./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_table_swap_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_swap_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 6882eeeeda078376f05bcbd4b1762ced588254a85bc5f57e76099cec8f6bde3a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 13:20:11,105 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 13:20:11,161 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-64bit-Automizer_Default.epf [2024-12-02 13:20:11,166 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 13:20:11,166 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 13:20:11,188 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 13:20:11,188 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 13:20:11,188 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 13:20:11,189 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 13:20:11,189 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 13:20:11,189 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 13:20:11,189 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 13:20:11,189 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 13:20:11,190 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 13:20:11,190 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 13:20:11,190 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 13:20:11,190 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 13:20:11,190 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 13:20:11,190 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 13:20:11,190 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 13:20:11,190 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 13:20:11,190 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 13:20:11,190 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 13:20:11,190 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 13:20:11,191 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 13:20:11,191 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 13:20:11,191 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 13:20:11,191 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 13:20:11,191 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 13:20:11,191 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 13:20:11,191 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 13:20:11,191 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 13:20:11,191 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 13:20:11,191 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 13:20:11,191 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 13:20:11,192 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 13:20:11,192 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 13:20:11,192 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 13:20:11,192 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 13:20:11,192 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 13:20:11,192 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 13:20:11,192 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 13:20:11,192 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 13:20:11,192 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 13:20:11,192 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 13:20:11,192 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_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6882eeeeda078376f05bcbd4b1762ced588254a85bc5f57e76099cec8f6bde3a [2024-12-02 13:20:11,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 13:20:11,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 13:20:11,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 13:20:11,430 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 13:20:11,430 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 13:20:11,431 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/aws-c-common/aws_hash_table_swap_harness.i [2024-12-02 13:20:14,047 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/data/f9dd1c5c8/cb697bcd2ec44459879a3b07c02ab474/FLAG5f78f98a4 [2024-12-02 13:20:14,440 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 13:20:14,441 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/sv-benchmarks/c/aws-c-common/aws_hash_table_swap_harness.i [2024-12-02 13:20:14,466 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/data/f9dd1c5c8/cb697bcd2ec44459879a3b07c02ab474/FLAG5f78f98a4 [2024-12-02 13:20:14,478 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/data/f9dd1c5c8/cb697bcd2ec44459879a3b07c02ab474 [2024-12-02 13:20:14,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 13:20:14,481 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 13:20:14,482 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 13:20:14,482 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 13:20:14,485 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 13:20:14,485 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:20:14" (1/1) ... [2024-12-02 13:20:14,486 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b64ce84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:14, skipping insertion in model container [2024-12-02 13:20:14,486 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:20:14" (1/1) ... [2024-12-02 13:20:14,562 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 13:20:14,785 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_87f96db3-173a-463b-a028-e88ff012b8e5/sv-benchmarks/c/aws-c-common/aws_hash_table_swap_harness.i[4493,4506] [2024-12-02 13:20:14,792 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_87f96db3-173a-463b-a028-e88ff012b8e5/sv-benchmarks/c/aws-c-common/aws_hash_table_swap_harness.i[4553,4566] [2024-12-02 13:20:15,683 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:15,684 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:15,684 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:15,685 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:15,686 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:15,700 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:15,700 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:15,702 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:15,703 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:15,704 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:15,705 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:15,705 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:15,705 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,529 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,530 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,548 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,549 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,554 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,554 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,564 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,565 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,565 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,565 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,566 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,566 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,566 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,591 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_87f96db3-173a-463b-a028-e88ff012b8e5/sv-benchmarks/c/aws-c-common/aws_hash_table_swap_harness.i[228095,228108] [2024-12-02 13:20:16,592 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 13:20:16,615 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 13:20:16,625 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_87f96db3-173a-463b-a028-e88ff012b8e5/sv-benchmarks/c/aws-c-common/aws_hash_table_swap_harness.i[4493,4506] [2024-12-02 13:20:16,626 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_87f96db3-173a-463b-a028-e88ff012b8e5/sv-benchmarks/c/aws-c-common/aws_hash_table_swap_harness.i[4553,4566] [2024-12-02 13:20:16,659 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,659 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,660 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,660 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,660 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,666 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,666 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,667 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,667 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,668 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,669 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,669 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,669 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,727 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7558-7569] [2024-12-02 13:20:16,799 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,799 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,804 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,805 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,806 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,806 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,813 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,814 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,814 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,814 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,814 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,815 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,815 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 13:20:16,829 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_87f96db3-173a-463b-a028-e88ff012b8e5/sv-benchmarks/c/aws-c-common/aws_hash_table_swap_harness.i[228095,228108] [2024-12-02 13:20:16,829 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 13:20:16,973 INFO L204 MainTranslator]: Completed translation [2024-12-02 13:20:16,974 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:16 WrapperNode [2024-12-02 13:20:16,974 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 13:20:16,975 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 13:20:16,975 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 13:20:16,975 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 13:20:16,980 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:16" (1/1) ... [2024-12-02 13:20:17,048 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:16" (1/1) ... [2024-12-02 13:20:17,094 INFO L138 Inliner]: procedures = 763, calls = 2436, calls flagged for inlining = 67, calls inlined = 9, statements flattened = 598 [2024-12-02 13:20:17,094 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 13:20:17,095 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 13:20:17,095 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 13:20:17,095 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 13:20:17,105 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:16" (1/1) ... [2024-12-02 13:20:17,105 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:16" (1/1) ... [2024-12-02 13:20:17,113 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:16" (1/1) ... [2024-12-02 13:20:17,181 INFO L175 MemorySlicer]: Split 284 memory accesses to 9 slices as follows [2, 238, 2, 2, 3, 6, 9, 17, 5]. 84 percent of accesses are in the largest equivalence class. The 14 initializations are split as follows [2, 6, 0, 1, 0, 0, 0, 0, 5]. The 240 writes are split as follows [0, 232, 1, 0, 1, 2, 3, 1, 0]. [2024-12-02 13:20:17,181 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:16" (1/1) ... [2024-12-02 13:20:17,181 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:16" (1/1) ... [2024-12-02 13:20:17,211 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:16" (1/1) ... [2024-12-02 13:20:17,213 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:16" (1/1) ... [2024-12-02 13:20:17,216 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:16" (1/1) ... [2024-12-02 13:20:17,227 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:16" (1/1) ... [2024-12-02 13:20:17,231 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:16" (1/1) ... [2024-12-02 13:20:17,241 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 13:20:17,242 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 13:20:17,242 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 13:20:17,242 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 13:20:17,243 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:16" (1/1) ... [2024-12-02 13:20:17,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 13:20:17,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:20:17,272 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 13:20:17,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 13:20:17,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#0 [2024-12-02 13:20:17,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#1 [2024-12-02 13:20:17,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#2 [2024-12-02 13:20:17,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#3 [2024-12-02 13:20:17,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#4 [2024-12-02 13:20:17,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#5 [2024-12-02 13:20:17,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#6 [2024-12-02 13:20:17,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#7 [2024-12-02 13:20:17,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#8 [2024-12-02 13:20:17,299 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_hash_table [2024-12-02 13:20:17,299 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_hash_table [2024-12-02 13:20:17,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-12-02 13:20:17,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2024-12-02 13:20:17,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2024-12-02 13:20:17,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2024-12-02 13:20:17,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#3 [2024-12-02 13:20:17,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#4 [2024-12-02 13:20:17,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#5 [2024-12-02 13:20:17,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#6 [2024-12-02 13:20:17,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#7 [2024-12-02 13:20:17,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#8 [2024-12-02 13:20:17,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 13:20:17,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 13:20:17,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-12-02 13:20:17,301 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-12-02 13:20:17,301 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-12-02 13:20:17,301 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-12-02 13:20:17,301 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-12-02 13:20:17,301 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-12-02 13:20:17,301 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2024-12-02 13:20:17,301 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2024-12-02 13:20:17,301 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2024-12-02 13:20:17,301 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-12-02 13:20:17,301 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-12-02 13:20:17,301 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2024-12-02 13:20:17,301 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2024-12-02 13:20:17,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 13:20:17,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 13:20:17,301 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2024-12-02 13:20:17,301 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2024-12-02 13:20:17,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-12-02 13:20:17,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-12-02 13:20:17,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-12-02 13:20:17,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-12-02 13:20:17,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2024-12-02 13:20:17,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2024-12-02 13:20:17,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2024-12-02 13:20:17,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#7 [2024-12-02 13:20:17,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#8 [2024-12-02 13:20:17,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 13:20:17,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 13:20:17,303 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2024-12-02 13:20:17,303 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2024-12-02 13:20:17,303 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2024-12-02 13:20:17,303 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2024-12-02 13:20:17,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#0 [2024-12-02 13:20:17,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#1 [2024-12-02 13:20:17,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#2 [2024-12-02 13:20:17,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#3 [2024-12-02 13:20:17,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#4 [2024-12-02 13:20:17,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#5 [2024-12-02 13:20:17,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#6 [2024-12-02 13:20:17,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#7 [2024-12-02 13:20:17,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#8 [2024-12-02 13:20:17,303 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-12-02 13:20:17,303 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-12-02 13:20:17,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-12-02 13:20:17,303 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2024-12-02 13:20:17,303 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2024-12-02 13:20:17,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-12-02 13:20:17,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-12-02 13:20:17,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-12-02 13:20:17,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-12-02 13:20:17,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2024-12-02 13:20:17,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2024-12-02 13:20:17,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2024-12-02 13:20:17,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#7 [2024-12-02 13:20:17,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#8 [2024-12-02 13:20:17,304 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2024-12-02 13:20:17,304 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2024-12-02 13:20:17,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-12-02 13:20:17,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-12-02 13:20:17,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-12-02 13:20:17,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-12-02 13:20:17,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2024-12-02 13:20:17,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2024-12-02 13:20:17,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#6 [2024-12-02 13:20:17,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#7 [2024-12-02 13:20:17,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#8 [2024-12-02 13:20:17,305 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_allocated_hash_table [2024-12-02 13:20:17,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_allocated_hash_table [2024-12-02 13:20:17,305 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2024-12-02 13:20:17,305 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2024-12-02 13:20:17,305 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2024-12-02 13:20:17,305 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2024-12-02 13:20:17,305 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2024-12-02 13:20:17,305 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2024-12-02 13:20:17,305 INFO L130 BoogieDeclarations]: Found specification of procedure check_hash_table_unchanged [2024-12-02 13:20:17,305 INFO L138 BoogieDeclarations]: Found implementation of procedure check_hash_table_unchanged [2024-12-02 13:20:17,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 13:20:17,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 13:20:17,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-12-02 13:20:17,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-12-02 13:20:17,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-12-02 13:20:17,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-12-02 13:20:17,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-12-02 13:20:17,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-12-02 13:20:17,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2024-12-02 13:20:17,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 13:20:17,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 13:20:17,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-12-02 13:20:17,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-12-02 13:20:17,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-12-02 13:20:17,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-12-02 13:20:17,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-12-02 13:20:17,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-12-02 13:20:17,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2024-12-02 13:20:17,306 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2024-12-02 13:20:17,306 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2024-12-02 13:20:17,606 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 13:20:17,608 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 13:20:23,162 INFO L? ?]: Removed 117 outVars from TransFormulas that were not future-live. [2024-12-02 13:20:23,162 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 13:20:23,173 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 13:20:23,173 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2024-12-02 13:20:23,173 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:20:23 BoogieIcfgContainer [2024-12-02 13:20:23,173 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 13:20:23,176 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 13:20:23,176 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 13:20:23,181 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 13:20:23,181 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:20:14" (1/3) ... [2024-12-02 13:20:23,181 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c337dc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:20:23, skipping insertion in model container [2024-12-02 13:20:23,181 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:16" (2/3) ... [2024-12-02 13:20:23,182 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c337dc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:20:23, skipping insertion in model container [2024-12-02 13:20:23,182 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:20:23" (3/3) ... [2024-12-02 13:20:23,183 INFO L128 eAbstractionObserver]: Analyzing ICFG aws_hash_table_swap_harness.i [2024-12-02 13:20:23,197 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 13:20:23,199 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG aws_hash_table_swap_harness.i that has 17 procedures, 142 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-12-02 13:20:23,254 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 13:20:23,265 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;@7efd660c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 13:20:23,265 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-12-02 13:20:23,269 INFO L276 IsEmpty]: Start isEmpty. Operand has 142 states, 89 states have (on average 1.202247191011236) internal successors, (107), 94 states have internal predecessors, (107), 35 states have call successors, (35), 16 states have call predecessors, (35), 16 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2024-12-02 13:20:23,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-12-02 13:20:23,276 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:20:23,277 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] [2024-12-02 13:20:23,277 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:20:23,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:20:23,282 INFO L85 PathProgramCache]: Analyzing trace with hash 35159209, now seen corresponding path program 1 times [2024-12-02 13:20:23,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:20:23,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166674226] [2024-12-02 13:20:23,290 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:20:23,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:20:28,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:20:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:20:29,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:20:29,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166674226] [2024-12-02 13:20:29,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166674226] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:20:29,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:20:29,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 13:20:29,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749639493] [2024-12-02 13:20:29,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:20:29,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-12-02 13:20:29,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:20:29,037 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-12-02 13:20:29,038 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-12-02 13:20:29,040 INFO L87 Difference]: Start difference. First operand has 142 states, 89 states have (on average 1.202247191011236) internal successors, (107), 94 states have internal predecessors, (107), 35 states have call successors, (35), 16 states have call predecessors, (35), 16 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 13:20:29,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:20:29,071 INFO L93 Difference]: Finished difference Result 280 states and 374 transitions. [2024-12-02 13:20:29,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-12-02 13:20:29,072 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2024-12-02 13:20:29,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:20:29,078 INFO L225 Difference]: With dead ends: 280 [2024-12-02 13:20:29,079 INFO L226 Difference]: Without dead ends: 137 [2024-12-02 13:20:29,082 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-12-02 13:20:29,084 INFO L435 NwaCegarLoop]: 174 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 13:20:29,085 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 13:20:29,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-12-02 13:20:29,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2024-12-02 13:20:29,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 85 states have (on average 1.1647058823529413) internal successors, (99), 89 states have internal predecessors, (99), 35 states have call successors, (35), 16 states have call predecessors, (35), 16 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2024-12-02 13:20:29,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 168 transitions. [2024-12-02 13:20:29,120 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 168 transitions. Word has length 25 [2024-12-02 13:20:29,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:20:29,121 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 168 transitions. [2024-12-02 13:20:29,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 13:20:29,121 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 168 transitions. [2024-12-02 13:20:29,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-12-02 13:20:29,122 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:20:29,123 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] [2024-12-02 13:20:29,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 13:20:29,123 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:20:29,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:20:29,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1958985497, now seen corresponding path program 1 times [2024-12-02 13:20:29,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:20:29,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547381499] [2024-12-02 13:20:29,124 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:20:29,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:20:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:20:33,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:20:33,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:20:33,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547381499] [2024-12-02 13:20:33,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547381499] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:20:33,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:20:33,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 13:20:33,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576420648] [2024-12-02 13:20:33,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:20:33,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 13:20:33,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:20:33,935 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 13:20:33,935 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 13:20:33,935 INFO L87 Difference]: Start difference. First operand 137 states and 168 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 13:20:33,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:20:33,996 INFO L93 Difference]: Finished difference Result 192 states and 238 transitions. [2024-12-02 13:20:33,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 13:20:33,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2024-12-02 13:20:33,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:20:33,998 INFO L225 Difference]: With dead ends: 192 [2024-12-02 13:20:33,999 INFO L226 Difference]: Without dead ends: 148 [2024-12-02 13:20:33,999 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 13:20:34,000 INFO L435 NwaCegarLoop]: 167 mSDtfsCounter, 2 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 13:20:34,000 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 330 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 13:20:34,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-12-02 13:20:34,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2024-12-02 13:20:34,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 91 states have (on average 1.164835164835165) internal successors, (106), 95 states have internal predecessors, (106), 40 states have call successors, (40), 16 states have call predecessors, (40), 16 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2024-12-02 13:20:34,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 185 transitions. [2024-12-02 13:20:34,016 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 185 transitions. Word has length 25 [2024-12-02 13:20:34,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:20:34,017 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 185 transitions. [2024-12-02 13:20:34,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 13:20:34,018 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 185 transitions. [2024-12-02 13:20:34,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-12-02 13:20:34,019 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:20:34,019 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:20:34,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 13:20:34,019 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:20:34,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:20:34,020 INFO L85 PathProgramCache]: Analyzing trace with hash -63722128, now seen corresponding path program 1 times [2024-12-02 13:20:34,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:20:34,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635613506] [2024-12-02 13:20:34,020 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:20:34,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:20:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:20:38,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:20:38,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:20:38,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635613506] [2024-12-02 13:20:38,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635613506] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:20:38,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:20:38,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 13:20:38,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147209522] [2024-12-02 13:20:38,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:20:38,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 13:20:38,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:20:38,827 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 13:20:38,828 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 13:20:38,828 INFO L87 Difference]: Start difference. First operand 148 states and 185 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 13:20:38,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:20:38,872 INFO L93 Difference]: Finished difference Result 202 states and 250 transitions. [2024-12-02 13:20:38,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 13:20:38,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2024-12-02 13:20:38,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:20:38,874 INFO L225 Difference]: With dead ends: 202 [2024-12-02 13:20:38,874 INFO L226 Difference]: Without dead ends: 157 [2024-12-02 13:20:38,875 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 13:20:38,876 INFO L435 NwaCegarLoop]: 168 mSDtfsCounter, 2 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 13:20:38,876 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 332 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 13:20:38,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-12-02 13:20:38,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2024-12-02 13:20:38,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 96 states have (on average 1.1458333333333333) internal successors, (110), 99 states have internal predecessors, (110), 44 states have call successors, (44), 16 states have call predecessors, (44), 16 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2024-12-02 13:20:38,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 196 transitions. [2024-12-02 13:20:38,889 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 196 transitions. Word has length 26 [2024-12-02 13:20:38,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:20:38,889 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 196 transitions. [2024-12-02 13:20:38,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 13:20:38,889 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 196 transitions. [2024-12-02 13:20:38,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-12-02 13:20:38,893 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:20:38,893 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:20:38,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-12-02 13:20:38,893 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:20:38,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:20:38,894 INFO L85 PathProgramCache]: Analyzing trace with hash -152541444, now seen corresponding path program 1 times [2024-12-02 13:20:38,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:20:38,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121566164] [2024-12-02 13:20:38,894 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:20:38,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:20:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:20:44,155 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2024-12-02 13:20:44,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:20:44,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121566164] [2024-12-02 13:20:44,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121566164] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:20:44,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768085031] [2024-12-02 13:20:44,155 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:20:44,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:20:44,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:20:44,158 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:20:44,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 13:20:49,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:20:49,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 4485 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 13:20:49,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:20:49,977 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-12-02 13:20:49,977 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:20:49,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768085031] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:20:49,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 13:20:49,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2024-12-02 13:20:49,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418443726] [2024-12-02 13:20:49,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:20:49,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 13:20:49,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:20:49,979 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 13:20:49,979 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 13:20:49,979 INFO L87 Difference]: Start difference. First operand 157 states and 196 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2024-12-02 13:20:50,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:20:50,109 INFO L93 Difference]: Finished difference Result 313 states and 397 transitions. [2024-12-02 13:20:50,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 13:20:50,110 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 129 [2024-12-02 13:20:50,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:20:50,111 INFO L225 Difference]: With dead ends: 313 [2024-12-02 13:20:50,112 INFO L226 Difference]: Without dead ends: 162 [2024-12-02 13:20:50,113 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 13:20:50,113 INFO L435 NwaCegarLoop]: 165 mSDtfsCounter, 0 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 13:20:50,114 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 656 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 13:20:50,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-12-02 13:20:50,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2024-12-02 13:20:50,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 100 states have (on average 1.14) internal successors, (114), 103 states have internal predecessors, (114), 44 states have call successors, (44), 16 states have call predecessors, (44), 17 states have return successors, (43), 43 states have call predecessors, (43), 42 states have call successors, (43) [2024-12-02 13:20:50,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 201 transitions. [2024-12-02 13:20:50,130 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 201 transitions. Word has length 129 [2024-12-02 13:20:50,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:20:50,131 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 201 transitions. [2024-12-02 13:20:50,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2024-12-02 13:20:50,131 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 201 transitions. [2024-12-02 13:20:50,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2024-12-02 13:20:50,134 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:20:50,134 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:20:50,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 13:20:50,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:20:50,335 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:20:50,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:20:50,336 INFO L85 PathProgramCache]: Analyzing trace with hash 209357336, now seen corresponding path program 1 times [2024-12-02 13:20:50,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:20:50,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056416454] [2024-12-02 13:20:50,336 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:20:50,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:20:54,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:20:58,009 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-12-02 13:20:58,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:20:58,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056416454] [2024-12-02 13:20:58,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056416454] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:20:58,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540658830] [2024-12-02 13:20:58,009 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:20:58,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:20:58,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:20:58,011 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:20:58,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 13:21:03,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:21:03,583 INFO L256 TraceCheckSpWp]: Trace formula consists of 4493 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-12-02 13:21:03,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:21:04,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 13:21:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-12-02 13:21:05,603 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:21:05,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540658830] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:21:05,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 13:21:05,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [11] total 18 [2024-12-02 13:21:05,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085991208] [2024-12-02 13:21:05,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:21:05,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-12-02 13:21:05,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:21:05,604 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-12-02 13:21:05,604 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-12-02 13:21:05,605 INFO L87 Difference]: Start difference. First operand 162 states and 201 transitions. Second operand has 13 states, 12 states have (on average 6.75) internal successors, (81), 10 states have internal predecessors, (81), 5 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2024-12-02 13:21:09,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-12-02 13:21:16,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-12-02 13:21:20,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-12-02 13:21:22,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:21:22,036 INFO L93 Difference]: Finished difference Result 377 states and 454 transitions. [2024-12-02 13:21:22,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-12-02 13:21:22,037 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 6.75) internal successors, (81), 10 states have internal predecessors, (81), 5 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 141 [2024-12-02 13:21:22,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:21:22,040 INFO L225 Difference]: With dead ends: 377 [2024-12-02 13:21:22,040 INFO L226 Difference]: Without dead ends: 261 [2024-12-02 13:21:22,041 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2024-12-02 13:21:22,041 INFO L435 NwaCegarLoop]: 225 mSDtfsCounter, 131 mSDsluCounter, 1663 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 26 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1888 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2024-12-02 13:21:22,042 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 1888 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 470 Invalid, 3 Unknown, 0 Unchecked, 15.5s Time] [2024-12-02 13:21:22,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2024-12-02 13:21:22,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 258. [2024-12-02 13:21:22,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 165 states have (on average 1.1454545454545455) internal successors, (189), 169 states have internal predecessors, (189), 60 states have call successors, (60), 29 states have call predecessors, (60), 32 states have return successors, (61), 60 states have call predecessors, (61), 58 states have call successors, (61) [2024-12-02 13:21:22,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 310 transitions. [2024-12-02 13:21:22,066 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 310 transitions. Word has length 141 [2024-12-02 13:21:22,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:21:22,067 INFO L471 AbstractCegarLoop]: Abstraction has 258 states and 310 transitions. [2024-12-02 13:21:22,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 6.75) internal successors, (81), 10 states have internal predecessors, (81), 5 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2024-12-02 13:21:22,067 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 310 transitions. [2024-12-02 13:21:22,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2024-12-02 13:21:22,069 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:21:22,070 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:21:22,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 13:21:22,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:21:22,270 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:21:22,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:21:22,271 INFO L85 PathProgramCache]: Analyzing trace with hash -283268838, now seen corresponding path program 1 times [2024-12-02 13:21:22,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:21:22,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830487511] [2024-12-02 13:21:22,271 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:21:22,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:21:26,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:21:27,324 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-12-02 13:21:27,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:21:27,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830487511] [2024-12-02 13:21:27,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830487511] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:21:27,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796937411] [2024-12-02 13:21:27,324 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:21:27,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:21:27,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:21:27,328 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:21:27,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 13:21:33,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:21:33,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 4488 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 13:21:33,488 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:21:33,963 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-12-02 13:21:33,963 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:21:33,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796937411] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:21:33,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 13:21:33,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2024-12-02 13:21:33,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922096016] [2024-12-02 13:21:33,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:21:33,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 13:21:33,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:21:33,965 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 13:21:33,965 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-12-02 13:21:33,965 INFO L87 Difference]: Start difference. First operand 258 states and 310 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 3 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2024-12-02 13:21:34,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:21:34,842 INFO L93 Difference]: Finished difference Result 389 states and 470 transitions. [2024-12-02 13:21:34,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 13:21:34,843 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 3 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 141 [2024-12-02 13:21:34,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:21:34,846 INFO L225 Difference]: With dead ends: 389 [2024-12-02 13:21:34,846 INFO L226 Difference]: Without dead ends: 270 [2024-12-02 13:21:34,847 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-12-02 13:21:34,848 INFO L435 NwaCegarLoop]: 152 mSDtfsCounter, 166 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-12-02 13:21:34,848 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 572 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-12-02 13:21:34,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2024-12-02 13:21:34,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 267. [2024-12-02 13:21:34,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 171 states have (on average 1.1461988304093567) internal successors, (196), 176 states have internal predecessors, (196), 62 states have call successors, (62), 29 states have call predecessors, (62), 33 states have return successors, (64), 62 states have call predecessors, (64), 60 states have call successors, (64) [2024-12-02 13:21:34,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 322 transitions. [2024-12-02 13:21:34,874 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 322 transitions. Word has length 141 [2024-12-02 13:21:34,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:21:34,875 INFO L471 AbstractCegarLoop]: Abstraction has 267 states and 322 transitions. [2024-12-02 13:21:34,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 3 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2024-12-02 13:21:34,875 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 322 transitions. [2024-12-02 13:21:34,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-12-02 13:21:34,877 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:21:34,877 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:21:34,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 13:21:35,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-12-02 13:21:35,078 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:21:35,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:21:35,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1412508686, now seen corresponding path program 1 times [2024-12-02 13:21:35,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:21:35,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045243956] [2024-12-02 13:21:35,078 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:21:35,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:21:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:21:42,239 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-12-02 13:21:42,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:21:42,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045243956] [2024-12-02 13:21:42,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045243956] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:21:42,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758535490] [2024-12-02 13:21:42,240 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:21:42,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:21:42,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:21:42,242 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:21:42,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 13:21:48,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:21:48,059 INFO L256 TraceCheckSpWp]: Trace formula consists of 4491 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-12-02 13:21:48,066 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:21:48,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 13:21:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-12-02 13:21:49,570 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:21:49,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758535490] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:21:49,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 13:21:49,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11] total 16 [2024-12-02 13:21:49,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298807928] [2024-12-02 13:21:49,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:21:49,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 13:21:49,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:21:49,571 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 13:21:49,572 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2024-12-02 13:21:49,572 INFO L87 Difference]: Start difference. First operand 267 states and 322 transitions. Second operand has 12 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) [2024-12-02 13:21:54,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:21:54,142 INFO L93 Difference]: Finished difference Result 472 states and 568 transitions. [2024-12-02 13:21:54,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-12-02 13:21:54,143 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) Word has length 140 [2024-12-02 13:21:54,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:21:54,145 INFO L225 Difference]: With dead ends: 472 [2024-12-02 13:21:54,146 INFO L226 Difference]: Without dead ends: 285 [2024-12-02 13:21:54,147 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2024-12-02 13:21:54,148 INFO L435 NwaCegarLoop]: 224 mSDtfsCounter, 163 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-12-02 13:21:54,148 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 1234 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-12-02 13:21:54,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2024-12-02 13:21:54,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 276. [2024-12-02 13:21:54,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 179 states have (on average 1.1452513966480447) internal successors, (205), 184 states have internal predecessors, (205), 62 states have call successors, (62), 30 states have call predecessors, (62), 34 states have return successors, (64), 62 states have call predecessors, (64), 60 states have call successors, (64) [2024-12-02 13:21:54,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 331 transitions. [2024-12-02 13:21:54,172 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 331 transitions. Word has length 140 [2024-12-02 13:21:54,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:21:54,172 INFO L471 AbstractCegarLoop]: Abstraction has 276 states and 331 transitions. [2024-12-02 13:21:54,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) [2024-12-02 13:21:54,172 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 331 transitions. [2024-12-02 13:21:54,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2024-12-02 13:21:54,174 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:21:54,174 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:21:54,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 13:21:54,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-12-02 13:21:54,375 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:21:54,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:21:54,375 INFO L85 PathProgramCache]: Analyzing trace with hash -2010713213, now seen corresponding path program 1 times [2024-12-02 13:21:54,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:21:54,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105999966] [2024-12-02 13:21:54,375 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:21:54,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:21:59,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:22:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2024-12-02 13:22:00,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:22:00,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105999966] [2024-12-02 13:22:00,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105999966] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:22:00,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723022764] [2024-12-02 13:22:00,678 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:22:00,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:22:00,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:22:00,680 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:22:00,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 13:22:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:22:06,583 INFO L256 TraceCheckSpWp]: Trace formula consists of 4517 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-12-02 13:22:06,588 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:22:06,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-12-02 13:22:08,098 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-12-02 13:22:08,098 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:22:08,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723022764] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:22:08,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 13:22:08,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2024-12-02 13:22:08,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968935827] [2024-12-02 13:22:08,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:22:08,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 13:22:08,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:22:08,100 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 13:22:08,100 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2024-12-02 13:22:08,100 INFO L87 Difference]: Start difference. First operand 276 states and 331 transitions. Second operand has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 8 states have internal predecessors, (88), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2024-12-02 13:22:09,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:22:09,348 INFO L93 Difference]: Finished difference Result 419 states and 503 transitions. [2024-12-02 13:22:09,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 13:22:09,349 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 8 states have internal predecessors, (88), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) Word has length 147 [2024-12-02 13:22:09,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:22:09,352 INFO L225 Difference]: With dead ends: 419 [2024-12-02 13:22:09,352 INFO L226 Difference]: Without dead ends: 296 [2024-12-02 13:22:09,353 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2024-12-02 13:22:09,353 INFO L435 NwaCegarLoop]: 155 mSDtfsCounter, 12 mSDsluCounter, 1176 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1331 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-12-02 13:22:09,353 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1331 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-12-02 13:22:09,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2024-12-02 13:22:09,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 278. [2024-12-02 13:22:09,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 180 states have (on average 1.1444444444444444) internal successors, (206), 186 states have internal predecessors, (206), 62 states have call successors, (62), 30 states have call predecessors, (62), 35 states have return successors, (66), 62 states have call predecessors, (66), 60 states have call successors, (66) [2024-12-02 13:22:09,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 334 transitions. [2024-12-02 13:22:09,388 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 334 transitions. Word has length 147 [2024-12-02 13:22:09,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:22:09,388 INFO L471 AbstractCegarLoop]: Abstraction has 278 states and 334 transitions. [2024-12-02 13:22:09,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 8 states have internal predecessors, (88), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2024-12-02 13:22:09,389 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 334 transitions. [2024-12-02 13:22:09,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-12-02 13:22:09,391 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:22:09,392 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:22:09,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 13:22:09,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-12-02 13:22:09,592 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:22:09,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:22:09,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1905134860, now seen corresponding path program 1 times [2024-12-02 13:22:09,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:22:09,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181030844] [2024-12-02 13:22:09,593 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:22:09,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:22:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:22:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-12-02 13:22:15,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:22:15,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181030844] [2024-12-02 13:22:15,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181030844] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:22:15,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49479427] [2024-12-02 13:22:15,231 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:22:15,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:22:15,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:22:15,233 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:22:15,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 13:22:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:22:21,387 INFO L256 TraceCheckSpWp]: Trace formula consists of 4486 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 13:22:21,390 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:22:21,857 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-12-02 13:22:21,858 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:22:21,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49479427] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:22:21,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 13:22:21,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2024-12-02 13:22:21,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140941926] [2024-12-02 13:22:21,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:22:21,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 13:22:21,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:22:21,859 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 13:22:21,859 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-12-02 13:22:21,859 INFO L87 Difference]: Start difference. First operand 278 states and 334 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2024-12-02 13:22:22,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:22:22,569 INFO L93 Difference]: Finished difference Result 468 states and 562 transitions. [2024-12-02 13:22:22,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 13:22:22,569 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 140 [2024-12-02 13:22:22,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:22:22,572 INFO L225 Difference]: With dead ends: 468 [2024-12-02 13:22:22,572 INFO L226 Difference]: Without dead ends: 268 [2024-12-02 13:22:22,573 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-12-02 13:22:22,573 INFO L435 NwaCegarLoop]: 147 mSDtfsCounter, 174 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 13:22:22,573 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 421 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 13:22:22,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2024-12-02 13:22:22,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2024-12-02 13:22:22,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 173 states have (on average 1.1271676300578035) internal successors, (195), 177 states have internal predecessors, (195), 60 states have call successors, (60), 30 states have call predecessors, (60), 34 states have return successors, (62), 61 states have call predecessors, (62), 58 states have call successors, (62) [2024-12-02 13:22:22,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 317 transitions. [2024-12-02 13:22:22,597 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 317 transitions. Word has length 140 [2024-12-02 13:22:22,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:22:22,597 INFO L471 AbstractCegarLoop]: Abstraction has 268 states and 317 transitions. [2024-12-02 13:22:22,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2024-12-02 13:22:22,598 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 317 transitions. [2024-12-02 13:22:22,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2024-12-02 13:22:22,600 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:22:22,600 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:22:22,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 13:22:22,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:22:22,801 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:22:22,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:22:22,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1177093399, now seen corresponding path program 1 times [2024-12-02 13:22:22,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:22:22,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889916216] [2024-12-02 13:22:22,801 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:22:22,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:22:27,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:22:32,217 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2024-12-02 13:22:32,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:22:32,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889916216] [2024-12-02 13:22:32,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889916216] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:22:32,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:22:32,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-12-02 13:22:32,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886983513] [2024-12-02 13:22:32,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:22:32,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 13:22:32,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:22:32,219 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 13:22:32,219 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2024-12-02 13:22:32,219 INFO L87 Difference]: Start difference. First operand 268 states and 317 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 7 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2024-12-02 13:22:35,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:22:35,433 INFO L93 Difference]: Finished difference Result 285 states and 336 transitions. [2024-12-02 13:22:35,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 13:22:35,434 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 7 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 154 [2024-12-02 13:22:35,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:22:35,436 INFO L225 Difference]: With dead ends: 285 [2024-12-02 13:22:35,436 INFO L226 Difference]: Without dead ends: 271 [2024-12-02 13:22:35,437 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2024-12-02 13:22:35,437 INFO L435 NwaCegarLoop]: 170 mSDtfsCounter, 26 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1637 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-12-02 13:22:35,438 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 1637 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-12-02 13:22:35,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2024-12-02 13:22:35,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2024-12-02 13:22:35,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 175 states have (on average 1.1257142857142857) internal successors, (197), 180 states have internal predecessors, (197), 60 states have call successors, (60), 30 states have call predecessors, (60), 35 states have return successors, (64), 61 states have call predecessors, (64), 58 states have call successors, (64) [2024-12-02 13:22:35,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 321 transitions. [2024-12-02 13:22:35,456 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 321 transitions. Word has length 154 [2024-12-02 13:22:35,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:22:35,456 INFO L471 AbstractCegarLoop]: Abstraction has 271 states and 321 transitions. [2024-12-02 13:22:35,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 7 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2024-12-02 13:22:35,457 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 321 transitions. [2024-12-02 13:22:35,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2024-12-02 13:22:35,458 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:22:35,458 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:22:35,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-12-02 13:22:35,459 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:22:35,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:22:35,459 INFO L85 PathProgramCache]: Analyzing trace with hash 720704093, now seen corresponding path program 1 times [2024-12-02 13:22:35,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:22:35,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22922016] [2024-12-02 13:22:35,459 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:22:35,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:22:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:22:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2024-12-02 13:22:41,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:22:41,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22922016] [2024-12-02 13:22:41,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22922016] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:22:41,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66065629] [2024-12-02 13:22:41,389 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:22:41,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:22:41,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:22:41,391 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:22:41,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 13:22:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:22:47,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 4515 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-12-02 13:22:47,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:22:52,440 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((v_aws_hash_table_is_valid_~map.base_4 Int) (v_aws_hash_table_is_valid_~map.offset_4 Int)) (not (= (select (select |c_#memory_$Pointer$#6.offset| v_aws_hash_table_is_valid_~map.base_4) v_aws_hash_table_is_valid_~map.offset_4) 0))) (exists ((v_aws_hash_table_is_valid_~map.base_4 Int) (v_aws_hash_table_is_valid_~map.offset_4 Int)) (not (= (select (select |c_#memory_$Pointer$#6.base| v_aws_hash_table_is_valid_~map.base_4) v_aws_hash_table_is_valid_~map.offset_4) 0)))) is different from true [2024-12-02 13:23:00,963 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-12-02 13:23:00,963 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:23:00,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66065629] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:23:00,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 13:23:00,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2024-12-02 13:23:00,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780761681] [2024-12-02 13:23:00,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:23:00,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 13:23:00,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:23:00,965 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 13:23:00,965 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=105, Unknown=3, NotChecked=20, Total=156 [2024-12-02 13:23:00,965 INFO L87 Difference]: Start difference. First operand 271 states and 321 transitions. Second operand has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 3 states have call successors, (23) [2024-12-02 13:23:01,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:23:01,695 INFO L93 Difference]: Finished difference Result 448 states and 534 transitions. [2024-12-02 13:23:01,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 13:23:01,695 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 3 states have call successors, (23) Word has length 146 [2024-12-02 13:23:01,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:23:01,697 INFO L225 Difference]: With dead ends: 448 [2024-12-02 13:23:01,697 INFO L226 Difference]: Without dead ends: 265 [2024-12-02 13:23:01,698 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=28, Invalid=105, Unknown=3, NotChecked=20, Total=156 [2024-12-02 13:23:01,698 INFO L435 NwaCegarLoop]: 161 mSDtfsCounter, 3 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-12-02 13:23:01,698 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 909 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 172 Unchecked, 0.7s Time] [2024-12-02 13:23:01,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-12-02 13:23:01,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2024-12-02 13:23:01,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 171 states have (on average 1.1169590643274854) internal successors, (191), 175 states have internal predecessors, (191), 60 states have call successors, (60), 30 states have call predecessors, (60), 33 states have return successors, (62), 60 states have call predecessors, (62), 58 states have call successors, (62) [2024-12-02 13:23:01,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 313 transitions. [2024-12-02 13:23:01,714 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 313 transitions. Word has length 146 [2024-12-02 13:23:01,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:23:01,714 INFO L471 AbstractCegarLoop]: Abstraction has 265 states and 313 transitions. [2024-12-02 13:23:01,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 3 states have call successors, (23) [2024-12-02 13:23:01,715 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 313 transitions. [2024-12-02 13:23:01,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-12-02 13:23:01,716 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:23:01,716 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:23:01,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 13:23:01,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:23:01,917 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:23:01,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:23:01,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1107038935, now seen corresponding path program 1 times [2024-12-02 13:23:01,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:23:01,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553707904] [2024-12-02 13:23:01,917 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:23:01,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:23:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:23:10,106 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2024-12-02 13:23:10,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:23:10,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553707904] [2024-12-02 13:23:10,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553707904] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:23:10,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:23:10,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-12-02 13:23:10,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379833730] [2024-12-02 13:23:10,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:23:10,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-12-02 13:23:10,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:23:10,108 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-12-02 13:23:10,108 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2024-12-02 13:23:10,108 INFO L87 Difference]: Start difference. First operand 265 states and 313 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 6 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 6 states have call predecessors, (21), 5 states have call successors, (21) [2024-12-02 13:23:12,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:23:12,525 INFO L93 Difference]: Finished difference Result 279 states and 327 transitions. [2024-12-02 13:23:12,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 13:23:12,525 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 6 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 6 states have call predecessors, (21), 5 states have call successors, (21) Word has length 153 [2024-12-02 13:23:12,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:23:12,528 INFO L225 Difference]: With dead ends: 279 [2024-12-02 13:23:12,528 INFO L226 Difference]: Without dead ends: 265 [2024-12-02 13:23:12,528 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2024-12-02 13:23:12,529 INFO L435 NwaCegarLoop]: 164 mSDtfsCounter, 10 mSDsluCounter, 1281 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-12-02 13:23:12,529 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1445 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-12-02 13:23:12,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-12-02 13:23:12,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2024-12-02 13:23:12,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 171 states have (on average 1.1169590643274854) internal successors, (191), 175 states have internal predecessors, (191), 60 states have call successors, (60), 30 states have call predecessors, (60), 33 states have return successors, (61), 60 states have call predecessors, (61), 58 states have call successors, (61) [2024-12-02 13:23:12,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 312 transitions. [2024-12-02 13:23:12,551 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 312 transitions. Word has length 153 [2024-12-02 13:23:12,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:23:12,551 INFO L471 AbstractCegarLoop]: Abstraction has 265 states and 312 transitions. [2024-12-02 13:23:12,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 6 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 6 states have call predecessors, (21), 5 states have call successors, (21) [2024-12-02 13:23:12,552 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 312 transitions. [2024-12-02 13:23:12,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-12-02 13:23:12,554 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:23:12,554 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:23:12,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-12-02 13:23:12,555 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:23:12,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:23:12,555 INFO L85 PathProgramCache]: Analyzing trace with hash 159811356, now seen corresponding path program 1 times [2024-12-02 13:23:12,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:23:12,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046090377] [2024-12-02 13:23:12,555 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:23:12,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:23:17,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:23:19,914 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2024-12-02 13:23:19,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:23:19,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046090377] [2024-12-02 13:23:19,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046090377] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:23:19,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016661998] [2024-12-02 13:23:19,914 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:23:19,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:23:19,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:23:19,916 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:23:19,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 13:23:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:23:26,223 INFO L256 TraceCheckSpWp]: Trace formula consists of 4605 conjuncts, 140 conjuncts are in the unsatisfiable core [2024-12-02 13:23:26,230 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:23:26,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-12-02 13:23:28,147 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 15 treesize of output 1 [2024-12-02 13:23:28,162 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 27 treesize of output 1 [2024-12-02 13:23:28,198 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 [2024-12-02 13:23:34,478 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 103 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-12-02 13:23:34,478 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:23:44,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016661998] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:23:44,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:23:44,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 22] total 27 [2024-12-02 13:23:44,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641245937] [2024-12-02 13:23:44,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 13:23:44,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-12-02 13:23:44,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:23:44,611 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-12-02 13:23:44,612 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1449, Unknown=0, NotChecked=0, Total=1560 [2024-12-02 13:23:44,612 INFO L87 Difference]: Start difference. First operand 265 states and 312 transitions. Second operand has 27 states, 23 states have (on average 6.130434782608695) internal successors, (141), 22 states have internal predecessors, (141), 10 states have call successors, (44), 3 states have call predecessors, (44), 11 states have return successors, (43), 10 states have call predecessors, (43), 10 states have call successors, (43) [2024-12-02 13:23:49,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:23:49,142 INFO L93 Difference]: Finished difference Result 517 states and 610 transitions. [2024-12-02 13:23:49,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 13:23:49,143 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 6.130434782608695) internal successors, (141), 22 states have internal predecessors, (141), 10 states have call successors, (44), 3 states have call predecessors, (44), 11 states have return successors, (43), 10 states have call predecessors, (43), 10 states have call successors, (43) Word has length 167 [2024-12-02 13:23:49,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:23:49,145 INFO L225 Difference]: With dead ends: 517 [2024-12-02 13:23:49,145 INFO L226 Difference]: Without dead ends: 271 [2024-12-02 13:23:49,147 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=125, Invalid=1681, Unknown=0, NotChecked=0, Total=1806 [2024-12-02 13:23:49,147 INFO L435 NwaCegarLoop]: 149 mSDtfsCounter, 16 mSDsluCounter, 2785 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 2934 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-12-02 13:23:49,147 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 2934 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-12-02 13:23:49,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2024-12-02 13:23:49,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 268. [2024-12-02 13:23:49,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 173 states have (on average 1.1098265895953756) internal successors, (192), 178 states have internal predecessors, (192), 60 states have call successors, (60), 30 states have call predecessors, (60), 34 states have return successors, (62), 60 states have call predecessors, (62), 58 states have call successors, (62) [2024-12-02 13:23:49,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 314 transitions. [2024-12-02 13:23:49,170 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 314 transitions. Word has length 167 [2024-12-02 13:23:49,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:23:49,170 INFO L471 AbstractCegarLoop]: Abstraction has 268 states and 314 transitions. [2024-12-02 13:23:49,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 6.130434782608695) internal successors, (141), 22 states have internal predecessors, (141), 10 states have call successors, (44), 3 states have call predecessors, (44), 11 states have return successors, (43), 10 states have call predecessors, (43), 10 states have call successors, (43) [2024-12-02 13:23:49,171 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 314 transitions. [2024-12-02 13:23:49,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2024-12-02 13:23:49,173 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:23:49,173 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:23:49,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 13:23:49,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:23:49,373 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:23:49,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:23:49,374 INFO L85 PathProgramCache]: Analyzing trace with hash -28168777, now seen corresponding path program 1 times [2024-12-02 13:23:49,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:23:49,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376426524] [2024-12-02 13:23:49,374 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:23:49,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:23:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:23:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2024-12-02 13:23:55,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:23:55,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376426524] [2024-12-02 13:23:55,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376426524] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:23:55,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051169421] [2024-12-02 13:23:55,237 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:23:55,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:23:55,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:23:55,239 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:23:55,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 13:24:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:24:02,191 INFO L256 TraceCheckSpWp]: Trace formula consists of 4609 conjuncts, 118 conjuncts are in the unsatisfiable core [2024-12-02 13:24:02,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:24:02,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-12-02 13:24:03,921 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 27 treesize of output 1 [2024-12-02 13:24:03,937 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 [2024-12-02 13:24:03,985 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 15 treesize of output 1 [2024-12-02 13:24:09,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2024-12-02 13:24:09,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2024-12-02 13:24:09,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2024-12-02 13:24:09,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-12-02 13:24:09,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2024-12-02 13:24:14,519 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 89 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-12-02 13:24:14,519 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:24:18,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051169421] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:24:18,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:24:18,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 25] total 29 [2024-12-02 13:24:18,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023658471] [2024-12-02 13:24:18,062 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 13:24:18,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-12-02 13:24:18,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:24:18,063 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-12-02 13:24:18,063 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2024-12-02 13:24:18,063 INFO L87 Difference]: Start difference. First operand 268 states and 314 transitions. Second operand has 29 states, 25 states have (on average 5.92) internal successors, (148), 28 states have internal predecessors, (148), 15 states have call successors, (44), 3 states have call predecessors, (44), 11 states have return successors, (43), 12 states have call predecessors, (43), 15 states have call successors, (43) [2024-12-02 13:24:38,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:24:38,574 INFO L93 Difference]: Finished difference Result 495 states and 585 transitions. [2024-12-02 13:24:38,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-12-02 13:24:38,576 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 5.92) internal successors, (148), 28 states have internal predecessors, (148), 15 states have call successors, (44), 3 states have call predecessors, (44), 11 states have return successors, (43), 12 states have call predecessors, (43), 15 states have call successors, (43) Word has length 169 [2024-12-02 13:24:38,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:24:38,578 INFO L225 Difference]: With dead ends: 495 [2024-12-02 13:24:38,578 INFO L226 Difference]: Without dead ends: 279 [2024-12-02 13:24:38,579 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 153 SyntacticMatches, 8 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=202, Invalid=2450, Unknown=0, NotChecked=0, Total=2652 [2024-12-02 13:24:38,580 INFO L435 NwaCegarLoop]: 202 mSDtfsCounter, 108 mSDsluCounter, 3329 mSDsCounter, 0 mSdLazyCounter, 2113 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 3531 SdHoareTripleChecker+Invalid, 2174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2024-12-02 13:24:38,580 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 3531 Invalid, 2174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2113 Invalid, 0 Unknown, 0 Unchecked, 15.7s Time] [2024-12-02 13:24:38,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2024-12-02 13:24:38,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 272. [2024-12-02 13:24:38,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 175 states have (on average 1.0914285714285714) internal successors, (191), 181 states have internal predecessors, (191), 60 states have call successors, (60), 30 states have call predecessors, (60), 36 states have return successors, (65), 61 states have call predecessors, (65), 58 states have call successors, (65) [2024-12-02 13:24:38,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 316 transitions. [2024-12-02 13:24:38,614 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 316 transitions. Word has length 169 [2024-12-02 13:24:38,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:24:38,615 INFO L471 AbstractCegarLoop]: Abstraction has 272 states and 316 transitions. [2024-12-02 13:24:38,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 5.92) internal successors, (148), 28 states have internal predecessors, (148), 15 states have call successors, (44), 3 states have call predecessors, (44), 11 states have return successors, (43), 12 states have call predecessors, (43), 15 states have call successors, (43) [2024-12-02 13:24:38,615 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 316 transitions. [2024-12-02 13:24:38,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2024-12-02 13:24:38,616 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:24:38,616 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:24:38,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 13:24:38,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:24:38,817 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:24:38,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:24:38,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1013307349, now seen corresponding path program 1 times [2024-12-02 13:24:38,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:24:38,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190911388] [2024-12-02 13:24:38,818 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:24:38,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:24:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:24:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-12-02 13:24:49,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:24:49,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190911388] [2024-12-02 13:24:49,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190911388] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:24:49,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114784605] [2024-12-02 13:24:49,627 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:24:49,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:24:49,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:24:49,629 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:24:49,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 13:24:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:24:56,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 4702 conjuncts, 136 conjuncts are in the unsatisfiable core [2024-12-02 13:24:56,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:24:58,061 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 [2024-12-02 13:24:58,090 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 15 treesize of output 1 [2024-12-02 13:25:09,385 INFO L349 Elim1Store]: treesize reduction 34, result has 44.3 percent of original size [2024-12-02 13:25:09,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 70 treesize of output 101 [2024-12-02 13:25:09,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2024-12-02 13:25:10,078 INFO L349 Elim1Store]: treesize reduction 93, result has 35.9 percent of original size [2024-12-02 13:25:10,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 51 treesize of output 107 [2024-12-02 13:25:10,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-12-02 13:25:10,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-12-02 13:25:10,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-12-02 13:25:10,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-12-02 13:25:10,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 16 [2024-12-02 13:25:10,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2024-12-02 13:25:10,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-12-02 13:25:11,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2024-12-02 13:25:11,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2024-12-02 13:25:11,559 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 13:25:11,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2024-12-02 13:25:11,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-12-02 13:25:18,560 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 85 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-12-02 13:25:18,561 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:25:22,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114784605] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:25:22,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:25:22,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 30] total 42 [2024-12-02 13:25:22,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511724198] [2024-12-02 13:25:22,808 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 13:25:22,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-12-02 13:25:22,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:25:22,811 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-12-02 13:25:22,811 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2016, Unknown=0, NotChecked=0, Total=2162 [2024-12-02 13:25:22,811 INFO L87 Difference]: Start difference. First operand 272 states and 316 transitions. Second operand has 42 states, 35 states have (on average 4.628571428571429) internal successors, (162), 36 states have internal predecessors, (162), 16 states have call successors, (47), 4 states have call predecessors, (47), 14 states have return successors, (47), 16 states have call predecessors, (47), 16 states have call successors, (47) [2024-12-02 13:26:01,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:26:01,218 INFO L93 Difference]: Finished difference Result 603 states and 688 transitions. [2024-12-02 13:26:01,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-12-02 13:26:01,219 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 35 states have (on average 4.628571428571429) internal successors, (162), 36 states have internal predecessors, (162), 16 states have call successors, (47), 4 states have call predecessors, (47), 14 states have return successors, (47), 16 states have call predecessors, (47), 16 states have call successors, (47) Word has length 176 [2024-12-02 13:26:01,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:26:01,222 INFO L225 Difference]: With dead ends: 603 [2024-12-02 13:26:01,222 INFO L226 Difference]: Without dead ends: 412 [2024-12-02 13:26:01,224 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 156 SyntacticMatches, 6 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1606 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=477, Invalid=7355, Unknown=0, NotChecked=0, Total=7832 [2024-12-02 13:26:01,224 INFO L435 NwaCegarLoop]: 262 mSDtfsCounter, 200 mSDsluCounter, 5576 mSDsCounter, 0 mSdLazyCounter, 3401 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 5838 SdHoareTripleChecker+Invalid, 3485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 3401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.1s IncrementalHoareTripleChecker+Time [2024-12-02 13:26:01,225 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 5838 Invalid, 3485 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [84 Valid, 3401 Invalid, 0 Unknown, 0 Unchecked, 25.1s Time] [2024-12-02 13:26:01,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2024-12-02 13:26:01,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 375. [2024-12-02 13:26:01,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 250 states have (on average 1.096) internal successors, (274), 256 states have internal predecessors, (274), 72 states have call successors, (72), 44 states have call predecessors, (72), 52 states have return successors, (79), 75 states have call predecessors, (79), 69 states have call successors, (79) [2024-12-02 13:26:01,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 425 transitions. [2024-12-02 13:26:01,256 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 425 transitions. Word has length 176 [2024-12-02 13:26:01,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:26:01,256 INFO L471 AbstractCegarLoop]: Abstraction has 375 states and 425 transitions. [2024-12-02 13:26:01,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 35 states have (on average 4.628571428571429) internal successors, (162), 36 states have internal predecessors, (162), 16 states have call successors, (47), 4 states have call predecessors, (47), 14 states have return successors, (47), 16 states have call predecessors, (47), 16 states have call successors, (47) [2024-12-02 13:26:01,257 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 425 transitions. [2024-12-02 13:26:01,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2024-12-02 13:26:01,259 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:26:01,259 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:26:01,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-12-02 13:26:01,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:26:01,459 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:26:01,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:26:01,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1794112258, now seen corresponding path program 1 times [2024-12-02 13:26:01,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:26:01,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100828318] [2024-12-02 13:26:01,460 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:26:01,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:26:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:26:07,879 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2024-12-02 13:26:07,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:26:07,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100828318] [2024-12-02 13:26:07,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100828318] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:26:07,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301110009] [2024-12-02 13:26:07,880 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:26:07,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:26:07,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:26:07,882 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:26:07,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 13:26:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:26:14,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 4708 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 13:26:14,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:26:14,972 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-12-02 13:26:14,972 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:26:14,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301110009] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:26:14,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 13:26:14,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2024-12-02 13:26:14,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107036742] [2024-12-02 13:26:14,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:26:14,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 13:26:14,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:26:14,973 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 13:26:14,973 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-12-02 13:26:14,973 INFO L87 Difference]: Start difference. First operand 375 states and 425 transitions. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 3 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2024-12-02 13:26:15,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:26:15,526 INFO L93 Difference]: Finished difference Result 667 states and 753 transitions. [2024-12-02 13:26:15,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 13:26:15,527 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 3 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 179 [2024-12-02 13:26:15,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:26:15,529 INFO L225 Difference]: With dead ends: 667 [2024-12-02 13:26:15,529 INFO L226 Difference]: Without dead ends: 373 [2024-12-02 13:26:15,529 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-12-02 13:26:15,530 INFO L435 NwaCegarLoop]: 156 mSDtfsCounter, 0 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 13:26:15,530 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 754 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 13:26:15,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2024-12-02 13:26:15,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 363. [2024-12-02 13:26:15,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 241 states have (on average 1.0829875518672198) internal successors, (261), 246 states have internal predecessors, (261), 72 states have call successors, (72), 44 states have call predecessors, (72), 49 states have return successors, (76), 73 states have call predecessors, (76), 69 states have call successors, (76) [2024-12-02 13:26:15,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 409 transitions. [2024-12-02 13:26:15,558 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 409 transitions. Word has length 179 [2024-12-02 13:26:15,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:26:15,558 INFO L471 AbstractCegarLoop]: Abstraction has 363 states and 409 transitions. [2024-12-02 13:26:15,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 3 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2024-12-02 13:26:15,559 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 409 transitions. [2024-12-02 13:26:15,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2024-12-02 13:26:15,559 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:26:15,560 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:26:15,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 13:26:15,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:26:15,760 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:26:15,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:26:15,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1281796685, now seen corresponding path program 1 times [2024-12-02 13:26:15,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:26:15,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916486407] [2024-12-02 13:26:15,761 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:26:15,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:26:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:26:27,955 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2024-12-02 13:26:27,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:26:27,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916486407] [2024-12-02 13:26:27,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916486407] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:26:27,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661205542] [2024-12-02 13:26:27,956 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:26:27,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:26:27,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:26:27,958 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:26:27,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 13:26:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:26:49,382 INFO L256 TraceCheckSpWp]: Trace formula consists of 4799 conjuncts, 171 conjuncts are in the unsatisfiable core [2024-12-02 13:26:49,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:26:49,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-12-02 13:26:52,501 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 27 treesize of output 1 [2024-12-02 13:26:52,515 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 [2024-12-02 13:26:52,542 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 15 treesize of output 1 [2024-12-02 13:27:02,550 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 125 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-12-02 13:27:02,550 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:27:15,191 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2024-12-02 13:27:15,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661205542] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:27:15,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:27:15,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 32, 14] total 53 [2024-12-02 13:27:15,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889714574] [2024-12-02 13:27:15,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:27:15,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-12-02 13:27:15,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:27:15,194 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-12-02 13:27:15,195 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2581, Unknown=0, NotChecked=0, Total=2756 [2024-12-02 13:27:15,196 INFO L87 Difference]: Start difference. First operand 363 states and 409 transitions. Second operand has 53 states, 44 states have (on average 4.136363636363637) internal successors, (182), 39 states have internal predecessors, (182), 14 states have call successors, (50), 4 states have call predecessors, (50), 18 states have return successors, (53), 16 states have call predecessors, (53), 14 states have call successors, (53) [2024-12-02 13:27:36,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:27:36,420 INFO L93 Difference]: Finished difference Result 525 states and 588 transitions. [2024-12-02 13:27:36,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-12-02 13:27:36,421 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 44 states have (on average 4.136363636363637) internal successors, (182), 39 states have internal predecessors, (182), 14 states have call successors, (50), 4 states have call predecessors, (50), 18 states have return successors, (53), 16 states have call predecessors, (53), 14 states have call successors, (53) Word has length 185 [2024-12-02 13:27:36,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:27:36,424 INFO L225 Difference]: With dead ends: 525 [2024-12-02 13:27:36,425 INFO L226 Difference]: Without dead ends: 389 [2024-12-02 13:27:36,426 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 331 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=295, Invalid=4961, Unknown=0, NotChecked=0, Total=5256 [2024-12-02 13:27:36,426 INFO L435 NwaCegarLoop]: 183 mSDtfsCounter, 114 mSDsluCounter, 4772 mSDsCounter, 0 mSdLazyCounter, 2246 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 4955 SdHoareTripleChecker+Invalid, 2295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2024-12-02 13:27:36,427 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 4955 Invalid, 2295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2246 Invalid, 0 Unknown, 0 Unchecked, 15.5s Time] [2024-12-02 13:27:36,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2024-12-02 13:27:36,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 352. [2024-12-02 13:27:36,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 233 states have (on average 1.0815450643776825) internal successors, (252), 237 states have internal predecessors, (252), 72 states have call successors, (72), 44 states have call predecessors, (72), 46 states have return successors, (72), 71 states have call predecessors, (72), 69 states have call successors, (72) [2024-12-02 13:27:36,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 396 transitions. [2024-12-02 13:27:36,458 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 396 transitions. Word has length 185 [2024-12-02 13:27:36,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:27:36,458 INFO L471 AbstractCegarLoop]: Abstraction has 352 states and 396 transitions. [2024-12-02 13:27:36,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 44 states have (on average 4.136363636363637) internal successors, (182), 39 states have internal predecessors, (182), 14 states have call successors, (50), 4 states have call predecessors, (50), 18 states have return successors, (53), 16 states have call predecessors, (53), 14 states have call successors, (53) [2024-12-02 13:27:36,458 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 396 transitions. [2024-12-02 13:27:36,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2024-12-02 13:27:36,459 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:27:36,459 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:27:36,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-12-02 13:27:36,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-12-02 13:27:36,660 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:27:36,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:27:36,660 INFO L85 PathProgramCache]: Analyzing trace with hash -981136150, now seen corresponding path program 1 times [2024-12-02 13:27:36,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:27:36,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246923207] [2024-12-02 13:27:36,660 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:27:36,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:27:42,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:27:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2024-12-02 13:27:51,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:27:51,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246923207] [2024-12-02 13:27:51,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246923207] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:27:51,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:27:51,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2024-12-02 13:27:51,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498698582] [2024-12-02 13:27:51,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:27:51,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 13:27:51,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:27:51,113 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 13:27:51,113 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2024-12-02 13:27:51,114 INFO L87 Difference]: Start difference. First operand 352 states and 396 transitions. Second operand has 18 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 9 states have call successors, (26), 2 states have call predecessors, (26), 7 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2024-12-02 13:27:54,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:27:54,222 INFO L93 Difference]: Finished difference Result 461 states and 521 transitions. [2024-12-02 13:27:54,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-12-02 13:27:54,222 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 9 states have call successors, (26), 2 states have call predecessors, (26), 7 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) Word has length 187 [2024-12-02 13:27:54,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:27:54,224 INFO L225 Difference]: With dead ends: 461 [2024-12-02 13:27:54,225 INFO L226 Difference]: Without dead ends: 390 [2024-12-02 13:27:54,225 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2024-12-02 13:27:54,225 INFO L435 NwaCegarLoop]: 152 mSDtfsCounter, 23 mSDsluCounter, 1940 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 2092 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-12-02 13:27:54,225 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 2092 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-12-02 13:27:54,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2024-12-02 13:27:54,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 363. [2024-12-02 13:27:54,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 241 states have (on average 1.0788381742738589) internal successors, (260), 245 states have internal predecessors, (260), 73 states have call successors, (73), 44 states have call predecessors, (73), 48 states have return successors, (75), 74 states have call predecessors, (75), 70 states have call successors, (75) [2024-12-02 13:27:54,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 408 transitions. [2024-12-02 13:27:54,258 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 408 transitions. Word has length 187 [2024-12-02 13:27:54,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:27:54,259 INFO L471 AbstractCegarLoop]: Abstraction has 363 states and 408 transitions. [2024-12-02 13:27:54,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 9 states have call successors, (26), 2 states have call predecessors, (26), 7 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2024-12-02 13:27:54,259 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 408 transitions. [2024-12-02 13:27:54,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2024-12-02 13:27:54,260 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:27:54,260 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:27:54,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-12-02 13:27:54,260 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:27:54,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:27:54,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1876316328, now seen corresponding path program 1 times [2024-12-02 13:27:54,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:27:54,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877810684] [2024-12-02 13:27:54,260 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:27:54,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:28:00,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:28:08,869 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2024-12-02 13:28:08,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:28:08,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877810684] [2024-12-02 13:28:08,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877810684] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:28:08,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:28:08,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2024-12-02 13:28:08,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826011427] [2024-12-02 13:28:08,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:28:08,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 13:28:08,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:28:08,870 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 13:28:08,870 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2024-12-02 13:28:08,870 INFO L87 Difference]: Start difference. First operand 363 states and 408 transitions. Second operand has 18 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (26), 2 states have call predecessors, (26), 7 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2024-12-02 13:28:12,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:28:12,180 INFO L93 Difference]: Finished difference Result 651 states and 727 transitions. [2024-12-02 13:28:12,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-12-02 13:28:12,181 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (26), 2 states have call predecessors, (26), 7 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) Word has length 186 [2024-12-02 13:28:12,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:28:12,183 INFO L225 Difference]: With dead ends: 651 [2024-12-02 13:28:12,183 INFO L226 Difference]: Without dead ends: 387 [2024-12-02 13:28:12,184 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2024-12-02 13:28:12,184 INFO L435 NwaCegarLoop]: 155 mSDtfsCounter, 26 mSDsluCounter, 2132 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 2287 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-12-02 13:28:12,184 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 2287 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-12-02 13:28:12,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2024-12-02 13:28:12,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 374. [2024-12-02 13:28:12,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 249 states have (on average 1.0763052208835342) internal successors, (268), 253 states have internal predecessors, (268), 74 states have call successors, (74), 44 states have call predecessors, (74), 50 states have return successors, (79), 77 states have call predecessors, (79), 71 states have call successors, (79) [2024-12-02 13:28:12,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 421 transitions. [2024-12-02 13:28:12,218 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 421 transitions. Word has length 186 [2024-12-02 13:28:12,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:28:12,219 INFO L471 AbstractCegarLoop]: Abstraction has 374 states and 421 transitions. [2024-12-02 13:28:12,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (26), 2 states have call predecessors, (26), 7 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2024-12-02 13:28:12,219 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 421 transitions. [2024-12-02 13:28:12,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2024-12-02 13:28:12,220 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:28:12,220 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:28:12,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-12-02 13:28:12,220 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:28:12,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:28:12,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1779106551, now seen corresponding path program 1 times [2024-12-02 13:28:12,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:28:12,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353173666] [2024-12-02 13:28:12,221 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:28:12,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:28:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:28:17,283 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-12-02 13:28:17,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:28:17,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353173666] [2024-12-02 13:28:17,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353173666] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:28:17,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:28:17,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-12-02 13:28:17,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253973253] [2024-12-02 13:28:17,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:28:17,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 13:28:17,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:28:17,284 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 13:28:17,284 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-12-02 13:28:17,285 INFO L87 Difference]: Start difference. First operand 374 states and 421 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 6 states have internal predecessors, (82), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) [2024-12-02 13:28:17,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:28:17,472 INFO L93 Difference]: Finished difference Result 682 states and 771 transitions. [2024-12-02 13:28:17,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 13:28:17,473 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 6 states have internal predecessors, (82), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) Word has length 193 [2024-12-02 13:28:17,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:28:17,476 INFO L225 Difference]: With dead ends: 682 [2024-12-02 13:28:17,476 INFO L226 Difference]: Without dead ends: 346 [2024-12-02 13:28:17,477 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-12-02 13:28:17,477 INFO L435 NwaCegarLoop]: 164 mSDtfsCounter, 0 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 13:28:17,478 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 971 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 13:28:17,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2024-12-02 13:28:17,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2024-12-02 13:28:17,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 230 states have (on average 1.0608695652173914) internal successors, (244), 234 states have internal predecessors, (244), 69 states have call successors, (69), 44 states have call predecessors, (69), 46 states have return successors, (69), 68 states have call predecessors, (69), 66 states have call successors, (69) [2024-12-02 13:28:17,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 382 transitions. [2024-12-02 13:28:17,518 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 382 transitions. Word has length 193 [2024-12-02 13:28:17,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:28:17,519 INFO L471 AbstractCegarLoop]: Abstraction has 346 states and 382 transitions. [2024-12-02 13:28:17,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 6 states have internal predecessors, (82), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) [2024-12-02 13:28:17,519 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 382 transitions. [2024-12-02 13:28:17,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2024-12-02 13:28:17,520 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:28:17,520 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:28:17,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-12-02 13:28:17,520 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:28:17,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:28:17,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1581454786, now seen corresponding path program 1 times [2024-12-02 13:28:17,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:28:17,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635107281] [2024-12-02 13:28:17,521 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:28:17,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:28:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:28:44,257 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 26 proven. 17 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2024-12-02 13:28:44,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:28:44,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635107281] [2024-12-02 13:28:44,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635107281] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:28:44,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523401891] [2024-12-02 13:28:44,257 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:28:44,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:28:44,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:28:44,259 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:28:44,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-12-02 13:28:51,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:28:51,541 INFO L256 TraceCheckSpWp]: Trace formula consists of 4844 conjuncts, 138 conjuncts are in the unsatisfiable core [2024-12-02 13:28:51,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:28:52,363 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 [2024-12-02 13:28:52,393 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 27 treesize of output 1 [2024-12-02 13:28:52,407 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 15 treesize of output 1 [2024-12-02 13:29:06,675 INFO L349 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2024-12-02 13:29:06,675 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 24 treesize of output 36 [2024-12-02 13:29:06,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-12-02 13:29:06,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2024-12-02 13:29:06,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2024-12-02 13:29:06,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 66 [2024-12-02 13:29:06,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2024-12-02 13:29:06,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 44 [2024-12-02 13:29:06,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 13:29:06,911 INFO L349 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2024-12-02 13:29:06,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 24 [2024-12-02 13:29:06,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 13:29:06,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-12-02 13:29:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 116 proven. 11 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-12-02 13:29:16,015 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:29:21,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523401891] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:29:21,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:29:21,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 57 [2024-12-02 13:29:21,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924670639] [2024-12-02 13:29:21,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 13:29:21,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-12-02 13:29:21,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:29:21,088 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-12-02 13:29:21,089 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=3579, Unknown=0, NotChecked=0, Total=3782 [2024-12-02 13:29:21,089 INFO L87 Difference]: Start difference. First operand 346 states and 382 transitions. Second operand has 57 states, 45 states have (on average 3.6222222222222222) internal successors, (163), 50 states have internal predecessors, (163), 26 states have call successors, (44), 4 states have call predecessors, (44), 16 states have return successors, (44), 22 states have call predecessors, (44), 25 states have call successors, (44) [2024-12-02 13:30:07,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:30:07,636 INFO L93 Difference]: Finished difference Result 395 states and 431 transitions. [2024-12-02 13:30:07,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2024-12-02 13:30:07,636 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 45 states have (on average 3.6222222222222222) internal successors, (163), 50 states have internal predecessors, (163), 26 states have call successors, (44), 4 states have call predecessors, (44), 16 states have return successors, (44), 22 states have call predecessors, (44), 25 states have call successors, (44) Word has length 193 [2024-12-02 13:30:07,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:30:07,639 INFO L225 Difference]: With dead ends: 395 [2024-12-02 13:30:07,639 INFO L226 Difference]: Without dead ends: 373 [2024-12-02 13:30:07,641 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 181 SyntacticMatches, 6 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3112 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=601, Invalid=12055, Unknown=0, NotChecked=0, Total=12656 [2024-12-02 13:30:07,642 INFO L435 NwaCegarLoop]: 187 mSDtfsCounter, 172 mSDsluCounter, 5211 mSDsCounter, 0 mSdLazyCounter, 4013 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 5398 SdHoareTripleChecker+Invalid, 4108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 4013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.4s IncrementalHoareTripleChecker+Time [2024-12-02 13:30:07,642 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 5398 Invalid, 4108 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [95 Valid, 4013 Invalid, 0 Unknown, 0 Unchecked, 28.4s Time] [2024-12-02 13:30:07,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2024-12-02 13:30:07,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 346. [2024-12-02 13:30:07,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 230 states have (on average 1.0565217391304347) internal successors, (243), 234 states have internal predecessors, (243), 69 states have call successors, (69), 44 states have call predecessors, (69), 46 states have return successors, (69), 68 states have call predecessors, (69), 66 states have call successors, (69) [2024-12-02 13:30:07,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 381 transitions. [2024-12-02 13:30:07,682 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 381 transitions. Word has length 193 [2024-12-02 13:30:07,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:30:07,682 INFO L471 AbstractCegarLoop]: Abstraction has 346 states and 381 transitions. [2024-12-02 13:30:07,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 45 states have (on average 3.6222222222222222) internal successors, (163), 50 states have internal predecessors, (163), 26 states have call successors, (44), 4 states have call predecessors, (44), 16 states have return successors, (44), 22 states have call predecessors, (44), 25 states have call successors, (44) [2024-12-02 13:30:07,682 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 381 transitions. [2024-12-02 13:30:07,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2024-12-02 13:30:07,683 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:30:07,683 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:30:07,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-12-02 13:30:07,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:30:07,884 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:30:07,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:30:07,884 INFO L85 PathProgramCache]: Analyzing trace with hash 181404230, now seen corresponding path program 1 times [2024-12-02 13:30:07,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:30:07,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404623871] [2024-12-02 13:30:07,884 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:30:07,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:30:15,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:30:26,024 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 12 proven. 34 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2024-12-02 13:30:26,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:30:26,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404623871] [2024-12-02 13:30:26,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404623871] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:30:26,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082972496] [2024-12-02 13:30:26,025 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:30:26,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:30:26,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:30:26,027 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:30:26,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-02 13:30:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:30:33,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 4846 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-12-02 13:30:33,499 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:30:35,004 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 15 treesize of output 1 [2024-12-02 13:30:35,020 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 15 treesize of output 1 [2024-12-02 13:30:35,036 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 39 treesize of output 1 [2024-12-02 13:30:40,300 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-12-02 13:30:40,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 53 [2024-12-02 13:30:40,318 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-12-02 13:30:40,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 23 [2024-12-02 13:30:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 121 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-12-02 13:30:40,325 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:30:44,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082972496] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:30:44,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:30:44,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 35 [2024-12-02 13:30:44,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090563828] [2024-12-02 13:30:44,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 13:30:44,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-12-02 13:30:44,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:30:44,893 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-12-02 13:30:44,894 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1453, Unknown=0, NotChecked=0, Total=1560 [2024-12-02 13:30:44,894 INFO L87 Difference]: Start difference. First operand 346 states and 381 transitions. Second operand has 35 states, 29 states have (on average 5.793103448275862) internal successors, (168), 29 states have internal predecessors, (168), 12 states have call successors, (43), 3 states have call predecessors, (43), 12 states have return successors, (43), 12 states have call predecessors, (43), 12 states have call successors, (43) [2024-12-02 13:31:09,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:31:09,409 INFO L93 Difference]: Finished difference Result 628 states and 704 transitions. [2024-12-02 13:31:09,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-12-02 13:31:09,410 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 29 states have (on average 5.793103448275862) internal successors, (168), 29 states have internal predecessors, (168), 12 states have call successors, (43), 3 states have call predecessors, (43), 12 states have return successors, (43), 12 states have call predecessors, (43), 12 states have call successors, (43) Word has length 194 [2024-12-02 13:31:09,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:31:09,412 INFO L225 Difference]: With dead ends: 628 [2024-12-02 13:31:09,413 INFO L226 Difference]: Without dead ends: 479 [2024-12-02 13:31:09,415 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 278 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=256, Invalid=3776, Unknown=0, NotChecked=0, Total=4032 [2024-12-02 13:31:09,416 INFO L435 NwaCegarLoop]: 191 mSDtfsCounter, 103 mSDsluCounter, 4852 mSDsCounter, 0 mSdLazyCounter, 2459 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 5043 SdHoareTripleChecker+Invalid, 2493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.6s IncrementalHoareTripleChecker+Time [2024-12-02 13:31:09,417 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 5043 Invalid, 2493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2459 Invalid, 0 Unknown, 0 Unchecked, 17.6s Time] [2024-12-02 13:31:09,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2024-12-02 13:31:09,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 385. [2024-12-02 13:31:09,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 257 states have (on average 1.046692607003891) internal successors, (269), 262 states have internal predecessors, (269), 76 states have call successors, (76), 47 states have call predecessors, (76), 51 states have return successors, (78), 76 states have call predecessors, (78), 73 states have call successors, (78) [2024-12-02 13:31:09,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 423 transitions. [2024-12-02 13:31:09,482 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 423 transitions. Word has length 194 [2024-12-02 13:31:09,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:31:09,482 INFO L471 AbstractCegarLoop]: Abstraction has 385 states and 423 transitions. [2024-12-02 13:31:09,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 29 states have (on average 5.793103448275862) internal successors, (168), 29 states have internal predecessors, (168), 12 states have call successors, (43), 3 states have call predecessors, (43), 12 states have return successors, (43), 12 states have call predecessors, (43), 12 states have call successors, (43) [2024-12-02 13:31:09,483 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 423 transitions. [2024-12-02 13:31:09,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2024-12-02 13:31:09,484 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:31:09,484 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:31:09,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-12-02 13:31:09,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:31:09,685 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:31:09,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:31:09,685 INFO L85 PathProgramCache]: Analyzing trace with hash 85602121, now seen corresponding path program 2 times [2024-12-02 13:31:09,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:31:09,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961060012] [2024-12-02 13:31:09,685 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:31:09,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:31:18,093 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:31:18,093 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:31:34,584 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2024-12-02 13:31:34,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:31:34,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961060012] [2024-12-02 13:31:34,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961060012] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:31:34,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53726169] [2024-12-02 13:31:34,585 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:31:34,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:31:34,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:31:34,587 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:31:34,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f96db3-173a-463b-a028-e88ff012b8e5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process