./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB --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 6a8b3323a92d99d7113afe189cb74ca3fccfd0743fd857bf4a57e73eb6656833 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:02:15,058 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:02:15,155 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-64bit-Automizer_Default.epf [2024-11-28 04:02:15,165 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:02:15,166 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:02:15,195 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:02:15,195 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:02:15,196 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:02:15,196 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:02:15,196 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:02:15,196 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:02:15,196 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:02:15,197 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:02:15,197 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:02:15,197 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:02:15,197 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:02:15,197 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 04:02:15,198 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:02:15,198 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:02:15,198 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 04:02:15,198 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:02:15,198 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 04:02:15,198 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 04:02:15,199 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:02:15,199 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:02:15,199 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:02:15,199 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:02:15,199 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:02:15,199 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:02:15,199 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:02:15,199 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:02:15,199 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:02:15,200 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:02:15,200 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:02:15,200 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:02:15,200 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:02:15,200 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:02:15,200 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 04:02:15,200 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 04:02:15,200 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:02:15,200 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:02:15,200 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:02:15,200 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:02:15,201 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:02:15,201 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:02:15,201 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_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 6a8b3323a92d99d7113afe189cb74ca3fccfd0743fd857bf4a57e73eb6656833 [2024-11-28 04:02:15,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:02:15,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:02:15,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:02:15,479 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:02:15,479 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:02:15,480 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i [2024-11-28 04:02:18,390 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/data/8cb1b8bb6/a781514926f8434a83b5edd1ff6fc67a/FLAGe7334daec [2024-11-28 04:02:19,002 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:02:19,004 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i [2024-11-28 04:02:19,055 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/data/8cb1b8bb6/a781514926f8434a83b5edd1ff6fc67a/FLAGe7334daec [2024-11-28 04:02:19,449 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/data/8cb1b8bb6/a781514926f8434a83b5edd1ff6fc67a [2024-11-28 04:02:19,452 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:02:19,453 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:02:19,454 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:02:19,455 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:02:19,459 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:02:19,460 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:02:19" (1/1) ... [2024-11-28 04:02:19,461 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6af83dd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:19, skipping insertion in model container [2024-11-28 04:02:19,461 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:02:19" (1/1) ... [2024-11-28 04:02:19,551 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:02:19,807 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_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4500,4513] [2024-11-28 04:02:19,816 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_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4560,4573] [2024-11-28 04:02:20,692 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:02:20,693 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:02:20,694 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:02:20,694 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:02:20,696 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:02:20,712 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:02:20,712 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:02:20,715 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:02:20,715 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:02:20,717 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:02:20,719 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:02:20,719 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:02:20,720 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:02:21,317 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_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[150301,150314] [2024-11-28 04:02:21,318 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:02:21,334 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:02:21,348 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_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4500,4513] [2024-11-28 04:02:21,348 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_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4560,4573] [2024-11-28 04:02:21,440 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:02:21,440 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:02:21,441 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:02:21,441 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:02:21,442 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:02:21,461 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:02:21,462 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:02:21,463 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:02:21,463 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:02:21,466 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:02:21,467 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:02:21,468 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:02:21,469 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:02:21,632 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_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[150301,150314] [2024-11-28 04:02:21,632 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:02:21,785 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:02:21,786 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:21 WrapperNode [2024-11-28 04:02:21,786 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:02:21,787 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:02:21,787 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:02:21,788 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:02:21,794 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:21" (1/1) ... [2024-11-28 04:02:21,849 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:21" (1/1) ... [2024-11-28 04:02:21,889 INFO L138 Inliner]: procedures = 668, calls = 1032, calls flagged for inlining = 49, calls inlined = 3, statements flattened = 27 [2024-11-28 04:02:21,889 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:02:21,890 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:02:21,890 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:02:21,890 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:02:21,900 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:21" (1/1) ... [2024-11-28 04:02:21,900 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:21" (1/1) ... [2024-11-28 04:02:21,904 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:21" (1/1) ... [2024-11-28 04:02:21,929 INFO L175 MemorySlicer]: Split 9 memory accesses to 3 slices as follows [2, 5, 2]. 56 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 1 writes are split as follows [0, 0, 1]. [2024-11-28 04:02:21,930 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:21" (1/1) ... [2024-11-28 04:02:21,930 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:21" (1/1) ... [2024-11-28 04:02:21,949 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:21" (1/1) ... [2024-11-28 04:02:21,950 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:21" (1/1) ... [2024-11-28 04:02:21,956 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:21" (1/1) ... [2024-11-28 04:02:21,962 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:21" (1/1) ... [2024-11-28 04:02:21,963 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:21" (1/1) ... [2024-11-28 04:02:21,971 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:02:21,975 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:02:21,975 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:02:21,976 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:02:21,976 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:21" (1/1) ... [2024-11-28 04:02:21,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:02:22,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:02:22,014 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:02:22,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:02:22,046 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_reset [2024-11-28 04:02:22,050 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_reset [2024-11-28 04:02:22,050 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2024-11-28 04:02:22,050 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2024-11-28 04:02:22,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 04:02:22,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 04:02:22,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 04:02:22,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-28 04:02:22,051 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-28 04:02:22,051 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-28 04:02:22,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:02:22,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:02:22,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:02:22,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2024-11-28 04:02:22,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2024-11-28 04:02:22,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2024-11-28 04:02:22,051 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2024-11-28 04:02:22,052 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2024-11-28 04:02:22,053 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2024-11-28 04:02:22,054 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-28 04:02:22,054 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-28 04:02:22,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 04:02:22,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-28 04:02:22,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-28 04:02:22,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-28 04:02:22,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:02:22,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 04:02:22,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-28 04:02:22,282 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:02:22,285 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:02:22,468 INFO L? ?]: Removed 20 outVars from TransFormulas that were not future-live. [2024-11-28 04:02:22,468 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:02:22,478 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:02:22,478 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-28 04:02:22,479 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:02:22 BoogieIcfgContainer [2024-11-28 04:02:22,479 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:02:22,481 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:02:22,481 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:02:22,502 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:02:22,502 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:02:19" (1/3) ... [2024-11-28 04:02:22,503 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f40298e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:02:22, skipping insertion in model container [2024-11-28 04:02:22,503 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:21" (2/3) ... [2024-11-28 04:02:22,503 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f40298e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:02:22, skipping insertion in model container [2024-11-28 04:02:22,503 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:02:22" (3/3) ... [2024-11-28 04:02:22,505 INFO L128 eAbstractionObserver]: Analyzing ICFG aws_linked_list_node_reset_harness-1.i [2024-11-28 04:02:22,518 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:02:22,520 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG aws_linked_list_node_reset_harness-1.i that has 8 procedures, 49 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2024-11-28 04:02:22,580 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:02:22,591 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;@b9c26b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:02:22,591 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 04:02:22,595 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 04:02:22,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-28 04:02:22,601 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:02:22,602 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:02:22,602 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:02:22,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:02:22,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1820655177, now seen corresponding path program 1 times [2024-11-28 04:02:22,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:02:22,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563130280] [2024-11-28 04:02:22,615 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:02:22,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:02:22,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:02:22,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:02:22,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:02:22,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563130280] [2024-11-28 04:02:22,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563130280] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:02:22,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:02:22,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:02:22,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353798774] [2024-11-28 04:02:22,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:02:22,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 04:02:22,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:02:22,915 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 04:02:22,915 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:02:22,917 INFO L87 Difference]: Start difference. First operand has 41 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:02:22,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:02:22,942 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2024-11-28 04:02:22,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 04:02:22,945 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2024-11-28 04:02:22,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:02:22,951 INFO L225 Difference]: With dead ends: 75 [2024-11-28 04:02:22,951 INFO L226 Difference]: Without dead ends: 36 [2024-11-28 04:02:22,957 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:02:22,960 INFO L435 NwaCegarLoop]: 45 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, 45 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 [2024-11-28 04:02:22,963 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:02:22,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-28 04:02:22,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-28 04:02:22,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 04:02:23,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2024-11-28 04:02:23,006 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 20 [2024-11-28 04:02:23,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:02:23,007 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2024-11-28 04:02:23,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:02:23,008 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2024-11-28 04:02:23,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-28 04:02:23,010 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:02:23,010 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:02:23,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 04:02:23,011 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:02:23,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:02:23,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1657671440, now seen corresponding path program 1 times [2024-11-28 04:02:23,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:02:23,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945478445] [2024-11-28 04:02:23,013 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:02:23,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:02:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:02:23,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:02:23,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:02:23,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945478445] [2024-11-28 04:02:23,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945478445] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:02:23,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:02:23,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 04:02:23,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685832163] [2024-11-28 04:02:23,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:02:23,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:02:23,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:02:23,677 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:02:23,678 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:02:23,678 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:02:23,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:02:23,741 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2024-11-28 04:02:23,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:02:23,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2024-11-28 04:02:23,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:02:23,744 INFO L225 Difference]: With dead ends: 46 [2024-11-28 04:02:23,744 INFO L226 Difference]: Without dead ends: 44 [2024-11-28 04:02:23,744 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:02:23,745 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 3 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:02:23,746 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 181 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:02:23,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-28 04:02:23,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2024-11-28 04:02:23,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 29 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-28 04:02:23,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2024-11-28 04:02:23,760 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 26 [2024-11-28 04:02:23,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:02:23,760 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2024-11-28 04:02:23,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:02:23,760 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2024-11-28 04:02:23,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-28 04:02:23,761 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:02:23,761 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:02:23,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 04:02:23,761 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:02:23,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:02:23,762 INFO L85 PathProgramCache]: Analyzing trace with hash -170168867, now seen corresponding path program 1 times [2024-11-28 04:02:23,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:02:23,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996614269] [2024-11-28 04:02:23,762 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:02:23,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:02:23,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:02:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:02:24,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:02:24,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996614269] [2024-11-28 04:02:24,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996614269] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:02:24,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:02:24,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:02:24,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833262491] [2024-11-28 04:02:24,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:02:24,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:02:24,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:02:24,051 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:02:24,051 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:02:24,051 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:02:24,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:02:24,079 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2024-11-28 04:02:24,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:02:24,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2024-11-28 04:02:24,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:02:24,081 INFO L225 Difference]: With dead ends: 75 [2024-11-28 04:02:24,082 INFO L226 Difference]: Without dead ends: 44 [2024-11-28 04:02:24,082 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:02:24,083 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:02:24,084 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:02:24,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-28 04:02:24,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-11-28 04:02:24,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-28 04:02:24,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2024-11-28 04:02:24,097 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 27 [2024-11-28 04:02:24,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:02:24,098 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2024-11-28 04:02:24,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:02:24,098 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2024-11-28 04:02:24,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-28 04:02:24,099 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:02:24,099 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:02:24,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 04:02:24,100 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:02:24,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:02:24,100 INFO L85 PathProgramCache]: Analyzing trace with hash 293848357, now seen corresponding path program 1 times [2024-11-28 04:02:24,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:02:24,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877062652] [2024-11-28 04:02:24,101 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:02:24,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:02:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:02:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:02:24,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:02:24,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877062652] [2024-11-28 04:02:24,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877062652] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:02:24,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203053099] [2024-11-28 04:02:24,496 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:02:24,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:02:24,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:02:24,502 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:02:24,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:02:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:02:24,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-28 04:02:24,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:02:24,875 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 11 treesize of output 7 [2024-11-28 04:02:25,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:02:25,398 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:02:26,153 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 14 treesize of output 12 [2024-11-28 04:02:26,159 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 16 treesize of output 14 [2024-11-28 04:02:26,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:02:26,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203053099] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:02:26,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:02:26,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 15, 10] total 25 [2024-11-28 04:02:26,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183269952] [2024-11-28 04:02:26,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:02:26,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 04:02:26,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:02:26,259 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 04:02:26,262 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2024-11-28 04:02:26,262 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 25 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 04:02:27,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:02:27,334 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2024-11-28 04:02:27,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 04:02:27,335 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 28 [2024-11-28 04:02:27,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:02:27,336 INFO L225 Difference]: With dead ends: 81 [2024-11-28 04:02:27,336 INFO L226 Difference]: Without dead ends: 50 [2024-11-28 04:02:27,337 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=163, Invalid=1397, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 04:02:27,338 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 64 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:02:27,338 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 340 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 04:02:27,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-28 04:02:27,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-11-28 04:02:27,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 36 states have internal predecessors, (39), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-28 04:02:27,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2024-11-28 04:02:27,350 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 28 [2024-11-28 04:02:27,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:02:27,350 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2024-11-28 04:02:27,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 04:02:27,350 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2024-11-28 04:02:27,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-28 04:02:27,351 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:02:27,351 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-28 04:02:27,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 04:02:27,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:02:27,555 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:02:27,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:02:27,555 INFO L85 PathProgramCache]: Analyzing trace with hash 945471621, now seen corresponding path program 1 times [2024-11-28 04:02:27,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:02:27,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456293736] [2024-11-28 04:02:27,556 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:02:27,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:02:27,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:02:27,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:02:27,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:02:27,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456293736] [2024-11-28 04:02:27,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456293736] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:02:27,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778222337] [2024-11-28 04:02:27,953 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:02:27,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:02:27,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:02:27,955 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:02:27,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:02:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:02:28,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-28 04:02:28,085 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:02:28,176 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 11 treesize of output 7 [2024-11-28 04:02:28,208 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 21 treesize of output 20 [2024-11-28 04:02:28,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:02:28,825 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:02:29,764 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 22 treesize of output 20 [2024-11-28 04:02:29,769 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 27 treesize of output 23 [2024-11-28 04:02:29,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:02:29,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778222337] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:02:29,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:02:29,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 18, 13] total 32 [2024-11-28 04:02:29,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656224559] [2024-11-28 04:02:29,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:02:29,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 04:02:29,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:02:29,858 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 04:02:29,860 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2024-11-28 04:02:29,861 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 32 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 04:02:31,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:02:31,197 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2024-11-28 04:02:31,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 04:02:31,198 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 32 [2024-11-28 04:02:31,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:02:31,199 INFO L225 Difference]: With dead ends: 92 [2024-11-28 04:02:31,199 INFO L226 Difference]: Without dead ends: 56 [2024-11-28 04:02:31,201 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=215, Invalid=2137, Unknown=0, NotChecked=0, Total=2352 [2024-11-28 04:02:31,202 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 78 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:02:31,202 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 413 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 04:02:31,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-28 04:02:31,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2024-11-28 04:02:31,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 40 states have internal predecessors, (45), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-28 04:02:31,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2024-11-28 04:02:31,221 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 32 [2024-11-28 04:02:31,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:02:31,222 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2024-11-28 04:02:31,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 04:02:31,224 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2024-11-28 04:02:31,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 04:02:31,225 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:02:31,225 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2024-11-28 04:02:31,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 04:02:31,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:02:31,425 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:02:31,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:02:31,426 INFO L85 PathProgramCache]: Analyzing trace with hash 521053477, now seen corresponding path program 2 times [2024-11-28 04:02:31,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:02:31,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165343190] [2024-11-28 04:02:31,426 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:02:31,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:02:31,473 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:02:31,473 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:02:31,823 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:02:31,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:02:31,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165343190] [2024-11-28 04:02:31,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165343190] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:02:31,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000980764] [2024-11-28 04:02:31,824 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:02:31,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:02:31,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:02:31,826 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:02:31,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:02:31,978 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:02:31,978 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:02:31,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-28 04:02:31,984 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:02:32,097 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 11 treesize of output 7 [2024-11-28 04:02:32,132 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 21 treesize of output 20 [2024-11-28 04:02:32,182 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:02:32,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 32 [2024-11-28 04:02:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:02:33,234 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:02:34,885 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 28 treesize of output 26 [2024-11-28 04:02:34,890 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 36 treesize of output 32 [2024-11-28 04:02:34,988 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:02:34,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000980764] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:02:34,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:02:34,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 21, 16] total 39 [2024-11-28 04:02:34,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846566134] [2024-11-28 04:02:34,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:02:34,989 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-28 04:02:34,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:02:34,990 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-28 04:02:34,990 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 04:02:34,991 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 39 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 7 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 04:02:37,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:02:37,648 INFO L93 Difference]: Finished difference Result 105 states and 127 transitions. [2024-11-28 04:02:37,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 04:02:37,648 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 7 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 36 [2024-11-28 04:02:37,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:02:37,650 INFO L225 Difference]: With dead ends: 105 [2024-11-28 04:02:37,650 INFO L226 Difference]: Without dead ends: 66 [2024-11-28 04:02:37,652 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=319, Invalid=3713, Unknown=0, NotChecked=0, Total=4032 [2024-11-28 04:02:37,653 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 129 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:02:37,653 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 497 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 04:02:37,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-28 04:02:37,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2024-11-28 04:02:37,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 44 states have internal predecessors, (51), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-28 04:02:37,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2024-11-28 04:02:37,668 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 36 [2024-11-28 04:02:37,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:02:37,668 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2024-11-28 04:02:37,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 7 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 04:02:37,669 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2024-11-28 04:02:37,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-28 04:02:37,670 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:02:37,670 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:02:37,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 04:02:37,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:02:37,874 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:02:37,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:02:37,875 INFO L85 PathProgramCache]: Analyzing trace with hash -763357051, now seen corresponding path program 3 times [2024-11-28 04:02:37,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:02:37,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401995594] [2024-11-28 04:02:37,875 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:02:37,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:02:37,968 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 04:02:37,968 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:02:38,312 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:02:38,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:02:38,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401995594] [2024-11-28 04:02:38,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401995594] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:02:38,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766263765] [2024-11-28 04:02:38,312 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:02:38,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:02:38,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:02:38,316 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:02:38,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:02:38,669 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 04:02:38,669 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:02:38,674 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 04:02:38,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:02:38,718 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:02:38,720 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:02:38,904 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:02:38,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766263765] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:02:38,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:02:38,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-11-28 04:02:38,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250166077] [2024-11-28 04:02:38,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:02:38,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 04:02:38,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:02:38,905 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 04:02:38,906 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:02:38,906 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 04:02:39,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:02:39,240 INFO L93 Difference]: Finished difference Result 108 states and 135 transitions. [2024-11-28 04:02:39,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 04:02:39,241 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2024-11-28 04:02:39,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:02:39,242 INFO L225 Difference]: With dead ends: 108 [2024-11-28 04:02:39,242 INFO L226 Difference]: Without dead ends: 64 [2024-11-28 04:02:39,243 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2024-11-28 04:02:39,244 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:02:39,244 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 263 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:02:39,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-28 04:02:39,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-11-28 04:02:39,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 50 states have internal predecessors, (57), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-28 04:02:39,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2024-11-28 04:02:39,260 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 40 [2024-11-28 04:02:39,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:02:39,261 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2024-11-28 04:02:39,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 04:02:39,261 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2024-11-28 04:02:39,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-28 04:02:39,262 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:02:39,262 INFO L218 NwaCegarLoop]: trace histogram [10, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:02:39,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 04:02:39,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:02:39,466 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:02:39,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:02:39,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1507982725, now seen corresponding path program 4 times [2024-11-28 04:02:39,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:02:39,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675204090] [2024-11-28 04:02:39,467 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:02:39,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:02:39,535 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:02:39,536 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:02:40,185 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:02:40,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:02:40,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675204090] [2024-11-28 04:02:40,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675204090] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:02:40,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859461332] [2024-11-28 04:02:40,186 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:02:40,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:02:40,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:02:40,188 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:02:40,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:02:40,532 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:02:40,532 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:02:40,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-11-28 04:02:40,543 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:02:40,694 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 11 treesize of output 7 [2024-11-28 04:02:40,731 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 21 treesize of output 20 [2024-11-28 04:02:40,786 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:02:40,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 32 [2024-11-28 04:02:40,849 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:02:40,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 39 treesize of output 44 [2024-11-28 04:02:40,938 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:02:40,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2024-11-28 04:02:41,033 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:02:41,033 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2024-11-28 04:02:41,135 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:02:41,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2024-11-28 04:02:41,247 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:02:41,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2024-11-28 04:02:41,385 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:02:41,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2024-11-28 04:02:41,508 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:02:41,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 99 treesize of output 107 [2024-11-28 04:02:43,655 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:02:43,656 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:02:49,556 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 70 treesize of output 68 [2024-11-28 04:02:49,563 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 23569 treesize of output 23561 [2024-11-28 04:02:49,744 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:02:49,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859461332] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:02:49,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:02:49,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 28, 23] total 60 [2024-11-28 04:02:49,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901462650] [2024-11-28 04:02:49,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:02:49,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-28 04:02:49,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:02:49,746 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-28 04:02:49,747 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=3234, Unknown=0, NotChecked=0, Total=3540 [2024-11-28 04:02:49,747 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 60 states, 58 states have (on average 1.6379310344827587) internal successors, (95), 57 states have internal predecessors, (95), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 04:02:54,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:02:54,431 INFO L93 Difference]: Finished difference Result 116 states and 141 transitions. [2024-11-28 04:02:54,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-28 04:02:54,432 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 58 states have (on average 1.6379310344827587) internal successors, (95), 57 states have internal predecessors, (95), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 46 [2024-11-28 04:02:54,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:02:54,433 INFO L225 Difference]: With dead ends: 116 [2024-11-28 04:02:54,433 INFO L226 Difference]: Without dead ends: 74 [2024-11-28 04:02:54,435 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=616, Invalid=7040, Unknown=0, NotChecked=0, Total=7656 [2024-11-28 04:02:54,436 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 98 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 1795 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 1828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:02:54,436 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 992 Invalid, 1828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1795 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-28 04:02:54,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-28 04:02:54,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2024-11-28 04:02:54,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 54 states have internal predecessors, (63), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-28 04:02:54,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2024-11-28 04:02:54,476 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 46 [2024-11-28 04:02:54,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:02:54,476 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2024-11-28 04:02:54,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 58 states have (on average 1.6379310344827587) internal successors, (95), 57 states have internal predecessors, (95), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 04:02:54,476 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2024-11-28 04:02:54,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-28 04:02:54,477 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:02:54,478 INFO L218 NwaCegarLoop]: trace histogram [11, 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] [2024-11-28 04:02:54,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 04:02:54,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:02:54,678 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:02:54,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:02:54,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1483047763, now seen corresponding path program 1 times [2024-11-28 04:02:54,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:02:54,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294977338] [2024-11-28 04:02:54,679 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:02:54,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:02:54,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:02:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-28 04:02:55,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:02:55,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294977338] [2024-11-28 04:02:55,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294977338] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:02:55,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:02:55,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 04:02:55,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942355736] [2024-11-28 04:02:55,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:02:55,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:02:55,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:02:55,028 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:02:55,028 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:02:55,028 INFO L87 Difference]: Start difference. First operand 68 states and 81 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-28 04:02:55,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:02:55,082 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2024-11-28 04:02:55,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:02:55,082 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 51 [2024-11-28 04:02:55,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:02:55,083 INFO L225 Difference]: With dead ends: 75 [2024-11-28 04:02:55,084 INFO L226 Difference]: Without dead ends: 68 [2024-11-28 04:02:55,084 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:02:55,084 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 195 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 [2024-11-28 04:02:55,084 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 195 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:02:55,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-28 04:02:55,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2024-11-28 04:02:55,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 54 states have internal predecessors, (63), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-28 04:02:55,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2024-11-28 04:02:55,113 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 51 [2024-11-28 04:02:55,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:02:55,114 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2024-11-28 04:02:55,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-28 04:02:55,114 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2024-11-28 04:02:55,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-28 04:02:55,118 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:02:55,118 INFO L218 NwaCegarLoop]: trace histogram [11, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:02:55,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 04:02:55,118 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:02:55,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:02:55,119 INFO L85 PathProgramCache]: Analyzing trace with hash 368175653, now seen corresponding path program 5 times [2024-11-28 04:02:55,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:02:55,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734514991] [2024-11-28 04:02:55,119 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:02:55,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:02:55,406 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-28 04:02:55,406 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:02:57,158 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 04:02:57,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:02:57,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734514991] [2024-11-28 04:02:57,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734514991] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:02:57,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200977251] [2024-11-28 04:02:57,158 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:02:57,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:02:57,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:02:57,160 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:02:57,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:02:58,619 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-28 04:02:58,619 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:02:58,624 INFO L256 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 126 conjuncts are in the unsatisfiable core [2024-11-28 04:02:58,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:02:58,848 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 11 treesize of output 7 [2024-11-28 04:02:58,905 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 21 treesize of output 20 [2024-11-28 04:02:58,964 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:02:58,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 32 [2024-11-28 04:02:59,041 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:02:59,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 39 treesize of output 44 [2024-11-28 04:02:59,106 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:02:59,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2024-11-28 04:02:59,223 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:02:59,223 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2024-11-28 04:02:59,360 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:02:59,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2024-11-28 04:02:59,499 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:02:59,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2024-11-28 04:02:59,644 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:02:59,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2024-11-28 04:02:59,782 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:02:59,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2024-11-28 04:02:59,952 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:02:59,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2024-11-28 04:03:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:03:03,038 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:03:11,126 WARN L286 SmtUtils]: Spent 6.16s on a formula simplification. DAG size of input: 163 DAG size of output: 159 (called from [L 276] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-11-28 04:03:13,733 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 76 treesize of output 74 [2024-11-28 04:03:13,741 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 132 treesize of output 128 [2024-11-28 04:03:13,974 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:03:13,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200977251] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:03:13,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:03:13,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 31, 27] total 68 [2024-11-28 04:03:13,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146650498] [2024-11-28 04:03:13,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:03:13,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-28 04:03:13,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:03:13,975 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-28 04:03:13,976 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=4231, Unknown=0, NotChecked=0, Total=4556 [2024-11-28 04:03:13,976 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand has 68 states, 65 states have (on average 1.6) internal successors, (104), 64 states have internal predecessors, (104), 7 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 04:04:15,544 WARN L286 SmtUtils]: Spent 58.46s on a formula simplification. DAG size of input: 172 DAG size of output: 172 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 04:04:19,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:04:19,361 INFO L93 Difference]: Finished difference Result 129 states and 156 transitions. [2024-11-28 04:04:19,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-28 04:04:19,362 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 65 states have (on average 1.6) internal successors, (104), 64 states have internal predecessors, (104), 7 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 50 [2024-11-28 04:04:19,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:04:19,363 INFO L225 Difference]: With dead ends: 129 [2024-11-28 04:04:19,363 INFO L226 Difference]: Without dead ends: 84 [2024-11-28 04:04:19,366 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 68.6s TimeCoverageRelationStatistics Valid=721, Invalid=9785, Unknown=0, NotChecked=0, Total=10506 [2024-11-28 04:04:19,366 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 159 mSDsluCounter, 1099 mSDsCounter, 0 mSdLazyCounter, 2245 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1128 SdHoareTripleChecker+Invalid, 2350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:04:19,366 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 1128 Invalid, 2350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2245 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-28 04:04:19,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-28 04:04:19,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 72. [2024-11-28 04:04:19,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 55 states have (on average 1.2545454545454546) internal successors, (69), 58 states have internal predecessors, (69), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-28 04:04:19,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2024-11-28 04:04:19,395 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 50 [2024-11-28 04:04:19,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:04:19,396 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2024-11-28 04:04:19,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 65 states have (on average 1.6) internal successors, (104), 64 states have internal predecessors, (104), 7 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 04:04:19,396 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2024-11-28 04:04:19,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-28 04:04:19,397 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:04:19,397 INFO L218 NwaCegarLoop]: trace histogram [12, 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] [2024-11-28 04:04:19,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 04:04:19,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 04:04:19,597 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:04:19,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:04:19,598 INFO L85 PathProgramCache]: Analyzing trace with hash -225669710, now seen corresponding path program 1 times [2024-11-28 04:04:19,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:04:19,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852597513] [2024-11-28 04:04:19,598 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:04:19,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:04:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:04:20,314 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:04:20,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:04:20,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852597513] [2024-11-28 04:04:20,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852597513] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:04:20,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838755109] [2024-11-28 04:04:20,315 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:04:20,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:04:20,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:04:20,317 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:04:20,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 04:04:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:04:20,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 04:04:20,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:04:20,621 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-28 04:04:20,621 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:04:20,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838755109] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:04:20,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:04:20,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [16] total 18 [2024-11-28 04:04:20,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745719442] [2024-11-28 04:04:20,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:04:20,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:04:20,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:04:20,622 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:04:20,622 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:04:20,622 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 04:04:20,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:04:20,675 INFO L93 Difference]: Finished difference Result 119 states and 143 transitions. [2024-11-28 04:04:20,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:04:20,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 53 [2024-11-28 04:04:20,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:04:20,678 INFO L225 Difference]: With dead ends: 119 [2024-11-28 04:04:20,678 INFO L226 Difference]: Without dead ends: 74 [2024-11-28 04:04:20,679 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:04:20,680 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:04:20,680 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 101 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:04:20,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-28 04:04:20,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2024-11-28 04:04:20,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 58 states have internal predecessors, (68), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-28 04:04:20,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2024-11-28 04:04:20,710 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 53 [2024-11-28 04:04:20,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:04:20,711 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2024-11-28 04:04:20,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 04:04:20,711 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2024-11-28 04:04:20,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-28 04:04:20,713 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:04:20,714 INFO L218 NwaCegarLoop]: trace histogram [12, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:04:20,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 04:04:20,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-28 04:04:20,915 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:04:20,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:04:20,915 INFO L85 PathProgramCache]: Analyzing trace with hash -175549051, now seen corresponding path program 6 times [2024-11-28 04:04:20,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:04:20,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618433590] [2024-11-28 04:04:20,917 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:04:20,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:04:21,072 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-28 04:04:21,073 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:04:21,634 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:04:21,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:04:21,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618433590] [2024-11-28 04:04:21,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618433590] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:04:21,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869850347] [2024-11-28 04:04:21,635 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:04:21,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:04:21,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:04:21,637 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:04:21,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 04:04:24,685 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-28 04:04:24,685 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:04:24,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 129 conjuncts are in the unsatisfiable core [2024-11-28 04:04:24,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:04:24,708 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 11 treesize of output 7 [2024-11-28 04:04:24,744 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 21 treesize of output 20 [2024-11-28 04:04:24,786 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:04:24,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 32 [2024-11-28 04:04:24,843 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:04:24,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 39 treesize of output 44 [2024-11-28 04:04:24,907 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:04:24,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2024-11-28 04:04:24,979 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:04:24,980 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2024-11-28 04:04:25,066 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:04:25,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2024-11-28 04:04:25,159 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:04:25,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2024-11-28 04:04:25,260 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:04:25,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2024-11-28 04:04:25,378 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:04:25,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2024-11-28 04:04:25,524 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:04:25,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2024-11-28 04:04:25,673 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:04:25,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 111 treesize of output 140 [2024-11-28 04:04:29,251 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:04:29,251 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:04:40,216 WARN L286 SmtUtils]: Spent 8.74s on a formula simplification. DAG size of input: 184 DAG size of output: 177 (called from [L 276] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-11-28 04:04:43,487 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 163 treesize of output 159 [2024-11-28 04:04:43,500 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:04:43,500 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 219 treesize of output 213 [2024-11-28 04:04:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:04:43,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869850347] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:04:43,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:04:43,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27, 26] total 64 [2024-11-28 04:04:43,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248152874] [2024-11-28 04:04:43,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:04:43,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-28 04:04:43,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:04:43,665 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-28 04:04:43,667 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=3600, Unknown=0, NotChecked=0, Total=4032 [2024-11-28 04:04:43,667 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 64 states, 64 states have (on average 1.640625) internal successors, (105), 63 states have internal predecessors, (105), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-28 04:04:48,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:04:48,490 INFO L93 Difference]: Finished difference Result 137 states and 166 transitions. [2024-11-28 04:04:48,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-28 04:04:48,491 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.640625) internal successors, (105), 63 states have internal predecessors, (105), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 54 [2024-11-28 04:04:48,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:04:48,492 INFO L225 Difference]: With dead ends: 137 [2024-11-28 04:04:48,492 INFO L226 Difference]: Without dead ends: 86 [2024-11-28 04:04:48,493 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1156 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=533, Invalid=4437, Unknown=0, NotChecked=0, Total=4970 [2024-11-28 04:04:48,494 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 61 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 1660 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 1713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:04:48,494 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 891 Invalid, 1713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1660 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-28 04:04:48,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-28 04:04:48,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2024-11-28 04:04:48,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 62 states have internal predecessors, (69), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-28 04:04:48,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2024-11-28 04:04:48,519 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 54 [2024-11-28 04:04:48,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:04:48,519 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2024-11-28 04:04:48,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.640625) internal successors, (105), 63 states have internal predecessors, (105), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-28 04:04:48,519 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2024-11-28 04:04:48,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-28 04:04:48,520 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:04:48,520 INFO L218 NwaCegarLoop]: trace histogram [13, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:04:48,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 04:04:48,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:04:48,721 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:04:48,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:04:48,721 INFO L85 PathProgramCache]: Analyzing trace with hash -915813851, now seen corresponding path program 7 times [2024-11-28 04:04:48,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:04:48,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902329881] [2024-11-28 04:04:48,721 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:04:48,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:04:48,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:04:49,612 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-28 04:04:49,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:04:49,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902329881] [2024-11-28 04:04:49,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902329881] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:04:49,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059515171] [2024-11-28 04:04:49,612 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:04:49,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:04:49,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:04:49,615 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:04:49,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 04:04:50,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:04:50,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 136 conjuncts are in the unsatisfiable core [2024-11-28 04:04:50,151 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:04:50,350 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 11 treesize of output 7 [2024-11-28 04:04:50,386 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 21 treesize of output 20 [2024-11-28 04:04:50,432 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:04:50,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 32 [2024-11-28 04:04:50,490 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:04:50,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 39 treesize of output 44 [2024-11-28 04:04:50,557 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:04:50,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2024-11-28 04:04:50,631 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:04:50,632 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2024-11-28 04:04:50,717 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:04:50,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2024-11-28 04:04:50,840 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:04:50,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2024-11-28 04:04:50,963 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:04:50,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2024-11-28 04:04:51,114 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:04:51,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2024-11-28 04:04:51,272 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:04:51,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2024-11-28 04:04:51,442 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:04:51,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 111 treesize of output 140 [2024-11-28 04:04:51,624 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:04:51,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 120 treesize of output 152 [2024-11-28 04:04:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:04:56,049 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:05:09,531 WARN L286 SmtUtils]: Spent 10.90s on a formula simplification. DAG size of input: 185 DAG size of output: 181 (called from [L 276] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-11-28 04:05:13,325 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 88 treesize of output 86 [2024-11-28 04:05:13,332 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 150 treesize of output 146 [2024-11-28 04:05:13,609 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:05:13,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059515171] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:05:13,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:05:13,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 35, 30] total 77 [2024-11-28 04:05:13,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611327710] [2024-11-28 04:05:13,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:05:13,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-11-28 04:05:13,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:05:13,611 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-11-28 04:05:13,612 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=5373, Unknown=0, NotChecked=0, Total=5852 [2024-11-28 04:05:13,613 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand has 77 states, 75 states have (on average 1.6266666666666667) internal successors, (122), 74 states have internal predecessors, (122), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 04:05:21,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:05:21,905 INFO L93 Difference]: Finished difference Result 146 states and 169 transitions. [2024-11-28 04:05:21,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-28 04:05:21,906 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 75 states have (on average 1.6266666666666667) internal successors, (122), 74 states have internal predecessors, (122), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 58 [2024-11-28 04:05:21,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:05:21,907 INFO L225 Difference]: With dead ends: 146 [2024-11-28 04:05:21,907 INFO L226 Difference]: Without dead ends: 92 [2024-11-28 04:05:21,910 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2021 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=923, Invalid=11509, Unknown=0, NotChecked=0, Total=12432 [2024-11-28 04:05:21,911 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 147 mSDsluCounter, 1219 mSDsCounter, 0 mSdLazyCounter, 2406 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 2471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:05:21,912 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 1254 Invalid, 2471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2406 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-11-28 04:05:21,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-28 04:05:21,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2024-11-28 04:05:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 66 states have internal predecessors, (74), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-28 04:05:21,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2024-11-28 04:05:21,955 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 58 [2024-11-28 04:05:21,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:05:21,955 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2024-11-28 04:05:21,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 75 states have (on average 1.6266666666666667) internal successors, (122), 74 states have internal predecessors, (122), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 04:05:21,956 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2024-11-28 04:05:21,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-28 04:05:21,956 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:05:21,956 INFO L218 NwaCegarLoop]: trace histogram [14, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:05:21,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 04:05:22,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:05:22,161 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:05:22,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:05:22,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1557680763, now seen corresponding path program 8 times [2024-11-28 04:05:22,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:05:22,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044669681] [2024-11-28 04:05:22,162 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:05:22,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:05:22,217 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:05:22,218 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:05:22,982 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-28 04:05:22,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:05:22,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044669681] [2024-11-28 04:05:22,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044669681] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:05:22,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164486391] [2024-11-28 04:05:22,982 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:05:22,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:05:22,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:05:22,985 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:05:22,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 04:05:24,121 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:05:24,121 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:05:24,127 INFO L256 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 155 conjuncts are in the unsatisfiable core [2024-11-28 04:05:24,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:05:24,332 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 11 treesize of output 7 [2024-11-28 04:05:24,371 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 21 treesize of output 20 [2024-11-28 04:05:24,419 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:05:24,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 32 [2024-11-28 04:05:24,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:05:24,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 39 treesize of output 44 [2024-11-28 04:05:24,552 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:05:24,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2024-11-28 04:05:24,629 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:05:24,629 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2024-11-28 04:05:24,718 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:05:24,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2024-11-28 04:05:24,820 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:05:24,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2024-11-28 04:05:24,953 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:05:24,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2024-11-28 04:05:25,093 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:05:25,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2024-11-28 04:05:25,258 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:05:25,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2024-11-28 04:05:25,426 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:05:25,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 111 treesize of output 140 [2024-11-28 04:05:25,618 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:05:25,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 120 treesize of output 152 [2024-11-28 04:05:25,822 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:05:25,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 129 treesize of output 164 [2024-11-28 04:05:30,513 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:05:30,513 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:05:53,994 WARN L286 SmtUtils]: Spent 21.07s on a formula simplification. DAG size of input: 210 DAG size of output: 207 (called from [L 276] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-11-28 04:05:58,164 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 94 treesize of output 92 [2024-11-28 04:05:58,170 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 159 treesize of output 155 [2024-11-28 04:05:58,483 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 70 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:05:58,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164486391] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:05:58,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:05:58,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 35, 31] total 79 [2024-11-28 04:05:58,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439245057] [2024-11-28 04:05:58,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:05:58,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2024-11-28 04:05:58,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:05:58,486 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2024-11-28 04:05:58,487 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=5668, Unknown=0, NotChecked=0, Total=6162 [2024-11-28 04:05:58,488 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 79 states, 76 states have (on average 1.7236842105263157) internal successors, (131), 75 states have internal predecessors, (131), 7 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 04:06:08,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:06:08,832 INFO L93 Difference]: Finished difference Result 153 states and 178 transitions. [2024-11-28 04:06:08,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-28 04:06:08,833 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 76 states have (on average 1.7236842105263157) internal successors, (131), 75 states have internal predecessors, (131), 7 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 62 [2024-11-28 04:06:08,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:06:08,834 INFO L225 Difference]: With dead ends: 153 [2024-11-28 04:06:08,834 INFO L226 Difference]: Without dead ends: 99 [2024-11-28 04:06:08,836 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2106 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=1025, Invalid=13017, Unknown=0, NotChecked=0, Total=14042 [2024-11-28 04:06:08,837 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 157 mSDsluCounter, 1380 mSDsCounter, 0 mSdLazyCounter, 2987 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1415 SdHoareTripleChecker+Invalid, 3062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:06:08,837 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 1415 Invalid, 3062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2987 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-11-28 04:06:08,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-28 04:06:08,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 84. [2024-11-28 04:06:08,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 70 states have internal predecessors, (80), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-28 04:06:08,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2024-11-28 04:06:08,888 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 62 [2024-11-28 04:06:08,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:06:08,888 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2024-11-28 04:06:08,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 76 states have (on average 1.7236842105263157) internal successors, (131), 75 states have internal predecessors, (131), 7 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 04:06:08,889 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2024-11-28 04:06:08,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-28 04:06:08,890 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:06:08,890 INFO L218 NwaCegarLoop]: trace histogram [15, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:06:08,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 04:06:09,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 04:06:09,090 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:06:09,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:06:09,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1378702811, now seen corresponding path program 9 times [2024-11-28 04:06:09,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:06:09,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805242003] [2024-11-28 04:06:09,091 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:06:09,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:06:09,404 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-28 04:06:09,405 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:06:13,450 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 10 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:06:13,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:06:13,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805242003] [2024-11-28 04:06:13,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805242003] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:06:13,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786792019] [2024-11-28 04:06:13,450 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:06:13,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:06:13,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:06:13,452 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:06:13,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 04:06:33,219 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-28 04:06:33,219 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:06:33,228 INFO L256 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 146 conjuncts are in the unsatisfiable core [2024-11-28 04:06:33,235 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:06:33,241 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 11 treesize of output 7 [2024-11-28 04:06:33,292 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 21 treesize of output 20 [2024-11-28 04:06:33,357 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:06:33,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 32 [2024-11-28 04:06:33,435 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:06:33,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 39 treesize of output 44 [2024-11-28 04:06:33,526 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:06:33,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2024-11-28 04:06:33,633 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:06:33,633 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2024-11-28 04:06:33,741 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:06:33,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2024-11-28 04:06:33,853 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:06:33,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2024-11-28 04:06:33,981 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:06:33,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2024-11-28 04:06:34,119 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:06:34,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2024-11-28 04:06:34,278 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:06:34,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2024-11-28 04:06:34,467 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:06:34,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 111 treesize of output 140 [2024-11-28 04:06:34,669 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:06:34,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 120 treesize of output 152 [2024-11-28 04:06:34,868 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:06:34,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 129 treesize of output 164 [2024-11-28 04:06:35,083 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:06:35,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 138 treesize of output 176 [2024-11-28 04:06:41,388 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:06:41,388 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:07:07,795 WARN L286 SmtUtils]: Spent 20.72s on a formula simplification. DAG size of input: 207 DAG size of output: 205 (called from [L 276] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-11-28 04:07:12,643 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 201 treesize of output 197 [2024-11-28 04:07:12,651 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:07:12,652 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 252 treesize of output 244 [2024-11-28 04:07:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:07:12,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786792019] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:07:12,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:07:12,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 33] total 96 [2024-11-28 04:07:12,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492851490] [2024-11-28 04:07:12,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:07:12,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2024-11-28 04:07:12,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:07:12,917 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2024-11-28 04:07:12,918 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=542, Invalid=8578, Unknown=0, NotChecked=0, Total=9120 [2024-11-28 04:07:12,918 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand has 96 states, 94 states have (on average 1.6702127659574468) internal successors, (157), 94 states have internal predecessors, (157), 7 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 04:07:48,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:07:48,290 INFO L93 Difference]: Finished difference Result 201 states and 253 transitions. [2024-11-28 04:07:48,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-28 04:07:48,291 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 94 states have (on average 1.6702127659574468) internal successors, (157), 94 states have internal predecessors, (157), 7 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 66 [2024-11-28 04:07:48,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:07:48,293 INFO L225 Difference]: With dead ends: 201 [2024-11-28 04:07:48,293 INFO L226 Difference]: Without dead ends: 146 [2024-11-28 04:07:48,294 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3426 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=842, Invalid=13438, Unknown=0, NotChecked=0, Total=14280 [2024-11-28 04:07:48,295 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 190 mSDsluCounter, 2342 mSDsCounter, 0 mSdLazyCounter, 5651 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 2390 SdHoareTripleChecker+Invalid, 5718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 5651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:07:48,295 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 2390 Invalid, 5718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 5651 Invalid, 0 Unknown, 0 Unchecked, 18.8s Time] [2024-11-28 04:07:48,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-28 04:07:48,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 114. [2024-11-28 04:07:48,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 97 states have (on average 1.3195876288659794) internal successors, (128), 100 states have internal predecessors, (128), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-28 04:07:48,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 145 transitions. [2024-11-28 04:07:48,371 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 145 transitions. Word has length 66 [2024-11-28 04:07:48,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:07:48,372 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 145 transitions. [2024-11-28 04:07:48,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 94 states have (on average 1.6702127659574468) internal successors, (157), 94 states have internal predecessors, (157), 7 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 04:07:48,372 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 145 transitions. [2024-11-28 04:07:48,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-28 04:07:48,373 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:07:48,373 INFO L218 NwaCegarLoop]: trace histogram [15, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:07:48,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 04:07:48,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 04:07:48,574 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:07:48,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:07:48,574 INFO L85 PathProgramCache]: Analyzing trace with hash 600459325, now seen corresponding path program 10 times [2024-11-28 04:07:48,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:07:48,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227865324] [2024-11-28 04:07:48,574 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:07:48,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:07:48,705 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:07:48,705 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:07:51,320 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 6 proven. 249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:07:51,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:07:51,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227865324] [2024-11-28 04:07:51,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227865324] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:07:51,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653832183] [2024-11-28 04:07:51,320 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:07:51,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:07:51,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:07:51,322 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:07:51,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 04:07:52,432 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:07:52,432 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:07:52,437 INFO L256 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 145 conjuncts are in the unsatisfiable core [2024-11-28 04:07:52,443 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:07:52,449 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 11 treesize of output 7 [2024-11-28 04:07:52,505 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 21 treesize of output 20 [2024-11-28 04:07:52,575 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:07:52,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 32 [2024-11-28 04:07:52,656 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:07:52,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 39 treesize of output 44 [2024-11-28 04:07:52,742 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:07:52,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2024-11-28 04:07:52,845 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:07:52,845 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2024-11-28 04:07:52,964 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:07:52,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2024-11-28 04:07:53,088 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:07:53,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2024-11-28 04:07:53,229 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:07:53,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2024-11-28 04:07:53,383 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:07:53,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2024-11-28 04:07:53,543 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:07:53,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2024-11-28 04:07:53,728 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:07:53,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 111 treesize of output 140 [2024-11-28 04:07:53,945 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:07:53,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 120 treesize of output 152 [2024-11-28 04:07:54,161 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:07:54,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 129 treesize of output 164 [2024-11-28 04:07:54,416 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:07:54,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 138 treesize of output 176 [2024-11-28 04:08:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:08:00,212 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:08:30,120 WARN L286 SmtUtils]: Spent 19.05s on a formula simplification. DAG size of input: 218 DAG size of output: 207 (called from [L 276] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-11-28 04:08:35,770 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 201 treesize of output 197 [2024-11-28 04:08:35,781 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:08:35,781 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 246 treesize of output 238 [2024-11-28 04:08:36,030 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 23 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:08:36,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653832183] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:08:36,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:08:36,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 32] total 94 [2024-11-28 04:08:36,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411537819] [2024-11-28 04:08:36,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:08:36,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2024-11-28 04:08:36,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:08:36,032 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2024-11-28 04:08:36,033 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=8214, Unknown=1, NotChecked=0, Total=8742 [2024-11-28 04:08:36,033 INFO L87 Difference]: Start difference. First operand 114 states and 145 transitions. Second operand has 94 states, 92 states have (on average 1.8043478260869565) internal successors, (166), 92 states have internal predecessors, (166), 7 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 04:08:43,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:08:43,073 INFO L93 Difference]: Finished difference Result 211 states and 271 transitions. [2024-11-28 04:08:43,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-28 04:08:43,074 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 92 states have (on average 1.8043478260869565) internal successors, (166), 92 states have internal predecessors, (166), 7 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 69 [2024-11-28 04:08:43,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:08:43,075 INFO L225 Difference]: With dead ends: 211 [2024-11-28 04:08:43,075 INFO L226 Difference]: Without dead ends: 134 [2024-11-28 04:08:43,077 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2269 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=598, Invalid=9301, Unknown=1, NotChecked=0, Total=9900 [2024-11-28 04:08:43,077 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 77 mSDsluCounter, 2000 mSDsCounter, 0 mSdLazyCounter, 3735 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 2043 SdHoareTripleChecker+Invalid, 3773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 3735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2024-11-28 04:08:43,077 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 2043 Invalid, 3773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 3735 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2024-11-28 04:08:43,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-28 04:08:43,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 114. [2024-11-28 04:08:43,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 97 states have (on average 1.3195876288659794) internal successors, (128), 100 states have internal predecessors, (128), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-28 04:08:43,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 145 transitions. [2024-11-28 04:08:43,149 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 145 transitions. Word has length 69 [2024-11-28 04:08:43,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:08:43,149 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 145 transitions. [2024-11-28 04:08:43,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 92 states have (on average 1.8043478260869565) internal successors, (166), 92 states have internal predecessors, (166), 7 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 04:08:43,150 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 145 transitions. [2024-11-28 04:08:43,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-28 04:08:43,150 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:08:43,150 INFO L218 NwaCegarLoop]: trace histogram [15, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:08:43,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 04:08:43,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 04:08:43,351 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:08:43,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:08:43,351 INFO L85 PathProgramCache]: Analyzing trace with hash 508613413, now seen corresponding path program 11 times [2024-11-28 04:08:43,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:08:43,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986856640] [2024-11-28 04:08:43,351 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:08:43,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:08:43,717 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-28 04:08:43,717 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:08:46,301 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 3 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:08:46,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:08:46,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986856640] [2024-11-28 04:08:46,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986856640] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:08:46,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322329438] [2024-11-28 04:08:46,302 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:08:46,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:08:46,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:08:46,304 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:08:46,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 04:08:56,014 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-28 04:08:56,015 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:08:56,024 INFO L256 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 160 conjuncts are in the unsatisfiable core [2024-11-28 04:08:56,031 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:08:56,267 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 11 treesize of output 7 [2024-11-28 04:08:56,318 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 21 treesize of output 20 [2024-11-28 04:08:56,383 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:08:56,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 32 [2024-11-28 04:08:56,457 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:08:56,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 39 treesize of output 44 [2024-11-28 04:08:56,544 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:08:56,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2024-11-28 04:08:56,638 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:08:56,638 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2024-11-28 04:08:56,745 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:08:56,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2024-11-28 04:08:56,863 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:08:56,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2024-11-28 04:08:56,987 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:08:56,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2024-11-28 04:08:57,140 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:08:57,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2024-11-28 04:08:57,296 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:08:57,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2024-11-28 04:08:57,472 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:08:57,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 111 treesize of output 140 [2024-11-28 04:08:57,656 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:08:57,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 120 treesize of output 152 [2024-11-28 04:08:57,856 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:08:57,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 129 treesize of output 164 [2024-11-28 04:08:58,069 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:08:58,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 138 treesize of output 176 [2024-11-28 04:09:04,519 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:09:04,519 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:09:33,096 WARN L286 SmtUtils]: Spent 25.50s on a formula simplification. DAG size of input: 220 DAG size of output: 217 (called from [L 276] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-11-28 04:09:37,766 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 100 treesize of output 98 [2024-11-28 04:09:37,771 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 160 treesize of output 156 [2024-11-28 04:09:38,082 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 60 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:09:38,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322329438] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:09:38,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:09:38,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 39, 34] total 103 [2024-11-28 04:09:38,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14206498] [2024-11-28 04:09:38,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:09:38,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2024-11-28 04:09:38,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:09:38,084 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2024-11-28 04:09:38,085 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=555, Invalid=9951, Unknown=0, NotChecked=0, Total=10506 [2024-11-28 04:09:38,085 INFO L87 Difference]: Start difference. First operand 114 states and 145 transitions. Second operand has 103 states, 99 states have (on average 1.8484848484848484) internal successors, (183), 99 states have internal predecessors, (183), 9 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-28 04:09:50,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:09:50,254 INFO L93 Difference]: Finished difference Result 213 states and 273 transitions. [2024-11-28 04:09:50,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-28 04:09:50,254 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 99 states have (on average 1.8484848484848484) internal successors, (183), 99 states have internal predecessors, (183), 9 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 72 [2024-11-28 04:09:50,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:09:50,256 INFO L225 Difference]: With dead ends: 213 [2024-11-28 04:09:50,256 INFO L226 Difference]: Without dead ends: 136 [2024-11-28 04:09:50,257 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4028 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=1034, Invalid=18706, Unknown=0, NotChecked=0, Total=19740 [2024-11-28 04:09:50,257 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 196 mSDsluCounter, 2448 mSDsCounter, 0 mSdLazyCounter, 4988 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 2490 SdHoareTripleChecker+Invalid, 5074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 4988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:09:50,257 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 2490 Invalid, 5074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 4988 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2024-11-28 04:09:50,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-28 04:09:50,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 114. [2024-11-28 04:09:50,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 97 states have (on average 1.3195876288659794) internal successors, (128), 100 states have internal predecessors, (128), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-28 04:09:50,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 145 transitions. [2024-11-28 04:09:50,343 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 145 transitions. Word has length 72 [2024-11-28 04:09:50,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:09:50,343 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 145 transitions. [2024-11-28 04:09:50,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 99 states have (on average 1.8484848484848484) internal successors, (183), 99 states have internal predecessors, (183), 9 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-28 04:09:50,343 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 145 transitions. [2024-11-28 04:09:50,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-28 04:09:50,344 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:09:50,344 INFO L218 NwaCegarLoop]: trace histogram [15, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:09:50,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 04:09:50,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 04:09:50,545 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:09:50,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:09:50,545 INFO L85 PathProgramCache]: Analyzing trace with hash 221216573, now seen corresponding path program 12 times [2024-11-28 04:09:50,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:09:50,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981920339] [2024-11-28 04:09:50,545 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:09:50,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:09:50,905 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-11-28 04:09:50,905 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:10:00,363 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 1 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:10:00,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:10:00,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981920339] [2024-11-28 04:10:00,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981920339] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:10:00,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748497522] [2024-11-28 04:10:00,363 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:10:00,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:00,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:10:00,365 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:10:00,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adbb1ae1-a746-4435-a2c4-9c1b1d7ad84d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 04:11:49,250 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-11-28 04:11:49,250 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:11:49,268 INFO L256 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 187 conjuncts are in the unsatisfiable core [2024-11-28 04:11:49,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:11:49,770 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 11 treesize of output 7 [2024-11-28 04:11:49,861 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 21 treesize of output 20 [2024-11-28 04:11:49,983 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:11:49,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 32 [2024-11-28 04:11:50,129 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:11:50,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 39 treesize of output 44 [2024-11-28 04:11:50,294 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:11:50,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2024-11-28 04:11:50,483 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:11:50,483 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2024-11-28 04:11:50,668 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:11:50,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2024-11-28 04:11:50,863 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:11:50,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2024-11-28 04:11:51,082 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:11:51,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2024-11-28 04:11:51,315 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:11:51,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2024-11-28 04:11:51,557 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:11:51,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2024-11-28 04:11:51,838 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:11:51,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 111 treesize of output 140 [2024-11-28 04:11:52,197 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:11:52,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 120 treesize of output 152 [2024-11-28 04:11:52,492 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:11:52,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 129 treesize of output 164 [2024-11-28 04:11:52,824 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:11:52,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 138 treesize of output 176 [2024-11-28 04:12:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:12:05,023 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:13:07,737 WARN L286 SmtUtils]: Spent 38.43s on a formula simplification that was a NOOP. DAG size: 93 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 04:13:42,278 WARN L286 SmtUtils]: Spent 7.77s on a formula simplification that was a NOOP. DAG size: 94 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 04:14:16,319 WARN L286 SmtUtils]: Spent 23.95s on a formula simplification. DAG size of input: 221 DAG size of output: 213 (called from [L 276] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition)