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 219 transitions. Word has length 112 [2024-11-24 01:01:40,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:01:40,729 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 219 transitions. [2024-11-24 01:01:40,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.923076923076923) internal successors, (128), 25 states have internal predecessors, (128), 9 states have call successors, (30), 5 states have call predecessors, (30), 8 states have return successors, (29), 9 states have call predecessors, (29), 9 states have call successors, (29) [2024-11-24 01:01:40,730 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 219 transitions. [2024-11-24 01:01:40,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-24 01:01:40,731 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:01:40,732 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:01:40,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-24 01:01:40,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:01:40,933 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:01:40,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:01:40,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1954204067, now seen corresponding path program 1 times [2024-11-24 01:01:40,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:01:40,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810498993] [2024-11-24 01:01:40,933 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:01:40,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:01:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:01:41,782 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-11-24 01:01:41,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:01:41,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810498993] [2024-11-24 01:01:41,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810498993] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:01:41,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400069071] [2024-11-24 01:01:41,783 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:01:41,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:01:41,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:01:41,786 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:01:41,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-24 01:01:42,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:01:42,162 INFO L256 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-24 01:01:42,166 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:01:42,621 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-24 01:01:42,621 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:01:42,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400069071] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:01:42,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-24 01:01:42,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [8] total 15 [2024-11-24 01:01:42,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989301542] [2024-11-24 01:01:42,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:01:42,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-24 01:01:42,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:01:42,624 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-24 01:01:42,625 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2024-11-24 01:01:42,625 INFO L87 Difference]: Start difference. First operand 177 states and 219 transitions. Second operand has 12 states, 10 states have (on average 6.7) internal successors, (67), 10 states have internal predecessors, (67), 6 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-24 01:01:43,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:01:43,472 INFO L93 Difference]: Finished difference Result 294 states and 370 transitions. [2024-11-24 01:01:43,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-24 01:01:43,473 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 6.7) internal successors, (67), 10 states have internal predecessors, (67), 6 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 112 [2024-11-24 01:01:43,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:01:43,476 INFO L225 Difference]: With dead ends: 294 [2024-11-24 01:01:43,476 INFO L226 Difference]: Without dead ends: 182 [2024-11-24 01:01:43,477 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2024-11-24 01:01:43,480 INFO L435 NwaCegarLoop]: 94 mSDtfsCounter, 109 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-24 01:01:43,481 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 797 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-24 01:01:43,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-11-24 01:01:43,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 172. [2024-11-24 01:01:43,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 127 states have (on average 1.188976377952756) internal successors, (151), 129 states have internal predecessors, (151), 28 states have call successors, (28), 14 states have call predecessors, (28), 16 states have return successors, (33), 28 states have call predecessors, (33), 27 states have call successors, (33) [2024-11-24 01:01:43,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 212 transitions. [2024-11-24 01:01:43,527 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 212 transitions. Word has length 112 [2024-11-24 01:01:43,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:01:43,527 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 212 transitions. [2024-11-24 01:01:43,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 6.7) internal successors, (67), 10 states have internal predecessors, (67), 6 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-24 01:01:43,528 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 212 transitions. [2024-11-24 01:01:43,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-24 01:01:43,531 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:01:43,531 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:01:43,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-24 01:01:43,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:01:43,735 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:01:43,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:01:43,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1054526807, now seen corresponding path program 1 times [2024-11-24 01:01:43,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:01:43,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054251539] [2024-11-24 01:01:43,736 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:01:43,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:01:43,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:01:44,951 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-24 01:01:44,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:01:44,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054251539] [2024-11-24 01:01:44,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054251539] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:01:44,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:01:44,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-24 01:01:44,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680138371] [2024-11-24 01:01:44,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:01:44,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-24 01:01:44,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:01:44,953 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-24 01:01:44,953 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-24 01:01:44,953 INFO L87 Difference]: Start difference. First operand 172 states and 212 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 5 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-24 01:01:45,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:01:45,890 INFO L93 Difference]: Finished difference Result 256 states and 322 transitions. [2024-11-24 01:01:45,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-24 01:01:45,892 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 5 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 113 [2024-11-24 01:01:45,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:01:45,894 INFO L225 Difference]: With dead ends: 256 [2024-11-24 01:01:45,895 INFO L226 Difference]: Without dead ends: 173 [2024-11-24 01:01:45,895 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-11-24 01:01:45,896 INFO L435 NwaCegarLoop]: 108 mSDtfsCounter, 29 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-24 01:01:45,897 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 695 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-24 01:01:45,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-11-24 01:01:45,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2024-11-24 01:01:45,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 127 states have (on average 1.1732283464566928) internal successors, (149), 129 states have internal predecessors, (149), 28 states have call successors, (28), 14 states have call predecessors, (28), 16 states have return successors, (33), 28 states have call predecessors, (33), 27 states have call successors, (33) [2024-11-24 01:01:45,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 210 transitions. [2024-11-24 01:01:45,949 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 210 transitions. Word has length 113 [2024-11-24 01:01:45,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:01:45,950 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 210 transitions. [2024-11-24 01:01:45,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 5 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-24 01:01:45,950 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 210 transitions. [2024-11-24 01:01:45,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-24 01:01:45,952 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:01:45,953 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:01:45,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-24 01:01:45,953 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:01:45,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:01:45,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1447553817, now seen corresponding path program 1 times [2024-11-24 01:01:45,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:01:45,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879310455] [2024-11-24 01:01:45,954 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:01:45,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:01:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:01:48,122 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2024-11-24 01:01:48,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:01:48,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879310455] [2024-11-24 01:01:48,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879310455] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:01:48,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491359304] [2024-11-24 01:01:48,123 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:01:48,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:01:48,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:01:48,126 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:01:48,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-24 01:01:48,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:01:48,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-11-24 01:01:48,530 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:01:48,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-24 01:01:48,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2024-11-24 01:01:48,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2024-11-24 01:01:49,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2024-11-24 01:01:49,136 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-24 01:01:49,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2024-11-24 01:01:49,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2024-11-24 01:01:49,185 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-24 01:01:49,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2024-11-24 01:01:49,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2024-11-24 01:01:49,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2024-11-24 01:01:49,574 INFO L349 Elim1Store]: treesize reduction 175, result has 11.2 percent of original size [2024-11-24 01:01:49,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 131 treesize of output 63 [2024-11-24 01:01:49,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 01:01:49,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2024-11-24 01:01:49,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2024-11-24 01:01:57,900 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-24 01:01:57,900 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:02:00,478 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse3 (+ 16 |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.offset|)) (.cse5 (+ 8 |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.offset|)) (.cse10 (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) (.cse8 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24))) (and (forall ((v_ArrVal_1308 Int) (v_ArrVal_1314 (Array Int Int)) (v_ArrVal_1310 Int)) (let ((.cse6 (let ((.cse9 (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse10 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1308)))) (store .cse9 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse9 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse8 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|))))) (let ((.cse0 (let ((.cse7 (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1314))) (store .cse7 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse7 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse8 v_ArrVal_1310)))) (.cse4 (select .cse6 |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base|))) (let ((.cse1 (select .cse4 |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.offset|)) (.cse2 (select (select .cse0 |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.offset|))) (or (not (= (select (select .cse0 .cse1) .cse2) .cse3)) (= (select .cse4 .cse5) 0) (not (= |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base| (select (select .cse6 .cse1) .cse2)))))))) (forall ((v_ArrVal_1308 Int) (v_ArrVal_1314 (Array Int Int)) (v_ArrVal_1310 Int)) (let ((.cse11 (let ((.cse17 (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1314))) (store .cse17 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse17 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse8 v_ArrVal_1310))))) (let ((.cse15 (select .cse11 |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base|)) (.cse14 (let ((.cse16 (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse10 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1308)))) (store .cse16 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse16 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse8 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|))))) (let ((.cse12 (select (select .cse14 |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.offset|)) (.cse13 (select .cse15 |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.offset|))) (or (not (= (select (select .cse11 .cse12) .cse13) .cse3)) (not (= |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base| (select (select .cse14 .cse12) .cse13))) (= (select .cse15 .cse5) 0)))))))) is different from false [2024-11-24 01:02:00,617 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 01:02:00,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 579 treesize of output 559 [2024-11-24 01:02:00,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2024-11-24 01:02:03,650 INFO L349 Elim1Store]: treesize reduction 1544, result has 37.5 percent of original size [2024-11-24 01:02:03,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 4770 treesize of output 4556 [2024-11-24 01:02:03,844 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 01:02:03,844 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 3144 treesize of output 3028 [2024-11-24 01:02:04,211 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 01:02:04,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 3425 treesize of output 3438 [2024-11-24 01:02:11,471 WARN L286 SmtUtils]: Spent 6.82s on a formula simplification. DAG size of input: 521 DAG size of output: 319 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-24 01:02:11,471 INFO L349 Elim1Store]: treesize reduction 1863, result has 37.7 percent of original size [2024-11-24 01:02:11,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 3 disjoint index pairs (out of 78 index pairs), introduced 16 new quantified variables, introduced 94 case distinctions, treesize of input 22044 treesize of output 13422 [2024-11-24 01:02:13,263 INFO L349 Elim1Store]: treesize reduction 34, result has 74.0 percent of original size [2024-11-24 01:02:13,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 9486 treesize of output 7978 [2024-11-24 01:02:14,568 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 01:02:14,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 7362 treesize of output 7126 [2024-11-24 01:07:03,246 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-24 01:07:03,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 101 [2024-11-24 01:07:03,247 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-11-24 01:07:03,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-24 01:07:03,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:07:03,449 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:275) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:499) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:484) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:590) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:245) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:318) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:728) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:234) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:416) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:395) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:267) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:325) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:181) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:428) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:314) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:275) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:132) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 69 more [2024-11-24 01:07:03,455 INFO L158 Benchmark]: Toolchain (without parser) took 410471.02ms. Allocated memory was 117.4MB in the beginning and 1.3GB in the end (delta: 1.2GB). Free memory was 85.8MB in the beginning and 961.0MB in the end (delta: -875.3MB). Peak memory consumption was 818.9MB. Max. memory is 16.1GB. [2024-11-24 01:07:03,457 INFO L158 Benchmark]: CDTParser took 0.45ms. Allocated memory is still 117.4MB. Free memory is still 72.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-24 01:07:03,457 INFO L158 Benchmark]: CACSL2BoogieTranslator took 3089.07ms. Allocated memory is still 117.4MB. Free memory was 85.5MB in the beginning and 60.4MB in the end (delta: 25.1MB). Peak memory consumption was 64.7MB. Max. memory is 16.1GB. [2024-11-24 01:07:03,458 INFO L158 Benchmark]: Boogie Procedure Inliner took 145.82ms. Allocated memory is still 117.4MB. Free memory was 59.8MB in the beginning and 54.7MB in the end (delta: 5.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-24 01:07:03,458 INFO L158 Benchmark]: Boogie Preprocessor took 95.10ms. Allocated memory is still 117.4MB. Free memory was 54.7MB in the beginning and 50.6MB in the end (delta: 4.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-24 01:07:03,458 INFO L158 Benchmark]: RCFGBuilder took 902.95ms. Allocated memory is still 117.4MB. Free memory was 50.6MB in the beginning and 62.3MB in the end (delta: -11.7MB). Peak memory consumption was 28.5MB. Max. memory is 16.1GB. [2024-11-24 01:07:03,458 INFO L158 Benchmark]: TraceAbstraction took 406229.46ms. Allocated memory was 117.4MB in the beginning and 1.3GB in the end (delta: 1.2GB). Free memory was 61.6MB in the beginning and 961.0MB in the end (delta: -899.4MB). Peak memory consumption was 794.4MB. Max. memory is 16.1GB. [2024-11-24 01:07:03,460 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45ms. Allocated memory is still 117.4MB. Free memory is still 72.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 3089.07ms. Allocated memory is still 117.4MB. Free memory was 85.5MB in the beginning and 60.4MB in the end (delta: 25.1MB). Peak memory consumption was 64.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 145.82ms. Allocated memory is still 117.4MB. Free memory was 59.8MB in the beginning and 54.7MB in the end (delta: 5.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 95.10ms. Allocated memory is still 117.4MB. Free memory was 54.7MB in the beginning and 50.6MB in the end (delta: 4.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 902.95ms. Allocated memory is still 117.4MB. Free memory was 50.6MB in the beginning and 62.3MB in the end (delta: -11.7MB). Peak memory consumption was 28.5MB. Max. memory is 16.1GB. * TraceAbstraction took 406229.46ms. Allocated memory was 117.4MB in the beginning and 1.3GB in the end (delta: 1.2GB). Free memory was 61.6MB in the beginning and 961.0MB in the end (delta: -899.4MB). Peak memory consumption was 794.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/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_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/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 64bit --witnessprinter.graph.data.programhash baad12004cda93802c22774fa87dd5ddbc51e76f7e3c81692100acfcfda43c3a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-24 01:07:06,519 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-24 01:07:06,681 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2024-11-24 01:07:06,695 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-24 01:07:06,695 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-24 01:07:06,741 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-24 01:07:06,742 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-24 01:07:06,743 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-24 01:07:06,743 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-24 01:07:06,744 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-24 01:07:06,745 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-24 01:07:06,745 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-24 01:07:06,745 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-24 01:07:06,745 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-24 01:07:06,746 INFO L153 SettingsManager]: * Use SBE=true [2024-11-24 01:07:06,746 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-24 01:07:06,746 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-24 01:07:06,746 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-24 01:07:06,747 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-24 01:07:06,747 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-24 01:07:06,747 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-24 01:07:06,748 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-24 01:07:06,748 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-24 01:07:06,748 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-24 01:07:06,748 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-24 01:07:06,748 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-24 01:07:06,748 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-24 01:07:06,749 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-24 01:07:06,749 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 01:07:06,749 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 01:07:06,749 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 01:07:06,749 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:07:06,749 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-24 01:07:06,749 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 01:07:06,750 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 01:07:06,751 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 01:07:06,751 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:07:06,751 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-24 01:07:06,751 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-24 01:07:06,751 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-24 01:07:06,751 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-24 01:07:06,752 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-24 01:07:06,752 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-24 01:07:06,752 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-24 01:07:06,752 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-24 01:07:06,752 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-24 01:07:06,752 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-24 01:07:06,752 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_f368beec-78ba-48e5-8b66-019da9ceeb05/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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> baad12004cda93802c22774fa87dd5ddbc51e76f7e3c81692100acfcfda43c3a [2024-11-24 01:07:07,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-24 01:07:07,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-24 01:07:07,197 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-24 01:07:07,199 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-24 01:07:07,199 INFO L274 PluginConnector]: CDTParser initialized [2024-11-24 01:07:07,204 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i [2024-11-24 01:07:10,636 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/data/fb82ec180/0a3f2df317c54c4fac06d5d97623751e/FLAGc0a0be626 [2024-11-24 01:07:11,268 INFO L384 CDTParser]: Found 1 translation units. [2024-11-24 01:07:11,269 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i [2024-11-24 01:07:11,338 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/data/fb82ec180/0a3f2df317c54c4fac06d5d97623751e/FLAGc0a0be626 [2024-11-24 01:07:11,367 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/data/fb82ec180/0a3f2df317c54c4fac06d5d97623751e [2024-11-24 01:07:11,372 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-24 01:07:11,375 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-24 01:07:11,378 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-24 01:07:11,379 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-24 01:07:11,385 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-24 01:07:11,386 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:07:11" (1/1) ... [2024-11-24 01:07:11,389 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c156f3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:07:11, skipping insertion in model container [2024-11-24 01:07:11,390 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:07:11" (1/1) ... [2024-11-24 01:07:11,509 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-24 01:07:11,841 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_f368beec-78ba-48e5-8b66-019da9ceeb05/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4494,4507] [2024-11-24 01:07:11,849 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_f368beec-78ba-48e5-8b66-019da9ceeb05/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4554,4567] [2024-11-24 01:07:12,711 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:12,868 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:12,868 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:12,870 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:12,900 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:12,907 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:12,908 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:12,909 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:12,910 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:12,912 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:12,913 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:12,921 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:12,924 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:12,928 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:12,928 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:12,941 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:12,941 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:12,942 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:12,942 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:12,944 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:12,945 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:12,946 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:12,946 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:12,948 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:12,950 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:12,950 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:12,951 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:12,951 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:12,952 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:13,474 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:13,474 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:13,475 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:13,476 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:13,638 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:13,660 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_f368beec-78ba-48e5-8b66-019da9ceeb05/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[150650,150663] [2024-11-24 01:07:13,661 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 01:07:13,685 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-11-24 01:07:13,724 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-24 01:07:13,734 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_f368beec-78ba-48e5-8b66-019da9ceeb05/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4494,4507] [2024-11-24 01:07:13,735 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_f368beec-78ba-48e5-8b66-019da9ceeb05/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4554,4567] [2024-11-24 01:07:13,782 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:13,811 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:13,812 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:13,814 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:13,854 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:13,859 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:13,861 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:13,861 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:13,864 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:13,865 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:13,866 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:13,869 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:13,873 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:13,875 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:13,875 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:13,886 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:13,887 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:13,887 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:13,887 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:13,889 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:13,891 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:13,891 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:13,892 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:13,893 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:13,895 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:13,896 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:13,896 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:13,896 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:13,899 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:13,996 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:13,997 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:13,998 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:13,998 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:14,041 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:07:14,053 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_f368beec-78ba-48e5-8b66-019da9ceeb05/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[150650,150663] [2024-11-24 01:07:14,054 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 01:07:14,066 INFO L200 MainTranslator]: Completed pre-run [2024-11-24 01:07:14,087 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_f368beec-78ba-48e5-8b66-019da9ceeb05/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4494,4507] [2024-11-24 01:07:14,087 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_f368beec-78ba-48e5-8b66-019da9ceeb05/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4554,4567] [2024-11-24 01:07:14,154 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:14,155 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:14,155 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:14,156 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:14,159 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:14,167 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:14,168 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:14,169 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:14,169 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:14,173 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:14,174 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:14,174 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:14,174 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-24 01:07:14,332 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_f368beec-78ba-48e5-8b66-019da9ceeb05/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[150650,150663] [2024-11-24 01:07:14,333 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 01:07:14,685 INFO L204 MainTranslator]: Completed translation [2024-11-24 01:07:14,686 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:07:14 WrapperNode [2024-11-24 01:07:14,686 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-24 01:07:14,688 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-24 01:07:14,688 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-24 01:07:14,688 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-24 01:07:14,697 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:07:14" (1/1) ... [2024-11-24 01:07:14,796 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:07:14" (1/1) ... [2024-11-24 01:07:14,841 INFO L138 Inliner]: procedures = 687, calls = 1043, calls flagged for inlining = 51, calls inlined = 5, statements flattened = 134 [2024-11-24 01:07:14,841 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-24 01:07:14,842 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-24 01:07:14,842 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-24 01:07:14,842 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-24 01:07:14,852 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:07:14" (1/1) ... [2024-11-24 01:07:14,853 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:07:14" (1/1) ... [2024-11-24 01:07:14,861 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:07:14" (1/1) ... [2024-11-24 01:07:14,896 INFO L175 MemorySlicer]: Split 27 memory accesses to 3 slices as follows [2, 5, 20]. 74 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 6 writes are split as follows [0, 0, 6]. [2024-11-24 01:07:14,896 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:07:14" (1/1) ... [2024-11-24 01:07:14,897 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:07:14" (1/1) ... [2024-11-24 01:07:14,919 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:07:14" (1/1) ... [2024-11-24 01:07:14,923 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:07:14" (1/1) ... [2024-11-24 01:07:14,930 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:07:14" (1/1) ... [2024-11-24 01:07:14,944 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:07:14" (1/1) ... [2024-11-24 01:07:14,949 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:07:14" (1/1) ... [2024-11-24 01:07:14,970 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-24 01:07:14,971 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-24 01:07:14,971 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-24 01:07:14,971 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-24 01:07:14,972 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:07:14" (1/1) ... [2024-11-24 01:07:14,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:07:14,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:07:15,010 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-24 01:07:15,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-24 01:07:15,046 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_back [2024-11-24 01:07:15,046 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_back [2024-11-24 01:07:15,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-24 01:07:15,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-24 01:07:15,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-24 01:07:15,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-11-24 01:07:15,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-24 01:07:15,047 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-24 01:07:15,048 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2024-11-24 01:07:15,048 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2024-11-24 01:07:15,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-24 01:07:15,048 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2024-11-24 01:07:15,048 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2024-11-24 01:07:15,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-24 01:07:15,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-24 01:07:15,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-24 01:07:15,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-24 01:07:15,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-24 01:07:15,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-24 01:07:15,050 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2024-11-24 01:07:15,050 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2024-11-24 01:07:15,050 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-24 01:07:15,050 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-24 01:07:15,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-24 01:07:15,051 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-24 01:07:15,051 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-24 01:07:15,051 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-24 01:07:15,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-24 01:07:15,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-24 01:07:15,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-24 01:07:15,051 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2024-11-24 01:07:15,051 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2024-11-24 01:07:15,051 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2024-11-24 01:07:15,052 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2024-11-24 01:07:15,440 INFO L234 CfgBuilder]: Building ICFG [2024-11-24 01:07:15,443 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-24 01:07:16,056 INFO L? ?]: Removed 61 outVars from TransFormulas that were not future-live. [2024-11-24 01:07:16,056 INFO L283 CfgBuilder]: Performing block encoding [2024-11-24 01:07:16,072 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-24 01:07:16,073 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-24 01:07:16,074 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:07:16 BoogieIcfgContainer [2024-11-24 01:07:16,074 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-24 01:07:16,077 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-24 01:07:16,077 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-24 01:07:16,084 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-24 01:07:16,084 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 01:07:11" (1/3) ... [2024-11-24 01:07:16,085 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ade8fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:07:16, skipping insertion in model container [2024-11-24 01:07:16,085 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:07:14" (2/3) ... [2024-11-24 01:07:16,086 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ade8fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:07:16, skipping insertion in model container [2024-11-24 01:07:16,087 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:07:16" (3/3) ... [2024-11-24 01:07:16,089 INFO L128 eAbstractionObserver]: Analyzing ICFG aws_linked_list_back_harness.i [2024-11-24 01:07:16,111 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-24 01:07:16,112 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG aws_linked_list_back_harness.i that has 9 procedures, 98 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-24 01:07:16,194 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-24 01:07:16,213 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;@14539ea9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-24 01:07:16,214 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-24 01:07:16,220 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 64 states have (on average 1.296875) internal successors, (83), 65 states have internal predecessors, (83), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-24 01:07:16,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-24 01:07:16,234 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:07:16,235 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:07:16,235 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:07:16,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:07:16,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1690245469, now seen corresponding path program 1 times [2024-11-24 01:07:16,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:07:16,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1565359168] [2024-11-24 01:07:16,268 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:07:16,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:07:16,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:07:16,271 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:07:16,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-24 01:07:16,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:07:16,680 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-24 01:07:16,694 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:07:16,748 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-24 01:07:16,748 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:07:16,750 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:07:16,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565359168] [2024-11-24 01:07:16,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565359168] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:07:16,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:07:16,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-24 01:07:16,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962498222] [2024-11-24 01:07:16,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:07:16,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-24 01:07:16,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:07:16,787 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-24 01:07:16,789 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-24 01:07:16,792 INFO L87 Difference]: Start difference. First operand has 98 states, 64 states have (on average 1.296875) internal successors, (83), 65 states have internal predecessors, (83), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-24 01:07:16,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:07:16,858 INFO L93 Difference]: Finished difference Result 188 states and 271 transitions. [2024-11-24 01:07:16,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-24 01:07:16,861 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 84 [2024-11-24 01:07:16,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:07:16,871 INFO L225 Difference]: With dead ends: 188 [2024-11-24 01:07:16,871 INFO L226 Difference]: Without dead ends: 93 [2024-11-24 01:07:16,876 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-24 01:07:16,880 INFO L435 NwaCegarLoop]: 127 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 01:07:16,881 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 01:07:16,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-24 01:07:16,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2024-11-24 01:07:16,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.25) internal successors, (75), 61 states have internal predecessors, (75), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-24 01:07:16,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2024-11-24 01:07:16,938 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 84 [2024-11-24 01:07:16,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:07:16,938 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2024-11-24 01:07:16,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-24 01:07:16,939 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2024-11-24 01:07:16,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-24 01:07:16,943 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:07:16,943 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:07:16,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-24 01:07:17,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:07:17,148 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:07:17,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:07:17,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1691347493, now seen corresponding path program 1 times [2024-11-24 01:07:17,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:07:17,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229293598] [2024-11-24 01:07:17,151 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:07:17,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:07:17,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:07:17,153 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:07:17,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-24 01:07:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:07:17,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-24 01:07:17,493 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:07:17,607 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-24 01:07:17,608 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:07:17,608 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:07:17,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229293598] [2024-11-24 01:07:17,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229293598] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:07:17,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:07:17,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-24 01:07:17,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678116078] [2024-11-24 01:07:17,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:07:17,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 01:07:17,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:07:17,615 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 01:07:17,615 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-24 01:07:17,615 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-24 01:07:17,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:07:17,757 INFO L93 Difference]: Finished difference Result 169 states and 224 transitions. [2024-11-24 01:07:17,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 01:07:17,758 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 84 [2024-11-24 01:07:17,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:07:17,761 INFO L225 Difference]: With dead ends: 169 [2024-11-24 01:07:17,761 INFO L226 Difference]: Without dead ends: 95 [2024-11-24 01:07:17,762 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-24 01:07:17,762 INFO L435 NwaCegarLoop]: 116 mSDtfsCounter, 0 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 01:07:17,763 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 564 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 01:07:17,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-24 01:07:17,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-11-24 01:07:17,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 63 states have internal predecessors, (76), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2024-11-24 01:07:17,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 125 transitions. [2024-11-24 01:07:17,776 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 125 transitions. Word has length 84 [2024-11-24 01:07:17,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:07:17,776 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 125 transitions. [2024-11-24 01:07:17,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-24 01:07:17,776 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 125 transitions. [2024-11-24 01:07:17,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-24 01:07:17,779 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:07:17,779 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:07:17,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-24 01:07:17,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:07:17,984 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:07:17,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:07:17,985 INFO L85 PathProgramCache]: Analyzing trace with hash 175823383, now seen corresponding path program 1 times [2024-11-24 01:07:17,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:07:17,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290838983] [2024-11-24 01:07:17,986 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:07:17,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:07:17,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:07:17,989 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:07:17,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-24 01:07:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:07:18,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:07:18,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:07:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-24 01:07:18,488 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:07:18,488 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:07:18,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290838983] [2024-11-24 01:07:18,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290838983] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:07:18,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:07:18,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-24 01:07:18,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159464866] [2024-11-24 01:07:18,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:07:18,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-24 01:07:18,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:07:18,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-24 01:07:18,491 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-24 01:07:18,491 INFO L87 Difference]: Start difference. First operand 95 states and 125 transitions. Second operand has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-24 01:07:18,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:07:18,907 INFO L93 Difference]: Finished difference Result 176 states and 233 transitions. [2024-11-24 01:07:18,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 01:07:18,908 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 86 [2024-11-24 01:07:18,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:07:18,910 INFO L225 Difference]: With dead ends: 176 [2024-11-24 01:07:18,910 INFO L226 Difference]: Without dead ends: 97 [2024-11-24 01:07:18,911 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-24 01:07:18,916 INFO L435 NwaCegarLoop]: 109 mSDtfsCounter, 32 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-24 01:07:18,917 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 681 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-24 01:07:18,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-24 01:07:18,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2024-11-24 01:07:18,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 63 states have internal predecessors, (75), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2024-11-24 01:07:18,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 124 transitions. [2024-11-24 01:07:18,959 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 124 transitions. Word has length 86 [2024-11-24 01:07:18,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:07:18,960 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 124 transitions. [2024-11-24 01:07:18,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-24 01:07:18,961 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 124 transitions. [2024-11-24 01:07:18,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-24 01:07:18,966 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:07:18,967 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:07:18,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-24 01:07:19,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:07:19,167 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:07:19,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:07:19,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1579563579, now seen corresponding path program 1 times [2024-11-24 01:07:19,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:07:19,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272091599] [2024-11-24 01:07:19,169 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:07:19,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:07:19,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:07:19,174 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:07:19,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-24 01:07:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:07:19,436 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-24 01:07:19,443 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:07:19,679 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-24 01:07:19,682 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:07:19,682 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:07:19,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272091599] [2024-11-24 01:07:19,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272091599] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:07:19,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:07:19,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-24 01:07:19,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320483131] [2024-11-24 01:07:19,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:07:19,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-24 01:07:19,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:07:19,684 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-24 01:07:19,684 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-24 01:07:19,685 INFO L87 Difference]: Start difference. First operand 95 states and 124 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-24 01:07:20,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:07:20,150 INFO L93 Difference]: Finished difference Result 182 states and 241 transitions. [2024-11-24 01:07:20,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-24 01:07:20,152 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 88 [2024-11-24 01:07:20,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:07:20,154 INFO L225 Difference]: With dead ends: 182 [2024-11-24 01:07:20,158 INFO L226 Difference]: Without dead ends: 102 [2024-11-24 01:07:20,159 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-11-24 01:07:20,160 INFO L435 NwaCegarLoop]: 106 mSDtfsCounter, 41 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-24 01:07:20,160 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 765 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-24 01:07:20,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-24 01:07:20,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2024-11-24 01:07:20,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 64 states have internal predecessors, (76), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2024-11-24 01:07:20,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 125 transitions. [2024-11-24 01:07:20,186 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 125 transitions. Word has length 88 [2024-11-24 01:07:20,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:07:20,186 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 125 transitions. [2024-11-24 01:07:20,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-24 01:07:20,187 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 125 transitions. [2024-11-24 01:07:20,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-24 01:07:20,192 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:07:20,192 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:07:20,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-24 01:07:20,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:07:20,393 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:07:20,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:07:20,394 INFO L85 PathProgramCache]: Analyzing trace with hash -851687289, now seen corresponding path program 1 times [2024-11-24 01:07:20,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:07:20,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808953258] [2024-11-24 01:07:20,395 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:07:20,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:07:20,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:07:20,401 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:07:20,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-24 01:07:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:07:20,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-24 01:07:20,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:07:20,696 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-24 01:07:20,696 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:07:20,699 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:07:20,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808953258] [2024-11-24 01:07:20,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808953258] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:07:20,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:07:20,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 01:07:20,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992270173] [2024-11-24 01:07:20,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:07:20,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 01:07:20,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:07:20,701 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 01:07:20,701 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 01:07:20,702 INFO L87 Difference]: Start difference. First operand 96 states and 125 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-11-24 01:07:20,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:07:20,772 INFO L93 Difference]: Finished difference Result 177 states and 236 transitions. [2024-11-24 01:07:20,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 01:07:20,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 89 [2024-11-24 01:07:20,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:07:20,775 INFO L225 Difference]: With dead ends: 177 [2024-11-24 01:07:20,775 INFO L226 Difference]: Without dead ends: 100 [2024-11-24 01:07:20,780 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 01:07:20,781 INFO L435 NwaCegarLoop]: 118 mSDtfsCounter, 2 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 01:07:20,781 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 231 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 01:07:20,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-24 01:07:20,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2024-11-24 01:07:20,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 65 states have internal predecessors, (77), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2024-11-24 01:07:20,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions. [2024-11-24 01:07:20,810 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 89 [2024-11-24 01:07:20,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:07:20,811 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 126 transitions. [2024-11-24 01:07:20,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-11-24 01:07:20,815 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions. [2024-11-24 01:07:20,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-24 01:07:20,817 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:07:20,817 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:07:20,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-24 01:07:21,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:07:21,018 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:07:21,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:07:21,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1909150967, now seen corresponding path program 1 times [2024-11-24 01:07:21,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:07:21,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292411700] [2024-11-24 01:07:21,020 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:07:21,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:07:21,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:07:21,024 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:07:21,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-24 01:07:21,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:07:21,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-24 01:07:21,282 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:07:21,359 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-24 01:07:21,359 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:07:21,360 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:07:21,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292411700] [2024-11-24 01:07:21,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292411700] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:07:21,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:07:21,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-24 01:07:21,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183131564] [2024-11-24 01:07:21,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:07:21,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 01:07:21,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:07:21,364 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 01:07:21,365 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-24 01:07:21,365 INFO L87 Difference]: Start difference. First operand 97 states and 126 transitions. Second operand has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-24 01:07:21,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:07:21,498 INFO L93 Difference]: Finished difference Result 178 states and 233 transitions. [2024-11-24 01:07:21,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 01:07:21,498 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 97 [2024-11-24 01:07:21,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:07:21,500 INFO L225 Difference]: With dead ends: 178 [2024-11-24 01:07:21,500 INFO L226 Difference]: Without dead ends: 100 [2024-11-24 01:07:21,501 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-24 01:07:21,502 INFO L435 NwaCegarLoop]: 114 mSDtfsCounter, 0 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 666 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 [2024-11-24 01:07:21,506 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 666 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 01:07:21,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-24 01:07:21,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2024-11-24 01:07:21,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 64 states have (on average 1.21875) internal successors, (78), 66 states have internal predecessors, (78), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2024-11-24 01:07:21,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 127 transitions. [2024-11-24 01:07:21,538 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 127 transitions. Word has length 97 [2024-11-24 01:07:21,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:07:21,538 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 127 transitions. [2024-11-24 01:07:21,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-24 01:07:21,538 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 127 transitions. [2024-11-24 01:07:21,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-24 01:07:21,540 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:07:21,540 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:07:21,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-24 01:07:21,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:07:21,744 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:07:21,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:07:21,745 INFO L85 PathProgramCache]: Analyzing trace with hash 509813303, now seen corresponding path program 1 times [2024-11-24 01:07:21,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:07:21,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [120222832] [2024-11-24 01:07:21,745 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:07:21,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:07:21,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:07:21,748 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:07:21,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-24 01:07:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:07:21,964 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-24 01:07:21,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:07:22,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-24 01:07:22,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-24 01:07:26,914 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| (_ BitVec 64)) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$#2.base| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|) (_ bv0 64)))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| (_ BitVec 64)) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#2.offset| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|))))) is different from true [2024-11-24 01:07:27,312 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-24 01:07:27,312 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:07:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-11-24 01:07:27,938 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:07:27,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120222832] [2024-11-24 01:07:27,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120222832] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:07:27,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:07:27,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2024-11-24 01:07:27,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674969914] [2024-11-24 01:07:27,939 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:07:27,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-24 01:07:27,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:07:27,940 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-24 01:07:27,941 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=199, Unknown=1, NotChecked=28, Total=272 [2024-11-24 01:07:27,941 INFO L87 Difference]: Start difference. First operand 98 states and 127 transitions. Second operand has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 5 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2024-11-24 01:07:29,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:07:29,549 INFO L93 Difference]: Finished difference Result 221 states and 300 transitions. [2024-11-24 01:07:29,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-24 01:07:29,553 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 5 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 99 [2024-11-24 01:07:29,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:07:29,556 INFO L225 Difference]: With dead ends: 221 [2024-11-24 01:07:29,557 INFO L226 Difference]: Without dead ends: 142 [2024-11-24 01:07:29,561 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=76, Invalid=347, Unknown=1, NotChecked=38, Total=462 [2024-11-24 01:07:29,561 INFO L435 NwaCegarLoop]: 114 mSDtfsCounter, 67 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 308 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-24 01:07:29,562 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 914 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 300 Invalid, 0 Unknown, 308 Unchecked, 1.2s Time] [2024-11-24 01:07:29,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-24 01:07:29,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 116. [2024-11-24 01:07:29,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 80 states have (on average 1.25) internal successors, (100), 82 states have internal predecessors, (100), 25 states have call successors, (25), 9 states have call predecessors, (25), 10 states have return successors, (27), 24 states have call predecessors, (27), 24 states have call successors, (27) [2024-11-24 01:07:29,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 152 transitions. [2024-11-24 01:07:29,599 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 152 transitions. Word has length 99 [2024-11-24 01:07:29,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:07:29,600 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 152 transitions. [2024-11-24 01:07:29,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 5 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2024-11-24 01:07:29,600 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 152 transitions. [2024-11-24 01:07:29,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-24 01:07:29,602 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:07:29,603 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:07:29,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-24 01:07:29,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:07:29,804 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:07:29,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:07:29,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1823579335, now seen corresponding path program 1 times [2024-11-24 01:07:29,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:07:29,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250087336] [2024-11-24 01:07:29,805 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:07:29,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:07:29,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:07:29,807 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:07:29,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-24 01:07:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:07:30,043 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-24 01:07:30,045 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:07:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-24 01:07:30,073 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:07:30,073 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:07:30,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250087336] [2024-11-24 01:07:30,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250087336] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:07:30,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:07:30,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:07:30,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596691829] [2024-11-24 01:07:30,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:07:30,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:07:30,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:07:30,075 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:07:30,075 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:07:30,075 INFO L87 Difference]: Start difference. First operand 116 states and 152 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-24 01:07:30,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:07:30,120 INFO L93 Difference]: Finished difference Result 214 states and 286 transitions. [2024-11-24 01:07:30,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:07:30,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 99 [2024-11-24 01:07:30,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:07:30,123 INFO L225 Difference]: With dead ends: 214 [2024-11-24 01:07:30,123 INFO L226 Difference]: Without dead ends: 117 [2024-11-24 01:07:30,124 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:07:30,125 INFO L435 NwaCegarLoop]: 121 mSDtfsCounter, 0 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 01:07:30,125 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 351 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 01:07:30,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-24 01:07:30,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2024-11-24 01:07:30,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 80 states have (on average 1.2375) internal successors, (99), 82 states have internal predecessors, (99), 25 states have call successors, (25), 9 states have call predecessors, (25), 10 states have return successors, (27), 24 states have call predecessors, (27), 24 states have call successors, (27) [2024-11-24 01:07:30,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 151 transitions. [2024-11-24 01:07:30,140 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 151 transitions. Word has length 99 [2024-11-24 01:07:30,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:07:30,141 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 151 transitions. [2024-11-24 01:07:30,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-24 01:07:30,141 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 151 transitions. [2024-11-24 01:07:30,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-24 01:07:30,142 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:07:30,142 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:07:30,157 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-24 01:07:30,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:07:30,343 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:07:30,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:07:30,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1262879557, now seen corresponding path program 1 times [2024-11-24 01:07:30,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:07:30,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1751556434] [2024-11-24 01:07:30,345 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:07:30,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:07:30,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:07:30,347 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:07:30,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-24 01:07:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:07:30,583 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-24 01:07:30,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:07:30,607 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-24 01:07:30,620 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:07:30,620 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:07:30,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751556434] [2024-11-24 01:07:30,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751556434] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:07:30,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:07:30,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:07:30,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697846403] [2024-11-24 01:07:30,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:07:30,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:07:30,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:07:30,622 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:07:30,622 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:07:30,623 INFO L87 Difference]: Start difference. First operand 116 states and 151 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-24 01:07:30,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:07:30,669 INFO L93 Difference]: Finished difference Result 213 states and 285 transitions. [2024-11-24 01:07:30,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:07:30,670 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 99 [2024-11-24 01:07:30,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:07:30,672 INFO L225 Difference]: With dead ends: 213 [2024-11-24 01:07:30,672 INFO L226 Difference]: Without dead ends: 116 [2024-11-24 01:07:30,673 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:07:30,674 INFO L435 NwaCegarLoop]: 121 mSDtfsCounter, 0 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 01:07:30,674 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 352 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 01:07:30,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-24 01:07:30,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2024-11-24 01:07:30,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 79 states have internal predecessors, (94), 25 states have call successors, (25), 9 states have call predecessors, (25), 10 states have return successors, (27), 24 states have call predecessors, (27), 24 states have call successors, (27) [2024-11-24 01:07:30,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 146 transitions. [2024-11-24 01:07:30,690 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 146 transitions. Word has length 99 [2024-11-24 01:07:30,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:07:30,690 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 146 transitions. [2024-11-24 01:07:30,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-24 01:07:30,691 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 146 transitions. [2024-11-24 01:07:30,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-24 01:07:30,692 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:07:30,692 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:07:30,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-24 01:07:30,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:07:30,893 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:07:30,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:07:30,894 INFO L85 PathProgramCache]: Analyzing trace with hash -505513387, now seen corresponding path program 1 times [2024-11-24 01:07:30,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:07:30,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955898108] [2024-11-24 01:07:30,894 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:07:30,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:07:30,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:07:30,897 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:07:30,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-24 01:07:31,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:07:31,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-24 01:07:31,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:07:31,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 01:07:31,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 01:07:34,050 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-24 01:07:34,050 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:07:35,571 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-11-24 01:07:35,571 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:07:35,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955898108] [2024-11-24 01:07:35,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955898108] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:07:35,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:07:35,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 21 [2024-11-24 01:07:35,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530703780] [2024-11-24 01:07:35,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:07:35,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-24 01:07:35,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:07:35,573 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-24 01:07:35,574 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-11-24 01:07:35,574 INFO L87 Difference]: Start difference. First operand 113 states and 146 transitions. Second operand has 21 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 9 states have call successors, (25), 5 states have call predecessors, (25), 6 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-24 01:07:40,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 01:07:44,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 01:07:49,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 01:07:53,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 01:07:58,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 01:08:02,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:08:02,634 INFO L93 Difference]: Finished difference Result 273 states and 346 transitions. [2024-11-24 01:08:02,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-24 01:08:02,636 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 9 states have call successors, (25), 5 states have call predecessors, (25), 6 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 100 [2024-11-24 01:08:02,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:08:02,638 INFO L225 Difference]: With dead ends: 273 [2024-11-24 01:08:02,638 INFO L226 Difference]: Without dead ends: 182 [2024-11-24 01:08:02,639 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 174 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2024-11-24 01:08:02,640 INFO L435 NwaCegarLoop]: 119 mSDtfsCounter, 127 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 49 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.6s IncrementalHoareTripleChecker+Time [2024-11-24 01:08:02,640 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 1275 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 729 Invalid, 5 Unknown, 0 Unchecked, 25.6s Time] [2024-11-24 01:08:02,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-11-24 01:08:02,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 174. [2024-11-24 01:08:02,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 129 states have (on average 1.2170542635658914) internal successors, (157), 131 states have internal predecessors, (157), 28 states have call successors, (28), 15 states have call predecessors, (28), 16 states have return successors, (31), 27 states have call predecessors, (31), 27 states have call successors, (31) [2024-11-24 01:08:02,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 216 transitions. [2024-11-24 01:08:02,676 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 216 transitions. Word has length 100 [2024-11-24 01:08:02,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:08:02,676 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 216 transitions. [2024-11-24 01:08:02,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 9 states have call successors, (25), 5 states have call predecessors, (25), 6 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-24 01:08:02,677 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 216 transitions. [2024-11-24 01:08:02,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-24 01:08:02,680 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:08:02,680 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:08:02,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-24 01:08:02,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:08:02,881 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:08:02,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:08:02,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1314860013, now seen corresponding path program 1 times [2024-11-24 01:08:02,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:08:02,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430271831] [2024-11-24 01:08:02,882 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:08:02,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:08:02,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:08:02,884 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:08:02,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-24 01:08:03,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:08:03,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-24 01:08:03,100 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:08:03,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2024-11-24 01:08:03,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 01:08:06,088 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-24 01:08:06,088 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:08:06,088 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:08:06,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430271831] [2024-11-24 01:08:06,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430271831] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:08:06,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:08:06,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-24 01:08:06,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540452309] [2024-11-24 01:08:06,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:08:06,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-24 01:08:06,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:08:06,090 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-24 01:08:06,090 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-11-24 01:08:06,090 INFO L87 Difference]: Start difference. First operand 174 states and 216 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-24 01:08:09,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:08:09,838 INFO L93 Difference]: Finished difference Result 423 states and 530 transitions. [2024-11-24 01:08:09,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-24 01:08:09,839 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 100 [2024-11-24 01:08:09,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:08:09,842 INFO L225 Difference]: With dead ends: 423 [2024-11-24 01:08:09,842 INFO L226 Difference]: Without dead ends: 339 [2024-11-24 01:08:09,843 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 77 SyntacticMatches, 12 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2024-11-24 01:08:09,843 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 51 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-24 01:08:09,844 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 676 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-24 01:08:09,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2024-11-24 01:08:09,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 336. [2024-11-24 01:08:09,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 250 states have (on average 1.216) internal successors, (304), 254 states have internal predecessors, (304), 54 states have call successors, (54), 29 states have call predecessors, (54), 31 states have return successors, (60), 52 states have call predecessors, (60), 52 states have call successors, (60) [2024-11-24 01:08:09,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 418 transitions. [2024-11-24 01:08:09,905 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 418 transitions. Word has length 100 [2024-11-24 01:08:09,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:08:09,905 INFO L471 AbstractCegarLoop]: Abstraction has 336 states and 418 transitions. [2024-11-24 01:08:09,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-24 01:08:09,906 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 418 transitions. [2024-11-24 01:08:09,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-24 01:08:09,908 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:08:09,908 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:08:09,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-24 01:08:10,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:08:10,109 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:08:10,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:08:10,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1707887023, now seen corresponding path program 1 times [2024-11-24 01:08:10,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:08:10,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1447970649] [2024-11-24 01:08:10,110 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:08:10,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:08:10,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:08:10,112 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:08:10,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-24 01:08:10,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:08:10,351 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-24 01:08:10,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:08:10,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 01:08:14,105 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 47 proven. 5 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-24 01:08:14,106 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:08:17,360 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-11-24 01:08:17,360 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 30 treesize of output 25 [2024-11-24 01:08:17,679 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-11-24 01:08:17,679 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:08:17,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447970649] [2024-11-24 01:08:17,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447970649] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:08:17,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:08:17,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 25 [2024-11-24 01:08:17,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889800486] [2024-11-24 01:08:17,679 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:08:17,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-24 01:08:17,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:08:17,681 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-24 01:08:17,681 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2024-11-24 01:08:17,681 INFO L87 Difference]: Start difference. First operand 336 states and 418 transitions. Second operand has 25 states, 24 states have (on average 3.875) internal successors, (93), 24 states have internal predecessors, (93), 9 states have call successors, (25), 5 states have call predecessors, (25), 6 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-24 01:08:21,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 01:08:25,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 01:08:30,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 01:08:35,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:08:35,405 INFO L93 Difference]: Finished difference Result 515 states and 645 transitions. [2024-11-24 01:08:35,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-24 01:08:35,406 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.875) internal successors, (93), 24 states have internal predecessors, (93), 9 states have call successors, (25), 5 states have call predecessors, (25), 6 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 100 [2024-11-24 01:08:35,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:08:35,410 INFO L225 Difference]: With dead ends: 515 [2024-11-24 01:08:35,410 INFO L226 Difference]: Without dead ends: 351 [2024-11-24 01:08:35,411 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 169 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=271, Invalid=1369, Unknown=0, NotChecked=0, Total=1640 [2024-11-24 01:08:35,412 INFO L435 NwaCegarLoop]: 115 mSDtfsCounter, 179 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 66 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2024-11-24 01:08:35,412 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 1143 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 724 Invalid, 3 Unknown, 0 Unchecked, 15.7s Time] [2024-11-24 01:08:35,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2024-11-24 01:08:35,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 336. [2024-11-24 01:08:35,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 250 states have (on average 1.208) internal successors, (302), 254 states have internal predecessors, (302), 54 states have call successors, (54), 29 states have call predecessors, (54), 31 states have return successors, (60), 52 states have call predecessors, (60), 52 states have call successors, (60) [2024-11-24 01:08:35,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 416 transitions. [2024-11-24 01:08:35,472 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 416 transitions. Word has length 100 [2024-11-24 01:08:35,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:08:35,472 INFO L471 AbstractCegarLoop]: Abstraction has 336 states and 416 transitions. [2024-11-24 01:08:35,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.875) internal successors, (93), 24 states have internal predecessors, (93), 9 states have call successors, (25), 5 states have call predecessors, (25), 6 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-24 01:08:35,473 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 416 transitions. [2024-11-24 01:08:35,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-24 01:08:35,474 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:08:35,474 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:08:35,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-24 01:08:35,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:08:35,675 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:08:35,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:08:35,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1449721585, now seen corresponding path program 1 times [2024-11-24 01:08:35,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:08:35,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132095524] [2024-11-24 01:08:35,676 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:08:35,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:08:35,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:08:35,678 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:08:35,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-24 01:08:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:08:35,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-24 01:08:35,899 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:08:35,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 01:08:38,966 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 43 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-24 01:08:38,967 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:08:41,847 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:08:41,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132095524] [2024-11-24 01:08:41,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132095524] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:08:41,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1676795814] [2024-11-24 01:08:41,847 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:08:41,847 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-24 01:08:41,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/cvc4 [2024-11-24 01:08:41,849 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-24 01:08:41,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2024-11-24 01:08:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:08:42,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-24 01:08:42,340 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:08:42,745 INFO L349 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2024-11-24 01:08:42,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 72 [2024-11-24 01:08:42,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2024-11-24 01:08:42,794 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-24 01:08:42,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2024-11-24 01:08:42,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2024-11-24 01:08:42,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-11-24 01:08:47,565 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 43 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-24 01:08:47,565 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:08:51,788 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 01:08:51,789 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 226 treesize of output 221 [2024-11-24 01:08:51,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 156 [2024-11-24 01:08:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-24 01:08:52,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1676795814] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:08:52,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:08:52,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 44 [2024-11-24 01:08:52,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005019294] [2024-11-24 01:08:52,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:08:52,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-24 01:08:52,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:08:52,139 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-24 01:08:52,139 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=3098, Unknown=0, NotChecked=0, Total=3306 [2024-11-24 01:08:52,140 INFO L87 Difference]: Start difference. First operand 336 states and 416 transitions. Second operand has 44 states, 41 states have (on average 3.292682926829268) internal successors, (135), 41 states have internal predecessors, (135), 19 states have call successors, (37), 7 states have call predecessors, (37), 9 states have return successors, (33), 16 states have call predecessors, (33), 18 states have call successors, (33) [2024-11-24 01:08:56,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 01:09:01,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 01:09:09,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 01:09:12,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 01:09:23,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 01:09:29,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:09:29,041 INFO L93 Difference]: Finished difference Result 897 states and 1129 transitions. [2024-11-24 01:09:29,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-24 01:09:29,042 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 41 states have (on average 3.292682926829268) internal successors, (135), 41 states have internal predecessors, (135), 19 states have call successors, (37), 7 states have call predecessors, (37), 9 states have return successors, (33), 16 states have call predecessors, (33), 18 states have call successors, (33) Word has length 100 [2024-11-24 01:09:29,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:09:29,046 INFO L225 Difference]: With dead ends: 897 [2024-11-24 01:09:29,047 INFO L226 Difference]: Without dead ends: 677 [2024-11-24 01:09:29,050 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 306 SyntacticMatches, 12 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1923 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=877, Invalid=7495, Unknown=0, NotChecked=0, Total=8372 [2024-11-24 01:09:29,050 INFO L435 NwaCegarLoop]: 123 mSDtfsCounter, 492 mSDsluCounter, 2645 mSDsCounter, 0 mSdLazyCounter, 2358 mSolverCounterSat, 261 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 2768 SdHoareTripleChecker+Invalid, 2622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 2358 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.7s IncrementalHoareTripleChecker+Time [2024-11-24 01:09:29,051 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 2768 Invalid, 2622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 2358 Invalid, 3 Unknown, 0 Unchecked, 29.7s Time] [2024-11-24 01:09:29,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2024-11-24 01:09:29,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 579. [2024-11-24 01:09:29,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 430 states have (on average 1.213953488372093) internal successors, (522), 439 states have internal predecessors, (522), 94 states have call successors, (94), 45 states have call predecessors, (94), 54 states have return successors, (113), 94 states have call predecessors, (113), 90 states have call successors, (113) [2024-11-24 01:09:29,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 729 transitions. [2024-11-24 01:09:29,166 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 729 transitions. Word has length 100 [2024-11-24 01:09:29,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:09:29,166 INFO L471 AbstractCegarLoop]: Abstraction has 579 states and 729 transitions. [2024-11-24 01:09:29,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 41 states have (on average 3.292682926829268) internal successors, (135), 41 states have internal predecessors, (135), 19 states have call successors, (37), 7 states have call predecessors, (37), 9 states have return successors, (33), 16 states have call predecessors, (33), 18 states have call successors, (33) [2024-11-24 01:09:29,167 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 729 transitions. [2024-11-24 01:09:29,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-24 01:09:29,168 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:09:29,168 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:09:29,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2024-11-24 01:09:29,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-24 01:09:29,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:09:29,569 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:09:29,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:09:29,570 INFO L85 PathProgramCache]: Analyzing trace with hash 868451695, now seen corresponding path program 1 times [2024-11-24 01:09:29,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:09:29,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1154503581] [2024-11-24 01:09:29,570 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:09:29,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:09:29,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:09:29,574 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:09:29,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-24 01:09:29,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:09:29,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-24 01:09:29,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:09:30,153 INFO L349 Elim1Store]: treesize reduction 50, result has 41.2 percent of original size [2024-11-24 01:09:30,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 104 [2024-11-24 01:09:30,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2024-11-24 01:09:30,193 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-24 01:09:30,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2024-11-24 01:09:30,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 20 [2024-11-24 01:09:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-24 01:09:32,338 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:09:32,338 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:09:32,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154503581] [2024-11-24 01:09:32,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154503581] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:09:32,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:09:32,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-24 01:09:32,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202490458] [2024-11-24 01:09:32,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:09:32,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-24 01:09:32,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:09:32,339 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-24 01:09:32,340 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-11-24 01:09:32,340 INFO L87 Difference]: Start difference. First operand 579 states and 729 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-24 01:09:36,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 01:09:40,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 01:09:44,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 01:09:48,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 01:09:52,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:09:52,278 INFO L93 Difference]: Finished difference Result 759 states and 958 transitions. [2024-11-24 01:09:52,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-24 01:09:52,279 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 102 [2024-11-24 01:09:52,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:09:52,283 INFO L225 Difference]: With dead ends: 759 [2024-11-24 01:09:52,283 INFO L226 Difference]: Without dead ends: 585 [2024-11-24 01:09:52,284 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 79 SyntacticMatches, 12 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2024-11-24 01:09:52,285 INFO L435 NwaCegarLoop]: 192 mSDtfsCounter, 57 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 29 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.6s IncrementalHoareTripleChecker+Time [2024-11-24 01:09:52,285 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 1156 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 519 Invalid, 4 Unknown, 0 Unchecked, 19.6s Time] [2024-11-24 01:09:52,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2024-11-24 01:09:52,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 298. [2024-11-24 01:09:52,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 221 states have (on average 1.1990950226244343) internal successors, (265), 225 states have internal predecessors, (265), 48 states have call successors, (48), 24 states have call predecessors, (48), 28 states have return successors, (57), 48 states have call predecessors, (57), 46 states have call successors, (57) [2024-11-24 01:09:52,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 370 transitions. [2024-11-24 01:09:52,342 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 370 transitions. Word has length 102 [2024-11-24 01:09:52,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:09:52,343 INFO L471 AbstractCegarLoop]: Abstraction has 298 states and 370 transitions. [2024-11-24 01:09:52,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-24 01:09:52,343 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 370 transitions. [2024-11-24 01:09:52,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-24 01:09:52,344 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:09:52,344 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:09:52,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-24 01:09:52,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:09:52,545 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:09:52,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:09:52,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1367576257, now seen corresponding path program 1 times [2024-11-24 01:09:52,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:09:52,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136214063] [2024-11-24 01:09:52,546 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:09:52,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:09:52,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:09:52,548 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:09:52,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-24 01:09:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:09:52,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-24 01:09:52,765 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:09:53,331 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-24 01:09:53,331 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:09:53,332 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:09:53,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136214063] [2024-11-24 01:09:53,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136214063] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:09:53,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:09:53,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-24 01:09:53,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546394576] [2024-11-24 01:09:53,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:09:53,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-24 01:09:53,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:09:53,333 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-24 01:09:53,333 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-24 01:09:53,333 INFO L87 Difference]: Start difference. First operand 298 states and 370 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-24 01:09:55,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:09:55,055 INFO L93 Difference]: Finished difference Result 559 states and 731 transitions. [2024-11-24 01:09:55,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 01:09:55,056 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 110 [2024-11-24 01:09:55,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:09:55,059 INFO L225 Difference]: With dead ends: 559 [2024-11-24 01:09:55,059 INFO L226 Difference]: Without dead ends: 362 [2024-11-24 01:09:55,060 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-24 01:09:55,061 INFO L435 NwaCegarLoop]: 117 mSDtfsCounter, 15 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-24 01:09:55,061 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 713 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-24 01:09:55,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2024-11-24 01:09:55,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 319. [2024-11-24 01:09:55,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 239 states have (on average 1.205020920502092) internal successors, (288), 243 states have internal predecessors, (288), 48 states have call successors, (48), 24 states have call predecessors, (48), 31 states have return successors, (64), 51 states have call predecessors, (64), 46 states have call successors, (64) [2024-11-24 01:09:55,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 400 transitions. [2024-11-24 01:09:55,147 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 400 transitions. Word has length 110 [2024-11-24 01:09:55,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:09:55,148 INFO L471 AbstractCegarLoop]: Abstraction has 319 states and 400 transitions. [2024-11-24 01:09:55,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-24 01:09:55,148 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 400 transitions. [2024-11-24 01:09:55,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-24 01:09:55,149 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:09:55,149 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:09:55,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-24 01:09:55,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:09:55,350 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:09:55,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:09:55,351 INFO L85 PathProgramCache]: Analyzing trace with hash 571585789, now seen corresponding path program 1 times [2024-11-24 01:09:55,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:09:55,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771493889] [2024-11-24 01:09:55,351 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:09:55,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:09:55,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:09:55,354 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:09:55,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-24 01:09:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:09:55,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-24 01:09:55,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:09:55,614 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-24 01:09:55,614 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:09:55,614 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:09:55,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771493889] [2024-11-24 01:09:55,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771493889] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:09:55,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:09:55,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-24 01:09:55,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181098256] [2024-11-24 01:09:55,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:09:55,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 01:09:55,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:09:55,615 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 01:09:55,615 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 01:09:55,615 INFO L87 Difference]: Start difference. First operand 319 states and 400 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-24 01:09:55,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:09:55,728 INFO L93 Difference]: Finished difference Result 601 states and 777 transitions. [2024-11-24 01:09:55,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:09:55,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 110 [2024-11-24 01:09:55,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:09:55,731 INFO L225 Difference]: With dead ends: 601 [2024-11-24 01:09:55,731 INFO L226 Difference]: Without dead ends: 330 [2024-11-24 01:09:55,732 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 01:09:55,733 INFO L435 NwaCegarLoop]: 125 mSDtfsCounter, 0 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 01:09:55,733 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 489 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 01:09:55,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2024-11-24 01:09:55,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 328. [2024-11-24 01:09:55,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 246 states have (on average 1.1869918699186992) internal successors, (292), 249 states have internal predecessors, (292), 48 states have call successors, (48), 24 states have call predecessors, (48), 33 states have return successors, (73), 54 states have call predecessors, (73), 46 states have call successors, (73) [2024-11-24 01:09:55,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 413 transitions. [2024-11-24 01:09:55,812 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 413 transitions. Word has length 110 [2024-11-24 01:09:55,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:09:55,813 INFO L471 AbstractCegarLoop]: Abstraction has 328 states and 413 transitions. [2024-11-24 01:09:55,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-24 01:09:55,814 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 413 transitions. [2024-11-24 01:09:55,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-24 01:09:55,815 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:09:55,815 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:09:55,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-24 01:09:56,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:09:56,016 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:09:56,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:09:56,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1848656515, now seen corresponding path program 1 times [2024-11-24 01:09:56,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:09:56,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180422674] [2024-11-24 01:09:56,017 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:09:56,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:09:56,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:09:56,019 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:09:56,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-24 01:09:56,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:09:56,223 INFO L256 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-24 01:09:56,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:09:56,252 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-24 01:09:56,252 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:09:56,252 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:09:56,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180422674] [2024-11-24 01:09:56,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180422674] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:09:56,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:09:56,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:09:56,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643499415] [2024-11-24 01:09:56,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:09:56,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:09:56,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:09:56,253 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:09:56,253 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:09:56,253 INFO L87 Difference]: Start difference. First operand 328 states and 413 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-24 01:09:56,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:09:56,372 INFO L93 Difference]: Finished difference Result 589 states and 759 transitions. [2024-11-24 01:09:56,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:09:56,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 110 [2024-11-24 01:09:56,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:09:56,375 INFO L225 Difference]: With dead ends: 589 [2024-11-24 01:09:56,375 INFO L226 Difference]: Without dead ends: 311 [2024-11-24 01:09:56,376 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:09:56,377 INFO L435 NwaCegarLoop]: 120 mSDtfsCounter, 0 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 01:09:56,377 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 351 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 01:09:56,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2024-11-24 01:09:56,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2024-11-24 01:09:56,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 232 states have (on average 1.1594827586206897) internal successors, (269), 235 states have internal predecessors, (269), 48 states have call successors, (48), 24 states have call predecessors, (48), 30 states have return successors, (62), 51 states have call predecessors, (62), 46 states have call successors, (62) [2024-11-24 01:09:56,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 379 transitions. [2024-11-24 01:09:56,454 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 379 transitions. Word has length 110 [2024-11-24 01:09:56,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:09:56,454 INFO L471 AbstractCegarLoop]: Abstraction has 311 states and 379 transitions. [2024-11-24 01:09:56,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-24 01:09:56,455 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 379 transitions. [2024-11-24 01:09:56,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-24 01:09:56,457 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:09:56,457 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:09:56,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-24 01:09:56,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:09:56,657 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:09:56,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:09:56,658 INFO L85 PathProgramCache]: Analyzing trace with hash -313572735, now seen corresponding path program 2 times [2024-11-24 01:09:56,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:09:56,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [162562700] [2024-11-24 01:09:56,658 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:09:56,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:09:56,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:09:56,660 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:09:56,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-24 01:09:56,888 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:09:56,888 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:09:56,892 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-24 01:09:56,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:09:56,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 01:09:56,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 01:10:01,435 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_10| (_ BitVec 64)) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_10| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#2.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_10|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_10|)))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_10| (_ BitVec 64)) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_10| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#2.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_10|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_10|))))) is different from true [2024-11-24 01:10:05,681 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_11| (_ BitVec 64)) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_11| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#2.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_11|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_11|)))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_11| (_ BitVec 64)) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_11| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#2.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_11|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_11|))))) is different from true [2024-11-24 01:10:10,010 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((v_aws_linked_list_back_~list.base_BEFORE_CALL_51 (_ BitVec 64)) (v_aws_linked_list_back_~list.offset_BEFORE_CALL_51 (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#2.base| v_aws_linked_list_back_~list.base_BEFORE_CALL_51) v_aws_linked_list_back_~list.offset_BEFORE_CALL_51)))) (exists ((v_aws_linked_list_back_~list.base_BEFORE_CALL_51 (_ BitVec 64)) (v_aws_linked_list_back_~list.offset_BEFORE_CALL_51 (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#2.offset| v_aws_linked_list_back_~list.base_BEFORE_CALL_51) v_aws_linked_list_back_~list.offset_BEFORE_CALL_51))))) is different from true [2024-11-24 01:10:14,207 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((v_aws_linked_list_back_~list.base_BEFORE_CALL_52 (_ BitVec 64)) (v_aws_linked_list_back_~list.offset_BEFORE_CALL_52 (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#2.base| v_aws_linked_list_back_~list.base_BEFORE_CALL_52) v_aws_linked_list_back_~list.offset_BEFORE_CALL_52)))) (exists ((v_aws_linked_list_back_~list.base_BEFORE_CALL_52 (_ BitVec 64)) (v_aws_linked_list_back_~list.offset_BEFORE_CALL_52 (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#2.offset| v_aws_linked_list_back_~list.base_BEFORE_CALL_52) v_aws_linked_list_back_~list.offset_BEFORE_CALL_52))))) is different from true [2024-11-24 01:10:18,437 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((v_aws_linked_list_back_~list.base_BEFORE_CALL_53 (_ BitVec 64)) (v_aws_linked_list_back_~list.offset_BEFORE_CALL_53 (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#2.offset| v_aws_linked_list_back_~list.base_BEFORE_CALL_53) v_aws_linked_list_back_~list.offset_BEFORE_CALL_53)))) (exists ((v_aws_linked_list_back_~list.base_BEFORE_CALL_53 (_ BitVec 64)) (v_aws_linked_list_back_~list.offset_BEFORE_CALL_53 (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#2.base| v_aws_linked_list_back_~list.base_BEFORE_CALL_53) v_aws_linked_list_back_~list.offset_BEFORE_CALL_53))))) is different from true [2024-11-24 01:10:22,626 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((v_aws_linked_list_back_~list.offset_BEFORE_CALL_54 (_ BitVec 64)) (v_aws_linked_list_back_~list.base_BEFORE_CALL_54 (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$#2.base| v_aws_linked_list_back_~list.base_BEFORE_CALL_54) v_aws_linked_list_back_~list.offset_BEFORE_CALL_54) (_ bv0 64)))) (exists ((v_aws_linked_list_back_~list.offset_BEFORE_CALL_54 (_ BitVec 64)) (v_aws_linked_list_back_~list.base_BEFORE_CALL_54 (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#2.offset| v_aws_linked_list_back_~list.base_BEFORE_CALL_54) v_aws_linked_list_back_~list.offset_BEFORE_CALL_54))))) is different from true [2024-11-24 01:10:28,161 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 19 not checked. [2024-11-24 01:10:28,162 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:10:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-24 01:10:34,018 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:10:34,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162562700] [2024-11-24 01:10:34,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162562700] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:10:34,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:10:34,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 25 [2024-11-24 01:10:34,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629475894] [2024-11-24 01:10:34,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:10:34,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-24 01:10:34,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:10:34,020 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-24 01:10:34,021 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=286, Unknown=8, NotChecked=234, Total=600 [2024-11-24 01:10:34,021 INFO L87 Difference]: Start difference. First operand 311 states and 379 transitions. Second operand has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 6 states have call successors, (22), 8 states have call predecessors, (22), 9 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2024-11-24 01:10:38,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 01:10:47,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 01:11:00,614 WARN L873 $PredicateComparison]: unable to prove that (and (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_10| (_ BitVec 64)) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_10| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#2.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_10|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_10|)))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_10| (_ BitVec 64)) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_10| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#2.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_10|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_10|))))) (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_11| (_ BitVec 64)) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_11| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#2.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_11|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_11|)))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_11| (_ BitVec 64)) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_11| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#2.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_11|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_11|)))))) is different from true [2024-11-24 01:11:08,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:11:08,171 INFO L93 Difference]: Finished difference Result 503 states and 604 transitions. [2024-11-24 01:11:08,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-24 01:11:08,172 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 6 states have call successors, (22), 8 states have call predecessors, (22), 9 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) Word has length 111 [2024-11-24 01:11:08,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:11:08,175 INFO L225 Difference]: With dead ends: 503 [2024-11-24 01:11:08,175 INFO L226 Difference]: Without dead ends: 375 [2024-11-24 01:11:08,176 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 192 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 58.8s TimeCoverageRelationStatistics Valid=168, Invalid=603, Unknown=13, NotChecked=406, Total=1190 [2024-11-24 01:11:08,176 INFO L435 NwaCegarLoop]: 124 mSDtfsCounter, 87 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 1762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 1432 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2024-11-24 01:11:08,177 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 743 Invalid, 1762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 319 Invalid, 2 Unknown, 1432 Unchecked, 9.8s Time] [2024-11-24 01:11:08,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2024-11-24 01:11:08,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 343. [2024-11-24 01:11:08,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 258 states have (on average 1.1589147286821706) internal successors, (299), 261 states have internal predecessors, (299), 48 states have call successors, (48), 30 states have call predecessors, (48), 36 states have return successors, (62), 51 states have call predecessors, (62), 46 states have call successors, (62) [2024-11-24 01:11:08,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 409 transitions. [2024-11-24 01:11:08,258 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 409 transitions. Word has length 111 [2024-11-24 01:11:08,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:11:08,258 INFO L471 AbstractCegarLoop]: Abstraction has 343 states and 409 transitions. [2024-11-24 01:11:08,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 6 states have call successors, (22), 8 states have call predecessors, (22), 9 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2024-11-24 01:11:08,259 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 409 transitions. [2024-11-24 01:11:08,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-24 01:11:08,260 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:11:08,260 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:11:08,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-24 01:11:08,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:11:08,461 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:11:08,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:11:08,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1324689985, now seen corresponding path program 1 times [2024-11-24 01:11:08,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:11:08,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135156685] [2024-11-24 01:11:08,462 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:11:08,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:11:08,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:11:08,464 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:11:08,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-24 01:11:08,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:11:08,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-24 01:11:08,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:11:08,925 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-24 01:11:08,926 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:11:08,926 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:11:08,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135156685] [2024-11-24 01:11:08,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135156685] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:11:08,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:11:08,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-24 01:11:08,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411448372] [2024-11-24 01:11:08,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:11:08,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 01:11:08,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:11:08,927 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 01:11:08,927 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-24 01:11:08,928 INFO L87 Difference]: Start difference. First operand 343 states and 409 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 6 states have internal predecessors, (55), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-24 01:11:09,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:11:09,169 INFO L93 Difference]: Finished difference Result 709 states and 864 transitions. [2024-11-24 01:11:09,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 01:11:09,170 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 6 states have internal predecessors, (55), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2024-11-24 01:11:09,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:11:09,173 INFO L225 Difference]: With dead ends: 709 [2024-11-24 01:11:09,173 INFO L226 Difference]: Without dead ends: 334 [2024-11-24 01:11:09,174 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-24 01:11:09,175 INFO L435 NwaCegarLoop]: 126 mSDtfsCounter, 41 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 01:11:09,175 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 559 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 01:11:09,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2024-11-24 01:11:09,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 334. [2024-11-24 01:11:09,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 250 states have (on average 1.144) internal successors, (286), 252 states have internal predecessors, (286), 48 states have call successors, (48), 30 states have call predecessors, (48), 35 states have return successors, (61), 51 states have call predecessors, (61), 46 states have call successors, (61) [2024-11-24 01:11:09,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 395 transitions. [2024-11-24 01:11:09,259 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 395 transitions. Word has length 111 [2024-11-24 01:11:09,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:11:09,259 INFO L471 AbstractCegarLoop]: Abstraction has 334 states and 395 transitions. [2024-11-24 01:11:09,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 6 states have internal predecessors, (55), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-24 01:11:09,260 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 395 transitions. [2024-11-24 01:11:09,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-24 01:11:09,261 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:11:09,261 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:11:09,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-24 01:11:09,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:11:09,462 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:11:09,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:11:09,463 INFO L85 PathProgramCache]: Analyzing trace with hash -574503401, now seen corresponding path program 1 times [2024-11-24 01:11:09,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:11:09,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067625267] [2024-11-24 01:11:09,463 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:11:09,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:11:09,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:11:09,465 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:11:09,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-24 01:11:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:11:09,702 INFO L256 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-24 01:11:09,706 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:11:09,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-24 01:11:09,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-24 01:11:12,283 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 55 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-24 01:11:12,283 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:11:15,406 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 19 proven. 20 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-24 01:11:15,406 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:11:15,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067625267] [2024-11-24 01:11:15,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067625267] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:11:15,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:11:15,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 27 [2024-11-24 01:11:15,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033400685] [2024-11-24 01:11:15,407 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:11:15,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-24 01:11:15,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:11:15,408 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-24 01:11:15,409 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2024-11-24 01:11:15,409 INFO L87 Difference]: Start difference. First operand 334 states and 395 transitions. Second operand has 27 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 13 states have call successors, (28), 4 states have call predecessors, (28), 7 states have return successors, (25), 12 states have call predecessors, (25), 13 states have call successors, (25) [2024-11-24 01:11:24,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:11:24,055 INFO L93 Difference]: Finished difference Result 448 states and 540 transitions. [2024-11-24 01:11:24,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-24 01:11:24,056 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 13 states have call successors, (28), 4 states have call predecessors, (28), 7 states have return successors, (25), 12 states have call predecessors, (25), 13 states have call successors, (25) Word has length 113 [2024-11-24 01:11:24,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:11:24,058 INFO L225 Difference]: With dead ends: 448 [2024-11-24 01:11:24,058 INFO L226 Difference]: Without dead ends: 310 [2024-11-24 01:11:24,060 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 202 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2024-11-24 01:11:24,061 INFO L435 NwaCegarLoop]: 158 mSDtfsCounter, 117 mSDsluCounter, 2133 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 2291 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2024-11-24 01:11:24,062 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 2291 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1371 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2024-11-24 01:11:24,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2024-11-24 01:11:24,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 275. [2024-11-24 01:11:24,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 205 states have (on average 1.146341463414634) internal successors, (235), 207 states have internal predecessors, (235), 41 states have call successors, (41), 24 states have call predecessors, (41), 28 states have return successors, (50), 43 states have call predecessors, (50), 39 states have call successors, (50) [2024-11-24 01:11:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 326 transitions. [2024-11-24 01:11:24,142 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 326 transitions. Word has length 113 [2024-11-24 01:11:24,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:11:24,142 INFO L471 AbstractCegarLoop]: Abstraction has 275 states and 326 transitions. [2024-11-24 01:11:24,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 13 states have call successors, (28), 4 states have call predecessors, (28), 7 states have return successors, (25), 12 states have call predecessors, (25), 13 states have call successors, (25) [2024-11-24 01:11:24,143 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 326 transitions. [2024-11-24 01:11:24,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-24 01:11:24,144 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:11:24,144 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:11:24,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-24 01:11:24,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:11:24,345 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:11:24,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:11:24,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1241443813, now seen corresponding path program 2 times [2024-11-24 01:11:24,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:11:24,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1944061056] [2024-11-24 01:11:24,347 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:11:24,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:11:24,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:11:24,349 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:11:24,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-24 01:11:24,632 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:11:24,632 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:11:24,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-24 01:11:24,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:11:24,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2024-11-24 01:11:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 92 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-24 01:11:28,720 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:11:29,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2024-11-24 01:11:29,745 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:11:29,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944061056] [2024-11-24 01:11:29,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944061056] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:11:29,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1030313463] [2024-11-24 01:11:29,745 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:11:29,745 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-24 01:11:29,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/cvc4 [2024-11-24 01:11:29,747 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-24 01:11:29,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2024-11-24 01:11:30,497 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:11:30,497 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:11:30,503 INFO L256 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-24 01:11:30,508 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:11:30,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2024-11-24 01:11:31,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2024-11-24 01:11:31,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 28 [2024-11-24 01:11:38,706 INFO L349 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2024-11-24 01:11:38,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 1 [2024-11-24 01:11:38,708 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 86 proven. 8 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-24 01:11:38,708 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:11:39,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1030313463] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:11:39,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:11:39,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2024-11-24 01:11:39,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259242007] [2024-11-24 01:11:39,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:11:39,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-24 01:11:39,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:11:39,626 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-24 01:11:39,627 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2024-11-24 01:11:39,627 INFO L87 Difference]: Start difference. First operand 275 states and 326 transitions. Second operand has 30 states, 28 states have (on average 4.5) internal successors, (126), 27 states have internal predecessors, (126), 13 states have call successors, (25), 6 states have call predecessors, (25), 7 states have return successors, (22), 11 states have call predecessors, (22), 13 states have call successors, (22) [2024-11-24 01:11:54,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:11:54,636 INFO L93 Difference]: Finished difference Result 792 states and 964 transitions. [2024-11-24 01:11:54,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-24 01:11:54,637 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 4.5) internal successors, (126), 27 states have internal predecessors, (126), 13 states have call successors, (25), 6 states have call predecessors, (25), 7 states have return successors, (22), 11 states have call predecessors, (22), 13 states have call successors, (22) Word has length 124 [2024-11-24 01:11:54,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:11:54,639 INFO L225 Difference]: With dead ends: 792 [2024-11-24 01:11:54,639 INFO L226 Difference]: Without dead ends: 575 [2024-11-24 01:11:54,641 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 312 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=192, Invalid=1614, Unknown=0, NotChecked=0, Total=1806 [2024-11-24 01:11:54,641 INFO L435 NwaCegarLoop]: 151 mSDtfsCounter, 171 mSDsluCounter, 1215 mSDsCounter, 0 mSdLazyCounter, 1332 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1366 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2024-11-24 01:11:54,642 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 1366 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1332 Invalid, 0 Unknown, 0 Unchecked, 12.2s Time] [2024-11-24 01:11:54,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2024-11-24 01:11:54,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 550. [2024-11-24 01:11:54,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 411 states have (on average 1.1557177615571776) internal successors, (475), 415 states have internal predecessors, (475), 84 states have call successors, (84), 46 states have call predecessors, (84), 54 states have return successors, (105), 88 states have call predecessors, (105), 80 states have call successors, (105) [2024-11-24 01:11:54,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 664 transitions. [2024-11-24 01:11:54,805 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 664 transitions. Word has length 124 [2024-11-24 01:11:54,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:11:54,805 INFO L471 AbstractCegarLoop]: Abstraction has 550 states and 664 transitions. [2024-11-24 01:11:54,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 4.5) internal successors, (126), 27 states have internal predecessors, (126), 13 states have call successors, (25), 6 states have call predecessors, (25), 7 states have return successors, (22), 11 states have call predecessors, (22), 13 states have call successors, (22) [2024-11-24 01:11:54,806 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 664 transitions. [2024-11-24 01:11:54,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-11-24 01:11:54,807 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:11:54,807 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:11:54,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-24 01:11:55,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2024-11-24 01:11:55,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt [2024-11-24 01:11:55,208 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:11:55,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:11:55,209 INFO L85 PathProgramCache]: Analyzing trace with hash -323335359, now seen corresponding path program 1 times [2024-11-24 01:11:55,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:11:55,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [523571399] [2024-11-24 01:11:55,209 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:11:55,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:11:55,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:11:55,211 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:11:55,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f368beec-78ba-48e5-8b66-019da9ceeb05/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-24 01:11:55,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:11:55,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-11-24 01:11:55,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:11:55,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 01:11:55,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 8 [2024-11-24 01:11:55,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-24 01:11:55,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 01:11:55,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2024-11-24 01:11:55,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 01:11:55,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1