./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_next_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_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/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_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/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_bcffa891-5b3a-425c-8194-cd28371ad79d/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 b9d976a5c157b7db1e6b0f8b3d73c13a2dd8a00281a198d3aafefb7aed58d842 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 12:23:12,557 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 12:23:12,612 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-64bit-Automizer_Default.epf [2024-12-02 12:23:12,616 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 12:23:12,616 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 12:23:12,637 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 12:23:12,637 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 12:23:12,638 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 12:23:12,638 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 12:23:12,638 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 12:23:12,638 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 12:23:12,638 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 12:23:12,639 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 12:23:12,639 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 12:23:12,639 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 12:23:12,639 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 12:23:12,639 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 12:23:12,639 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 12:23:12,639 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 12:23:12,639 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 12:23:12,640 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 12:23:12,640 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 12:23:12,640 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 12:23:12,640 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 12:23:12,640 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 12:23:12,640 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 12:23:12,640 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 12:23:12,640 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 12:23:12,640 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 12:23:12,640 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 12:23:12,641 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 12:23:12,641 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 12:23:12,641 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 12:23:12,641 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 12:23:12,641 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 12:23:12,641 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 12:23:12,641 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 12:23:12,641 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 12:23:12,641 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 12:23:12,642 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 12:23:12,642 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 12:23:12,642 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 12:23:12,642 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 12:23:12,642 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 12:23:12,642 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 12:23:12,642 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_bcffa891-5b3a-425c-8194-cd28371ad79d/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 -> b9d976a5c157b7db1e6b0f8b3d73c13a2dd8a00281a198d3aafefb7aed58d842 [2024-12-02 12:23:12,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 12:23:12,849 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 12:23:12,851 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 12:23:12,852 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 12:23:12,852 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 12:23:12,853 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i [2024-12-02 12:23:15,472 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/data/0bfac49b4/7b8770a950f74e4e90c0648e761875a1/FLAG8b101bd58 [2024-12-02 12:23:15,821 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 12:23:15,822 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i [2024-12-02 12:23:15,845 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/data/0bfac49b4/7b8770a950f74e4e90c0648e761875a1/FLAG8b101bd58 [2024-12-02 12:23:16,045 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/data/0bfac49b4/7b8770a950f74e4e90c0648e761875a1 [2024-12-02 12:23:16,047 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 12:23:16,048 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 12:23:16,049 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 12:23:16,049 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 12:23:16,052 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 12:23:16,052 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:23:16" (1/1) ... [2024-12-02 12:23:16,053 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76c4ec71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:23:16, skipping insertion in model container [2024-12-02 12:23:16,053 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:23:16" (1/1) ... [2024-12-02 12:23:16,101 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 12:23:16,278 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_bcffa891-5b3a-425c-8194-cd28371ad79d/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4494,4507] [2024-12-02 12:23:16,283 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_bcffa891-5b3a-425c-8194-cd28371ad79d/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4554,4567] [2024-12-02 12:23:16,854 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 12:23:16,855 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 12:23:16,855 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 12:23:16,856 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 12:23:16,857 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 12:23:16,872 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 12:23:16,872 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 12:23:16,874 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 12:23:16,875 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 12:23:16,876 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 12:23:16,877 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 12:23:16,877 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 12:23:16,878 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 12:23:17,301 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[150474,150487] [2024-12-02 12:23:17,302 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 12:23:17,317 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 12:23:17,329 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_bcffa891-5b3a-425c-8194-cd28371ad79d/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4494,4507] [2024-12-02 12:23:17,330 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_bcffa891-5b3a-425c-8194-cd28371ad79d/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4554,4567] [2024-12-02 12:23:17,375 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 12:23:17,375 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 12:23:17,376 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 12:23:17,376 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 12:23:17,377 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 12:23:17,386 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 12:23:17,386 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 12:23:17,387 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 12:23:17,387 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 12:23:17,388 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 12:23:17,389 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 12:23:17,389 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 12:23:17,390 WARN L1675 CHandler]: Possible shadowing of function index [2024-12-02 12:23:17,487 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_bcffa891-5b3a-425c-8194-cd28371ad79d/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[150474,150487] [2024-12-02 12:23:17,487 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 12:23:17,638 INFO L204 MainTranslator]: Completed translation [2024-12-02 12:23:17,638 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:23:17 WrapperNode [2024-12-02 12:23:17,638 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 12:23:17,639 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 12:23:17,639 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 12:23:17,639 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 12:23:17,643 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:23:17" (1/1) ... [2024-12-02 12:23:17,688 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:23:17" (1/1) ... [2024-12-02 12:23:17,712 INFO L138 Inliner]: procedures = 668, calls = 1039, calls flagged for inlining = 51, calls inlined = 4, statements flattened = 56 [2024-12-02 12:23:17,712 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 12:23:17,713 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 12:23:17,713 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 12:23:17,713 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 12:23:17,719 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:23:17" (1/1) ... [2024-12-02 12:23:17,719 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:23:17" (1/1) ... [2024-12-02 12:23:17,722 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:23:17" (1/1) ... [2024-12-02 12:23:17,737 INFO L175 MemorySlicer]: Split 17 memory accesses to 4 slices as follows [2, 5, 6, 4]. 35 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0, 0]. The 2 writes are split as follows [0, 0, 1, 1]. [2024-12-02 12:23:17,738 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:23:17" (1/1) ... [2024-12-02 12:23:17,738 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:23:17" (1/1) ... [2024-12-02 12:23:17,748 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:23:17" (1/1) ... [2024-12-02 12:23:17,749 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:23:17" (1/1) ... [2024-12-02 12:23:17,751 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:23:17" (1/1) ... [2024-12-02 12:23:17,754 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:23:17" (1/1) ... [2024-12-02 12:23:17,755 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:23:17" (1/1) ... [2024-12-02 12:23:17,759 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 12:23:17,760 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 12:23:17,760 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 12:23:17,760 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 12:23:17,761 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:23:17" (1/1) ... [2024-12-02 12:23:17,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 12:23:17,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:23:17,791 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 12:23:17,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 12:23:17,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-12-02 12:23:17,813 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-12-02 12:23:17,813 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-12-02 12:23:17,813 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2024-12-02 12:23:17,813 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2024-12-02 12:23:17,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 12:23:17,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-12-02 12:23:17,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-12-02 12:23:17,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-12-02 12:23:17,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-12-02 12:23:17,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 12:23:17,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 12:23:17,814 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-12-02 12:23:17,814 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-12-02 12:23:17,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-12-02 12:23:17,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-12-02 12:23:17,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-12-02 12:23:17,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-12-02 12:23:17,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-12-02 12:23:17,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-12-02 12:23:17,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-12-02 12:23:17,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-12-02 12:23:17,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-12-02 12:23:17,815 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2024-12-02 12:23:17,815 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2024-12-02 12:23:17,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 12:23:17,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 12:23:17,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-12-02 12:23:17,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-12-02 12:23:17,992 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 12:23:17,994 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 12:23:18,139 INFO L? ?]: Removed 31 outVars from TransFormulas that were not future-live. [2024-12-02 12:23:18,139 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 12:23:18,148 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 12:23:18,148 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2024-12-02 12:23:18,148 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:23:18 BoogieIcfgContainer [2024-12-02 12:23:18,148 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 12:23:18,150 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 12:23:18,150 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 12:23:18,154 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 12:23:18,155 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:23:16" (1/3) ... [2024-12-02 12:23:18,155 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24cbb517 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:23:18, skipping insertion in model container [2024-12-02 12:23:18,155 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:23:17" (2/3) ... [2024-12-02 12:23:18,155 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24cbb517 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:23:18, skipping insertion in model container [2024-12-02 12:23:18,155 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:23:18" (3/3) ... [2024-12-02 12:23:18,157 INFO L128 eAbstractionObserver]: Analyzing ICFG aws_linked_list_next_harness.i [2024-12-02 12:23:18,171 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 12:23:18,172 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG aws_linked_list_next_harness.i that has 5 procedures, 50 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-12-02 12:23:18,216 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 12:23:18,226 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;@4778ccb9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 12:23:18,226 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-12-02 12:23:18,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-12-02 12:23:18,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-12-02 12:23:18,236 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:23:18,236 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:23:18,237 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:23:18,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:23:18,242 INFO L85 PathProgramCache]: Analyzing trace with hash 401849526, now seen corresponding path program 1 times [2024-12-02 12:23:18,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:23:18,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737363186] [2024-12-02 12:23:18,249 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:23:18,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:23:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:23:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-12-02 12:23:18,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:23:18,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737363186] [2024-12-02 12:23:18,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737363186] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:23:18,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:23:18,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 12:23:18,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398825504] [2024-12-02 12:23:18,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:23:18,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-12-02 12:23:18,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:23:18,528 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-12-02 12:23:18,528 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-12-02 12:23:18,530 INFO L87 Difference]: Start difference. First operand has 50 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-12-02 12:23:18,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:23:18,548 INFO L93 Difference]: Finished difference Result 94 states and 124 transitions. [2024-12-02 12:23:18,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-12-02 12:23:18,550 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2024-12-02 12:23:18,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:23:18,556 INFO L225 Difference]: With dead ends: 94 [2024-12-02 12:23:18,556 INFO L226 Difference]: Without dead ends: 45 [2024-12-02 12:23:18,559 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 12:23:18,562 INFO L435 NwaCegarLoop]: 61 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, 61 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 12:23:18,562 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 12:23:18,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-12-02 12:23:18,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-12-02 12:23:18,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-12-02 12:23:18,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2024-12-02 12:23:18,594 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 28 [2024-12-02 12:23:18,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:23:18,595 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2024-12-02 12:23:18,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-12-02 12:23:18,596 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2024-12-02 12:23:18,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-12-02 12:23:18,597 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:23:18,597 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:23:18,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 12:23:18,597 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:23:18,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:23:18,598 INFO L85 PathProgramCache]: Analyzing trace with hash -619218828, now seen corresponding path program 1 times [2024-12-02 12:23:18,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:23:18,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591537691] [2024-12-02 12:23:18,598 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:23:18,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:23:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:23:20,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 12:23:20,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:23:20,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591537691] [2024-12-02 12:23:20,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591537691] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:23:20,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469497148] [2024-12-02 12:23:20,519 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:23:20,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:23:20,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:23:20,522 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:23:20,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 12:23:20,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:23:20,664 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-12-02 12:23:20,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:23:20,710 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 12:23:20,712 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 12:23:20,715 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 25 treesize of output 17 [2024-12-02 12:23:20,728 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 25 treesize of output 17 [2024-12-02 12:23:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 12:23:22,401 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 12:23:22,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469497148] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:23:22,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 12:23:22,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15] total 26 [2024-12-02 12:23:22,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023301191] [2024-12-02 12:23:22,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:23:22,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 12:23:22,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:23:22,403 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 12:23:22,403 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2024-12-02 12:23:22,404 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-12-02 12:23:23,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:23:23,018 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2024-12-02 12:23:23,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 12:23:23,019 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2024-12-02 12:23:23,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:23:23,021 INFO L225 Difference]: With dead ends: 56 [2024-12-02 12:23:23,021 INFO L226 Difference]: Without dead ends: 54 [2024-12-02 12:23:23,021 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2024-12-02 12:23:23,022 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 47 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 12:23:23,022 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 299 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 12:23:23,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-12-02 12:23:23,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2024-12-02 12:23:23,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2024-12-02 12:23:23,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2024-12-02 12:23:23,035 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 28 [2024-12-02 12:23:23,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:23:23,035 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2024-12-02 12:23:23,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-12-02 12:23:23,035 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2024-12-02 12:23:23,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-12-02 12:23:23,036 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:23:23,036 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:23:23,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 12:23:23,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:23:23,237 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:23:23,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:23:23,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1428565454, now seen corresponding path program 1 times [2024-12-02 12:23:23,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:23:23,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107975940] [2024-12-02 12:23:23,237 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:23:23,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:23:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:23:23,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 12:23:23,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:23:23,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107975940] [2024-12-02 12:23:23,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107975940] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:23:23,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:23:23,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-12-02 12:23:23,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393899592] [2024-12-02 12:23:23,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:23:23,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 12:23:23,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:23:23,481 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 12:23:23,481 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-12-02 12:23:23,481 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-12-02 12:23:23,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:23:23,617 INFO L93 Difference]: Finished difference Result 108 states and 135 transitions. [2024-12-02 12:23:23,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 12:23:23,618 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2024-12-02 12:23:23,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:23:23,620 INFO L225 Difference]: With dead ends: 108 [2024-12-02 12:23:23,620 INFO L226 Difference]: Without dead ends: 58 [2024-12-02 12:23:23,620 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-12-02 12:23:23,621 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 11 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:23:23,621 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 201 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 12:23:23,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-12-02 12:23:23,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-12-02 12:23:23,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2024-12-02 12:23:23,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2024-12-02 12:23:23,633 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 28 [2024-12-02 12:23:23,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:23:23,633 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2024-12-02 12:23:23,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-12-02 12:23:23,634 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2024-12-02 12:23:23,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-12-02 12:23:23,634 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:23:23,634 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:23:23,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-12-02 12:23:23,634 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:23:23,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:23:23,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1821592464, now seen corresponding path program 1 times [2024-12-02 12:23:23,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:23:23,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480884047] [2024-12-02 12:23:23,635 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:23:23,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:23:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:23:23,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 12:23:23,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:23:23,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480884047] [2024-12-02 12:23:23,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480884047] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:23:23,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761057083] [2024-12-02 12:23:23,816 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:23:23,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:23:23,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:23:23,818 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:23:23,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 12:23:23,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:23:23,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 12:23:23,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:23:24,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 12:23:24,011 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 12:23:24,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761057083] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:23:24,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 12:23:24,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2024-12-02 12:23:24,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705791848] [2024-12-02 12:23:24,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:23:24,012 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 12:23:24,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:23:24,013 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 12:23:24,013 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-12-02 12:23:24,013 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-12-02 12:23:24,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:23:24,104 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2024-12-02 12:23:24,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 12:23:24,106 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2024-12-02 12:23:24,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:23:24,107 INFO L225 Difference]: With dead ends: 115 [2024-12-02 12:23:24,107 INFO L226 Difference]: Without dead ends: 60 [2024-12-02 12:23:24,107 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-12-02 12:23:24,108 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 51 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:23:24,108 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 178 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 12:23:24,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-12-02 12:23:24,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2024-12-02 12:23:24,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 37 states have internal predecessors, (41), 12 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2024-12-02 12:23:24,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2024-12-02 12:23:24,119 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 28 [2024-12-02 12:23:24,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:23:24,120 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2024-12-02 12:23:24,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-12-02 12:23:24,120 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2024-12-02 12:23:24,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-12-02 12:23:24,121 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:23:24,121 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-12-02 12:23:24,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 12:23:24,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:23:24,322 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:23:24,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:23:24,322 INFO L85 PathProgramCache]: Analyzing trace with hash -239457674, now seen corresponding path program 1 times [2024-12-02 12:23:24,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:23:24,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547089647] [2024-12-02 12:23:24,322 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:23:24,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:23:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:23:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 12:23:25,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:23:25,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547089647] [2024-12-02 12:23:25,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547089647] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:23:25,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190203587] [2024-12-02 12:23:25,508 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:23:25,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:23:25,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:23:25,510 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:23:25,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 12:23:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:23:25,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-12-02 12:23:25,647 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:23:25,657 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 12:23:25,660 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 19 treesize of output 11 [2024-12-02 12:23:25,665 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 12:23:25,670 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 19 treesize of output 11 [2024-12-02 12:23:26,980 INFO L349 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2024-12-02 12:23:26,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 106 [2024-12-02 12:23:27,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-12-02 12:23:27,040 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:23:27,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-12-02 12:23:27,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190203587] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 12:23:27,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 12:23:27,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [18, 13] total 36 [2024-12-02 12:23:27,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069563779] [2024-12-02 12:23:27,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:23:27,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 12:23:27,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:23:27,603 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 12:23:27,604 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1153, Unknown=0, NotChecked=0, Total=1260 [2024-12-02 12:23:27,604 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-12-02 12:23:27,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:23:27,912 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2024-12-02 12:23:27,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 12:23:27,912 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2024-12-02 12:23:27,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:23:27,913 INFO L225 Difference]: With dead ends: 65 [2024-12-02 12:23:27,913 INFO L226 Difference]: Without dead ends: 63 [2024-12-02 12:23:27,914 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=123, Invalid=1359, Unknown=0, NotChecked=0, Total=1482 [2024-12-02 12:23:27,915 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 11 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 12:23:27,915 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 343 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 12:23:27,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-12-02 12:23:27,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2024-12-02 12:23:27,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 40 states have (on average 1.15) internal successors, (46), 43 states have internal predecessors, (46), 13 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2024-12-02 12:23:27,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2024-12-02 12:23:27,928 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 42 [2024-12-02 12:23:27,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:23:27,929 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2024-12-02 12:23:27,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-12-02 12:23:27,929 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2024-12-02 12:23:27,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-12-02 12:23:27,930 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:23:27,930 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-12-02 12:23:27,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 12:23:28,130 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:23:28,130 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:23:28,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:23:28,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1048804300, now seen corresponding path program 1 times [2024-12-02 12:23:28,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:23:28,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276576102] [2024-12-02 12:23:28,131 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:23:28,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:23:28,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:23:29,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 12:23:29,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:23:29,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276576102] [2024-12-02 12:23:29,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276576102] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:23:29,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813441731] [2024-12-02 12:23:29,013 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:23:29,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:23:29,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:23:29,014 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:23:29,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 12:23:29,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:23:29,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-12-02 12:23:29,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:23:29,172 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 12:23:29,179 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 12:23:29,183 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 12:23:29,506 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 7 treesize of output 3 [2024-12-02 12:23:29,701 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 12:23:29,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2024-12-02 12:23:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:23:30,135 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:23:30,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-12-02 12:23:30,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813441731] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 12:23:30,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 12:23:30,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16, 13] total 35 [2024-12-02 12:23:30,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760215443] [2024-12-02 12:23:30,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:23:30,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 12:23:30,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:23:30,439 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 12:23:30,439 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2024-12-02 12:23:30,440 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-12-02 12:23:30,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:23:30,699 INFO L93 Difference]: Finished difference Result 107 states and 129 transitions. [2024-12-02 12:23:30,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 12:23:30,700 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2024-12-02 12:23:30,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:23:30,701 INFO L225 Difference]: With dead ends: 107 [2024-12-02 12:23:30,701 INFO L226 Difference]: Without dead ends: 67 [2024-12-02 12:23:30,702 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=149, Invalid=1573, Unknown=0, NotChecked=0, Total=1722 [2024-12-02 12:23:30,703 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 61 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:23:30,703 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 200 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 12:23:30,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-12-02 12:23:30,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-12-02 12:23:30,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 48 states have internal predecessors, (51), 13 states have call successors, (13), 6 states have call predecessors, (13), 9 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2024-12-02 12:23:30,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2024-12-02 12:23:30,721 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 42 [2024-12-02 12:23:30,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:23:30,721 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2024-12-02 12:23:30,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-12-02 12:23:30,721 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2024-12-02 12:23:30,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-12-02 12:23:30,722 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:23:30,722 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-12-02 12:23:30,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 12:23:30,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-12-02 12:23:30,923 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:23:30,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:23:30,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1441831310, now seen corresponding path program 1 times [2024-12-02 12:23:30,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:23:30,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306957981] [2024-12-02 12:23:30,923 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:23:30,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:23:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:23:31,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-12-02 12:23:31,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:23:31,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306957981] [2024-12-02 12:23:31,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306957981] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:23:31,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:23:31,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 12:23:31,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125671430] [2024-12-02 12:23:31,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:23:31,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 12:23:31,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:23:31,125 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 12:23:31,125 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-12-02 12:23:31,125 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-12-02 12:23:31,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:23:31,190 INFO L93 Difference]: Finished difference Result 119 states and 141 transitions. [2024-12-02 12:23:31,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 12:23:31,191 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2024-12-02 12:23:31,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:23:31,192 INFO L225 Difference]: With dead ends: 119 [2024-12-02 12:23:31,192 INFO L226 Difference]: Without dead ends: 69 [2024-12-02 12:23:31,192 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-12-02 12:23:31,193 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 4 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 12:23:31,193 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 235 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 12:23:31,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-12-02 12:23:31,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2024-12-02 12:23:31,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 45 states have internal predecessors, (49), 12 states have call successors, (12), 6 states have call predecessors, (12), 8 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2024-12-02 12:23:31,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2024-12-02 12:23:31,206 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 42 [2024-12-02 12:23:31,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:23:31,206 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2024-12-02 12:23:31,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-12-02 12:23:31,206 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2024-12-02 12:23:31,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-12-02 12:23:31,207 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:23:31,207 INFO L218 NwaCegarLoop]: trace histogram [3, 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] [2024-12-02 12:23:31,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-12-02 12:23:31,208 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:23:31,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:23:31,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1432152549, now seen corresponding path program 1 times [2024-12-02 12:23:31,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:23:31,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20240508] [2024-12-02 12:23:31,208 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:23:31,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:23:31,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:23:31,379 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-12-02 12:23:31,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:23:31,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20240508] [2024-12-02 12:23:31,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20240508] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:23:31,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:23:31,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 12:23:31,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026457241] [2024-12-02 12:23:31,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:23:31,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 12:23:31,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:23:31,380 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 12:23:31,381 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-12-02 12:23:31,381 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-12-02 12:23:31,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:23:31,449 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2024-12-02 12:23:31,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 12:23:31,449 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2024-12-02 12:23:31,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:23:31,451 INFO L225 Difference]: With dead ends: 69 [2024-12-02 12:23:31,451 INFO L226 Difference]: Without dead ends: 67 [2024-12-02 12:23:31,451 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-12-02 12:23:31,452 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 3 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 12:23:31,452 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 237 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 12:23:31,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-12-02 12:23:31,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-12-02 12:23:31,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 48 states have internal predecessors, (52), 12 states have call successors, (12), 7 states have call predecessors, (12), 9 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2024-12-02 12:23:31,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2024-12-02 12:23:31,464 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 48 [2024-12-02 12:23:31,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:23:31,464 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2024-12-02 12:23:31,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-12-02 12:23:31,464 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2024-12-02 12:23:31,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-12-02 12:23:31,465 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:23:31,465 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:23:31,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-12-02 12:23:31,465 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:23:31,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:23:31,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1836428547, now seen corresponding path program 1 times [2024-12-02 12:23:31,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:23:31,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892078425] [2024-12-02 12:23:31,466 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:23:31,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:23:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:23:32,587 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-12-02 12:23:32,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:23:32,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892078425] [2024-12-02 12:23:32,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892078425] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:23:32,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518784566] [2024-12-02 12:23:32,587 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:23:32,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:23:32,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:23:32,589 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:23:32,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 12:23:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:23:32,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-12-02 12:23:32,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:23:32,734 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 25 treesize of output 17 [2024-12-02 12:23:32,738 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 12:23:32,741 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 12:23:32,744 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 25 treesize of output 17 [2024-12-02 12:23:35,032 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 12:23:35,032 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:23:35,786 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 12:23:35,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518784566] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:23:35,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:23:35,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 13] total 39 [2024-12-02 12:23:35,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985124608] [2024-12-02 12:23:35,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:23:35,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-12-02 12:23:35,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:23:35,787 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-12-02 12:23:35,788 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1339, Unknown=0, NotChecked=0, Total=1482 [2024-12-02 12:23:35,788 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 39 states, 32 states have (on average 2.875) internal successors, (92), 31 states have internal predecessors, (92), 13 states have call successors, (26), 4 states have call predecessors, (26), 9 states have return successors, (24), 11 states have call predecessors, (24), 10 states have call successors, (24) [2024-12-02 12:23:36,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:23:36,768 INFO L93 Difference]: Finished difference Result 81 states and 91 transitions. [2024-12-02 12:23:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-12-02 12:23:36,769 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 32 states have (on average 2.875) internal successors, (92), 31 states have internal predecessors, (92), 13 states have call successors, (26), 4 states have call predecessors, (26), 9 states have return successors, (24), 11 states have call predecessors, (24), 10 states have call successors, (24) Word has length 63 [2024-12-02 12:23:36,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:23:36,770 INFO L225 Difference]: With dead ends: 81 [2024-12-02 12:23:36,770 INFO L226 Difference]: Without dead ends: 79 [2024-12-02 12:23:36,771 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 98 SyntacticMatches, 14 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=236, Invalid=2314, Unknown=0, NotChecked=0, Total=2550 [2024-12-02 12:23:36,771 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 45 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-12-02 12:23:36,771 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 579 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-12-02 12:23:36,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-12-02 12:23:36,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2024-12-02 12:23:36,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.14) internal successors, (57), 54 states have internal predecessors, (57), 13 states have call successors, (13), 8 states have call predecessors, (13), 11 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2024-12-02 12:23:36,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2024-12-02 12:23:36,785 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 63 [2024-12-02 12:23:36,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:23:36,785 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2024-12-02 12:23:36,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 32 states have (on average 2.875) internal successors, (92), 31 states have internal predecessors, (92), 13 states have call successors, (26), 4 states have call predecessors, (26), 9 states have return successors, (24), 11 states have call predecessors, (24), 10 states have call successors, (24) [2024-12-02 12:23:36,785 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2024-12-02 12:23:36,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-12-02 12:23:36,786 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:23:36,786 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:23:36,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 12:23:36,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:23:36,986 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:23:36,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:23:36,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1027081921, now seen corresponding path program 1 times [2024-12-02 12:23:36,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:23:36,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056515007] [2024-12-02 12:23:36,987 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:23:36,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:23:37,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:23:37,142 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-12-02 12:23:37,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:23:37,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056515007] [2024-12-02 12:23:37,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056515007] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:23:37,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:23:37,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-12-02 12:23:37,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860619486] [2024-12-02 12:23:37,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:23:37,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 12:23:37,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:23:37,144 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 12:23:37,144 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-12-02 12:23:37,144 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2024-12-02 12:23:37,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:23:37,286 INFO L93 Difference]: Finished difference Result 102 states and 116 transitions. [2024-12-02 12:23:37,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 12:23:37,286 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 63 [2024-12-02 12:23:37,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:23:37,287 INFO L225 Difference]: With dead ends: 102 [2024-12-02 12:23:37,287 INFO L226 Difference]: Without dead ends: 75 [2024-12-02 12:23:37,287 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-12-02 12:23:37,288 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 12 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:23:37,288 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 194 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 12:23:37,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-12-02 12:23:37,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-12-02 12:23:37,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.12) internal successors, (56), 54 states have internal predecessors, (56), 13 states have call successors, (13), 8 states have call predecessors, (13), 11 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2024-12-02 12:23:37,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2024-12-02 12:23:37,302 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 63 [2024-12-02 12:23:37,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:23:37,303 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2024-12-02 12:23:37,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2024-12-02 12:23:37,303 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2024-12-02 12:23:37,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-12-02 12:23:37,304 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:23:37,304 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:23:37,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-12-02 12:23:37,304 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:23:37,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:23:37,305 INFO L85 PathProgramCache]: Analyzing trace with hash 634054911, now seen corresponding path program 1 times [2024-12-02 12:23:37,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:23:37,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461885054] [2024-12-02 12:23:37,305 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:23:37,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:23:37,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:23:37,480 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 12:23:37,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:23:37,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461885054] [2024-12-02 12:23:37,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461885054] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:23:37,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681206339] [2024-12-02 12:23:37,481 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:23:37,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:23:37,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:23:37,482 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:23:37,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 12:23:37,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:23:37,598 INFO L256 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 12:23:37,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:23:37,663 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-12-02 12:23:37,663 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 12:23:37,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681206339] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:23:37,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 12:23:37,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2024-12-02 12:23:37,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591891953] [2024-12-02 12:23:37,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:23:37,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 12:23:37,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:23:37,664 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 12:23:37,664 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-12-02 12:23:37,664 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2024-12-02 12:23:37,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:23:37,726 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2024-12-02 12:23:37,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 12:23:37,727 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 63 [2024-12-02 12:23:37,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:23:37,727 INFO L225 Difference]: With dead ends: 103 [2024-12-02 12:23:37,728 INFO L226 Difference]: Without dead ends: 66 [2024-12-02 12:23:37,728 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-12-02 12:23:37,728 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 46 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 12:23:37,728 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 157 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 12:23:37,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-12-02 12:23:37,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-12-02 12:23:37,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 46 states have internal predecessors, (48), 12 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2024-12-02 12:23:37,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2024-12-02 12:23:37,740 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 63 [2024-12-02 12:23:37,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:23:37,740 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2024-12-02 12:23:37,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2024-12-02 12:23:37,741 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2024-12-02 12:23:37,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-12-02 12:23:37,741 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:23:37,741 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2024-12-02 12:23:37,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 12:23:37,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:23:37,942 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:23:37,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:23:37,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1007142523, now seen corresponding path program 1 times [2024-12-02 12:23:37,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:23:37,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780416054] [2024-12-02 12:23:37,943 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:23:37,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:23:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:23:39,008 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 12:23:39,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:23:39,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780416054] [2024-12-02 12:23:39,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780416054] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:23:39,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630933349] [2024-12-02 12:23:39,008 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:23:39,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:23:39,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:23:39,010 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:23:39,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 12:23:39,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:23:39,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-12-02 12:23:39,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:23:39,164 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 19 treesize of output 11 [2024-12-02 12:23:39,168 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 12:23:39,172 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 12:23:39,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-12-02 12:23:41,362 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-12-02 12:23:41,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 125 treesize of output 87 [2024-12-02 12:23:41,427 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-12-02 12:23:41,428 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:23:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-12-02 12:23:46,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630933349] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:23:46,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:23:46,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 16] total 48 [2024-12-02 12:23:46,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639288625] [2024-12-02 12:23:46,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:23:46,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-12-02 12:23:46,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:23:46,487 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-12-02 12:23:46,487 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2082, Unknown=1, NotChecked=0, Total=2256 [2024-12-02 12:23:46,487 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand has 48 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 40 states have internal predecessors, (92), 17 states have call successors, (33), 4 states have call predecessors, (33), 9 states have return successors, (30), 16 states have call predecessors, (30), 14 states have call successors, (30) [2024-12-02 12:23:47,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:23:47,699 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2024-12-02 12:23:47,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-12-02 12:23:47,700 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 40 states have internal predecessors, (92), 17 states have call successors, (33), 4 states have call predecessors, (33), 9 states have return successors, (30), 16 states have call predecessors, (30), 14 states have call successors, (30) Word has length 77 [2024-12-02 12:23:47,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:23:47,701 INFO L225 Difference]: With dead ends: 82 [2024-12-02 12:23:47,701 INFO L226 Difference]: Without dead ends: 80 [2024-12-02 12:23:47,702 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 113 SyntacticMatches, 15 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=274, Invalid=3265, Unknown=1, NotChecked=0, Total=3540 [2024-12-02 12:23:47,702 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 29 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-12-02 12:23:47,702 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 564 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-12-02 12:23:47,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-12-02 12:23:47,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2024-12-02 12:23:47,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 52 states have internal predecessors, (53), 13 states have call successors, (13), 9 states have call predecessors, (13), 11 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2024-12-02 12:23:47,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2024-12-02 12:23:47,713 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 77 [2024-12-02 12:23:47,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:23:47,714 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2024-12-02 12:23:47,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 40 states have internal predecessors, (92), 17 states have call successors, (33), 4 states have call predecessors, (33), 9 states have return successors, (30), 16 states have call predecessors, (30), 14 states have call successors, (30) [2024-12-02 12:23:47,714 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2024-12-02 12:23:47,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-12-02 12:23:47,714 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:23:47,714 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:23:47,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 12:23:47,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:23:47,915 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:23:47,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:23:47,915 INFO L85 PathProgramCache]: Analyzing trace with hash 197795897, now seen corresponding path program 1 times [2024-12-02 12:23:47,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:23:47,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981106497] [2024-12-02 12:23:47,915 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:23:47,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:23:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:23:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 27 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-12-02 12:23:48,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:23:48,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981106497] [2024-12-02 12:23:48,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981106497] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:23:48,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906623165] [2024-12-02 12:23:48,756 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:23:48,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:23:48,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:23:48,758 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:23:48,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 12:23:48,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:23:48,885 INFO L256 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-12-02 12:23:48,888 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:23:48,911 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 12:23:48,914 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 12:23:48,918 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 12:23:49,230 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 19 treesize of output 11 [2024-12-02 12:23:49,233 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 7 treesize of output 3 [2024-12-02 12:23:50,260 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-12-02 12:23:50,260 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:23:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-12-02 12:23:50,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906623165] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 12:23:50,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 12:23:50,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [23, 12] total 43 [2024-12-02 12:23:50,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189520792] [2024-12-02 12:23:50,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:23:50,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 12:23:50,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:23:50,636 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 12:23:50,637 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1674, Unknown=0, NotChecked=0, Total=1806 [2024-12-02 12:23:50,637 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2024-12-02 12:23:51,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:23:51,015 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2024-12-02 12:23:51,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 12:23:51,016 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 77 [2024-12-02 12:23:51,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:23:51,016 INFO L225 Difference]: With dead ends: 86 [2024-12-02 12:23:51,016 INFO L226 Difference]: Without dead ends: 74 [2024-12-02 12:23:51,017 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 121 SyntacticMatches, 17 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=183, Invalid=2469, Unknown=0, NotChecked=0, Total=2652 [2024-12-02 12:23:51,017 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 54 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 12:23:51,017 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 182 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 12:23:51,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-12-02 12:23:51,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-12-02 12:23:51,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 52 states have internal predecessors, (52), 13 states have call successors, (13), 9 states have call predecessors, (13), 11 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2024-12-02 12:23:51,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2024-12-02 12:23:51,028 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 77 [2024-12-02 12:23:51,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:23:51,029 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2024-12-02 12:23:51,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2024-12-02 12:23:51,029 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2024-12-02 12:23:51,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-12-02 12:23:51,029 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:23:51,029 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:23:51,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 12:23:51,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:23:51,230 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:23:51,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:23:51,230 INFO L85 PathProgramCache]: Analyzing trace with hash -195231113, now seen corresponding path program 1 times [2024-12-02 12:23:51,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:23:51,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031615999] [2024-12-02 12:23:51,230 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:23:51,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:23:51,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:23:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-12-02 12:23:51,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:23:51,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031615999] [2024-12-02 12:23:51,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031615999] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:23:51,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:23:51,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-12-02 12:23:51,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852918371] [2024-12-02 12:23:51,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:23:51,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 12:23:51,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:23:51,400 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 12:23:51,400 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-12-02 12:23:51,401 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2024-12-02 12:23:51,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:23:51,483 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2024-12-02 12:23:51,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 12:23:51,483 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 77 [2024-12-02 12:23:51,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:23:51,484 INFO L225 Difference]: With dead ends: 87 [2024-12-02 12:23:51,484 INFO L226 Difference]: Without dead ends: 63 [2024-12-02 12:23:51,484 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-12-02 12:23:51,485 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 5 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:23:51,485 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 312 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 12:23:51,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-12-02 12:23:51,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-12-02 12:23:51,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.0) internal successors, (42), 42 states have internal predecessors, (42), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-12-02 12:23:51,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2024-12-02 12:23:51,495 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 77 [2024-12-02 12:23:51,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:23:51,495 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2024-12-02 12:23:51,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2024-12-02 12:23:51,495 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2024-12-02 12:23:51,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-12-02 12:23:51,496 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:23:51,496 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:23:51,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-12-02 12:23:51,496 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:23:51,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:23:51,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1385380010, now seen corresponding path program 1 times [2024-12-02 12:23:51,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:23:51,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932684697] [2024-12-02 12:23:51,496 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:23:51,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:23:51,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:23:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-12-02 12:23:51,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:23:51,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932684697] [2024-12-02 12:23:51,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932684697] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:23:51,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:23:51,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-12-02 12:23:51,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155771975] [2024-12-02 12:23:51,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:23:51,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 12:23:51,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:23:51,837 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 12:23:51,837 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-12-02 12:23:51,838 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-12-02 12:23:51,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:23:51,968 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2024-12-02 12:23:51,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 12:23:51,968 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 83 [2024-12-02 12:23:51,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:23:51,968 INFO L225 Difference]: With dead ends: 63 [2024-12-02 12:23:51,968 INFO L226 Difference]: Without dead ends: 0 [2024-12-02 12:23:51,969 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-12-02 12:23:51,969 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 3 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:23:51,970 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 285 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 12:23:51,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-12-02 12:23:51,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-12-02 12:23:51,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:23:51,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-12-02 12:23:51,970 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 83 [2024-12-02 12:23:51,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:23:51,971 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-12-02 12:23:51,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-12-02 12:23:51,971 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-12-02 12:23:51,971 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-12-02 12:23:51,973 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-12-02 12:23:51,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-12-02 12:23:51,977 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:23:51,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-12-02 12:23:54,459 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-12-02 12:23:54,463 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 12:23:54 BoogieIcfgContainer [2024-12-02 12:23:54,463 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-12-02 12:23:54,463 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-12-02 12:23:54,463 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-12-02 12:23:54,463 INFO L274 PluginConnector]: Witness Printer initialized [2024-12-02 12:23:54,464 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:23:18" (3/4) ... [2024-12-02 12:23:54,465 INFO L146 WitnessPrinter]: Generating witness for correct program [2024-12-02 12:23:54,469 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure aws_linked_list_node_next_is_valid [2024-12-02 12:23:54,469 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure aws_linked_list_node_prev_is_valid [2024-12-02 12:23:54,469 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2024-12-02 12:23:54,469 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-12-02 12:23:54,471 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2024-12-02 12:23:54,471 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-12-02 12:23:54,472 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2024-12-02 12:23:54,472 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-12-02 12:23:54,532 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/witness.graphml [2024-12-02 12:23:54,533 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/witness.yml [2024-12-02 12:23:54,533 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-12-02 12:23:54,533 INFO L158 Benchmark]: Toolchain (without parser) took 38485.32ms. Allocated memory was 142.6MB in the beginning and 318.8MB in the end (delta: 176.2MB). Free memory was 110.3MB in the beginning and 265.4MB in the end (delta: -155.1MB). Peak memory consumption was 18.7MB. Max. memory is 16.1GB. [2024-12-02 12:23:54,533 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 142.6MB. Free memory is still 83.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 12:23:54,534 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1589.67ms. Allocated memory is still 142.6MB. Free memory was 110.1MB in the beginning and 93.6MB in the end (delta: 16.6MB). Peak memory consumption was 83.8MB. Max. memory is 16.1GB. [2024-12-02 12:23:54,534 INFO L158 Benchmark]: Boogie Procedure Inliner took 73.44ms. Allocated memory is still 142.6MB. Free memory was 93.6MB in the beginning and 88.7MB in the end (delta: 4.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-12-02 12:23:54,534 INFO L158 Benchmark]: Boogie Preprocessor took 46.61ms. Allocated memory is still 142.6MB. Free memory was 88.7MB in the beginning and 85.7MB in the end (delta: 3.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 12:23:54,534 INFO L158 Benchmark]: RCFGBuilder took 388.30ms. Allocated memory is still 142.6MB. Free memory was 85.7MB in the beginning and 66.1MB in the end (delta: 19.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-12-02 12:23:54,534 INFO L158 Benchmark]: TraceAbstraction took 36312.69ms. Allocated memory was 142.6MB in the beginning and 318.8MB in the end (delta: 176.2MB). Free memory was 65.2MB in the beginning and 270.2MB in the end (delta: -205.0MB). Peak memory consumption was 143.9MB. Max. memory is 16.1GB. [2024-12-02 12:23:54,535 INFO L158 Benchmark]: Witness Printer took 69.63ms. Allocated memory is still 318.8MB. Free memory was 270.2MB in the beginning and 265.4MB in the end (delta: 4.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-12-02 12:23:54,536 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 142.6MB. Free memory is still 83.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1589.67ms. Allocated memory is still 142.6MB. Free memory was 110.1MB in the beginning and 93.6MB in the end (delta: 16.6MB). Peak memory consumption was 83.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 73.44ms. Allocated memory is still 142.6MB. Free memory was 93.6MB in the beginning and 88.7MB in the end (delta: 4.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 46.61ms. Allocated memory is still 142.6MB. Free memory was 88.7MB in the beginning and 85.7MB in the end (delta: 3.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 388.30ms. Allocated memory is still 142.6MB. Free memory was 85.7MB in the beginning and 66.1MB in the end (delta: 19.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 36312.69ms. Allocated memory was 142.6MB in the beginning and 318.8MB in the end (delta: 176.2MB). Free memory was 65.2MB in the beginning and 270.2MB in the end (delta: -205.0MB). Peak memory consumption was 143.9MB. Max. memory is 16.1GB. * Witness Printer took 69.63ms. Allocated memory is still 318.8MB. Free memory was 270.2MB in the beginning and 265.4MB in the end (delta: 4.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 223]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 33.8s, OverallIterations: 15, TraceHistogramMax: 6, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 414 SdHoareTripleChecker+Valid, 2.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 382 mSDsluCounter, 4027 SdHoareTripleChecker+Invalid, 2.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3318 mSDsCounter, 159 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3154 IncrementalHoareTripleChecker+Invalid, 3313 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 159 mSolverCounterUnsat, 709 mSDtfsCounter, 3154 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 969 GetRequests, 576 SyntacticMatches, 62 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3108 ImplicationChecksByTransitivity, 16.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=9, InterpolantAutomatonStates: 150, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 24 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 25.6s InterpolantComputationTime, 1209 NumberOfCodeBlocks, 1209 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 1482 ConstructedInterpolants, 252 QuantifiedInterpolants, 18734 SizeOfPredicates, 94 NumberOfNonLiveVariables, 2158 ConjunctsInSsa, 399 ConjunctsInUnsatCore, 28 InterpolantComputations, 13 PerfectInterpolantSequences, 740/852 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-12-02 12:23:54,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcffa891-5b3a-425c-8194-cd28371ad79d/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE