./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 49403db555b72e8190819e443264a1fc2796f8e39e39a8e1b1a8f1697d9e5642 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:56:28,010 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:56:28,076 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 02:56:28,081 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:56:28,081 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:56:28,105 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:56:28,105 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:56:28,106 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:56:28,107 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:56:28,107 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:56:28,108 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:56:28,108 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:56:28,109 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:56:28,109 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:56:28,110 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:56:28,110 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:56:28,111 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:56:28,111 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:56:28,112 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:56:28,112 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:56:28,112 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:56:28,113 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:56:28,113 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:56:28,114 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:56:28,114 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:56:28,114 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:56:28,115 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:56:28,115 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:56:28,116 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:56:28,116 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:56:28,116 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:56:28,117 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:56:28,117 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:56:28,117 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:56:28,117 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:56:28,117 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:56:28,118 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:56:28,118 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:56:28,118 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:56:28,118 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:56:28,118 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:56:28,119 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:56:28,119 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 49403db555b72e8190819e443264a1fc2796f8e39e39a8e1b1a8f1697d9e5642 [2023-11-29 02:56:28,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:56:28,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:56:28,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:56:28,389 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:56:28,389 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:56:28,391 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i [2023-11-29 02:56:31,196 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:56:31,361 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:56:31,362 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i [2023-11-29 02:56:31,369 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/data/c8c37e62a/302cf052fb7e49ecb3ac2dd2d124dd89/FLAG6e4dce843 [2023-11-29 02:56:31,382 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/data/c8c37e62a/302cf052fb7e49ecb3ac2dd2d124dd89 [2023-11-29 02:56:31,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:56:31,385 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:56:31,386 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:56:31,386 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:56:31,391 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:56:31,392 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:56:31" (1/1) ... [2023-11-29 02:56:31,393 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e188774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:56:31, skipping insertion in model container [2023-11-29 02:56:31,393 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:56:31" (1/1) ... [2023-11-29 02:56:31,419 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:56:31,560 WARN L240 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_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i[823,836] [2023-11-29 02:56:31,583 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:56:31,593 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:56:31,604 WARN L240 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_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i[823,836] [2023-11-29 02:56:31,618 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:56:31,632 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:56:31,632 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:56:31 WrapperNode [2023-11-29 02:56:31,633 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:56:31,633 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:56:31,634 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:56:31,634 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:56:31,640 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:56:31" (1/1) ... [2023-11-29 02:56:31,647 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:56:31" (1/1) ... [2023-11-29 02:56:31,674 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 117 [2023-11-29 02:56:31,674 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:56:31,675 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:56:31,675 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:56:31,675 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:56:31,686 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:56:31" (1/1) ... [2023-11-29 02:56:31,687 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:56:31" (1/1) ... [2023-11-29 02:56:31,690 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:56:31" (1/1) ... [2023-11-29 02:56:31,704 INFO L175 MemorySlicer]: Split 15 memory accesses to 2 slices as follows [2, 13]. 87 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2023-11-29 02:56:31,704 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:56:31" (1/1) ... [2023-11-29 02:56:31,704 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:56:31" (1/1) ... [2023-11-29 02:56:31,711 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:56:31" (1/1) ... [2023-11-29 02:56:31,717 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:56:31" (1/1) ... [2023-11-29 02:56:31,719 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:56:31" (1/1) ... [2023-11-29 02:56:31,720 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:56:31" (1/1) ... [2023-11-29 02:56:31,723 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:56:31,724 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:56:31,724 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:56:31,725 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:56:31,726 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:56:31" (1/1) ... [2023-11-29 02:56:31,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:56:31,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:56:31,752 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:56:31,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:56:31,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:56:31,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:56:31,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 02:56:31,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:56:31,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 02:56:31,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 02:56:31,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:56:31,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:56:31,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 02:56:31,800 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 02:56:31,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 02:56:31,800 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 02:56:31,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:56:31,873 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:56:31,875 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:56:32,053 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:56:32,078 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:56:32,078 INFO L309 CfgBuilder]: Removed 8 assume(true) statements. [2023-11-29 02:56:32,078 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:56:32 BoogieIcfgContainer [2023-11-29 02:56:32,079 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:56:32,081 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:56:32,082 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:56:32,085 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:56:32,085 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:56:31" (1/3) ... [2023-11-29 02:56:32,086 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b6fd656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:56:32, skipping insertion in model container [2023-11-29 02:56:32,086 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:56:31" (2/3) ... [2023-11-29 02:56:32,087 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b6fd656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:56:32, skipping insertion in model container [2023-11-29 02:56:32,087 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:56:32" (3/3) ... [2023-11-29 02:56:32,088 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-2.i [2023-11-29 02:56:32,109 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:56:32,109 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:56:32,154 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:56:32,160 INFO L357 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, mHoare=true, 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;@25c4ea0e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:56:32,160 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 02:56:32,164 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 28 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 02:56:32,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 02:56:32,171 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:56:32,172 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:56:32,173 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:56:32,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:56:32,178 INFO L85 PathProgramCache]: Analyzing trace with hash 2038256253, now seen corresponding path program 1 times [2023-11-29 02:56:32,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:56:32,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166801864] [2023-11-29 02:56:32,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:32,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:56:32,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:56:32,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:56:32,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166801864] [2023-11-29 02:56:32,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166801864] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:56:32,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:56:32,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:56:32,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748551566] [2023-11-29 02:56:32,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:56:32,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:56:32,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:56:32,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:56:32,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:56:32,428 INFO L87 Difference]: Start difference. First operand has 33 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 28 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:56:32,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:56:32,476 INFO L93 Difference]: Finished difference Result 65 states and 108 transitions. [2023-11-29 02:56:32,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:56:32,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-29 02:56:32,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:56:32,487 INFO L225 Difference]: With dead ends: 65 [2023-11-29 02:56:32,488 INFO L226 Difference]: Without dead ends: 32 [2023-11-29 02:56:32,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:56:32,494 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:56:32,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:56:32,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-29 02:56:32,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-29 02:56:32,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 02:56:32,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2023-11-29 02:56:32,539 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 11 [2023-11-29 02:56:32,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:56:32,540 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2023-11-29 02:56:32,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:56:32,540 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2023-11-29 02:56:32,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-29 02:56:32,541 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:56:32,542 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:56:32,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 02:56:32,542 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:56:32,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:56:32,543 INFO L85 PathProgramCache]: Analyzing trace with hash -929420434, now seen corresponding path program 1 times [2023-11-29 02:56:32,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:56:32,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321152140] [2023-11-29 02:56:32,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:32,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:56:32,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:32,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:56:32,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:56:32,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321152140] [2023-11-29 02:56:32,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321152140] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:56:32,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287196418] [2023-11-29 02:56:32,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:32,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:56:32,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:56:32,653 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:56:32,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:56:32,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:32,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 02:56:32,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:56:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:56:32,744 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:56:32,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287196418] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:56:32,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:56:32,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-29 02:56:32,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231814149] [2023-11-29 02:56:32,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:56:32,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:56:32,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:56:32,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:56:32,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:56:32,749 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:56:32,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:56:32,813 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2023-11-29 02:56:32,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:56:32,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-29 02:56:32,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:56:32,815 INFO L225 Difference]: With dead ends: 60 [2023-11-29 02:56:32,815 INFO L226 Difference]: Without dead ends: 48 [2023-11-29 02:56:32,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:56:32,818 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:56:32,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 51 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:56:32,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-29 02:56:32,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2023-11-29 02:56:32,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 02:56:32,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2023-11-29 02:56:32,829 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 12 [2023-11-29 02:56:32,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:56:32,830 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2023-11-29 02:56:32,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:56:32,830 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2023-11-29 02:56:32,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 02:56:32,831 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:56:32,831 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:56:32,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:56:33,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:56:33,058 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:56:33,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:56:33,059 INFO L85 PathProgramCache]: Analyzing trace with hash -891550513, now seen corresponding path program 1 times [2023-11-29 02:56:33,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:56:33,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123757826] [2023-11-29 02:56:33,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:33,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:56:33,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:33,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:56:33,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:56:33,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123757826] [2023-11-29 02:56:33,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123757826] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:56:33,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222552382] [2023-11-29 02:56:33,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:33,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:56:33,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:56:33,135 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:56:33,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:56:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:33,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 02:56:33,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:56:33,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:56:33,241 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:56:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:56:33,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222552382] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:56:33,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:56:33,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-29 02:56:33,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735934411] [2023-11-29 02:56:33,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:56:33,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:56:33,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:56:33,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:56:33,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:56:33,269 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:56:33,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:56:33,309 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2023-11-29 02:56:33,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:56:33,310 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-29 02:56:33,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:56:33,311 INFO L225 Difference]: With dead ends: 66 [2023-11-29 02:56:33,311 INFO L226 Difference]: Without dead ends: 36 [2023-11-29 02:56:33,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:56:33,313 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:56:33,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 177 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:56:33,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-29 02:56:33,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-29 02:56:33,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 02:56:33,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2023-11-29 02:56:33,322 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 14 [2023-11-29 02:56:33,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:56:33,322 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2023-11-29 02:56:33,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:56:33,323 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2023-11-29 02:56:33,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 02:56:33,324 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:56:33,324 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:56:33,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:56:33,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:56:33,525 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:56:33,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:56:33,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1261296920, now seen corresponding path program 2 times [2023-11-29 02:56:33,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:56:33,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402899703] [2023-11-29 02:56:33,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:33,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:56:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:33,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 02:56:33,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:56:33,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402899703] [2023-11-29 02:56:33,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402899703] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:56:33,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:56:33,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:56:33,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711036321] [2023-11-29 02:56:33,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:56:33,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:56:33,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:56:33,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:56:33,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:56:33,624 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:56:33,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:56:33,694 INFO L93 Difference]: Finished difference Result 82 states and 113 transitions. [2023-11-29 02:56:33,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:56:33,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-29 02:56:33,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:56:33,695 INFO L225 Difference]: With dead ends: 82 [2023-11-29 02:56:33,695 INFO L226 Difference]: Without dead ends: 54 [2023-11-29 02:56:33,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:56:33,697 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 27 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:56:33,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 53 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:56:33,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-29 02:56:33,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2023-11-29 02:56:33,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 02:56:33,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2023-11-29 02:56:33,706 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 17 [2023-11-29 02:56:33,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:56:33,707 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2023-11-29 02:56:33,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:56:33,707 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2023-11-29 02:56:33,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-29 02:56:33,708 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:56:33,708 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:56:33,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 02:56:33,708 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:56:33,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:56:33,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1641264908, now seen corresponding path program 1 times [2023-11-29 02:56:33,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:56:33,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93682006] [2023-11-29 02:56:33,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:33,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:56:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:33,793 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 02:56:33,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:56:33,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93682006] [2023-11-29 02:56:33,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93682006] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:56:33,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:56:33,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:56:33,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857315726] [2023-11-29 02:56:33,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:56:33,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:56:33,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:56:33,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:56:33,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:56:33,796 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:56:33,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:56:33,863 INFO L93 Difference]: Finished difference Result 79 states and 108 transitions. [2023-11-29 02:56:33,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:56:33,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-29 02:56:33,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:56:33,864 INFO L225 Difference]: With dead ends: 79 [2023-11-29 02:56:33,864 INFO L226 Difference]: Without dead ends: 51 [2023-11-29 02:56:33,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:56:33,866 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:56:33,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 72 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:56:33,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-29 02:56:33,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2023-11-29 02:56:33,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.325) internal successors, (53), 40 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 02:56:33,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2023-11-29 02:56:33,875 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 20 [2023-11-29 02:56:33,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:56:33,875 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2023-11-29 02:56:33,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:56:33,875 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2023-11-29 02:56:33,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-29 02:56:33,876 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:56:33,876 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:56:33,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 02:56:33,876 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:56:33,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:56:33,877 INFO L85 PathProgramCache]: Analyzing trace with hash -821471327, now seen corresponding path program 1 times [2023-11-29 02:56:33,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:56:33,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602150453] [2023-11-29 02:56:33,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:33,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:56:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:33,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:56:33,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:56:33,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602150453] [2023-11-29 02:56:33,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602150453] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:56:33,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294294423] [2023-11-29 02:56:33,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:33,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:56:33,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:56:33,986 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:56:33,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:56:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:34,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:56:34,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:56:34,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:56:34,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:56:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:56:34,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294294423] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:56:34,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:56:34,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-29 02:56:34,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421114985] [2023-11-29 02:56:34,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:56:34,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 02:56:34,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:56:34,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 02:56:34,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:56:34,145 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:56:34,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:56:34,183 INFO L93 Difference]: Finished difference Result 90 states and 123 transitions. [2023-11-29 02:56:34,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 02:56:34,184 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-29 02:56:34,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:56:34,185 INFO L225 Difference]: With dead ends: 90 [2023-11-29 02:56:34,185 INFO L226 Difference]: Without dead ends: 51 [2023-11-29 02:56:34,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:56:34,187 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:56:34,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 142 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:56:34,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-29 02:56:34,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-11-29 02:56:34,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 02:56:34,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2023-11-29 02:56:34,196 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 21 [2023-11-29 02:56:34,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:56:34,196 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2023-11-29 02:56:34,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:56:34,196 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2023-11-29 02:56:34,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 02:56:34,197 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:56:34,197 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:56:34,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:56:34,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 02:56:34,401 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:56:34,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:56:34,401 INFO L85 PathProgramCache]: Analyzing trace with hash 844164673, now seen corresponding path program 2 times [2023-11-29 02:56:34,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:56:34,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951177319] [2023-11-29 02:56:34,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:34,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:56:34,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:56:34,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:56:34,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951177319] [2023-11-29 02:56:34,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951177319] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:56:34,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503343444] [2023-11-29 02:56:34,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:56:34,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:56:34,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:56:34,626 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:56:34,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:56:34,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 02:56:34,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:56:34,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 02:56:34,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:56:34,850 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 15 treesize of output 7 [2023-11-29 02:56:34,897 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-29 02:56:34,898 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:56:34,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503343444] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:56:34,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:56:34,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 18 [2023-11-29 02:56:34,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833018397] [2023-11-29 02:56:34,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:56:34,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 02:56:34,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:56:34,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 02:56:34,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2023-11-29 02:56:34,900 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:56:35,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:56:35,055 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2023-11-29 02:56:35,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 02:56:35,056 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-29 02:56:35,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:56:35,057 INFO L225 Difference]: With dead ends: 63 [2023-11-29 02:56:35,057 INFO L226 Difference]: Without dead ends: 61 [2023-11-29 02:56:35,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2023-11-29 02:56:35,059 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 44 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:56:35,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 122 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:56:35,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-29 02:56:35,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2023-11-29 02:56:35,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 50 states have internal predecessors, (62), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 02:56:35,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2023-11-29 02:56:35,070 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 27 [2023-11-29 02:56:35,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:56:35,070 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2023-11-29 02:56:35,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:56:35,070 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2023-11-29 02:56:35,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 02:56:35,072 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:56:35,072 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:56:35,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:56:35,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 02:56:35,278 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:56:35,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:56:35,278 INFO L85 PathProgramCache]: Analyzing trace with hash 925196036, now seen corresponding path program 1 times [2023-11-29 02:56:35,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:56:35,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596320812] [2023-11-29 02:56:35,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:35,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:56:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:35,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-29 02:56:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:56:35,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:56:35,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596320812] [2023-11-29 02:56:35,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596320812] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:56:35,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605942926] [2023-11-29 02:56:35,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:35,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:56:35,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:56:35,498 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:56:35,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:56:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:35,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 02:56:35,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:56:35,626 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:56:35,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:56:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:56:35,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605942926] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:56:35,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:56:35,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2023-11-29 02:56:35,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131445544] [2023-11-29 02:56:35,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:56:35,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 02:56:35,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:56:35,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 02:56:35,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-29 02:56:35,861 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:56:35,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:56:35,918 INFO L93 Difference]: Finished difference Result 112 states and 151 transitions. [2023-11-29 02:56:35,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 02:56:35,919 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2023-11-29 02:56:35,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:56:35,921 INFO L225 Difference]: With dead ends: 112 [2023-11-29 02:56:35,921 INFO L226 Difference]: Without dead ends: 68 [2023-11-29 02:56:35,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-29 02:56:35,922 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:56:35,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 177 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:56:35,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-29 02:56:35,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-11-29 02:56:35,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 62 states have internal predecessors, (74), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 02:56:35,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2023-11-29 02:56:35,935 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 34 [2023-11-29 02:56:35,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:56:35,935 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2023-11-29 02:56:35,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:56:35,935 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2023-11-29 02:56:35,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 02:56:35,937 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:56:35,937 INFO L195 NwaCegarLoop]: trace histogram [22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:56:35,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 02:56:36,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 02:56:36,141 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:56:36,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:56:36,141 INFO L85 PathProgramCache]: Analyzing trace with hash -2011549244, now seen corresponding path program 2 times [2023-11-29 02:56:36,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:56:36,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642578734] [2023-11-29 02:56:36,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:36,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:56:36,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:36,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 02:56:36,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 2 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:56:36,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:56:36,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642578734] [2023-11-29 02:56:36,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642578734] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:56:36,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553720021] [2023-11-29 02:56:36,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:56:36,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:56:36,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:56:36,793 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:56:36,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:56:36,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:56:36,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:56:36,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 02:56:36,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:56:36,981 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:56:36,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:56:37,740 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 2 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:56:37,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553720021] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:56:37,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:56:37,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 25] total 49 [2023-11-29 02:56:37,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352793204] [2023-11-29 02:56:37,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:56:37,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-29 02:56:37,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:56:37,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-29 02:56:37,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 02:56:37,745 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 49 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 49 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:56:37,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:56:37,831 INFO L93 Difference]: Finished difference Result 136 states and 187 transitions. [2023-11-29 02:56:37,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-29 02:56:37,831 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 49 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2023-11-29 02:56:37,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:56:37,833 INFO L225 Difference]: With dead ends: 136 [2023-11-29 02:56:37,833 INFO L226 Difference]: Without dead ends: 92 [2023-11-29 02:56:37,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 02:56:37,835 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:56:37,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 177 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:56:37,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-29 02:56:37,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2023-11-29 02:56:37,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 85 states have (on average 1.1529411764705881) internal successors, (98), 86 states have internal predecessors, (98), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 02:56:37,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2023-11-29 02:56:37,849 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 46 [2023-11-29 02:56:37,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:56:37,849 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2023-11-29 02:56:37,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 49 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:56:37,849 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2023-11-29 02:56:37,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-29 02:56:37,852 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:56:37,852 INFO L195 NwaCegarLoop]: trace histogram [46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:56:37,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 02:56:38,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:56:38,058 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:56:38,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:56:38,059 INFO L85 PathProgramCache]: Analyzing trace with hash -519997628, now seen corresponding path program 3 times [2023-11-29 02:56:38,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:56:38,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992389644] [2023-11-29 02:56:38,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:38,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:56:38,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:39,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-29 02:56:39,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:39,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 2 proven. 1081 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:56:39,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:56:39,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992389644] [2023-11-29 02:56:39,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992389644] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:56:39,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284541135] [2023-11-29 02:56:39,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:56:39,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:56:39,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:56:39,894 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:56:39,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:56:40,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 02:56:40,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:56:40,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 02:56:40,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:56:40,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1085 trivial. 0 not checked. [2023-11-29 02:56:40,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:56:40,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1083 trivial. 0 not checked. [2023-11-29 02:56:40,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284541135] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:56:40,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:56:40,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 4, 4] total 51 [2023-11-29 02:56:40,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544346292] [2023-11-29 02:56:40,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:56:40,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-29 02:56:40,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:56:40,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-29 02:56:40,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 02:56:40,158 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand has 51 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 51 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:56:40,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:56:40,371 INFO L93 Difference]: Finished difference Result 161 states and 201 transitions. [2023-11-29 02:56:40,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-29 02:56:40,371 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 51 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 70 [2023-11-29 02:56:40,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:56:40,373 INFO L225 Difference]: With dead ends: 161 [2023-11-29 02:56:40,373 INFO L226 Difference]: Without dead ends: 117 [2023-11-29 02:56:40,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1184, Invalid=1468, Unknown=0, NotChecked=0, Total=2652 [2023-11-29 02:56:40,375 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 39 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:56:40,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 238 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:56:40,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-29 02:56:40,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 101. [2023-11-29 02:56:40,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 94 states have (on average 1.1808510638297873) internal successors, (111), 95 states have internal predecessors, (111), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 02:56:40,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2023-11-29 02:56:40,389 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 70 [2023-11-29 02:56:40,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:56:40,390 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2023-11-29 02:56:40,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 51 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:56:40,390 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2023-11-29 02:56:40,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-29 02:56:40,391 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:56:40,392 INFO L195 NwaCegarLoop]: trace histogram [47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:56:40,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 02:56:40,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 02:56:40,597 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:56:40,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:56:40,598 INFO L85 PathProgramCache]: Analyzing trace with hash 274341311, now seen corresponding path program 1 times [2023-11-29 02:56:40,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:56:40,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350627616] [2023-11-29 02:56:40,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:40,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:56:40,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:42,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-11-29 02:56:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:42,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 2 proven. 1128 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:56:42,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:56:42,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350627616] [2023-11-29 02:56:42,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350627616] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:56:42,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156063484] [2023-11-29 02:56:42,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:42,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:56:42,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:56:42,389 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:56:42,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 02:56:42,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:42,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-29 02:56:42,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:56:42,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:56:42,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:56:44,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 2 proven. 1128 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:56:44,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156063484] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:56:44,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:56:44,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 50] total 99 [2023-11-29 02:56:44,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742630597] [2023-11-29 02:56:44,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:56:44,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2023-11-29 02:56:44,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:56:44,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2023-11-29 02:56:44,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2023-11-29 02:56:44,929 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand has 99 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 99 states have internal predecessors, (120), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:56:45,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:56:45,087 INFO L93 Difference]: Finished difference Result 202 states and 286 transitions. [2023-11-29 02:56:45,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-11-29 02:56:45,088 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 99 states have internal predecessors, (120), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 71 [2023-11-29 02:56:45,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:56:45,089 INFO L225 Difference]: With dead ends: 202 [2023-11-29 02:56:45,089 INFO L226 Difference]: Without dead ends: 150 [2023-11-29 02:56:45,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2023-11-29 02:56:45,093 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:56:45,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 212 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:56:45,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-11-29 02:56:45,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2023-11-29 02:56:45,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 143 states have (on average 1.118881118881119) internal successors, (160), 144 states have internal predecessors, (160), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 02:56:45,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 168 transitions. [2023-11-29 02:56:45,109 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 168 transitions. Word has length 71 [2023-11-29 02:56:45,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:56:45,109 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 168 transitions. [2023-11-29 02:56:45,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 99 states have internal predecessors, (120), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:56:45,109 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 168 transitions. [2023-11-29 02:56:45,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-29 02:56:45,111 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:56:45,111 INFO L195 NwaCegarLoop]: trace histogram [96, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:56:45,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 02:56:45,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:56:45,317 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:56:45,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:56:45,317 INFO L85 PathProgramCache]: Analyzing trace with hash -614969946, now seen corresponding path program 2 times [2023-11-29 02:56:45,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:56:45,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22635955] [2023-11-29 02:56:45,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:45,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:56:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:50,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-11-29 02:56:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4661 backedges. 2 proven. 4656 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:56:50,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:56:50,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22635955] [2023-11-29 02:56:50,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22635955] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:56:50,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360691692] [2023-11-29 02:56:50,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:56:50,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:56:50,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:56:50,198 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:56:50,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 02:56:50,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:56:50,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:56:50,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 98 conjunts are in the unsatisfiable core [2023-11-29 02:56:50,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:56:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4661 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:56:50,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:56:59,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4661 backedges. 2 proven. 4656 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:56:59,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360691692] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:56:59,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:56:59,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 98, 99] total 197 [2023-11-29 02:56:59,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136086686] [2023-11-29 02:56:59,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:56:59,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2023-11-29 02:56:59,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:56:59,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2023-11-29 02:56:59,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2023-11-29 02:56:59,461 INFO L87 Difference]: Start difference. First operand 150 states and 168 transitions. Second operand has 197 states, 197 states have (on average 1.1065989847715736) internal successors, (218), 197 states have internal predecessors, (218), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:56:59,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:56:59,927 INFO L93 Difference]: Finished difference Result 300 states and 433 transitions. [2023-11-29 02:56:59,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2023-11-29 02:56:59,928 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 197 states have (on average 1.1065989847715736) internal successors, (218), 197 states have internal predecessors, (218), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 120 [2023-11-29 02:56:59,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:56:59,930 INFO L225 Difference]: With dead ends: 300 [2023-11-29 02:56:59,930 INFO L226 Difference]: Without dead ends: 248 [2023-11-29 02:56:59,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2023-11-29 02:56:59,933 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:56:59,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 177 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:56:59,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-11-29 02:56:59,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2023-11-29 02:56:59,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 241 states have (on average 1.070539419087137) internal successors, (258), 242 states have internal predecessors, (258), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 02:56:59,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 266 transitions. [2023-11-29 02:56:59,951 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 266 transitions. Word has length 120 [2023-11-29 02:56:59,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:56:59,951 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 266 transitions. [2023-11-29 02:56:59,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 197 states have (on average 1.1065989847715736) internal successors, (218), 197 states have internal predecessors, (218), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:56:59,952 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 266 transitions. [2023-11-29 02:56:59,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-11-29 02:56:59,953 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:56:59,954 INFO L195 NwaCegarLoop]: trace histogram [194, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:56:59,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 02:57:00,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 02:57:00,154 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:57:00,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:57:00,155 INFO L85 PathProgramCache]: Analyzing trace with hash -546200890, now seen corresponding path program 3 times [2023-11-29 02:57:00,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:57:00,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987624566] [2023-11-29 02:57:00,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:57:00,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:57:00,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:57:18,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2023-11-29 02:57:18,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:57:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 18920 backedges. 2 proven. 18915 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:57:18,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:57:18,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987624566] [2023-11-29 02:57:18,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987624566] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:57:18,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977474484] [2023-11-29 02:57:18,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:57:18,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:57:18,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:57:18,216 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:57:18,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 02:57:18,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 02:57:18,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:57:18,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:57:18,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:57:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 18920 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18919 trivial. 0 not checked. [2023-11-29 02:57:18,693 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:57:18,946 INFO L134 CoverageAnalysis]: Checked inductivity of 18920 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 18917 trivial. 0 not checked. [2023-11-29 02:57:18,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977474484] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:57:18,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:57:18,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [197, 5, 5] total 203 [2023-11-29 02:57:18,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510252306] [2023-11-29 02:57:18,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:57:18,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-11-29 02:57:18,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:57:18,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-11-29 02:57:18,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19325, Invalid=21681, Unknown=0, NotChecked=0, Total=41006 [2023-11-29 02:57:18,954 INFO L87 Difference]: Start difference. First operand 248 states and 266 transitions. Second operand has 203 states, 203 states have (on average 1.1379310344827587) internal successors, (231), 203 states have internal predecessors, (231), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:57:33,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:57:33,076 INFO L93 Difference]: Finished difference Result 348 states and 412 transitions. [2023-11-29 02:57:33,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2023-11-29 02:57:33,077 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.1379310344827587) internal successors, (231), 203 states have internal predecessors, (231), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 218 [2023-11-29 02:57:33,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:57:33,079 INFO L225 Difference]: With dead ends: 348 [2023-11-29 02:57:33,079 INFO L226 Difference]: Without dead ends: 296 [2023-11-29 02:57:33,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 833 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 402 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21463 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=58179, Invalid=104633, Unknown=0, NotChecked=0, Total=162812 [2023-11-29 02:57:33,088 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 487 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:57:33,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 252 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:57:33,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2023-11-29 02:57:33,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 277. [2023-11-29 02:57:33,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 269 states have (on average 1.0892193308550187) internal successors, (293), 270 states have internal predecessors, (293), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 02:57:33,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 303 transitions. [2023-11-29 02:57:33,107 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 303 transitions. Word has length 218 [2023-11-29 02:57:33,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:57:33,107 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 303 transitions. [2023-11-29 02:57:33,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.1379310344827587) internal successors, (231), 203 states have internal predecessors, (231), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:57:33,107 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 303 transitions. [2023-11-29 02:57:33,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2023-11-29 02:57:33,109 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:57:33,109 INFO L195 NwaCegarLoop]: trace histogram [195, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:57:33,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 02:57:33,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:57:33,310 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:57:33,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:57:33,311 INFO L85 PathProgramCache]: Analyzing trace with hash -21559199, now seen corresponding path program 4 times [2023-11-29 02:57:33,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:57:33,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519203836] [2023-11-29 02:57:33,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:57:33,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:57:33,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:57:51,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2023-11-29 02:57:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:57:51,550 INFO L134 CoverageAnalysis]: Checked inductivity of 19136 backedges. 2 proven. 19110 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 02:57:51,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:57:51,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519203836] [2023-11-29 02:57:51,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519203836] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:57:51,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501271526] [2023-11-29 02:57:51,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:57:51,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:57:51,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:57:51,552 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:57:51,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 02:57:52,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:57:52,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:57:52,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 1879 conjuncts, 197 conjunts are in the unsatisfiable core [2023-11-29 02:57:52,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:57:52,352 INFO L134 CoverageAnalysis]: Checked inductivity of 19136 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 02:57:52,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:58:27,318 INFO L134 CoverageAnalysis]: Checked inductivity of 19136 backedges. 2 proven. 19110 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 02:58:27,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501271526] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:58:27,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:58:27,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [198, 197, 198] total 395 [2023-11-29 02:58:27,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137216922] [2023-11-29 02:58:27,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:58:27,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 395 states [2023-11-29 02:58:27,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:58:27,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 395 interpolants. [2023-11-29 02:58:27,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77815, Invalid=77815, Unknown=0, NotChecked=0, Total=155630 [2023-11-29 02:58:27,340 INFO L87 Difference]: Start difference. First operand 277 states and 303 transitions. Second operand has 395 states, 395 states have (on average 1.0531645569620254) internal successors, (416), 395 states have internal predecessors, (416), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:58:29,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:58:29,492 INFO L93 Difference]: Finished difference Result 554 states and 802 transitions. [2023-11-29 02:58:29,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 394 states. [2023-11-29 02:58:29,493 INFO L78 Accepts]: Start accepts. Automaton has has 395 states, 395 states have (on average 1.0531645569620254) internal successors, (416), 395 states have internal predecessors, (416), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 228 [2023-11-29 02:58:29,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:58:29,497 INFO L225 Difference]: With dead ends: 554 [2023-11-29 02:58:29,497 INFO L226 Difference]: Without dead ends: 474 [2023-11-29 02:58:29,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 393 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 46.2s TimeCoverageRelationStatistics Valid=77815, Invalid=77815, Unknown=0, NotChecked=0, Total=155630 [2023-11-29 02:58:29,505 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:58:29,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 317 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:58:29,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2023-11-29 02:58:29,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 474. [2023-11-29 02:58:29,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 466 states have (on average 1.0515021459227467) internal successors, (490), 467 states have internal predecessors, (490), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 02:58:29,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 500 transitions. [2023-11-29 02:58:29,535 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 500 transitions. Word has length 228 [2023-11-29 02:58:29,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:58:29,536 INFO L495 AbstractCegarLoop]: Abstraction has 474 states and 500 transitions. [2023-11-29 02:58:29,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 395 states, 395 states have (on average 1.0531645569620254) internal successors, (416), 395 states have internal predecessors, (416), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:58:29,537 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 500 transitions. [2023-11-29 02:58:29,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2023-11-29 02:58:29,541 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:58:29,541 INFO L195 NwaCegarLoop]: trace histogram [392, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:58:29,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 02:58:29,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 02:58:29,742 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:58:29,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:58:29,742 INFO L85 PathProgramCache]: Analyzing trace with hash -482330982, now seen corresponding path program 5 times [2023-11-29 02:58:29,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:58:29,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806031562] [2023-11-29 02:58:29,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:58:29,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:58:30,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:59:49,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 414 [2023-11-29 02:59:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:59:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 77054 backedges. 2 proven. 77028 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 02:59:49,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:59:49,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806031562] [2023-11-29 02:59:49,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806031562] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:59:49,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658356033] [2023-11-29 02:59:49,178 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:59:49,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:59:49,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:59:49,180 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:59:49,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecaf70ac-99bd-4aaf-90ef-6a4ac1090e7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process