./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_loop-simple/recursified_nested_6.c --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/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_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_loop-simple/recursified_nested_6.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/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 32bit --witnessprinter.graph.data.programhash 76648bc32cf18f500eee0df5c8487c6c0f67ad1050d870973d578953c78cde5c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 02:44:26,565 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 02:44:26,658 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 02:44:26,668 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 02:44:26,668 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 02:44:26,708 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 02:44:26,709 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 02:44:26,709 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 02:44:26,711 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 02:44:26,711 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 02:44:26,712 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 02:44:26,712 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 02:44:26,713 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 02:44:26,713 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 02:44:26,714 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 02:44:26,714 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 02:44:26,714 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 02:44:26,715 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 02:44:26,715 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 02:44:26,715 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 02:44:26,715 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 02:44:26,715 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 02:44:26,715 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 02:44:26,715 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 02:44:26,715 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 02:44:26,715 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 02:44:26,716 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 02:44:26,716 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 02:44:26,716 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 02:44:26,716 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:44:26,716 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:44:26,717 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:44:26,717 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:44:26,717 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 02:44:26,717 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:44:26,717 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:44:26,717 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:44:26,717 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:44:26,718 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 02:44:26,718 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 02:44:26,718 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 02:44:26,718 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 02:44:26,718 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 02:44:26,718 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 02:44:26,718 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 02:44:26,718 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 02:44:26,718 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 02:44:26,718 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 02:44:26,718 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_b2f4e227-cffc-4856-a71f-1586a157ac9d/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 -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 76648bc32cf18f500eee0df5c8487c6c0f67ad1050d870973d578953c78cde5c [2024-11-28 02:44:27,091 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 02:44:27,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 02:44:27,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 02:44:27,112 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 02:44:27,112 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 02:44:27,115 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/recursified_loop-simple/recursified_nested_6.c [2024-11-28 02:44:30,485 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/data/502b943e6/eebcb9ee130d405fb7d6bfdc2594c738/FLAG2644cbf7f [2024-11-28 02:44:30,791 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 02:44:30,795 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/sv-benchmarks/c/recursified_loop-simple/recursified_nested_6.c [2024-11-28 02:44:30,807 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/data/502b943e6/eebcb9ee130d405fb7d6bfdc2594c738/FLAG2644cbf7f [2024-11-28 02:44:31,075 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/data/502b943e6/eebcb9ee130d405fb7d6bfdc2594c738 [2024-11-28 02:44:31,078 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 02:44:31,079 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 02:44:31,081 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 02:44:31,081 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 02:44:31,086 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 02:44:31,087 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:44:31" (1/1) ... [2024-11-28 02:44:31,090 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5163f6cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:31, skipping insertion in model container [2024-11-28 02:44:31,091 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:44:31" (1/1) ... [2024-11-28 02:44:31,114 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 02:44:31,311 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_b2f4e227-cffc-4856-a71f-1586a157ac9d/sv-benchmarks/c/recursified_loop-simple/recursified_nested_6.c[2667,2680] [2024-11-28 02:44:31,316 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:44:31,326 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 02:44:31,350 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_b2f4e227-cffc-4856-a71f-1586a157ac9d/sv-benchmarks/c/recursified_loop-simple/recursified_nested_6.c[2667,2680] [2024-11-28 02:44:31,351 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:44:31,366 INFO L204 MainTranslator]: Completed translation [2024-11-28 02:44:31,367 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:31 WrapperNode [2024-11-28 02:44:31,367 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 02:44:31,368 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 02:44:31,369 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 02:44:31,369 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 02:44:31,376 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:31" (1/1) ... [2024-11-28 02:44:31,384 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:31" (1/1) ... [2024-11-28 02:44:31,403 INFO L138 Inliner]: procedures = 15, calls = 51, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 87 [2024-11-28 02:44:31,404 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 02:44:31,408 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 02:44:31,408 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 02:44:31,408 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 02:44:31,419 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:31" (1/1) ... [2024-11-28 02:44:31,420 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:31" (1/1) ... [2024-11-28 02:44:31,423 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:31" (1/1) ... [2024-11-28 02:44:31,443 INFO L175 MemorySlicer]: Split 26 memory accesses to 5 slices as follows [2, 6, 6, 6, 6]. 23 percent of accesses are in the largest equivalence class. The 6 initializations are split as follows [2, 1, 1, 1, 1]. The 8 writes are split as follows [0, 2, 2, 2, 2]. [2024-11-28 02:44:31,443 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:31" (1/1) ... [2024-11-28 02:44:31,443 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:31" (1/1) ... [2024-11-28 02:44:31,451 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:31" (1/1) ... [2024-11-28 02:44:31,452 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:31" (1/1) ... [2024-11-28 02:44:31,456 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:31" (1/1) ... [2024-11-28 02:44:31,457 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:31" (1/1) ... [2024-11-28 02:44:31,459 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:31" (1/1) ... [2024-11-28 02:44:31,461 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 02:44:31,462 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 02:44:31,462 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 02:44:31,463 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 02:44:31,464 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:31" (1/1) ... [2024-11-28 02:44:31,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:44:31,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:44:31,513 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 02:44:31,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 02:44:31,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 02:44:31,541 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_28_to_28_0 [2024-11-28 02:44:31,541 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_28_to_28_0 [2024-11-28 02:44:31,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 02:44:31,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 02:44:31,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-28 02:44:31,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-28 02:44:31,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-28 02:44:31,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 02:44:31,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 02:44:31,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 02:44:31,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-28 02:44:31,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-28 02:44:31,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-28 02:44:31,542 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_25_to_26_0 [2024-11-28 02:44:31,542 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_25_to_26_0 [2024-11-28 02:44:31,542 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_27_to_28_0 [2024-11-28 02:44:31,542 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_27_to_28_0 [2024-11-28 02:44:31,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 02:44:31,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 02:44:31,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 02:44:31,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 02:44:31,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-28 02:44:31,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-28 02:44:31,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-28 02:44:31,543 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_26_to_27_0 [2024-11-28 02:44:31,543 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_26_to_27_0 [2024-11-28 02:44:31,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 02:44:31,669 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 02:44:31,672 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 02:44:32,018 INFO L? ?]: Removed 15 outVars from TransFormulas that were not future-live. [2024-11-28 02:44:32,018 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 02:44:32,034 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 02:44:32,035 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-28 02:44:32,036 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:44:32 BoogieIcfgContainer [2024-11-28 02:44:32,036 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 02:44:32,041 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 02:44:32,041 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 02:44:32,047 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 02:44:32,047 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:44:31" (1/3) ... [2024-11-28 02:44:32,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26dcd1c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:44:32, skipping insertion in model container [2024-11-28 02:44:32,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:31" (2/3) ... [2024-11-28 02:44:32,050 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26dcd1c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:44:32, skipping insertion in model container [2024-11-28 02:44:32,050 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:44:32" (3/3) ... [2024-11-28 02:44:32,052 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_nested_6.c [2024-11-28 02:44:32,076 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 02:44:32,078 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_nested_6.c that has 5 procedures, 50 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-28 02:44:32,163 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 02:44:32,182 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;@3738a383, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 02:44:32,182 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 02:44:32,189 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 41 states have internal predecessors, (50), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 02:44:32,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-28 02:44:32,199 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:32,199 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:32,200 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:44:32,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:32,209 INFO L85 PathProgramCache]: Analyzing trace with hash -148429229, now seen corresponding path program 1 times [2024-11-28 02:44:32,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:44:32,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331001202] [2024-11-28 02:44:32,221 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:32,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:44:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:32,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:44:32,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:44:32,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331001202] [2024-11-28 02:44:32,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331001202] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:44:32,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:44:32,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:44:32,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407979804] [2024-11-28 02:44:32,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:44:32,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:44:32,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:44:32,698 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:44:32,699 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:44:32,701 INFO L87 Difference]: Start difference. First operand has 50 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 41 states have internal predecessors, (50), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:44:32,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:44:32,761 INFO L93 Difference]: Finished difference Result 105 states and 142 transitions. [2024-11-28 02:44:32,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:44:32,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-28 02:44:32,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:44:32,772 INFO L225 Difference]: With dead ends: 105 [2024-11-28 02:44:32,772 INFO L226 Difference]: Without dead ends: 53 [2024-11-28 02:44:32,776 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:44:32,779 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 6 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:44:32,780 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 118 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:44:32,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-28 02:44:32,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2024-11-28 02:44:32,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 38 states have internal predecessors, (44), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 02:44:32,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2024-11-28 02:44:32,837 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 13 [2024-11-28 02:44:32,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:44:32,837 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2024-11-28 02:44:32,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:44:32,838 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2024-11-28 02:44:32,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-28 02:44:32,841 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:32,842 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:32,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 02:44:32,842 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:44:32,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:32,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1120922105, now seen corresponding path program 1 times [2024-11-28 02:44:32,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:44:32,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872363994] [2024-11-28 02:44:32,844 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:32,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:44:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:33,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:44:33,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:44:33,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872363994] [2024-11-28 02:44:33,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872363994] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:44:33,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:44:33,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:44:33,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369902266] [2024-11-28 02:44:33,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:44:33,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:44:33,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:44:33,035 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:44:33,035 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:44:33,036 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:44:33,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:44:33,065 INFO L93 Difference]: Finished difference Result 95 states and 123 transitions. [2024-11-28 02:44:33,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:44:33,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-28 02:44:33,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:44:33,067 INFO L225 Difference]: With dead ends: 95 [2024-11-28 02:44:33,067 INFO L226 Difference]: Without dead ends: 51 [2024-11-28 02:44:33,067 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:44:33,068 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 2 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:44:33,069 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 110 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:44:33,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-28 02:44:33,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2024-11-28 02:44:33,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 39 states have internal predecessors, (45), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 02:44:33,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2024-11-28 02:44:33,078 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 17 [2024-11-28 02:44:33,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:44:33,078 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2024-11-28 02:44:33,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:44:33,079 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2024-11-28 02:44:33,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-28 02:44:33,080 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:33,080 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:33,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 02:44:33,081 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:44:33,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:33,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1255178618, now seen corresponding path program 1 times [2024-11-28 02:44:33,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:44:33,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858563758] [2024-11-28 02:44:33,082 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:33,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:44:33,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:44:33,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:44:33,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858563758] [2024-11-28 02:44:33,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858563758] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:44:33,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838646674] [2024-11-28 02:44:33,288 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:33,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:33,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:44:33,293 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:44:33,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 02:44:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:33,445 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 02:44:33,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:44:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:44:33,521 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:44:33,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:44:33,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838646674] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:44:33,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:44:33,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-28 02:44:33,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128384461] [2024-11-28 02:44:33,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:44:33,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:44:33,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:44:33,584 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:44:33,584 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:44:33,585 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:44:33,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:44:33,705 INFO L93 Difference]: Finished difference Result 105 states and 137 transitions. [2024-11-28 02:44:33,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:44:33,709 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2024-11-28 02:44:33,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:44:33,710 INFO L225 Difference]: With dead ends: 105 [2024-11-28 02:44:33,711 INFO L226 Difference]: Without dead ends: 60 [2024-11-28 02:44:33,711 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:44:33,714 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 4 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:44:33,715 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 213 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:44:33,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-28 02:44:33,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-11-28 02:44:33,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 48 states have internal predecessors, (54), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-28 02:44:33,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2024-11-28 02:44:33,726 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 25 [2024-11-28 02:44:33,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:44:33,726 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2024-11-28 02:44:33,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:44:33,727 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2024-11-28 02:44:33,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 02:44:33,728 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:33,729 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:33,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 02:44:33,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:33,933 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:44:33,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:33,934 INFO L85 PathProgramCache]: Analyzing trace with hash 919531987, now seen corresponding path program 2 times [2024-11-28 02:44:33,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:44:33,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454042171] [2024-11-28 02:44:33,934 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:44:33,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:44:34,023 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:44:34,023 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:44:34,640 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 02:44:34,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:44:34,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454042171] [2024-11-28 02:44:34,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454042171] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:44:34,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353285999] [2024-11-28 02:44:34,641 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:44:34,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:34,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:44:34,646 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:44:34,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 02:44:34,819 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:44:34,820 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:44:34,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 02:44:34,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:44:34,951 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 02:44:34,954 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:44:35,111 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 02:44:35,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353285999] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:44:35,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:44:35,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2024-11-28 02:44:35,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055636078] [2024-11-28 02:44:35,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:44:35,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 02:44:35,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:44:35,114 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 02:44:35,114 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2024-11-28 02:44:35,114 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 02:44:35,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:44:35,619 INFO L93 Difference]: Finished difference Result 127 states and 169 transitions. [2024-11-28 02:44:35,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 02:44:35,620 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 49 [2024-11-28 02:44:35,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:44:35,622 INFO L225 Difference]: With dead ends: 127 [2024-11-28 02:44:35,622 INFO L226 Difference]: Without dead ends: 70 [2024-11-28 02:44:35,623 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2024-11-28 02:44:35,624 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 23 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:44:35,624 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 179 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:44:35,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-28 02:44:35,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2024-11-28 02:44:35,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.196078431372549) internal successors, (61), 55 states have internal predecessors, (61), 13 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2024-11-28 02:44:35,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2024-11-28 02:44:35,636 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 49 [2024-11-28 02:44:35,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:44:35,636 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2024-11-28 02:44:35,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 02:44:35,637 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2024-11-28 02:44:35,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-28 02:44:35,640 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:35,641 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:35,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 02:44:35,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:35,841 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:44:35,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:35,842 INFO L85 PathProgramCache]: Analyzing trace with hash -948068537, now seen corresponding path program 1 times [2024-11-28 02:44:35,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:44:35,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993357237] [2024-11-28 02:44:35,842 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:35,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:44:35,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 19 proven. 55 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2024-11-28 02:44:36,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:44:36,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993357237] [2024-11-28 02:44:36,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993357237] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:44:36,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68715004] [2024-11-28 02:44:36,625 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:36,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:36,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:44:36,628 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:44:36,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 02:44:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:36,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 02:44:36,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:44:37,089 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-28 02:44:37,091 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:44:37,369 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-28 02:44:37,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68715004] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:44:37,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:44:37,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 10 [2024-11-28 02:44:37,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450475241] [2024-11-28 02:44:37,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:44:37,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 02:44:37,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:44:37,371 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 02:44:37,372 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:44:37,372 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand has 10 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 02:44:37,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:44:37,653 INFO L93 Difference]: Finished difference Result 223 states and 309 transitions. [2024-11-28 02:44:37,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 02:44:37,654 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 131 [2024-11-28 02:44:37,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:44:37,657 INFO L225 Difference]: With dead ends: 223 [2024-11-28 02:44:37,657 INFO L226 Difference]: Without dead ends: 156 [2024-11-28 02:44:37,658 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:44:37,659 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 29 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:44:37,660 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 185 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:44:37,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-11-28 02:44:37,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2024-11-28 02:44:37,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 118 states have (on average 1.1101694915254237) internal successors, (131), 122 states have internal predecessors, (131), 31 states have call successors, (31), 4 states have call predecessors, (31), 6 states have return successors, (33), 31 states have call predecessors, (33), 31 states have call successors, (33) [2024-11-28 02:44:37,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 195 transitions. [2024-11-28 02:44:37,695 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 195 transitions. Word has length 131 [2024-11-28 02:44:37,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:44:37,695 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 195 transitions. [2024-11-28 02:44:37,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 02:44:37,696 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 195 transitions. [2024-11-28 02:44:37,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2024-11-28 02:44:37,736 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:37,736 INFO L218 NwaCegarLoop]: trace histogram [48, 48, 48, 48, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:37,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 02:44:37,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:37,942 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:44:37,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:37,943 INFO L85 PathProgramCache]: Analyzing trace with hash -2120302765, now seen corresponding path program 1 times [2024-11-28 02:44:37,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:44:37,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384386070] [2024-11-28 02:44:37,943 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:37,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:44:38,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 13012 backedges. 84 proven. 391 refuted. 0 times theorem prover too weak. 12537 trivial. 0 not checked. [2024-11-28 02:44:41,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:44:41,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384386070] [2024-11-28 02:44:41,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384386070] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:44:41,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243518491] [2024-11-28 02:44:41,489 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:41,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:41,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:44:41,492 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:44:41,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 02:44:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:42,810 INFO L256 TraceCheckSpWp]: Trace formula consists of 5114 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 02:44:42,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:44:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 13012 backedges. 0 proven. 964 refuted. 0 times theorem prover too weak. 12048 trivial. 0 not checked. [2024-11-28 02:44:43,243 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:44:44,882 INFO L134 CoverageAnalysis]: Checked inductivity of 13012 backedges. 0 proven. 964 refuted. 0 times theorem prover too weak. 12048 trivial. 0 not checked. [2024-11-28 02:44:44,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243518491] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:44:44,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:44:44,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2024-11-28 02:44:44,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974477628] [2024-11-28 02:44:44,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:44:44,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 02:44:44,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:44:44,886 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 02:44:44,887 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2024-11-28 02:44:44,887 INFO L87 Difference]: Start difference. First operand 156 states and 195 transitions. Second operand has 12 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2024-11-28 02:44:45,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:44:45,150 INFO L93 Difference]: Finished difference Result 363 states and 496 transitions. [2024-11-28 02:44:45,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 02:44:45,151 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) Word has length 749 [2024-11-28 02:44:45,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:44:45,156 INFO L225 Difference]: With dead ends: 363 [2024-11-28 02:44:45,156 INFO L226 Difference]: Without dead ends: 214 [2024-11-28 02:44:45,162 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1503 GetRequests, 1488 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-11-28 02:44:45,163 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 20 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:44:45,164 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 275 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:44:45,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-11-28 02:44:45,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2024-11-28 02:44:45,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 163 states have (on average 1.0920245398773005) internal successors, (178), 167 states have internal predecessors, (178), 43 states have call successors, (43), 4 states have call predecessors, (43), 7 states have return successors, (46), 43 states have call predecessors, (46), 43 states have call successors, (46) [2024-11-28 02:44:45,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 267 transitions. [2024-11-28 02:44:45,214 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 267 transitions. Word has length 749 [2024-11-28 02:44:45,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:44:45,214 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 267 transitions. [2024-11-28 02:44:45,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2024-11-28 02:44:45,215 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 267 transitions. [2024-11-28 02:44:45,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1514 [2024-11-28 02:44:45,289 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:45,290 INFO L218 NwaCegarLoop]: trace histogram [72, 72, 72, 72, 72, 72, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:45,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 02:44:45,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-28 02:44:45,490 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:44:45,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:45,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1430285067, now seen corresponding path program 1 times [2024-11-28 02:44:45,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:44:45,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127035942] [2024-11-28 02:44:45,492 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:45,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:44:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:51,837 INFO L134 CoverageAnalysis]: Checked inductivity of 41664 backedges. 128 proven. 805 refuted. 0 times theorem prover too weak. 40731 trivial. 0 not checked. [2024-11-28 02:44:51,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:44:51,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127035942] [2024-11-28 02:44:51,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127035942] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:44:51,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407502242] [2024-11-28 02:44:51,841 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:51,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:51,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:44:51,843 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:44:51,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 02:44:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:54,382 INFO L256 TraceCheckSpWp]: Trace formula consists of 9350 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 02:44:54,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:44:54,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 02:44:54,750 INFO L134 CoverageAnalysis]: Checked inductivity of 41664 backedges. 1769 proven. 3 refuted. 0 times theorem prover too weak. 39892 trivial. 0 not checked. [2024-11-28 02:44:54,750 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:44:57,998 INFO L134 CoverageAnalysis]: Checked inductivity of 41664 backedges. 124 proven. 914 refuted. 0 times theorem prover too weak. 40626 trivial. 0 not checked. [2024-11-28 02:44:57,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407502242] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:44:57,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:44:57,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 10] total 21 [2024-11-28 02:44:58,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511735122] [2024-11-28 02:44:58,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:44:58,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 02:44:58,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:44:58,004 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 02:44:58,004 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2024-11-28 02:44:58,004 INFO L87 Difference]: Start difference. First operand 214 states and 267 transitions. Second operand has 21 states, 16 states have (on average 5.0) internal successors, (80), 17 states have internal predecessors, (80), 9 states have call successors, (25), 6 states have call predecessors, (25), 7 states have return successors, (27), 6 states have call predecessors, (27), 9 states have call successors, (27) [2024-11-28 02:44:58,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:44:58,612 INFO L93 Difference]: Finished difference Result 425 states and 573 transitions. [2024-11-28 02:44:58,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 02:44:58,613 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 5.0) internal successors, (80), 17 states have internal predecessors, (80), 9 states have call successors, (25), 6 states have call predecessors, (25), 7 states have return successors, (27), 6 states have call predecessors, (27), 9 states have call successors, (27) Word has length 1513 [2024-11-28 02:44:58,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:44:58,616 INFO L225 Difference]: With dead ends: 425 [2024-11-28 02:44:58,616 INFO L226 Difference]: Without dead ends: 218 [2024-11-28 02:44:58,619 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3040 GetRequests, 3012 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2024-11-28 02:44:58,622 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 61 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:44:58,623 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 361 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:44:58,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-11-28 02:44:58,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2024-11-28 02:44:58,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 165 states have (on average 1.0909090909090908) internal successors, (180), 169 states have internal predecessors, (180), 43 states have call successors, (43), 4 states have call predecessors, (43), 9 states have return successors, (48), 44 states have call predecessors, (48), 43 states have call successors, (48) [2024-11-28 02:44:58,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 271 transitions. [2024-11-28 02:44:58,653 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 271 transitions. Word has length 1513 [2024-11-28 02:44:58,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:44:58,654 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 271 transitions. [2024-11-28 02:44:58,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 5.0) internal successors, (80), 17 states have internal predecessors, (80), 9 states have call successors, (25), 6 states have call predecessors, (25), 7 states have return successors, (27), 6 states have call predecessors, (27), 9 states have call successors, (27) [2024-11-28 02:44:58,654 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 271 transitions. [2024-11-28 02:44:58,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2666 [2024-11-28 02:44:58,704 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:58,705 INFO L218 NwaCegarLoop]: trace histogram [144, 144, 144, 144, 108, 108, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:58,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 02:44:58,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:58,906 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:44:58,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:58,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1766667275, now seen corresponding path program 1 times [2024-11-28 02:44:58,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:44:58,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444063882] [2024-11-28 02:44:58,907 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:58,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:44:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:17,037 INFO L134 CoverageAnalysis]: Checked inductivity of 138288 backedges. 130 proven. 2269 refuted. 0 times theorem prover too weak. 135889 trivial. 0 not checked. [2024-11-28 02:45:17,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:45:17,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444063882] [2024-11-28 02:45:17,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444063882] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:45:17,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306377904] [2024-11-28 02:45:17,038 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:17,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:17,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:17,041 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:17,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 02:45:20,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:20,611 INFO L256 TraceCheckSpWp]: Trace formula consists of 14894 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-28 02:45:20,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:20,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 02:45:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 138288 backedges. 43688 proven. 8 refuted. 0 times theorem prover too weak. 94592 trivial. 0 not checked. [2024-11-28 02:45:21,178 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:45:28,099 INFO L134 CoverageAnalysis]: Checked inductivity of 138288 backedges. 1213 proven. 1610 refuted. 0 times theorem prover too weak. 135465 trivial. 0 not checked. [2024-11-28 02:45:28,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306377904] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:45:28,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:45:28,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 14] total 29 [2024-11-28 02:45:28,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242219747] [2024-11-28 02:45:28,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:45:28,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 02:45:28,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:45:28,105 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 02:45:28,106 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2024-11-28 02:45:28,106 INFO L87 Difference]: Start difference. First operand 218 states and 271 transitions. Second operand has 29 states, 22 states have (on average 4.2272727272727275) internal successors, (93), 24 states have internal predecessors, (93), 12 states have call successors, (30), 7 states have call predecessors, (30), 10 states have return successors, (34), 10 states have call predecessors, (34), 12 states have call successors, (34) [2024-11-28 02:45:28,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:28,860 INFO L93 Difference]: Finished difference Result 433 states and 582 transitions. [2024-11-28 02:45:28,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 02:45:28,861 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 22 states have (on average 4.2272727272727275) internal successors, (93), 24 states have internal predecessors, (93), 12 states have call successors, (30), 7 states have call predecessors, (30), 10 states have return successors, (34), 10 states have call predecessors, (34), 12 states have call successors, (34) Word has length 2665 [2024-11-28 02:45:28,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:28,866 INFO L225 Difference]: With dead ends: 433 [2024-11-28 02:45:28,869 INFO L226 Difference]: Without dead ends: 222 [2024-11-28 02:45:28,871 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5349 GetRequests, 5311 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 02:45:28,872 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 35 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:28,873 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 550 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:45:28,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-11-28 02:45:28,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2024-11-28 02:45:28,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 167 states have (on average 1.089820359281437) internal successors, (182), 171 states have internal predecessors, (182), 43 states have call successors, (43), 4 states have call predecessors, (43), 11 states have return successors, (50), 46 states have call predecessors, (50), 43 states have call successors, (50) [2024-11-28 02:45:28,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 275 transitions. [2024-11-28 02:45:28,905 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 275 transitions. Word has length 2665 [2024-11-28 02:45:28,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:28,906 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 275 transitions. [2024-11-28 02:45:28,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 22 states have (on average 4.2272727272727275) internal successors, (93), 24 states have internal predecessors, (93), 12 states have call successors, (30), 7 states have call predecessors, (30), 10 states have return successors, (34), 10 states have call predecessors, (34), 12 states have call successors, (34) [2024-11-28 02:45:28,907 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 275 transitions. [2024-11-28 02:45:29,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4178 [2024-11-28 02:45:29,006 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:29,007 INFO L218 NwaCegarLoop]: trace histogram [324, 324, 216, 216, 216, 216, 216, 144, 144, 108, 108, 108, 108, 108, 108, 108, 108, 108, 108, 108, 108, 108, 108, 72, 72, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:29,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 02:45:29,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:29,208 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:45:29,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:29,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1209120651, now seen corresponding path program 2 times [2024-11-28 02:45:29,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:45:29,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141877592] [2024-11-28 02:45:29,210 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:45:29,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:45:29,745 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:45:29,745 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:46:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 416172 backedges. 154 proven. 3105 refuted. 0 times theorem prover too weak. 412913 trivial. 0 not checked. [2024-11-28 02:46:03,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:46:03,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141877592] [2024-11-28 02:46:03,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141877592] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:46:03,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566275633] [2024-11-28 02:46:03,565 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:46:03,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:46:03,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:46:03,566 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:46:03,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 02:46:08,060 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:46:08,060 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:46:08,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 21806 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-28 02:46:08,358 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:46:08,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 02:46:08,867 INFO L134 CoverageAnalysis]: Checked inductivity of 416172 backedges. 168379 proven. 15 refuted. 0 times theorem prover too weak. 247778 trivial. 0 not checked. [2024-11-28 02:46:08,868 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:46:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 416172 backedges. 2011 proven. 2581 refuted. 0 times theorem prover too weak. 411580 trivial. 0 not checked. [2024-11-28 02:46:19,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566275633] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:46:19,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:46:19,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 18] total 34 [2024-11-28 02:46:19,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423697495] [2024-11-28 02:46:19,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:46:19,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 02:46:19,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:46:19,967 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 02:46:19,968 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 02:46:19,969 INFO L87 Difference]: Start difference. First operand 222 states and 275 transitions. Second operand has 34 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 28 states have internal predecessors, (99), 15 states have call successors, (32), 8 states have call predecessors, (32), 12 states have return successors, (37), 14 states have call predecessors, (37), 15 states have call successors, (37) [2024-11-28 02:46:20,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:46:20,624 INFO L93 Difference]: Finished difference Result 441 states and 589 transitions. [2024-11-28 02:46:20,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 02:46:20,625 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 28 states have internal predecessors, (99), 15 states have call successors, (32), 8 states have call predecessors, (32), 12 states have return successors, (37), 14 states have call predecessors, (37), 15 states have call successors, (37) Word has length 4177 [2024-11-28 02:46:20,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:46:20,628 INFO L225 Difference]: With dead ends: 441 [2024-11-28 02:46:20,628 INFO L226 Difference]: Without dead ends: 226 [2024-11-28 02:46:20,630 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8373 GetRequests, 8330 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=338, Invalid=1642, Unknown=0, NotChecked=0, Total=1980 [2024-11-28 02:46:20,631 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 76 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:46:20,632 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 468 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:46:20,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-11-28 02:46:20,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2024-11-28 02:46:20,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 169 states have (on average 1.0887573964497042) internal successors, (184), 173 states have internal predecessors, (184), 43 states have call successors, (43), 4 states have call predecessors, (43), 13 states have return successors, (52), 48 states have call predecessors, (52), 43 states have call successors, (52) [2024-11-28 02:46:20,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 279 transitions. [2024-11-28 02:46:20,653 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 279 transitions. Word has length 4177 [2024-11-28 02:46:20,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:46:20,654 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 279 transitions. [2024-11-28 02:46:20,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 28 states have internal predecessors, (99), 15 states have call successors, (32), 8 states have call predecessors, (32), 12 states have return successors, (37), 14 states have call predecessors, (37), 15 states have call successors, (37) [2024-11-28 02:46:20,654 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 279 transitions. [2024-11-28 02:46:21,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8354 [2024-11-28 02:46:21,061 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:46:21,062 INFO L218 NwaCegarLoop]: trace histogram [864, 864, 576, 576, 576, 432, 432, 288, 288, 288, 288, 288, 288, 288, 180, 180, 144, 144, 144, 144, 144, 144, 144, 72, 72, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:46:21,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 02:46:21,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:46:21,263 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:46:21,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:46:21,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1235433739, now seen corresponding path program 3 times [2024-11-28 02:46:21,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:46:21,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198908506] [2024-11-28 02:46:21,265 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:46:21,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:46:21,920 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 02:46:21,921 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:46:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2263476 backedges. 787 proven. 3 refuted. 0 times theorem prover too weak. 2262686 trivial. 0 not checked. [2024-11-28 02:46:22,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:46:22,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198908506] [2024-11-28 02:46:22,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198908506] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:46:22,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450814572] [2024-11-28 02:46:22,360 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:46:22,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:46:22,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:46:22,361 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:46:22,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 02:46:25,520 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 02:46:25,520 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:46:25,541 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 02:46:25,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:46:25,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 02:46:26,071 INFO L349 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2024-11-28 02:46:26,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 20 [2024-11-28 02:46:26,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2263476 backedges. 787 proven. 3 refuted. 0 times theorem prover too weak. 2262686 trivial. 0 not checked. [2024-11-28 02:46:26,243 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:46:26,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450814572] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:46:26,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:46:26,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2024-11-28 02:46:26,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235457054] [2024-11-28 02:46:26,589 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:46:26,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 02:46:26,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:46:26,596 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 02:46:26,597 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2024-11-28 02:46:26,597 INFO L87 Difference]: Start difference. First operand 226 states and 279 transitions. Second operand has 16 states, 13 states have (on average 4.846153846153846) internal successors, (63), 16 states have internal predecessors, (63), 6 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-28 02:46:30,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 02:46:34,969 WARN L539 Checker$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 02:46:35,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:46:35,434 INFO L93 Difference]: Finished difference Result 559 states and 813 transitions. [2024-11-28 02:46:35,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 02:46:35,435 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.846153846153846) internal successors, (63), 16 states have internal predecessors, (63), 6 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) Word has length 8353 [2024-11-28 02:46:35,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:46:35,461 INFO L225 Difference]: With dead ends: 559 [2024-11-28 02:46:35,462 INFO L226 Difference]: Without dead ends: 552 [2024-11-28 02:46:35,463 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8390 GetRequests, 8363 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2024-11-28 02:46:35,463 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 99 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 21 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:46:35,464 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 260 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 438 Invalid, 3 Unknown, 0 Unchecked, 8.5s Time] [2024-11-28 02:46:35,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2024-11-28 02:46:35,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 238. [2024-11-28 02:46:35,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 179 states have (on average 1.100558659217877) internal successors, (197), 182 states have internal predecessors, (197), 43 states have call successors, (43), 4 states have call predecessors, (43), 15 states have return successors, (126), 51 states have call predecessors, (126), 43 states have call successors, (126) [2024-11-28 02:46:35,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 366 transitions. [2024-11-28 02:46:35,513 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 366 transitions. Word has length 8353 [2024-11-28 02:46:35,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:46:35,525 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 366 transitions. [2024-11-28 02:46:35,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.846153846153846) internal successors, (63), 16 states have internal predecessors, (63), 6 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-28 02:46:35,525 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 366 transitions. [2024-11-28 02:46:35,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8354 [2024-11-28 02:46:35,884 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:46:35,886 INFO L218 NwaCegarLoop]: trace histogram [864, 864, 576, 576, 576, 432, 432, 288, 288, 288, 288, 288, 288, 288, 180, 180, 144, 144, 144, 144, 144, 144, 144, 72, 72, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:46:35,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 02:46:36,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 02:46:36,086 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:46:36,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:46:36,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1284526195, now seen corresponding path program 1 times [2024-11-28 02:46:36,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:46:36,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279831797] [2024-11-28 02:46:36,092 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:46:36,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:46:36,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:48:37,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2263476 backedges. 434 proven. 630 refuted. 0 times theorem prover too weak. 2262412 trivial. 0 not checked. [2024-11-28 02:48:37,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:48:37,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279831797] [2024-11-28 02:48:37,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279831797] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:48:37,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850165083] [2024-11-28 02:48:37,552 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:48:37,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:48:37,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:48:37,554 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:48:37,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 02:48:46,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:48:46,636 INFO L256 TraceCheckSpWp]: Trace formula consists of 39731 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 02:48:46,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:48:47,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2263476 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2263476 trivial. 0 not checked. [2024-11-28 02:48:47,212 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:48:47,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850165083] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:48:47,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:48:47,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2024-11-28 02:48:47,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411257543] [2024-11-28 02:48:47,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:48:47,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:48:47,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:48:47,218 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:48:47,219 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:48:47,219 INFO L87 Difference]: Start difference. First operand 238 states and 366 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-11-28 02:48:47,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:48:47,270 INFO L93 Difference]: Finished difference Result 246 states and 375 transitions. [2024-11-28 02:48:47,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:48:47,271 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 8353 [2024-11-28 02:48:47,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:48:47,290 INFO L225 Difference]: With dead ends: 246 [2024-11-28 02:48:47,292 INFO L226 Difference]: Without dead ends: 241 [2024-11-28 02:48:47,293 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8362 GetRequests, 8353 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:48:47,293 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 0 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:48:47,294 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 165 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:48:47,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2024-11-28 02:48:47,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 240. [2024-11-28 02:48:47,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 181 states have (on average 1.0994475138121547) internal successors, (199), 184 states have internal predecessors, (199), 43 states have call successors, (43), 4 states have call predecessors, (43), 15 states have return successors, (126), 51 states have call predecessors, (126), 43 states have call successors, (126) [2024-11-28 02:48:47,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 368 transitions. [2024-11-28 02:48:47,330 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 368 transitions. Word has length 8353 [2024-11-28 02:48:47,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:48:47,340 INFO L471 AbstractCegarLoop]: Abstraction has 240 states and 368 transitions. [2024-11-28 02:48:47,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-11-28 02:48:47,340 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 368 transitions. [2024-11-28 02:48:48,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16159 [2024-11-28 02:48:48,635 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:48:48,637 INFO L218 NwaCegarLoop]: trace histogram [1704, 1704, 1136, 1136, 1136, 852, 852, 568, 568, 568, 568, 568, 568, 568, 355, 355, 284, 284, 284, 284, 284, 284, 284, 107, 107, 71, 71, 71, 71, 71, 71, 71, 36, 36, 36, 36, 36, 36, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:48:48,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 02:48:48,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2f4e227-cffc-4856-a71f-1586a157ac9d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-28 02:48:48,838 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:48:48,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:48:48,841 INFO L85 PathProgramCache]: Analyzing trace with hash -74308006, now seen corresponding path program 1 times [2024-11-28 02:48:48,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:48:48,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875108768] [2024-11-28 02:48:48,842 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:48:48,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:48:54,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:50:05,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8786531 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8786531 trivial. 0 not checked. [2024-11-28 02:50:05,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:50:05,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875108768] [2024-11-28 02:50:05,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875108768] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:50:05,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:50:05,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:50:05,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72269362] [2024-11-28 02:50:05,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:50:05,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:50:05,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:50:05,201 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:50:05,201 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:50:05,201 INFO L87 Difference]: Start difference. First operand 240 states and 368 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-11-28 02:50:05,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:50:05,242 INFO L93 Difference]: Finished difference Result 246 states and 374 transitions. [2024-11-28 02:50:05,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:50:05,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 16158 [2024-11-28 02:50:05,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:50:05,266 INFO L225 Difference]: With dead ends: 246 [2024-11-28 02:50:05,266 INFO L226 Difference]: Without dead ends: 243 [2024-11-28 02:50:05,267 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:50:05,267 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 1 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:50:05,268 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 162 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:50:05,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-11-28 02:50:05,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 242. [2024-11-28 02:50:05,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 183 states have (on average 1.098360655737705) internal successors, (201), 186 states have internal predecessors, (201), 43 states have call successors, (43), 4 states have call predecessors, (43), 15 states have return successors, (126), 51 states have call predecessors, (126), 43 states have call successors, (126) [2024-11-28 02:50:05,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 370 transitions. [2024-11-28 02:50:05,301 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 370 transitions. Word has length 16158 [2024-11-28 02:50:05,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:50:05,312 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 370 transitions. [2024-11-28 02:50:05,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-11-28 02:50:05,313 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 370 transitions. [2024-11-28 02:50:07,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23964 [2024-11-28 02:50:07,759 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:50:07,762 INFO L218 NwaCegarLoop]: trace histogram [2544, 2544, 1696, 1696, 1696, 1272, 1272, 848, 848, 848, 848, 848, 848, 848, 530, 530, 424, 424, 424, 424, 424, 424, 424, 142, 142, 106, 106, 106, 106, 106, 106, 106, 36, 36, 36, 36, 36, 36, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:50:07,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-28 02:50:07,762 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:50:07,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:50:07,768 INFO L85 PathProgramCache]: Analyzing trace with hash -223925581, now seen corresponding path program 4 times [2024-11-28 02:50:07,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:50:07,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986078368] [2024-11-28 02:50:07,770 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:50:07,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:50:20,772 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:50:20,772 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat