./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.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_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/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_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/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_13a772dc-29fa-4655-8034-bab04d4aecaf/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 f80b27594aadcdaa93090b35b429df9d0a90b0252fa7b12ed0563c83d3b4cc77 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:28:57,010 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:28:57,080 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-64bit-Automizer_Default.epf [2024-11-28 03:28:57,086 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:28:57,086 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:28:57,114 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:28:57,115 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:28:57,115 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:28:57,115 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:28:57,115 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:28:57,115 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:28:57,116 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:28:57,116 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:28:57,116 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:28:57,116 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:28:57,116 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:28:57,116 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 03:28:57,117 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:28:57,117 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:28:57,117 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 03:28:57,117 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:28:57,117 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 03:28:57,117 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 03:28:57,117 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:28:57,117 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:28:57,117 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:28:57,118 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:28:57,118 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:28:57,118 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:28:57,118 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:28:57,118 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:28:57,118 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:28:57,118 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:28:57,118 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:28:57,118 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:28:57,119 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:28:57,119 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:28:57,119 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 03:28:57,119 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 03:28:57,119 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:28:57,119 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:28:57,119 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:28:57,119 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:28:57,119 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:28:57,120 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:28:57,120 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_13a772dc-29fa-4655-8034-bab04d4aecaf/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 -> f80b27594aadcdaa93090b35b429df9d0a90b0252fa7b12ed0563c83d3b4cc77 [2024-11-28 03:28:57,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:28:57,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:28:57,530 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:28:57,532 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:28:57,532 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:28:57,534 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i [2024-11-28 03:29:00,745 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/data/c409521a7/bf3c6d25120d45c19f10aa6f782963b6/FLAG4d44ecc45 [2024-11-28 03:29:01,286 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:29:01,287 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i [2024-11-28 03:29:01,331 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/data/c409521a7/bf3c6d25120d45c19f10aa6f782963b6/FLAG4d44ecc45 [2024-11-28 03:29:01,808 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/data/c409521a7/bf3c6d25120d45c19f10aa6f782963b6 [2024-11-28 03:29:01,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:29:01,812 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:29:01,814 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:29:01,814 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:29:01,819 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:29:01,820 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:29:01" (1/1) ... [2024-11-28 03:29:01,821 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76d426ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:01, skipping insertion in model container [2024-11-28 03:29:01,821 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:29:01" (1/1) ... [2024-11-28 03:29:01,930 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:29:02,301 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_13a772dc-29fa-4655-8034-bab04d4aecaf/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i[4494,4507] [2024-11-28 03:29:02,311 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_13a772dc-29fa-4655-8034-bab04d4aecaf/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i[4554,4567] [2024-11-28 03:29:03,316 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 03:29:03,317 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 03:29:03,318 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 03:29:03,319 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 03:29:03,320 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 03:29:03,340 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 03:29:03,341 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 03:29:03,344 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 03:29:03,345 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 03:29:03,347 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 03:29:03,349 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 03:29:03,350 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 03:29:03,350 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 03:29:04,122 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_13a772dc-29fa-4655-8034-bab04d4aecaf/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i[150678,150691] [2024-11-28 03:29:04,123 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:29:04,149 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:29:04,164 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_13a772dc-29fa-4655-8034-bab04d4aecaf/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i[4494,4507] [2024-11-28 03:29:04,165 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_13a772dc-29fa-4655-8034-bab04d4aecaf/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i[4554,4567] [2024-11-28 03:29:04,270 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 03:29:04,272 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 03:29:04,273 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 03:29:04,273 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 03:29:04,274 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 03:29:04,292 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 03:29:04,293 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 03:29:04,294 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 03:29:04,295 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 03:29:04,296 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 03:29:04,298 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 03:29:04,298 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 03:29:04,299 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 03:29:04,486 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_13a772dc-29fa-4655-8034-bab04d4aecaf/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i[150678,150691] [2024-11-28 03:29:04,487 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:29:04,693 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:29:04,694 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:04 WrapperNode [2024-11-28 03:29:04,694 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:29:04,695 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:29:04,695 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:29:04,695 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:29:04,703 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:04" (1/1) ... [2024-11-28 03:29:04,758 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:04" (1/1) ... [2024-11-28 03:29:04,808 INFO L138 Inliner]: procedures = 668, calls = 1038, calls flagged for inlining = 53, calls inlined = 6, statements flattened = 135 [2024-11-28 03:29:04,809 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:29:04,809 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:29:04,810 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:29:04,810 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:29:04,828 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:04" (1/1) ... [2024-11-28 03:29:04,828 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:04" (1/1) ... [2024-11-28 03:29:04,832 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:04" (1/1) ... [2024-11-28 03:29:04,865 INFO L175 MemorySlicer]: Split 21 memory accesses to 3 slices as follows [2, 14, 5]. 67 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5]. The 6 writes are split as follows [0, 6, 0]. [2024-11-28 03:29:04,866 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:04" (1/1) ... [2024-11-28 03:29:04,868 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:04" (1/1) ... [2024-11-28 03:29:04,891 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:04" (1/1) ... [2024-11-28 03:29:04,892 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:04" (1/1) ... [2024-11-28 03:29:04,900 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:04" (1/1) ... [2024-11-28 03:29:04,907 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:04" (1/1) ... [2024-11-28 03:29:04,909 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:04" (1/1) ... [2024-11-28 03:29:04,916 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:29:04,916 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:29:04,917 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:29:04,917 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:29:04,922 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:04" (1/1) ... [2024-11-28 03:29:04,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:29:04,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:29:04,969 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:29:04,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:29:05,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 03:29:05,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-28 03:29:05,000 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-28 03:29:05,000 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2024-11-28 03:29:05,000 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2024-11-28 03:29:05,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 03:29:05,001 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2024-11-28 03:29:05,001 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2024-11-28 03:29:05,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:29:05,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-28 03:29:05,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-28 03:29:05,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-28 03:29:05,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:29:05,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:29:05,003 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-28 03:29:05,003 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-28 03:29:05,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 03:29:05,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-28 03:29:05,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-28 03:29:05,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-28 03:29:05,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-28 03:29:05,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-28 03:29:05,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-28 03:29:05,005 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2024-11-28 03:29:05,005 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2024-11-28 03:29:05,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 03:29:05,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 03:29:05,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-28 03:29:05,302 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:29:05,304 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:29:05,681 INFO L? ?]: Removed 54 outVars from TransFormulas that were not future-live. [2024-11-28 03:29:05,681 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:29:05,695 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:29:05,696 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-28 03:29:05,696 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:29:05 BoogieIcfgContainer [2024-11-28 03:29:05,696 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:29:05,699 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:29:05,699 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:29:05,706 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:29:05,706 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:29:01" (1/3) ... [2024-11-28 03:29:05,707 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@610c0f27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:29:05, skipping insertion in model container [2024-11-28 03:29:05,708 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:04" (2/3) ... [2024-11-28 03:29:05,708 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@610c0f27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:29:05, skipping insertion in model container [2024-11-28 03:29:05,708 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:29:05" (3/3) ... [2024-11-28 03:29:05,712 INFO L128 eAbstractionObserver]: Analyzing ICFG aws_linked_list_rend_harness_negated.i [2024-11-28 03:29:05,730 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:29:05,732 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG aws_linked_list_rend_harness_negated.i that has 6 procedures, 68 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-28 03:29:05,796 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:29:05,810 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;@69734118, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:29:05,811 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 03:29:05,815 INFO L276 IsEmpty]: Start isEmpty. Operand has 68 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 49 states have internal predecessors, (65), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-28 03:29:05,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-28 03:29:05,826 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:29:05,826 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2024-11-28 03:29:05,827 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:29:05,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:29:05,833 INFO L85 PathProgramCache]: Analyzing trace with hash -721077294, now seen corresponding path program 1 times [2024-11-28 03:29:05,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:29:05,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908638298] [2024-11-28 03:29:05,843 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:29:05,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:29:06,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:29:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-28 03:29:06,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:29:06,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908638298] [2024-11-28 03:29:06,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908638298] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:29:06,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570721195] [2024-11-28 03:29:06,341 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:29:06,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:29:06,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:29:06,344 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:29:06,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:29:06,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:29:06,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-28 03:29:06,661 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:29:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-28 03:29:06,692 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:29:06,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570721195] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:29:06,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:29:06,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-28 03:29:06,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179036553] [2024-11-28 03:29:06,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:29:06,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 03:29:06,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:29:06,724 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 03:29:06,725 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 03:29:06,728 INFO L87 Difference]: Start difference. First operand has 68 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 49 states have internal predecessors, (65), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 03:29:06,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:29:06,767 INFO L93 Difference]: Finished difference Result 128 states and 184 transitions. [2024-11-28 03:29:06,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 03:29:06,770 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2024-11-28 03:29:06,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:29:06,779 INFO L225 Difference]: With dead ends: 128 [2024-11-28 03:29:06,780 INFO L226 Difference]: Without dead ends: 63 [2024-11-28 03:29:06,786 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 69 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 03:29:06,791 INFO L435 NwaCegarLoop]: 87 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, 87 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 03:29:06,794 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:29:06,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-28 03:29:06,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-11-28 03:29:06,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 45 states have internal predecessors, (57), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-28 03:29:06,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2024-11-28 03:29:06,857 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 68 [2024-11-28 03:29:06,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:29:06,858 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2024-11-28 03:29:06,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 03:29:06,858 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2024-11-28 03:29:06,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-28 03:29:06,864 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:29:06,865 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2024-11-28 03:29:06,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 03:29:07,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:29:07,070 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:29:07,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:29:07,072 INFO L85 PathProgramCache]: Analyzing trace with hash -2007385264, now seen corresponding path program 1 times [2024-11-28 03:29:07,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:29:07,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270158487] [2024-11-28 03:29:07,074 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:29:07,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:29:07,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:29:08,249 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-28 03:29:08,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:29:08,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270158487] [2024-11-28 03:29:08,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270158487] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:29:08,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159716410] [2024-11-28 03:29:08,251 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:29:08,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:29:08,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:29:08,253 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:29:08,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:29:08,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:29:08,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-28 03:29:08,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:29:08,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2024-11-28 03:29:08,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2024-11-28 03:29:08,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:29:08,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:29:08,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:29:08,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 25 [2024-11-28 03:29:08,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:29:08,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:29:08,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 13 [2024-11-28 03:29:10,389 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:29:10,390 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:29:10,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159716410] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:29:10,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:29:10,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2024-11-28 03:29:10,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320725438] [2024-11-28 03:29:10,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:29:10,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:29:10,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:29:10,394 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:29:10,394 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:29:10,395 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-28 03:29:14,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:29:15,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:29:19,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:29:19,959 INFO L93 Difference]: Finished difference Result 171 states and 231 transitions. [2024-11-28 03:29:19,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:29:19,963 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 68 [2024-11-28 03:29:19,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:29:19,968 INFO L225 Difference]: With dead ends: 171 [2024-11-28 03:29:19,968 INFO L226 Difference]: Without dead ends: 120 [2024-11-28 03:29:19,969 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:29:19,970 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 60 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:29:19,970 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 434 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 247 Invalid, 1 Unknown, 0 Unchecked, 8.4s Time] [2024-11-28 03:29:19,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-28 03:29:20,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 115. [2024-11-28 03:29:20,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 83 states have internal predecessors, (107), 24 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-28 03:29:20,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 153 transitions. [2024-11-28 03:29:20,010 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 153 transitions. Word has length 68 [2024-11-28 03:29:20,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:29:20,011 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 153 transitions. [2024-11-28 03:29:20,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-28 03:29:20,011 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 153 transitions. [2024-11-28 03:29:20,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-28 03:29:20,016 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:29:20,017 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2024-11-28 03:29:20,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 03:29:20,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:29:20,222 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:29:20,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:29:20,222 INFO L85 PathProgramCache]: Analyzing trace with hash -509112822, now seen corresponding path program 1 times [2024-11-28 03:29:20,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:29:20,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176627755] [2024-11-28 03:29:20,223 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:29:20,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:29:20,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:29:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-28 03:29:21,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:29:21,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176627755] [2024-11-28 03:29:21,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176627755] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:29:21,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:29:21,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:29:21,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690584403] [2024-11-28 03:29:21,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:29:21,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:29:21,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:29:21,286 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:29:21,287 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:29:21,287 INFO L87 Difference]: Start difference. First operand 115 states and 153 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2024-11-28 03:29:21,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:29:21,728 INFO L93 Difference]: Finished difference Result 133 states and 178 transitions. [2024-11-28 03:29:21,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:29:21,728 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 68 [2024-11-28 03:29:21,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:29:21,731 INFO L225 Difference]: With dead ends: 133 [2024-11-28 03:29:21,731 INFO L226 Difference]: Without dead ends: 131 [2024-11-28 03:29:21,731 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:29:21,732 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 3 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:29:21,733 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 387 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 03:29:21,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-11-28 03:29:21,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2024-11-28 03:29:21,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 89 states have (on average 1.2921348314606742) internal successors, (115), 93 states have internal predecessors, (115), 26 states have call successors, (26), 11 states have call predecessors, (26), 13 states have return successors, (32), 24 states have call predecessors, (32), 24 states have call successors, (32) [2024-11-28 03:29:21,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 173 transitions. [2024-11-28 03:29:21,777 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 173 transitions. Word has length 68 [2024-11-28 03:29:21,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:29:21,778 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 173 transitions. [2024-11-28 03:29:21,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2024-11-28 03:29:21,778 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 173 transitions. [2024-11-28 03:29:21,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-28 03:29:21,780 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:29:21,780 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-28 03:29:21,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 03:29:21,781 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:29:21,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:29:21,785 INFO L85 PathProgramCache]: Analyzing trace with hash 359425096, now seen corresponding path program 1 times [2024-11-28 03:29:21,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:29:21,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567271040] [2024-11-28 03:29:21,785 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:29:21,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:29:21,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:29:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 03:29:23,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:29:23,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567271040] [2024-11-28 03:29:23,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567271040] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:29:23,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324432334] [2024-11-28 03:29:23,466 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:29:23,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:29:23,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:29:23,469 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:29:23,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:29:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:29:23,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:29:23,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:29:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 03:29:25,523 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:29:25,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324432334] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:29:25,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:29:25,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2024-11-28 03:29:25,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658498727] [2024-11-28 03:29:25,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:29:25,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 03:29:25,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:29:25,525 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 03:29:25,526 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:29:25,526 INFO L87 Difference]: Start difference. First operand 129 states and 173 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 03:29:27,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:29:27,571 INFO L93 Difference]: Finished difference Result 250 states and 337 transitions. [2024-11-28 03:29:27,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:29:27,572 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2024-11-28 03:29:27,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:29:27,574 INFO L225 Difference]: With dead ends: 250 [2024-11-28 03:29:27,575 INFO L226 Difference]: Without dead ends: 133 [2024-11-28 03:29:27,576 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2024-11-28 03:29:27,577 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 95 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:29:27,577 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 310 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-28 03:29:27,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-11-28 03:29:27,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2024-11-28 03:29:27,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 89 states have (on average 1.2696629213483146) internal successors, (113), 93 states have internal predecessors, (113), 26 states have call successors, (26), 11 states have call predecessors, (26), 13 states have return successors, (32), 24 states have call predecessors, (32), 24 states have call successors, (32) [2024-11-28 03:29:27,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 171 transitions. [2024-11-28 03:29:27,603 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 171 transitions. Word has length 70 [2024-11-28 03:29:27,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:29:27,604 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 171 transitions. [2024-11-28 03:29:27,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 03:29:27,604 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 171 transitions. [2024-11-28 03:29:27,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-28 03:29:27,606 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:29:27,606 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 03:29:27,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 03:29:27,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:29:27,810 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:29:27,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:29:27,811 INFO L85 PathProgramCache]: Analyzing trace with hash -451475402, now seen corresponding path program 1 times [2024-11-28 03:29:27,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:29:27,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865902768] [2024-11-28 03:29:27,811 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:29:27,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:29:27,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:29:29,764 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 03:29:29,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:29:29,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865902768] [2024-11-28 03:29:29,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865902768] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:29:29,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154429609] [2024-11-28 03:29:29,765 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:29:29,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:29:29,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:29:29,768 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:29:29,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:29:29,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:29:29,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:29:29,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:29:31,986 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 03:29:31,987 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:29:31,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154429609] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:29:31,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:29:31,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 18 [2024-11-28 03:29:31,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829345359] [2024-11-28 03:29:31,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:29:31,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 03:29:31,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:29:31,989 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 03:29:31,989 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:29:31,989 INFO L87 Difference]: Start difference. First operand 129 states and 171 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 03:29:34,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:29:34,913 INFO L93 Difference]: Finished difference Result 262 states and 353 transitions. [2024-11-28 03:29:34,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:29:34,913 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2024-11-28 03:29:34,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:29:34,916 INFO L225 Difference]: With dead ends: 262 [2024-11-28 03:29:34,916 INFO L226 Difference]: Without dead ends: 143 [2024-11-28 03:29:34,917 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2024-11-28 03:29:34,918 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 109 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:29:34,919 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 347 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-28 03:29:34,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-28 03:29:34,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 131. [2024-11-28 03:29:34,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 91 states have (on average 1.2637362637362637) internal successors, (115), 95 states have internal predecessors, (115), 26 states have call successors, (26), 11 states have call predecessors, (26), 13 states have return successors, (32), 24 states have call predecessors, (32), 24 states have call successors, (32) [2024-11-28 03:29:34,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 173 transitions. [2024-11-28 03:29:34,951 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 173 transitions. Word has length 72 [2024-11-28 03:29:34,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:29:34,952 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 173 transitions. [2024-11-28 03:29:34,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 03:29:34,952 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 173 transitions. [2024-11-28 03:29:34,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-28 03:29:34,954 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:29:34,954 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:29:34,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 03:29:35,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:29:35,158 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:29:35,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:29:35,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1867965090, now seen corresponding path program 1 times [2024-11-28 03:29:35,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:29:35,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284431913] [2024-11-28 03:29:35,159 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:29:35,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:29:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:29:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 03:29:36,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:29:36,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284431913] [2024-11-28 03:29:36,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284431913] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:29:36,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:29:36,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 03:29:36,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512050256] [2024-11-28 03:29:36,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:29:36,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 03:29:36,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:29:36,478 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 03:29:36,478 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:29:36,479 INFO L87 Difference]: Start difference. First operand 131 states and 173 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 03:29:37,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:29:37,951 INFO L93 Difference]: Finished difference Result 264 states and 353 transitions. [2024-11-28 03:29:37,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:29:37,953 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2024-11-28 03:29:37,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:29:37,955 INFO L225 Difference]: With dead ends: 264 [2024-11-28 03:29:37,958 INFO L226 Difference]: Without dead ends: 143 [2024-11-28 03:29:37,959 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:29:37,960 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 28 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:29:37,960 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 408 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-28 03:29:37,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-28 03:29:37,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 133. [2024-11-28 03:29:37,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 93 states have (on average 1.2580645161290323) internal successors, (117), 97 states have internal predecessors, (117), 26 states have call successors, (26), 11 states have call predecessors, (26), 13 states have return successors, (32), 24 states have call predecessors, (32), 24 states have call successors, (32) [2024-11-28 03:29:37,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 175 transitions. [2024-11-28 03:29:37,993 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 175 transitions. Word has length 73 [2024-11-28 03:29:37,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:29:37,994 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 175 transitions. [2024-11-28 03:29:37,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 03:29:37,994 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 175 transitions. [2024-11-28 03:29:37,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-28 03:29:37,995 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:29:37,996 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:29:37,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 03:29:37,996 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:29:37,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:29:37,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1253842155, now seen corresponding path program 1 times [2024-11-28 03:29:37,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:29:37,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354668004] [2024-11-28 03:29:37,997 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:29:37,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:29:38,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:29:38,692 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-28 03:29:38,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:29:38,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354668004] [2024-11-28 03:29:38,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354668004] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:29:38,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693832094] [2024-11-28 03:29:38,693 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:29:38,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:29:38,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:29:38,695 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:29:38,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:29:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:29:38,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-28 03:29:38,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:29:40,422 INFO L349 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2024-11-28 03:29:40,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 72 [2024-11-28 03:29:40,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2024-11-28 03:29:40,596 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:29:40,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2024-11-28 03:29:40,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 18 [2024-11-28 03:29:40,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-11-28 03:29:47,053 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 03:29:47,053 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:29:47,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693832094] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:29:47,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:29:47,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2024-11-28 03:29:47,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726315276] [2024-11-28 03:29:47,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:29:47,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 03:29:47,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:29:47,055 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 03:29:47,055 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:29:47,056 INFO L87 Difference]: Start difference. First operand 133 states and 175 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 03:29:51,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:29:55,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:29:59,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:30:04,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:30:08,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:30:12,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:30:12,501 INFO L93 Difference]: Finished difference Result 211 states and 281 transitions. [2024-11-28 03:30:12,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 03:30:12,502 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 74 [2024-11-28 03:30:12,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:30:12,503 INFO L225 Difference]: With dead ends: 211 [2024-11-28 03:30:12,504 INFO L226 Difference]: Without dead ends: 138 [2024-11-28 03:30:12,505 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 58 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2024-11-28 03:30:12,505 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 215 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 59 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:30:12,506 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 407 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 257 Invalid, 5 Unknown, 0 Unchecked, 23.3s Time] [2024-11-28 03:30:12,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-28 03:30:12,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2024-11-28 03:30:12,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 95 states have (on average 1.2526315789473683) internal successors, (119), 99 states have internal predecessors, (119), 26 states have call successors, (26), 11 states have call predecessors, (26), 13 states have return successors, (32), 24 states have call predecessors, (32), 24 states have call successors, (32) [2024-11-28 03:30:12,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 177 transitions. [2024-11-28 03:30:12,531 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 177 transitions. Word has length 74 [2024-11-28 03:30:12,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:30:12,532 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 177 transitions. [2024-11-28 03:30:12,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 03:30:12,532 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 177 transitions. [2024-11-28 03:30:12,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-28 03:30:12,533 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:30:12,534 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:30:12,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 03:30:12,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-28 03:30:12,738 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:30:12,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:30:12,739 INFO L85 PathProgramCache]: Analyzing trace with hash -472869467, now seen corresponding path program 1 times [2024-11-28 03:30:12,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:30:12,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755324047] [2024-11-28 03:30:12,740 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:30:12,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:30:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:30:13,463 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-28 03:30:13,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:30:13,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755324047] [2024-11-28 03:30:13,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755324047] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:30:13,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361627234] [2024-11-28 03:30:13,464 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:30:13,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:30:13,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:30:13,467 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:30:13,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:30:13,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:30:13,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-28 03:30:13,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:30:14,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2024-11-28 03:30:14,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2024-11-28 03:30:14,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:30:14,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:30:14,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:30:15,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 25 [2024-11-28 03:30:15,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:30:15,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:30:15,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 13 [2024-11-28 03:30:22,829 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 03:30:22,829 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:30:22,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361627234] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:30:22,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:30:22,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2024-11-28 03:30:22,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520308477] [2024-11-28 03:30:22,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:30:22,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 03:30:22,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:30:22,831 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 03:30:22,831 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:30:22,832 INFO L87 Difference]: Start difference. First operand 135 states and 177 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 03:30:27,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:30:32,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:30:32,855 INFO L93 Difference]: Finished difference Result 218 states and 289 transitions. [2024-11-28 03:30:32,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 03:30:32,856 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 74 [2024-11-28 03:30:32,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:30:32,858 INFO L225 Difference]: With dead ends: 218 [2024-11-28 03:30:32,858 INFO L226 Difference]: Without dead ends: 140 [2024-11-28 03:30:32,859 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:30:32,859 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 75 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 23 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:30:32,860 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 464 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 292 Invalid, 1 Unknown, 0 Unchecked, 8.3s Time] [2024-11-28 03:30:32,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-28 03:30:32,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2024-11-28 03:30:32,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 97 states have (on average 1.2474226804123711) internal successors, (121), 101 states have internal predecessors, (121), 26 states have call successors, (26), 11 states have call predecessors, (26), 13 states have return successors, (32), 24 states have call predecessors, (32), 24 states have call successors, (32) [2024-11-28 03:30:32,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 179 transitions. [2024-11-28 03:30:32,889 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 179 transitions. Word has length 74 [2024-11-28 03:30:32,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:30:32,889 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 179 transitions. [2024-11-28 03:30:32,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 03:30:32,889 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 179 transitions. [2024-11-28 03:30:32,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-28 03:30:32,891 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:30:32,891 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:30:32,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 03:30:33,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-28 03:30:33,095 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:30:33,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:30:33,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1985361953, now seen corresponding path program 1 times [2024-11-28 03:30:33,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:30:33,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237722909] [2024-11-28 03:30:33,096 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:30:33,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:30:33,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:30:33,747 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-28 03:30:33,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:30:33,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237722909] [2024-11-28 03:30:33,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237722909] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:30:33,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223562103] [2024-11-28 03:30:33,748 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:30:33,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:30:33,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:30:33,751 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:30:33,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:30:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:30:33,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-28 03:30:33,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:30:35,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2024-11-28 03:30:41,282 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 03:30:41,282 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:30:41,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223562103] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:30:41,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:30:41,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2024-11-28 03:30:41,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774498362] [2024-11-28 03:30:41,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:30:41,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 03:30:41,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:30:41,284 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 03:30:41,284 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:30:41,284 INFO L87 Difference]: Start difference. First operand 137 states and 179 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 03:30:45,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:30:49,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:30:54,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:30:58,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:31:02,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:31:06,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:31:06,754 INFO L93 Difference]: Finished difference Result 226 states and 298 transitions. [2024-11-28 03:31:06,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 03:31:06,755 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 74 [2024-11-28 03:31:06,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:31:06,757 INFO L225 Difference]: With dead ends: 226 [2024-11-28 03:31:06,757 INFO L226 Difference]: Without dead ends: 142 [2024-11-28 03:31:06,758 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 58 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2024-11-28 03:31:06,760 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 217 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 54 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:31:06,761 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 411 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 262 Invalid, 5 Unknown, 0 Unchecked, 23.3s Time] [2024-11-28 03:31:06,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-28 03:31:06,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2024-11-28 03:31:06,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 99 states have (on average 1.2424242424242424) internal successors, (123), 103 states have internal predecessors, (123), 26 states have call successors, (26), 11 states have call predecessors, (26), 13 states have return successors, (32), 24 states have call predecessors, (32), 24 states have call successors, (32) [2024-11-28 03:31:06,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 181 transitions. [2024-11-28 03:31:06,798 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 181 transitions. Word has length 74 [2024-11-28 03:31:06,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:31:06,799 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 181 transitions. [2024-11-28 03:31:06,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 03:31:06,799 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 181 transitions. [2024-11-28 03:31:06,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-28 03:31:06,800 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:31:06,801 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:31:06,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 03:31:07,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-28 03:31:07,001 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:31:07,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:31:07,002 INFO L85 PathProgramCache]: Analyzing trace with hash 503272345, now seen corresponding path program 1 times [2024-11-28 03:31:07,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:31:07,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757722325] [2024-11-28 03:31:07,002 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:31:07,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:31:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:31:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 03:31:07,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:31:07,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757722325] [2024-11-28 03:31:07,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757722325] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:31:07,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65313133] [2024-11-28 03:31:07,468 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:31:07,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:31:07,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:31:07,471 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:31:07,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:31:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:31:07,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 03:31:07,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:31:08,649 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 03:31:08,650 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:31:08,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65313133] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:31:08,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:31:08,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2024-11-28 03:31:08,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192387709] [2024-11-28 03:31:08,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:31:08,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:31:08,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:31:08,652 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:31:08,652 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:31:08,652 INFO L87 Difference]: Start difference. First operand 139 states and 181 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-28 03:31:09,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:31:09,519 INFO L93 Difference]: Finished difference Result 296 states and 394 transitions. [2024-11-28 03:31:09,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:31:09,520 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 74 [2024-11-28 03:31:09,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:31:09,522 INFO L225 Difference]: With dead ends: 296 [2024-11-28 03:31:09,522 INFO L226 Difference]: Without dead ends: 175 [2024-11-28 03:31:09,524 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:31:09,525 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 113 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 03:31:09,525 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 198 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 03:31:09,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-28 03:31:09,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2024-11-28 03:31:09,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 130 states have (on average 1.2615384615384615) internal successors, (164), 137 states have internal predecessors, (164), 28 states have call successors, (28), 11 states have call predecessors, (28), 16 states have return successors, (38), 26 states have call predecessors, (38), 26 states have call successors, (38) [2024-11-28 03:31:09,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 230 transitions. [2024-11-28 03:31:09,554 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 230 transitions. Word has length 74 [2024-11-28 03:31:09,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:31:09,554 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 230 transitions. [2024-11-28 03:31:09,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-28 03:31:09,554 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 230 transitions. [2024-11-28 03:31:09,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-28 03:31:09,556 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:31:09,556 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:31:09,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 03:31:09,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 03:31:09,757 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:31:09,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:31:09,757 INFO L85 PathProgramCache]: Analyzing trace with hash 2145638637, now seen corresponding path program 1 times [2024-11-28 03:31:09,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:31:09,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346190278] [2024-11-28 03:31:09,758 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:31:09,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:31:09,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:31:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-28 03:31:10,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:31:10,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346190278] [2024-11-28 03:31:10,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346190278] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:31:10,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983658934] [2024-11-28 03:31:10,505 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:31:10,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:31:10,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:31:10,507 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:31:10,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 03:31:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:31:10,754 INFO L256 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-28 03:31:10,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:31:11,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2024-11-28 03:31:11,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2024-11-28 03:31:11,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:31:11,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2024-11-28 03:31:11,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:31:11,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:31:11,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 40 [2024-11-28 03:31:11,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:31:11,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2024-11-28 03:31:11,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:31:11,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2024-11-28 03:31:12,771 INFO L349 Elim1Store]: treesize reduction 50, result has 18.0 percent of original size [2024-11-28 03:31:12,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 178 treesize of output 178 [2024-11-28 03:31:12,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:31:12,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:31:12,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2024-11-28 03:31:12,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:31:12,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:31:12,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:31:12,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:31:12,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 35 [2024-11-28 03:31:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 03:31:29,405 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:31:31,859 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse2 (+ 16 |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|))) (and (forall ((v_ArrVal_715 (Array Int Int)) (v_ArrVal_716 Int)) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_715))) (store .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_716))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse2) 0)) (forall ((|ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| Int) (v_ArrVal_717 Int)) (= (select (select (let ((.cse3 (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_717)))) (store .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse2) 0)))) is different from false [2024-11-28 03:31:31,985 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:31:31,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 90 [2024-11-28 03:31:32,228 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse2 (+ 16 |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|))) (and (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_14| Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_14| 1)) (forall ((v_ArrVal_715 (Array Int Int)) (v_ArrVal_716 Int)) (= (select (select (let ((.cse0 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_14|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_14| v_ArrVal_715))) (store .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_716))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse2) 0)))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_14| Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_14| 1)) (forall ((v_arrayElimArr_7 (Array Int Int)) (v_subst_1 Int)) (= (select (select (let ((.cse3 (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| 0)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_14| v_arrayElimArr_7))) (store .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_subst_1))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse2) 0)))))) is different from false [2024-11-28 03:31:32,398 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:31:32,403 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:31:33,259 INFO L349 Elim1Store]: treesize reduction 86, result has 45.2 percent of original size [2024-11-28 03:31:33,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 297 treesize of output 284 [2024-11-28 03:31:33,360 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:31:33,368 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:31:34,308 INFO L349 Elim1Store]: treesize reduction 86, result has 45.2 percent of original size [2024-11-28 03:31:34,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 355 treesize of output 342 [2024-11-28 03:31:34,431 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:31:34,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 296 treesize of output 292 [2024-11-28 03:31:34,481 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 245 treesize of output 233 [2024-11-28 03:31:34,633 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:31:34,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 332 treesize of output 314 [2024-11-28 03:31:34,710 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 281 treesize of output 269 [2024-11-28 03:31:34,966 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 8 treesize of output 4 [2024-11-28 03:31:35,226 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 8 treesize of output 4 [2024-11-28 03:31:39,305 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:31:39,310 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:31:39,499 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:31:39,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 139 [2024-11-28 03:31:39,957 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:31:40,087 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:31:40,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 59 [2024-11-28 03:31:41,108 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 1 not checked. [2024-11-28 03:31:41,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983658934] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:31:41,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:31:41,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 9] total 21 [2024-11-28 03:31:41,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958088256] [2024-11-28 03:31:41,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:31:41,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 03:31:41,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:31:41,110 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 03:31:41,110 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=285, Unknown=12, NotChecked=70, Total=420 [2024-11-28 03:31:41,111 INFO L87 Difference]: Start difference. First operand 175 states and 230 transitions. Second operand has 21 states, 20 states have (on average 4.5) internal successors, (90), 19 states have internal predecessors, (90), 7 states have call successors, (23), 3 states have call predecessors, (23), 6 states have return successors, (22), 5 states have call predecessors, (22), 7 states have call successors, (22) [2024-11-28 03:31:46,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:31:51,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:31:59,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:32:03,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.39s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:32:08,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:32:12,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:32:16,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:32:20,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:32:24,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:32:31,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:32:36,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:32:38,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.54s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:32:42,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:32:47,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:32:52,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:32:55,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:32:57,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:33:02,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:33:04,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.74s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:33:08,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:33:13,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:33:17,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:33:18,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:33:23,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:33:27,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:33:31,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:33:35,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:33:36,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:33:36,044 INFO L93 Difference]: Finished difference Result 428 states and 599 transitions. [2024-11-28 03:33:36,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 03:33:36,046 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.5) internal successors, (90), 19 states have internal predecessors, (90), 7 states have call successors, (23), 3 states have call predecessors, (23), 6 states have return successors, (22), 5 states have call predecessors, (22), 7 states have call successors, (22) Word has length 76 [2024-11-28 03:33:36,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:33:36,049 INFO L225 Difference]: With dead ends: 428 [2024-11-28 03:33:36,049 INFO L226 Difference]: Without dead ends: 250 [2024-11-28 03:33:36,051 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=127, Invalid=734, Unknown=17, NotChecked=114, Total=992 [2024-11-28 03:33:36,051 INFO L435 NwaCegarLoop]: 110 mSDtfsCounter, 75 mSDsluCounter, 1126 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 4 mSolverCounterUnsat, 56 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 109.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1236 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 56 IncrementalHoareTripleChecker+Unknown, 315 IncrementalHoareTripleChecker+Unchecked, 109.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:33:36,052 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 1236 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 688 Invalid, 56 Unknown, 315 Unchecked, 109.8s Time] [2024-11-28 03:33:36,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2024-11-28 03:33:36,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 225. [2024-11-28 03:33:36,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 166 states have (on average 1.2710843373493976) internal successors, (211), 175 states have internal predecessors, (211), 39 states have call successors, (39), 13 states have call predecessors, (39), 19 states have return successors, (55), 36 states have call predecessors, (55), 37 states have call successors, (55) [2024-11-28 03:33:36,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 305 transitions. [2024-11-28 03:33:36,120 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 305 transitions. Word has length 76 [2024-11-28 03:33:36,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:33:36,120 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 305 transitions. [2024-11-28 03:33:36,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.5) internal successors, (90), 19 states have internal predecessors, (90), 7 states have call successors, (23), 3 states have call predecessors, (23), 6 states have return successors, (22), 5 states have call predecessors, (22), 7 states have call successors, (22) [2024-11-28 03:33:36,121 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 305 transitions. [2024-11-28 03:33:36,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-28 03:33:36,125 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:33:36,126 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:33:36,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 03:33:36,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-28 03:33:36,330 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:33:36,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:36,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1587789637, now seen corresponding path program 1 times [2024-11-28 03:33:36,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:36,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12388319] [2024-11-28 03:33:36,331 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:33:36,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:36,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:33:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-28 03:33:37,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:37,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12388319] [2024-11-28 03:33:37,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12388319] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:33:37,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5301627] [2024-11-28 03:33:37,189 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:33:37,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:33:37,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:33:37,192 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:33:37,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 03:33:37,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:33:37,531 INFO L256 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-11-28 03:33:37,537 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:33:38,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2024-11-28 03:33:38,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:33:38,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 03:33:38,992 INFO L349 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2024-11-28 03:33:38,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 90 [2024-11-28 03:33:39,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 70 treesize of output 58 [2024-11-28 03:33:39,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:33:39,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 26 [2024-11-28 03:33:43,462 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_36| Int) (|v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset_BEFORE_CALL_25| Int)) (let ((.cse1 (select |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_36|))) (let ((.cse0 (select .cse1 (+ |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset_BEFORE_CALL_25| 24)))) (and (not (= .cse0 0)) (<= (+ .cse0 2) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_36|) (= (select .cse1 |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset_BEFORE_CALL_25|) .cse0))))) is different from true [2024-11-28 03:33:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 03:33:45,562 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:34:09,238 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:34:09,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2024-11-28 03:34:09,435 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:34:09,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 335 treesize of output 309 [2024-11-28 03:34:09,461 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 196 treesize of output 180 [2024-11-28 03:34:10,142 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 8 treesize of output 4 [2024-11-28 03:34:10,196 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 24 treesize of output 20 [2024-11-28 03:34:10,455 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:34:10,456 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 81 treesize of output 73 [2024-11-28 03:34:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 03:34:12,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5301627] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:34:12,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:34:12,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 10] total 23 [2024-11-28 03:34:12,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726323814] [2024-11-28 03:34:12,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:34:12,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 03:34:12,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:34:12,698 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 03:34:12,698 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=395, Unknown=7, NotChecked=40, Total=506 [2024-11-28 03:34:12,699 INFO L87 Difference]: Start difference. First operand 225 states and 305 transitions. Second operand has 23 states, 22 states have (on average 5.181818181818182) internal successors, (114), 21 states have internal predecessors, (114), 7 states have call successors, (23), 3 states have call predecessors, (23), 6 states have return successors, (22), 5 states have call predecessors, (22), 7 states have call successors, (22) [2024-11-28 03:34:18,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:34:23,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:34:32,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:34:43,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:34:47,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:34:51,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:34:55,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:34:59,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:35:03,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:35:07,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:35:11,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:35:15,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:35:32,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:35:36,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:35:40,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:35:44,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:35:48,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:35:52,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:35:56,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:36:00,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:36:04,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:36:08,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:36:12,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:36:16,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:36:21,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:36:25,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:36:29,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:36:33,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:36:37,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:36:41,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:36:45,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:36:49,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:36:53,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:36:57,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:37:01,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:37:05,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:37:09,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:37:13,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:37:17,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:37:21,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:37:25,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:37:29,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:37:33,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:37:37,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:37:41,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:37:45,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:37:49,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:37:53,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:37:57,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:37:57,890 INFO L93 Difference]: Finished difference Result 374 states and 530 transitions. [2024-11-28 03:37:57,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 03:37:57,891 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 5.181818181818182) internal successors, (114), 21 states have internal predecessors, (114), 7 states have call successors, (23), 3 states have call predecessors, (23), 6 states have return successors, (22), 5 states have call predecessors, (22), 7 states have call successors, (22) Word has length 89 [2024-11-28 03:37:57,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:37:57,894 INFO L225 Difference]: With dead ends: 374 [2024-11-28 03:37:57,894 INFO L226 Difference]: Without dead ends: 261 [2024-11-28 03:37:57,896 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 52.3s TimeCoverageRelationStatistics Valid=167, Invalid=1015, Unknown=12, NotChecked=66, Total=1260 [2024-11-28 03:37:57,896 INFO L435 NwaCegarLoop]: 110 mSDtfsCounter, 81 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 11 mSolverCounterUnsat, 48 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 201.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 48 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 201.7s IncrementalHoareTripleChecker+Time [2024-11-28 03:37:57,896 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 1342 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 890 Invalid, 48 Unknown, 222 Unchecked, 201.7s Time] [2024-11-28 03:37:57,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2024-11-28 03:37:57,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 228. [2024-11-28 03:37:57,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 169 states have (on average 1.2662721893491125) internal successors, (214), 178 states have internal predecessors, (214), 39 states have call successors, (39), 13 states have call predecessors, (39), 19 states have return successors, (53), 36 states have call predecessors, (53), 37 states have call successors, (53) [2024-11-28 03:37:57,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 306 transitions. [2024-11-28 03:37:57,931 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 306 transitions. Word has length 89 [2024-11-28 03:37:57,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:37:57,932 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 306 transitions. [2024-11-28 03:37:57,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 5.181818181818182) internal successors, (114), 21 states have internal predecessors, (114), 7 states have call successors, (23), 3 states have call predecessors, (23), 6 states have return successors, (22), 5 states have call predecessors, (22), 7 states have call successors, (22) [2024-11-28 03:37:57,932 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 306 transitions. [2024-11-28 03:37:57,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-28 03:37:57,934 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:37:57,935 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:37:57,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-28 03:37:58,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:37:58,135 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:37:58,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:37:58,136 INFO L85 PathProgramCache]: Analyzing trace with hash -348740771, now seen corresponding path program 1 times [2024-11-28 03:37:58,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:37:58,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147710409] [2024-11-28 03:37:58,136 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:37:58,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:37:58,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:37:59,469 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-28 03:37:59,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:37:59,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147710409] [2024-11-28 03:37:59,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147710409] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:37:59,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748717896] [2024-11-28 03:37:59,469 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:37:59,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:37:59,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:37:59,472 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:37:59,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 03:37:59,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:37:59,709 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:37:59,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:38:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-28 03:38:01,041 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:38:01,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748717896] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:38:01,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:38:01,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2024-11-28 03:38:01,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772218793] [2024-11-28 03:38:01,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:38:01,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:38:01,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:01,042 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:38:01,042 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:38:01,043 INFO L87 Difference]: Start difference. First operand 228 states and 306 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-28 03:38:02,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:02,179 INFO L93 Difference]: Finished difference Result 404 states and 546 transitions. [2024-11-28 03:38:02,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:38:02,180 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 100 [2024-11-28 03:38:02,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:02,182 INFO L225 Difference]: With dead ends: 404 [2024-11-28 03:38:02,182 INFO L226 Difference]: Without dead ends: 192 [2024-11-28 03:38:02,186 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:38:02,187 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 108 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:02,188 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 288 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 03:38:02,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-11-28 03:38:02,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2024-11-28 03:38:02,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 138 states have (on average 1.2391304347826086) internal successors, (171), 145 states have internal predecessors, (171), 37 states have call successors, (37), 12 states have call predecessors, (37), 16 states have return successors, (48), 34 states have call predecessors, (48), 35 states have call successors, (48) [2024-11-28 03:38:02,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 256 transitions. [2024-11-28 03:38:02,222 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 256 transitions. Word has length 100 [2024-11-28 03:38:02,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:02,223 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 256 transitions. [2024-11-28 03:38:02,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-28 03:38:02,223 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 256 transitions. [2024-11-28 03:38:02,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-28 03:38:02,225 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:02,226 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2024-11-28 03:38:02,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 03:38:02,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 03:38:02,426 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:38:02,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:02,427 INFO L85 PathProgramCache]: Analyzing trace with hash -366816056, now seen corresponding path program 1 times [2024-11-28 03:38:02,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:02,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629098669] [2024-11-28 03:38:02,427 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:02,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:03,548 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-28 03:38:03,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:03,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629098669] [2024-11-28 03:38:03,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629098669] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:38:03,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903945546] [2024-11-28 03:38:03,549 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:03,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:38:03,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:38:03,551 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:38:03,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 03:38:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:03,846 INFO L256 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 03:38:03,848 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:38:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 57 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 03:38:04,722 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:38:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-28 03:38:06,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903945546] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:38:06,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:38:06,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 15 [2024-11-28 03:38:06,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205867904] [2024-11-28 03:38:06,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:38:06,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 03:38:06,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:06,818 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 03:38:06,818 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:38:06,818 INFO L87 Difference]: Start difference. First operand 192 states and 256 transitions. Second operand has 15 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 5 states have call successors, (13), 2 states have call predecessors, (13), 7 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2024-11-28 03:38:07,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:07,589 INFO L93 Difference]: Finished difference Result 327 states and 447 transitions. [2024-11-28 03:38:07,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:38:07,590 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 5 states have call successors, (13), 2 states have call predecessors, (13), 7 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 107 [2024-11-28 03:38:07,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:07,592 INFO L225 Difference]: With dead ends: 327 [2024-11-28 03:38:07,592 INFO L226 Difference]: Without dead ends: 204 [2024-11-28 03:38:07,593 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:38:07,593 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:07,594 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 637 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 03:38:07,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-11-28 03:38:07,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 201. [2024-11-28 03:38:07,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 144 states have (on average 1.2291666666666667) internal successors, (177), 154 states have internal predecessors, (177), 37 states have call successors, (37), 12 states have call predecessors, (37), 19 states have return successors, (58), 34 states have call predecessors, (58), 35 states have call successors, (58) [2024-11-28 03:38:07,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 272 transitions. [2024-11-28 03:38:07,641 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 272 transitions. Word has length 107 [2024-11-28 03:38:07,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:07,642 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 272 transitions. [2024-11-28 03:38:07,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 5 states have call successors, (13), 2 states have call predecessors, (13), 7 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2024-11-28 03:38:07,642 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 272 transitions. [2024-11-28 03:38:07,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-28 03:38:07,643 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:07,643 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:07,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-28 03:38:07,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 03:38:07,844 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:38:07,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:07,845 INFO L85 PathProgramCache]: Analyzing trace with hash 276248026, now seen corresponding path program 1 times [2024-11-28 03:38:07,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:07,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53037472] [2024-11-28 03:38:07,846 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:07,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:07,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:11,519 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-28 03:38:11,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:11,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53037472] [2024-11-28 03:38:11,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53037472] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:38:11,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996982039] [2024-11-28 03:38:11,520 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:11,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:38:11,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:38:11,522 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:38:11,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 03:38:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:11,839 INFO L256 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-28 03:38:11,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:38:13,421 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-28 03:38:13,421 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:38:13,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996982039] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:38:13,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:38:13,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14] total 19 [2024-11-28 03:38:13,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694913238] [2024-11-28 03:38:13,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:38:13,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:38:13,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:13,424 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:38:13,424 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2024-11-28 03:38:13,424 INFO L87 Difference]: Start difference. First operand 201 states and 272 transitions. Second operand has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-28 03:38:13,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:13,864 INFO L93 Difference]: Finished difference Result 353 states and 479 transitions. [2024-11-28 03:38:13,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:38:13,865 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 109 [2024-11-28 03:38:13,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:13,867 INFO L225 Difference]: With dead ends: 353 [2024-11-28 03:38:13,867 INFO L226 Difference]: Without dead ends: 201 [2024-11-28 03:38:13,868 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2024-11-28 03:38:13,869 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 0 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:13,869 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 435 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 03:38:13,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-11-28 03:38:13,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2024-11-28 03:38:13,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 144 states have (on average 1.2222222222222223) internal successors, (176), 154 states have internal predecessors, (176), 37 states have call successors, (37), 12 states have call predecessors, (37), 19 states have return successors, (56), 34 states have call predecessors, (56), 35 states have call successors, (56) [2024-11-28 03:38:13,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 269 transitions. [2024-11-28 03:38:13,912 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 269 transitions. Word has length 109 [2024-11-28 03:38:13,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:13,912 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 269 transitions. [2024-11-28 03:38:13,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-28 03:38:13,913 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 269 transitions. [2024-11-28 03:38:13,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-28 03:38:13,915 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:13,915 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 03:38:13,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 03:38:14,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 03:38:14,116 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:38:14,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:14,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1990111480, now seen corresponding path program 2 times [2024-11-28 03:38:14,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:14,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821757901] [2024-11-28 03:38:14,116 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:38:14,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:14,162 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:38:14,162 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:38:15,026 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2024-11-28 03:38:15,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:15,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821757901] [2024-11-28 03:38:15,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821757901] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:38:15,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:38:15,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 03:38:15,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313266095] [2024-11-28 03:38:15,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:38:15,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:38:15,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:15,028 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:38:15,028 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:38:15,028 INFO L87 Difference]: Start difference. First operand 201 states and 269 transitions. Second operand has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2024-11-28 03:38:15,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:15,488 INFO L93 Difference]: Finished difference Result 217 states and 287 transitions. [2024-11-28 03:38:15,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:38:15,488 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 111 [2024-11-28 03:38:15,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:15,490 INFO L225 Difference]: With dead ends: 217 [2024-11-28 03:38:15,490 INFO L226 Difference]: Without dead ends: 215 [2024-11-28 03:38:15,491 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:38:15,491 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 3 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:15,491 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 446 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 03:38:15,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-11-28 03:38:15,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 202. [2024-11-28 03:38:15,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 145 states have (on average 1.2206896551724138) internal successors, (177), 153 states have internal predecessors, (177), 38 states have call successors, (38), 13 states have call predecessors, (38), 18 states have return successors, (51), 35 states have call predecessors, (51), 36 states have call successors, (51) [2024-11-28 03:38:15,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 266 transitions. [2024-11-28 03:38:15,534 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 266 transitions. Word has length 111 [2024-11-28 03:38:15,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:15,535 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 266 transitions. [2024-11-28 03:38:15,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2024-11-28 03:38:15,536 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 266 transitions. [2024-11-28 03:38:15,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-28 03:38:15,537 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:15,537 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:38:15,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-28 03:38:15,537 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:38:15,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:15,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1475396767, now seen corresponding path program 1 times [2024-11-28 03:38:15,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:15,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619504849] [2024-11-28 03:38:15,538 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:15,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-28 03:38:16,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:16,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619504849] [2024-11-28 03:38:16,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619504849] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:38:16,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990344868] [2024-11-28 03:38:16,961 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:16,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:38:16,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:38:16,964 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:38:16,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 03:38:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:17,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-28 03:38:17,288 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:38:17,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 03:38:17,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 03:38:24,571 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_2| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_2| Int)) (not (= (select (select |c_#memory_$Pointer$#1.offset| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_2|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_2|) 0))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_2| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_2| Int)) (not (= (select (select |c_#memory_$Pointer$#1.base| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_2|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_2|) 0)))) is different from true [2024-11-28 03:38:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 03:38:25,510 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:38:26,593 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-28 03:38:26,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990344868] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:38:26,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:38:26,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 8] total 19 [2024-11-28 03:38:26,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56392682] [2024-11-28 03:38:26,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:38:26,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 03:38:26,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:26,595 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 03:38:26,595 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=260, Unknown=1, NotChecked=32, Total=342 [2024-11-28 03:38:26,595 INFO L87 Difference]: Start difference. First operand 202 states and 266 transitions. Second operand has 19 states, 18 states have (on average 5.944444444444445) internal successors, (107), 19 states have internal predecessors, (107), 7 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2024-11-28 03:38:31,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:31,669 INFO L93 Difference]: Finished difference Result 495 states and 705 transitions. [2024-11-28 03:38:31,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 03:38:31,670 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.944444444444445) internal successors, (107), 19 states have internal predecessors, (107), 7 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 106 [2024-11-28 03:38:31,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:31,674 INFO L225 Difference]: With dead ends: 495 [2024-11-28 03:38:31,674 INFO L226 Difference]: Without dead ends: 341 [2024-11-28 03:38:31,676 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=73, Invalid=392, Unknown=1, NotChecked=40, Total=506 [2024-11-28 03:38:31,676 INFO L435 NwaCegarLoop]: 71 mSDtfsCounter, 51 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:31,676 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 819 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 472 Invalid, 0 Unknown, 281 Unchecked, 4.3s Time] [2024-11-28 03:38:31,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2024-11-28 03:38:31,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 260. [2024-11-28 03:38:31,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 196 states have (on average 1.25) internal successors, (245), 204 states have internal predecessors, (245), 42 states have call successors, (42), 16 states have call predecessors, (42), 21 states have return successors, (59), 39 states have call predecessors, (59), 40 states have call successors, (59) [2024-11-28 03:38:31,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 346 transitions. [2024-11-28 03:38:31,730 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 346 transitions. Word has length 106 [2024-11-28 03:38:31,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:31,730 INFO L471 AbstractCegarLoop]: Abstraction has 260 states and 346 transitions. [2024-11-28 03:38:31,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 5.944444444444445) internal successors, (107), 19 states have internal predecessors, (107), 7 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2024-11-28 03:38:31,731 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 346 transitions. [2024-11-28 03:38:31,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-28 03:38:31,732 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:31,733 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:31,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 03:38:31,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 03:38:31,933 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:38:31,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:31,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1088146527, now seen corresponding path program 1 times [2024-11-28 03:38:31,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:31,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744171203] [2024-11-28 03:38:31,934 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:31,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-28 03:38:32,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:32,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744171203] [2024-11-28 03:38:32,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744171203] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:38:32,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488915180] [2024-11-28 03:38:32,197 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:32,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:38:32,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:38:32,199 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:38:32,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 03:38:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:32,503 INFO L256 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 03:38:32,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:38:32,556 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-11-28 03:38:32,556 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:38:32,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488915180] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:38:32,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:38:32,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2024-11-28 03:38:32,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174822267] [2024-11-28 03:38:32,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:38:32,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:38:32,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:32,558 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:38:32,558 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:38:32,559 INFO L87 Difference]: Start difference. First operand 260 states and 346 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-28 03:38:32,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:32,803 INFO L93 Difference]: Finished difference Result 394 states and 554 transitions. [2024-11-28 03:38:32,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:38:32,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 106 [2024-11-28 03:38:32,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:32,806 INFO L225 Difference]: With dead ends: 394 [2024-11-28 03:38:32,806 INFO L226 Difference]: Without dead ends: 252 [2024-11-28 03:38:32,808 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:38:32,808 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 0 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:32,808 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 228 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:38:32,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-11-28 03:38:32,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2024-11-28 03:38:32,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 188 states have (on average 1.2393617021276595) internal successors, (233), 196 states have internal predecessors, (233), 42 states have call successors, (42), 16 states have call predecessors, (42), 21 states have return successors, (59), 39 states have call predecessors, (59), 40 states have call successors, (59) [2024-11-28 03:38:32,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 334 transitions. [2024-11-28 03:38:32,844 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 334 transitions. Word has length 106 [2024-11-28 03:38:32,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:32,844 INFO L471 AbstractCegarLoop]: Abstraction has 252 states and 334 transitions. [2024-11-28 03:38:32,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-28 03:38:32,844 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 334 transitions. [2024-11-28 03:38:32,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-28 03:38:32,846 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:32,846 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:32,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 03:38:33,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 03:38:33,050 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:38:33,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:33,051 INFO L85 PathProgramCache]: Analyzing trace with hash 463092705, now seen corresponding path program 1 times [2024-11-28 03:38:33,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:33,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318977780] [2024-11-28 03:38:33,051 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:33,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:33,450 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-28 03:38:33,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:33,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318977780] [2024-11-28 03:38:33,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318977780] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:38:33,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075126178] [2024-11-28 03:38:33,451 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:33,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:38:33,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:38:33,454 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:38:33,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 03:38:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:33,777 INFO L256 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 03:38:33,779 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:38:33,815 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-28 03:38:33,816 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:38:33,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075126178] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:38:33,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:38:33,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2024-11-28 03:38:33,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880924011] [2024-11-28 03:38:33,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:38:33,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:38:33,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:33,817 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:38:33,817 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:38:33,817 INFO L87 Difference]: Start difference. First operand 252 states and 334 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-28 03:38:33,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:33,997 INFO L93 Difference]: Finished difference Result 379 states and 526 transitions. [2024-11-28 03:38:33,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:38:33,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 106 [2024-11-28 03:38:33,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:34,000 INFO L225 Difference]: With dead ends: 379 [2024-11-28 03:38:34,000 INFO L226 Difference]: Without dead ends: 223 [2024-11-28 03:38:34,001 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:38:34,002 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 1 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:34,002 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 227 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:38:34,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-11-28 03:38:34,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 220. [2024-11-28 03:38:34,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 159 states have (on average 1.1949685534591195) internal successors, (190), 166 states have internal predecessors, (190), 40 states have call successors, (40), 16 states have call predecessors, (40), 20 states have return successors, (52), 37 states have call predecessors, (52), 38 states have call successors, (52) [2024-11-28 03:38:34,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 282 transitions. [2024-11-28 03:38:34,044 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 282 transitions. Word has length 106 [2024-11-28 03:38:34,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:34,044 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 282 transitions. [2024-11-28 03:38:34,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-28 03:38:34,045 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 282 transitions. [2024-11-28 03:38:34,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-28 03:38:34,047 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:34,047 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:38:34,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 03:38:34,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:38:34,248 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:38:34,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:34,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1933557793, now seen corresponding path program 1 times [2024-11-28 03:38:34,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:34,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929402730] [2024-11-28 03:38:34,248 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:34,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:37,104 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-28 03:38:37,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:37,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929402730] [2024-11-28 03:38:37,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929402730] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:38:37,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768109299] [2024-11-28 03:38:37,104 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:37,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:38:37,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:38:37,108 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:38:37,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 03:38:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:37,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-28 03:38:37,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:38:38,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2024-11-28 03:38:38,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:38:38,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 03:38:39,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:38:39,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 18 [2024-11-28 03:38:45,908 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 57 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 03:38:45,908 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:38:50,488 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:38:50,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2024-11-28 03:38:50,539 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:38:50,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2024-11-28 03:38:50,740 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:38:50,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 267 [2024-11-28 03:38:50,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 176 [2024-11-28 03:38:51,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-11-28 03:38:51,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-11-28 03:38:51,857 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:38:51,857 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 23 treesize of output 27 [2024-11-28 03:38:52,097 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:38:52,097 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 80 treesize of output 82 [2024-11-28 03:38:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 13 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-28 03:38:54,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768109299] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:38:54,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:38:54,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 33 [2024-11-28 03:38:54,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143285280] [2024-11-28 03:38:54,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:38:54,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 03:38:54,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:54,717 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 03:38:54,718 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 03:38:54,718 INFO L87 Difference]: Start difference. First operand 220 states and 282 transitions. Second operand has 33 states, 31 states have (on average 5.193548387096774) internal successors, (161), 33 states have internal predecessors, (161), 14 states have call successors, (27), 3 states have call predecessors, (27), 6 states have return successors, (26), 11 states have call predecessors, (26), 14 states have call successors, (26) [2024-11-28 03:39:10,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:39:10,940 INFO L93 Difference]: Finished difference Result 352 states and 465 transitions. [2024-11-28 03:39:10,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 03:39:10,941 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 5.193548387096774) internal successors, (161), 33 states have internal predecessors, (161), 14 states have call successors, (27), 3 states have call predecessors, (27), 6 states have return successors, (26), 11 states have call predecessors, (26), 14 states have call successors, (26) Word has length 108 [2024-11-28 03:39:10,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:39:10,944 INFO L225 Difference]: With dead ends: 352 [2024-11-28 03:39:10,944 INFO L226 Difference]: Without dead ends: 251 [2024-11-28 03:39:10,945 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 199 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=177, Invalid=1463, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 03:39:10,946 INFO L435 NwaCegarLoop]: 115 mSDtfsCounter, 105 mSDsluCounter, 1969 mSDsCounter, 0 mSdLazyCounter, 1412 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 2084 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:39:10,946 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 2084 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1412 Invalid, 0 Unknown, 0 Unchecked, 13.9s Time] [2024-11-28 03:39:10,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-11-28 03:39:10,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 226. [2024-11-28 03:39:10,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 164 states have (on average 1.1890243902439024) internal successors, (195), 171 states have internal predecessors, (195), 40 states have call successors, (40), 17 states have call predecessors, (40), 21 states have return successors, (52), 37 states have call predecessors, (52), 38 states have call successors, (52) [2024-11-28 03:39:10,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 287 transitions. [2024-11-28 03:39:10,987 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 287 transitions. Word has length 108 [2024-11-28 03:39:10,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:39:10,987 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 287 transitions. [2024-11-28 03:39:10,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 5.193548387096774) internal successors, (161), 33 states have internal predecessors, (161), 14 states have call successors, (27), 3 states have call predecessors, (27), 6 states have return successors, (26), 11 states have call predecessors, (26), 14 states have call successors, (26) [2024-11-28 03:39:10,987 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 287 transitions. [2024-11-28 03:39:10,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-11-28 03:39:10,989 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:39:10,989 INFO L218 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2024-11-28 03:39:11,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-28 03:39:11,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:39:11,190 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:39:11,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:39:11,191 INFO L85 PathProgramCache]: Analyzing trace with hash -73683362, now seen corresponding path program 1 times [2024-11-28 03:39:11,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:39:11,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415432297] [2024-11-28 03:39:11,191 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:39:11,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:39:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 03:39:11,291 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-28 03:39:11,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 03:39:11,410 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-28 03:39:11,410 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-28 03:39:11,411 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-28 03:39:11,414 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-28 03:39:11,417 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:39:11,486 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-28 03:39:11,489 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:39:11 BoogieIcfgContainer [2024-11-28 03:39:11,489 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-28 03:39:11,490 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-28 03:39:11,490 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-28 03:39:11,491 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-28 03:39:11,491 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:29:05" (3/4) ... [2024-11-28 03:39:11,492 INFO L140 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-28 03:39:11,603 INFO L129 tionWitnessGenerator]: Generated YAML witness of length 58. [2024-11-28 03:39:11,697 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/witness.graphml [2024-11-28 03:39:11,697 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/witness.yml [2024-11-28 03:39:11,697 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-28 03:39:11,698 INFO L158 Benchmark]: Toolchain (without parser) took 609886.36ms. Allocated memory was 117.4MB in the beginning and 343.9MB in the end (delta: 226.5MB). Free memory was 85.7MB in the beginning and 285.9MB in the end (delta: -200.2MB). Peak memory consumption was 209.6MB. Max. memory is 16.1GB. [2024-11-28 03:39:11,698 INFO L158 Benchmark]: CDTParser took 0.43ms. Allocated memory is still 117.4MB. Free memory is still 72.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:39:11,699 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2880.82ms. Allocated memory was 117.4MB in the beginning and 234.9MB in the end (delta: 117.4MB). Free memory was 85.7MB in the beginning and 174.7MB in the end (delta: -89.1MB). Peak memory consumption was 72.9MB. Max. memory is 16.1GB. [2024-11-28 03:39:11,699 INFO L158 Benchmark]: Boogie Procedure Inliner took 113.98ms. Allocated memory is still 234.9MB. Free memory was 174.7MB in the beginning and 169.5MB in the end (delta: 5.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:39:11,699 INFO L158 Benchmark]: Boogie Preprocessor took 106.32ms. Allocated memory is still 234.9MB. Free memory was 169.5MB in the beginning and 165.7MB in the end (delta: 3.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 03:39:11,699 INFO L158 Benchmark]: RCFGBuilder took 780.22ms. Allocated memory is still 234.9MB. Free memory was 165.7MB in the beginning and 140.5MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-11-28 03:39:11,699 INFO L158 Benchmark]: TraceAbstraction took 605790.17ms. Allocated memory was 234.9MB in the beginning and 343.9MB in the end (delta: 109.1MB). Free memory was 140.5MB in the beginning and 105.7MB in the end (delta: 34.8MB). Peak memory consumption was 138.3MB. Max. memory is 16.1GB. [2024-11-28 03:39:11,700 INFO L158 Benchmark]: Witness Printer took 207.36ms. Allocated memory is still 343.9MB. Free memory was 105.7MB in the beginning and 285.9MB in the end (delta: -180.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 03:39:11,701 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43ms. Allocated memory is still 117.4MB. Free memory is still 72.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2880.82ms. Allocated memory was 117.4MB in the beginning and 234.9MB in the end (delta: 117.4MB). Free memory was 85.7MB in the beginning and 174.7MB in the end (delta: -89.1MB). Peak memory consumption was 72.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 113.98ms. Allocated memory is still 234.9MB. Free memory was 174.7MB in the beginning and 169.5MB in the end (delta: 5.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 106.32ms. Allocated memory is still 234.9MB. Free memory was 169.5MB in the beginning and 165.7MB in the end (delta: 3.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 780.22ms. Allocated memory is still 234.9MB. Free memory was 165.7MB in the beginning and 140.5MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 605790.17ms. Allocated memory was 234.9MB in the beginning and 343.9MB in the end (delta: 109.1MB). Free memory was 140.5MB in the beginning and 105.7MB in the end (delta: 34.8MB). Peak memory consumption was 138.3MB. Max. memory is 16.1GB. * Witness Printer took 207.36ms. Allocated memory is still 343.9MB. Free memory was 105.7MB in the beginning and 285.9MB in the end (delta: -180.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 223]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L6901-L6906] static struct aws_allocator s_can_fail_allocator_static = { .mem_acquire = s_can_fail_malloc_allocator, .mem_release = s_can_fail_free_allocator, .mem_realloc = s_can_fail_realloc_allocator, .mem_calloc = s_can_fail_calloc_allocator, }; [L6901-L6906] static struct aws_allocator s_can_fail_allocator_static = { .mem_acquire = s_can_fail_malloc_allocator, .mem_release = s_can_fail_free_allocator, .mem_realloc = s_can_fail_realloc_allocator, .mem_calloc = s_can_fail_calloc_allocator, }; [L6901-L6906] static struct aws_allocator s_can_fail_allocator_static = { .mem_acquire = s_can_fail_malloc_allocator, .mem_release = s_can_fail_free_allocator, .mem_realloc = s_can_fail_realloc_allocator, .mem_calloc = s_can_fail_calloc_allocator, }; [L6901-L6906] static struct aws_allocator s_can_fail_allocator_static = { .mem_acquire = s_can_fail_malloc_allocator, .mem_release = s_can_fail_free_allocator, .mem_realloc = s_can_fail_realloc_allocator, .mem_calloc = s_can_fail_calloc_allocator, }; [L6901-L6906] static struct aws_allocator s_can_fail_allocator_static = { .mem_acquire = s_can_fail_malloc_allocator, .mem_release = s_can_fail_free_allocator, .mem_realloc = s_can_fail_realloc_allocator, .mem_calloc = s_can_fail_calloc_allocator, }; [L6901-L6906] static struct aws_allocator s_can_fail_allocator_static = { .mem_acquire = s_can_fail_malloc_allocator, .mem_release = s_can_fail_free_allocator, .mem_realloc = s_can_fail_realloc_allocator, .mem_calloc = s_can_fail_calloc_allocator, }; [L7326] static __thread int tl_last_error = 0; VAL [s_can_fail_allocator_static={4:0}, tl_last_error=0] [L7360] CALL aws_linked_list_rend_harness() [L7344] struct aws_linked_list list; [L7346] CALL ensure_linked_list_is_allocated(&list, 20) [L6743] CALL, EXPR nondet_uint64_t() VAL [s_can_fail_allocator_static={4:0}, tl_last_error=0] [L266] return __VERIFIER_nondet_ulong(); [L6743] RET, EXPR nondet_uint64_t() VAL [list={7:0}, max_length=20, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L6743] size_t length = nondet_uint64_t(); [L6744] CALL assume_abort_if_not(length <= max_length) VAL [\old(cond)=1, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L211] COND FALSE !(!cond) VAL [\old(cond)=1, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L6744] RET assume_abort_if_not(length <= max_length) VAL [length=-((__int128) 1 << 64), list={7:0}, max_length=20, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L6746-L6747] list->head.prev = ((void *)0) [L6749-L6750] list->tail.next = ((void *)0) [L6753] struct aws_linked_list_node *curr = &list->head; [L6755] size_t i = 0; VAL [curr={7:0}, i=0, length=-((__int128) 1 << 64), list={7:0}, max_length=20, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L6755] COND FALSE !(i < length) VAL [curr={7:0}, list={7:0}, max_length=20, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L6764] curr->next = &list->tail [L6765] list->tail.prev = curr VAL [s_can_fail_allocator_static={4:0}, tl_last_error=0] [L7346] RET ensure_linked_list_is_allocated(&list, 20) [L7349] CALL, EXPR aws_linked_list_is_valid(&list) VAL [s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694] EXPR list && list->head.next VAL [\old(list)={7:0}, list={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694] EXPR list && list->head.next [L4694] EXPR list->head.next [L4694] EXPR list && list->head.next VAL [\old(list)={7:0}, list={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) VAL [\old(list)={7:0}, list={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) [L4694] EXPR list->head.prev [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) VAL [\old(list)={7:0}, list={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev VAL [\old(list)={7:0}, list={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev [L4696] EXPR list->tail.prev [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev VAL [\old(list)={7:0}, list={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) VAL [\old(list)={7:0}, list={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4696] EXPR list->tail.next [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) VAL [\old(list)={7:0}, list={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4697] COND TRUE list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4700] CALL, EXPR aws_linked_list_is_valid_deep(list) [L4734] COND FALSE !(!list) [L4740] const struct aws_linked_list_node *temp = &list->head; [L4743-L4746] _Bool head_reaches_tail = 0 ; VAL [head_reaches_tail=0, list={7:0}, s_can_fail_allocator_static={4:0}, temp={7:0}, tl_last_error=0] [L4750] COND TRUE \read(*temp) VAL [head_reaches_tail=0, list={7:0}, s_can_fail_allocator_static={4:0}, temp={7:0}, tl_last_error=0] [L4751] COND FALSE !(temp == &list->tail) VAL [head_reaches_tail=0, list={7:0}, s_can_fail_allocator_static={4:0}, temp={7:0}, tl_last_error=0] [L4756] CALL, EXPR aws_linked_list_node_next_is_valid(temp) VAL [\old(node)={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4718] EXPR node && node->next VAL [\old(node)={7:0}, node={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4718] EXPR node && node->next [L4718] EXPR node->next [L4718] EXPR node && node->next VAL [\old(node)={7:0}, node={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4718] EXPR node && node->next && node->next->prev == node VAL [\old(node)={7:0}, node={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4718] EXPR node && node->next && node->next->prev == node [L4718] EXPR node->next [L4718] EXPR node->next->prev [L4718] EXPR node && node->next && node->next->prev == node VAL [\old(node)={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4718] return node && node->next && node->next->prev == node; [L4756] RET, EXPR aws_linked_list_node_next_is_valid(temp) VAL [head_reaches_tail=0, list={7:0}, s_can_fail_allocator_static={4:0}, temp={7:0}, tl_last_error=0] [L4756] COND FALSE !(!aws_linked_list_node_next_is_valid(temp)) [L4762] EXPR temp->next [L4762] temp = temp->next [L4750] COND TRUE \read(*temp) VAL [head_reaches_tail=0, list={7:0}, s_can_fail_allocator_static={4:0}, temp={7:16}, tl_last_error=0] [L4751] COND TRUE temp == &list->tail [L4752-L4753] head_reaches_tail = 1 VAL [head_reaches_tail=1, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4764] return head_reaches_tail; VAL [\result=1, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4700] RET, EXPR aws_linked_list_is_valid_deep(list) [L4700] return aws_linked_list_is_valid_deep(list); [L7349] RET, EXPR aws_linked_list_is_valid(&list) VAL [list={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L7349] CALL assume_abort_if_not(aws_linked_list_is_valid(&list)) VAL [\old(cond)=1, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L211] COND FALSE !(!cond) VAL [\old(cond)=1, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L7349] RET assume_abort_if_not(aws_linked_list_is_valid(&list)) VAL [list={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L7354] CALL aws_linked_list_rend(&list) [L4824] CALL, EXPR aws_linked_list_is_valid(list) VAL [s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694] EXPR list && list->head.next VAL [\old(list)={7:0}, list={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694] EXPR list && list->head.next [L4694] EXPR list->head.next [L4694] EXPR list && list->head.next VAL [\old(list)={7:0}, list={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) VAL [\old(list)={7:0}, list={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) [L4694] EXPR list->head.prev [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) VAL [\old(list)={7:0}, list={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev VAL [\old(list)={7:0}, list={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev [L4696] EXPR list->tail.prev [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev VAL [\old(list)={7:0}, list={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) VAL [\old(list)={7:0}, list={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4696] EXPR list->tail.next [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) VAL [\old(list)={7:0}, list={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4697] COND TRUE list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4700] CALL, EXPR aws_linked_list_is_valid_deep(list) [L4734] COND FALSE !(!list) [L4740] const struct aws_linked_list_node *temp = &list->head; [L4743-L4746] _Bool head_reaches_tail = 0 ; VAL [head_reaches_tail=0, list={7:0}, s_can_fail_allocator_static={4:0}, temp={7:0}, tl_last_error=0] [L4750] COND TRUE \read(*temp) VAL [head_reaches_tail=0, list={7:0}, s_can_fail_allocator_static={4:0}, temp={7:0}, tl_last_error=0] [L4751] COND FALSE !(temp == &list->tail) VAL [head_reaches_tail=0, list={7:0}, s_can_fail_allocator_static={4:0}, temp={7:0}, tl_last_error=0] [L4756] CALL, EXPR aws_linked_list_node_next_is_valid(temp) VAL [\old(node)={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4718] EXPR node && node->next VAL [\old(node)={7:0}, node={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4718] EXPR node && node->next [L4718] EXPR node->next [L4718] EXPR node && node->next VAL [\old(node)={7:0}, node={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4718] EXPR node && node->next && node->next->prev == node VAL [\old(node)={7:0}, node={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4718] EXPR node && node->next && node->next->prev == node [L4718] EXPR node->next [L4718] EXPR node->next->prev [L4718] EXPR node && node->next && node->next->prev == node VAL [\old(node)={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4718] return node && node->next && node->next->prev == node; [L4756] RET, EXPR aws_linked_list_node_next_is_valid(temp) VAL [head_reaches_tail=0, list={7:0}, s_can_fail_allocator_static={4:0}, temp={7:0}, tl_last_error=0] [L4756] COND FALSE !(!aws_linked_list_node_next_is_valid(temp)) [L4762] EXPR temp->next [L4762] temp = temp->next [L4750] COND TRUE \read(*temp) VAL [head_reaches_tail=0, list={7:0}, s_can_fail_allocator_static={4:0}, temp={7:16}, tl_last_error=0] [L4751] COND TRUE temp == &list->tail [L4752-L4753] head_reaches_tail = 1 VAL [head_reaches_tail=1, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4764] return head_reaches_tail; VAL [\result=1, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4700] RET, EXPR aws_linked_list_is_valid_deep(list) [L4700] return aws_linked_list_is_valid_deep(list); [L4824] RET, EXPR aws_linked_list_is_valid(list) VAL [list={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4824] CALL assume_abort_if_not((aws_linked_list_is_valid(list))) VAL [\old(cond)=1, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L211] COND FALSE !(!cond) VAL [\old(cond)=1, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4824] RET assume_abort_if_not((aws_linked_list_is_valid(list))) VAL [list={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4825] const struct aws_linked_list_node *rval = &list->head; VAL [list={7:0}, rval={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4826] CALL, EXPR aws_linked_list_is_valid(list) VAL [s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694] EXPR list && list->head.next VAL [\old(list)={7:0}, list={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694] EXPR list && list->head.next [L4694] EXPR list->head.next [L4694] EXPR list && list->head.next VAL [\old(list)={7:0}, list={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) VAL [\old(list)={7:0}, list={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) [L4694] EXPR list->head.prev [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) VAL [\old(list)={7:0}, list={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev VAL [\old(list)={7:0}, list={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev [L4696] EXPR list->tail.prev [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev VAL [\old(list)={7:0}, list={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) VAL [\old(list)={7:0}, list={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4696] EXPR list->tail.next [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) VAL [\old(list)={7:0}, list={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4697] COND TRUE list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4700] CALL, EXPR aws_linked_list_is_valid_deep(list) [L4734] COND FALSE !(!list) [L4740] const struct aws_linked_list_node *temp = &list->head; [L4743-L4746] _Bool head_reaches_tail = 0 ; VAL [head_reaches_tail=0, list={7:0}, s_can_fail_allocator_static={4:0}, temp={7:0}, tl_last_error=0] [L4750] COND TRUE \read(*temp) VAL [head_reaches_tail=0, list={7:0}, s_can_fail_allocator_static={4:0}, temp={7:0}, tl_last_error=0] [L4751] COND FALSE !(temp == &list->tail) VAL [head_reaches_tail=0, list={7:0}, s_can_fail_allocator_static={4:0}, temp={7:0}, tl_last_error=0] [L4756] CALL, EXPR aws_linked_list_node_next_is_valid(temp) VAL [\old(node)={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4718] EXPR node && node->next VAL [\old(node)={7:0}, node={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4718] EXPR node && node->next [L4718] EXPR node->next [L4718] EXPR node && node->next VAL [\old(node)={7:0}, node={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4718] EXPR node && node->next && node->next->prev == node VAL [\old(node)={7:0}, node={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4718] EXPR node && node->next && node->next->prev == node [L4718] EXPR node->next [L4718] EXPR node->next->prev [L4718] EXPR node && node->next && node->next->prev == node VAL [\old(node)={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4718] return node && node->next && node->next->prev == node; [L4756] RET, EXPR aws_linked_list_node_next_is_valid(temp) VAL [head_reaches_tail=0, list={7:0}, s_can_fail_allocator_static={4:0}, temp={7:0}, tl_last_error=0] [L4756] COND FALSE !(!aws_linked_list_node_next_is_valid(temp)) [L4762] EXPR temp->next [L4762] temp = temp->next [L4750] COND TRUE \read(*temp) VAL [head_reaches_tail=0, list={7:0}, s_can_fail_allocator_static={4:0}, temp={7:16}, tl_last_error=0] [L4751] COND TRUE temp == &list->tail [L4752-L4753] head_reaches_tail = 1 VAL [head_reaches_tail=1, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4764] return head_reaches_tail; VAL [\result=1, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4700] RET, EXPR aws_linked_list_is_valid_deep(list) [L4700] return aws_linked_list_is_valid_deep(list); [L4826] RET, EXPR aws_linked_list_is_valid(list) VAL [list={7:0}, rval={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4826] CALL __VERIFIER_assert(!((aws_linked_list_is_valid(list)))) VAL [\old(cond)=0, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L223] COND TRUE !cond VAL [\old(cond)=0, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L223] reach_error() VAL [\old(cond)=0, s_can_fail_allocator_static={4:0}, tl_last_error=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 68 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 605.6s, OverallIterations: 21, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 443.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 116 mSolverCounterUnknown, 1416 SdHoareTripleChecker+Valid, 400.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1339 mSDsluCounter, 11195 SdHoareTripleChecker+Invalid, 396.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 818 IncrementalHoareTripleChecker+Unchecked, 9648 mSDsCounter, 408 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5256 IncrementalHoareTripleChecker+Invalid, 6598 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 408 mSolverCounterUnsat, 1547 mSDtfsCounter, 5256 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2200 GetRequests, 1839 SyntacticMatches, 34 SemanticMatches, 327 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 131.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=260occurred in iteration=17, InterpolantAutomatonStates: 211, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 20 MinimizatonAttempts, 225 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 152.0s InterpolantComputationTime, 3330 NumberOfCodeBlocks, 3261 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 3658 ConstructedInterpolants, 248 QuantifiedInterpolants, 16676 SizeOfPredicates, 62 NumberOfNonLiveVariables, 6787 ConjunctsInSsa, 504 ConjunctsInUnsatCore, 42 InterpolantComputations, 15 PerfectInterpolantSequences, 2088/2437 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-11-28 03:39:11,914 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forcibly destroying the process [2024-11-28 03:39:12,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a772dc-29fa-4655-8034-bab04d4aecaf/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE