./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_vararg_ground.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_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/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_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_vararg_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/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_25db6701-cc99-44c9-9cea-e54f46b335bf/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 28ac72543f751666908cbd68a77fa11ffe4dd886016c3996df45b97bb42d5078 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:09:50,908 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:09:50,983 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:09:50,990 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:09:50,990 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:09:51,027 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:09:51,028 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:09:51,028 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:09:51,029 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:09:51,030 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:09:51,030 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:09:51,031 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:09:51,032 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:09:51,032 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:09:51,033 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:09:51,033 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:09:51,034 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:09:51,034 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:09:51,035 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:09:51,036 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:09:51,036 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:09:51,037 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:09:51,037 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:09:51,038 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:09:51,038 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:09:51,039 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:09:51,039 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:09:51,048 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:09:51,048 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:09:51,048 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:09:51,049 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:09:51,049 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:09:51,050 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:09:51,050 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:09:51,050 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:09:51,050 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:09:51,051 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:09:51,051 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:09:51,051 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:09:51,051 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:09:51,051 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:09:51,052 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:09:51,052 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_25db6701-cc99-44c9-9cea-e54f46b335bf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 28ac72543f751666908cbd68a77fa11ffe4dd886016c3996df45b97bb42d5078 [2023-11-29 05:09:51,334 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:09:51,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:09:51,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:09:51,366 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:09:51,366 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:09:51,368 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-examples/standard_vararg_ground.i [2023-11-29 05:09:54,292 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:09:54,490 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:09:54,490 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/sv-benchmarks/c/array-examples/standard_vararg_ground.i [2023-11-29 05:09:54,498 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/data/6ed5ae80f/1195975aee8b466095d79c28b5867d75/FLAG39936559c [2023-11-29 05:09:54,513 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/data/6ed5ae80f/1195975aee8b466095d79c28b5867d75 [2023-11-29 05:09:54,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:09:54,518 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:09:54,519 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:09:54,519 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:09:54,525 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:09:54,526 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:09:54" (1/1) ... [2023-11-29 05:09:54,527 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10649401 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:54, skipping insertion in model container [2023-11-29 05:09:54,527 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:09:54" (1/1) ... [2023-11-29 05:09:54,554 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:09:54,685 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_25db6701-cc99-44c9-9cea-e54f46b335bf/sv-benchmarks/c/array-examples/standard_vararg_ground.i[815,828] [2023-11-29 05:09:54,699 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:09:54,708 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:09:54,719 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_25db6701-cc99-44c9-9cea-e54f46b335bf/sv-benchmarks/c/array-examples/standard_vararg_ground.i[815,828] [2023-11-29 05:09:54,725 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:09:54,738 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:09:54,738 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:54 WrapperNode [2023-11-29 05:09:54,739 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:09:54,740 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:09:54,740 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:09:54,740 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:09:54,746 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:54" (1/1) ... [2023-11-29 05:09:54,753 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:54" (1/1) ... [2023-11-29 05:09:54,770 INFO L138 Inliner]: procedures = 16, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56 [2023-11-29 05:09:54,770 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:09:54,771 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:09:54,771 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:09:54,771 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:09:54,780 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:54" (1/1) ... [2023-11-29 05:09:54,781 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:54" (1/1) ... [2023-11-29 05:09:54,783 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:54" (1/1) ... [2023-11-29 05:09:54,795 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2023-11-29 05:09:54,795 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:54" (1/1) ... [2023-11-29 05:09:54,796 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:54" (1/1) ... [2023-11-29 05:09:54,801 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:54" (1/1) ... [2023-11-29 05:09:54,805 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:54" (1/1) ... [2023-11-29 05:09:54,806 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:54" (1/1) ... [2023-11-29 05:09:54,808 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:54" (1/1) ... [2023-11-29 05:09:54,810 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:09:54,812 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:09:54,812 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:09:54,812 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:09:54,813 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:54" (1/1) ... [2023-11-29 05:09:54,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:09:54,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:09:54,845 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:09:54,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:09:54,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:09:54,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:09:54,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 05:09:54,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 05:09:54,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 05:09:54,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 05:09:54,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:09:54,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:09:54,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 05:09:54,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 05:09:54,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:09:54,969 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:09:54,971 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:09:55,121 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:09:55,158 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:09:55,159 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 05:09:55,159 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:09:55 BoogieIcfgContainer [2023-11-29 05:09:55,159 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:09:55,162 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:09:55,162 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:09:55,166 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:09:55,167 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:09:54" (1/3) ... [2023-11-29 05:09:55,167 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a3e2380 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:09:55, skipping insertion in model container [2023-11-29 05:09:55,168 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:54" (2/3) ... [2023-11-29 05:09:55,168 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a3e2380 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:09:55, skipping insertion in model container [2023-11-29 05:09:55,168 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:09:55" (3/3) ... [2023-11-29 05:09:55,170 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_vararg_ground.i [2023-11-29 05:09:55,192 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:09:55,192 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:09:55,237 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:09:55,244 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;@5681e34b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:09:55,244 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 05:09:55,248 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:55,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 05:09:55,255 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:09:55,256 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:55,257 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:09:55,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:55,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1229058916, now seen corresponding path program 1 times [2023-11-29 05:09:55,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:09:55,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55951129] [2023-11-29 05:09:55,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:55,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:09:55,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:55,477 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 05:09:55,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:09:55,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55951129] [2023-11-29 05:09:55,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55951129] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:09:55,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:09:55,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:09:55,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756989381] [2023-11-29 05:09:55,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:09:55,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:09:55,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:09:55,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:09:55,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:09:55,523 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:55,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:09:55,555 INFO L93 Difference]: Finished difference Result 25 states and 37 transitions. [2023-11-29 05:09:55,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:09:55,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-29 05:09:55,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:09:55,565 INFO L225 Difference]: With dead ends: 25 [2023-11-29 05:09:55,565 INFO L226 Difference]: Without dead ends: 12 [2023-11-29 05:09:55,568 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 05:09:55,572 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:09:55,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:09:55,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-29 05:09:55,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-11-29 05:09:55,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:55,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2023-11-29 05:09:55,604 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 8 [2023-11-29 05:09:55,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:09:55,604 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2023-11-29 05:09:55,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:55,604 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2023-11-29 05:09:55,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 05:09:55,605 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:09:55,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:55,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:09:55,606 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:09:55,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:55,606 INFO L85 PathProgramCache]: Analyzing trace with hash -389840072, now seen corresponding path program 1 times [2023-11-29 05:09:55,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:09:55,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644019669] [2023-11-29 05:09:55,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:55,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:09:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:55,697 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 05:09:55,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:09:55,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644019669] [2023-11-29 05:09:55,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644019669] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:09:55,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027522544] [2023-11-29 05:09:55,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:55,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:09:55,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:09:55,704 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:09:55,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:09:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:55,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 05:09:55,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:55,852 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 05:09:55,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:09:55,880 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 05:09:55,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027522544] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:09:55,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:09:55,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-29 05:09:55,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119788589] [2023-11-29 05:09:55,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:09:55,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:09:55,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:09:55,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:09:55,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:09:55,886 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:55,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:09:55,915 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2023-11-29 05:09:55,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:09:55,916 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-29 05:09:55,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:09:55,917 INFO L225 Difference]: With dead ends: 24 [2023-11-29 05:09:55,917 INFO L226 Difference]: Without dead ends: 15 [2023-11-29 05:09:55,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:09:55,919 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:09:55,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:09:55,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-29 05:09:55,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-29 05:09:55,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:55,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-11-29 05:09:55,925 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2023-11-29 05:09:55,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:09:55,926 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-11-29 05:09:55,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:55,926 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-11-29 05:09:55,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-29 05:09:55,927 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:09:55,927 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:55,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:09:56,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:09:56,133 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:09:56,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:56,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1716845487, now seen corresponding path program 2 times [2023-11-29 05:09:56,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:09:56,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001256450] [2023-11-29 05:09:56,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:56,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:09:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:56,274 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 05:09:56,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:09:56,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001256450] [2023-11-29 05:09:56,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001256450] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:09:56,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:09:56,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:09:56,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545026588] [2023-11-29 05:09:56,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:09:56,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:09:56,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:09:56,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:09:56,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:09:56,278 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:56,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:09:56,300 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2023-11-29 05:09:56,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:09:56,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-29 05:09:56,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:09:56,301 INFO L225 Difference]: With dead ends: 24 [2023-11-29 05:09:56,301 INFO L226 Difference]: Without dead ends: 17 [2023-11-29 05:09:56,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 05:09:56,304 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:09:56,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:09:56,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-29 05:09:56,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-29 05:09:56,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:56,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-11-29 05:09:56,310 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2023-11-29 05:09:56,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:09:56,311 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-11-29 05:09:56,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:56,311 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-11-29 05:09:56,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-29 05:09:56,312 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:09:56,312 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:56,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 05:09:56,312 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:09:56,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:56,313 INFO L85 PathProgramCache]: Analyzing trace with hash 2125155860, now seen corresponding path program 1 times [2023-11-29 05:09:56,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:09:56,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412363228] [2023-11-29 05:09:56,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:56,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:09:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:56,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:09:56,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:09:56,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412363228] [2023-11-29 05:09:56,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412363228] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:09:56,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456513383] [2023-11-29 05:09:56,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:56,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:09:56,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:09:56,464 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:09:56,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:09:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:56,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:09:56,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:56,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:09:56,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:09:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:09:56,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456513383] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:09:56,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:09:56,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-29 05:09:56,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882772611] [2023-11-29 05:09:56,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:09:56,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:09:56,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:09:56,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:09:56,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:09:56,671 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:56,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:09:56,705 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2023-11-29 05:09:56,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 05:09:56,705 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-29 05:09:56,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:09:56,706 INFO L225 Difference]: With dead ends: 34 [2023-11-29 05:09:56,706 INFO L226 Difference]: Without dead ends: 23 [2023-11-29 05:09:56,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:09:56,708 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:09:56,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:09:56,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-29 05:09:56,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-29 05:09:56,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:56,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-11-29 05:09:56,716 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2023-11-29 05:09:56,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:09:56,716 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-11-29 05:09:56,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:56,717 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-11-29 05:09:56,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-29 05:09:56,718 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:09:56,718 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:56,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:09:56,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:09:56,920 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:09:56,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:56,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1061250700, now seen corresponding path program 2 times [2023-11-29 05:09:56,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:09:56,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370145190] [2023-11-29 05:09:56,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:56,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:09:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:09:57,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:09:57,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370145190] [2023-11-29 05:09:57,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370145190] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:09:57,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557151340] [2023-11-29 05:09:57,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:09:57,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:09:57,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:09:57,206 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:09:57,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:09:57,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:09:57,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:09:57,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 05:09:57,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:57,342 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:09:57,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:09:57,607 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:09:57,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557151340] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:09:57,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:09:57,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-11-29 05:09:57,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094059144] [2023-11-29 05:09:57,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:09:57,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 05:09:57,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:09:57,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 05:09:57,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-11-29 05:09:57,611 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:57,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:09:57,657 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2023-11-29 05:09:57,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 05:09:57,658 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-29 05:09:57,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:09:57,659 INFO L225 Difference]: With dead ends: 46 [2023-11-29 05:09:57,659 INFO L226 Difference]: Without dead ends: 35 [2023-11-29 05:09:57,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-11-29 05:09:57,661 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:09:57,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:09:57,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-29 05:09:57,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-29 05:09:57,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:57,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2023-11-29 05:09:57,670 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 21 [2023-11-29 05:09:57,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:09:57,670 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2023-11-29 05:09:57,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:57,671 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2023-11-29 05:09:57,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-29 05:09:57,672 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:09:57,672 INFO L195 NwaCegarLoop]: trace histogram [22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:57,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 05:09:57,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:09:57,876 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:09:57,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:57,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1008658380, now seen corresponding path program 3 times [2023-11-29 05:09:57,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:09:57,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10066375] [2023-11-29 05:09:57,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:57,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:09:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:58,490 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:09:58,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:09:58,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10066375] [2023-11-29 05:09:58,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10066375] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:09:58,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360873210] [2023-11-29 05:09:58,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:09:58,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:09:58,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:09:58,492 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:09:58,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:09:58,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 05:09:58,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:09:58,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 05:09:58,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:58,875 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 05:09:58,898 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-11-29 05:09:58,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:09:59,039 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 05:09:59,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 12 [2023-11-29 05:09:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-11-29 05:09:59,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360873210] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:09:59,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:09:59,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 6, 6] total 34 [2023-11-29 05:09:59,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002432818] [2023-11-29 05:09:59,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:09:59,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 05:09:59,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:09:59,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 05:09:59,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=860, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 05:09:59,118 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:59,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:09:59,847 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2023-11-29 05:09:59,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 05:09:59,848 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-11-29 05:09:59,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:09:59,849 INFO L225 Difference]: With dead ends: 50 [2023-11-29 05:09:59,849 INFO L226 Difference]: Without dead ends: 39 [2023-11-29 05:09:59,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=973, Invalid=2687, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 05:09:59,852 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:09:59,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 71 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:09:59,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-29 05:09:59,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2023-11-29 05:09:59,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:59,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2023-11-29 05:09:59,862 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 33 [2023-11-29 05:09:59,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:09:59,862 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2023-11-29 05:09:59,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:59,863 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2023-11-29 05:09:59,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 05:09:59,864 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:09:59,864 INFO L195 NwaCegarLoop]: trace histogram [23, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:59,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:10:00,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:00,068 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:00,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:00,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1839607869, now seen corresponding path program 1 times [2023-11-29 05:10:00,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:00,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116667863] [2023-11-29 05:10:00,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:00,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:00,681 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:10:00,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:00,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116667863] [2023-11-29 05:10:00,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116667863] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:00,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270642812] [2023-11-29 05:10:00,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:00,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:00,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:00,684 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:00,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:10:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:00,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 05:10:00,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:10:00,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:01,646 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:10:01,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270642812] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:10:01,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:10:01,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-11-29 05:10:01,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061554788] [2023-11-29 05:10:01,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:10:01,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-29 05:10:01,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:01,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-29 05:10:01,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 05:10:01,652 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 50 states, 50 states have (on average 1.2) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:01,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:01,755 INFO L93 Difference]: Finished difference Result 76 states and 104 transitions. [2023-11-29 05:10:01,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-29 05:10:01,755 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.2) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-29 05:10:01,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:01,757 INFO L225 Difference]: With dead ends: 76 [2023-11-29 05:10:01,757 INFO L226 Difference]: Without dead ends: 63 [2023-11-29 05:10:01,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 05:10:01,760 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:01,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:10:01,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-29 05:10:01,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-11-29 05:10:01,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:01,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2023-11-29 05:10:01,773 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 37 [2023-11-29 05:10:01,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:01,773 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2023-11-29 05:10:01,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.2) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:01,774 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2023-11-29 05:10:01,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-29 05:10:01,776 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:01,776 INFO L195 NwaCegarLoop]: trace histogram [48, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:01,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:10:01,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:01,983 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:01,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:01,984 INFO L85 PathProgramCache]: Analyzing trace with hash 815275270, now seen corresponding path program 2 times [2023-11-29 05:10:01,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:01,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284322096] [2023-11-29 05:10:01,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:01,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:04,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:10:04,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:04,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284322096] [2023-11-29 05:10:04,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284322096] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:04,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261483371] [2023-11-29 05:10:04,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:10:04,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:04,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:04,039 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:04,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:10:04,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:10:04,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:10:04,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-29 05:10:04,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:10:04,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:07,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:10:07,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261483371] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:10:07,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:10:07,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2023-11-29 05:10:07,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720573333] [2023-11-29 05:10:07,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:10:07,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2023-11-29 05:10:07,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:07,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2023-11-29 05:10:07,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2023-11-29 05:10:07,009 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 100 states, 100 states have (on average 1.1) internal successors, (110), 99 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:07,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:07,207 INFO L93 Difference]: Finished difference Result 126 states and 179 transitions. [2023-11-29 05:10:07,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-11-29 05:10:07,207 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.1) internal successors, (110), 99 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2023-11-29 05:10:07,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:07,209 INFO L225 Difference]: With dead ends: 126 [2023-11-29 05:10:07,209 INFO L226 Difference]: Without dead ends: 113 [2023-11-29 05:10:07,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2023-11-29 05:10:07,214 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:07,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:10:07,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-29 05:10:07,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2023-11-29 05:10:07,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0267857142857142) internal successors, (115), 112 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:07,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2023-11-29 05:10:07,232 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 62 [2023-11-29 05:10:07,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:07,233 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2023-11-29 05:10:07,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.1) internal successors, (110), 99 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:07,233 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2023-11-29 05:10:07,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-29 05:10:07,238 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:07,238 INFO L195 NwaCegarLoop]: trace histogram [98, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:07,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 05:10:07,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 05:10:07,440 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:07,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:07,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1197685990, now seen corresponding path program 3 times [2023-11-29 05:10:07,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:07,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936754733] [2023-11-29 05:10:07,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:07,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:12,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4855 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:10:12,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:12,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936754733] [2023-11-29 05:10:12,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936754733] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:12,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208072945] [2023-11-29 05:10:12,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:10:12,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:12,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:12,909 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:12,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:10:13,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 05:10:13,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:10:13,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:10:13,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:13,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4855 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2023-11-29 05:10:13,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:13,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4855 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2023-11-29 05:10:13,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208072945] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:10:13,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:10:13,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 5, 5] total 106 [2023-11-29 05:10:13,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052154880] [2023-11-29 05:10:13,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:10:13,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2023-11-29 05:10:13,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:13,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2023-11-29 05:10:13,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6272, Unknown=0, NotChecked=0, Total=11342 [2023-11-29 05:10:13,746 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand has 107 states, 107 states have (on average 1.1962616822429906) internal successors, (128), 106 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:17,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:17,669 INFO L93 Difference]: Finished difference Result 134 states and 139 transitions. [2023-11-29 05:10:17,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-11-29 05:10:17,670 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.1962616822429906) internal successors, (128), 106 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2023-11-29 05:10:17,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:17,671 INFO L225 Difference]: With dead ends: 134 [2023-11-29 05:10:17,671 INFO L226 Difference]: Without dead ends: 116 [2023-11-29 05:10:17,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5746 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=15267, Invalid=26963, Unknown=0, NotChecked=0, Total=42230 [2023-11-29 05:10:17,680 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:17,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:10:17,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-11-29 05:10:17,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2023-11-29 05:10:17,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0260869565217392) internal successors, (118), 115 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:17,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2023-11-29 05:10:17,696 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 112 [2023-11-29 05:10:17,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:17,696 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2023-11-29 05:10:17,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.1962616822429906) internal successors, (128), 106 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:17,697 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2023-11-29 05:10:17,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-29 05:10:17,698 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:17,699 INFO L195 NwaCegarLoop]: trace histogram [99, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:17,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 05:10:17,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 05:10:17,899 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:17,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:17,900 INFO L85 PathProgramCache]: Analyzing trace with hash 2082915832, now seen corresponding path program 4 times [2023-11-29 05:10:17,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:17,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502977758] [2023-11-29 05:10:17,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:17,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4958 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 05:10:23,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:23,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502977758] [2023-11-29 05:10:23,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502977758] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:23,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631418461] [2023-11-29 05:10:23,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:10:23,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:23,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:23,105 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:23,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:10:23,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:10:23,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:10:23,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 101 conjunts are in the unsatisfiable core [2023-11-29 05:10:23,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:23,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4958 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 05:10:23,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:33,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4958 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 05:10:33,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631418461] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:10:33,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:10:33,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 201 [2023-11-29 05:10:33,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858827019] [2023-11-29 05:10:33,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:10:33,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 202 states [2023-11-29 05:10:33,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:33,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2023-11-29 05:10:33,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20301, Invalid=20301, Unknown=0, NotChecked=0, Total=40602 [2023-11-29 05:10:33,266 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand has 202 states, 202 states have (on average 1.0495049504950495) internal successors, (212), 201 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:33,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:33,794 INFO L93 Difference]: Finished difference Result 232 states and 336 transitions. [2023-11-29 05:10:33,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-11-29 05:10:33,795 INFO L78 Accepts]: Start accepts. Automaton has has 202 states, 202 states have (on average 1.0495049504950495) internal successors, (212), 201 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2023-11-29 05:10:33,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:33,796 INFO L225 Difference]: With dead ends: 232 [2023-11-29 05:10:33,797 INFO L226 Difference]: Without dead ends: 217 [2023-11-29 05:10:33,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=20301, Invalid=20301, Unknown=0, NotChecked=0, Total=40602 [2023-11-29 05:10:33,800 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:33,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:10:33,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-11-29 05:10:33,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2023-11-29 05:10:33,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.0138888888888888) internal successors, (219), 216 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:33,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2023-11-29 05:10:33,829 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 115 [2023-11-29 05:10:33,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:33,830 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2023-11-29 05:10:33,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 202 states, 202 states have (on average 1.0495049504950495) internal successors, (212), 201 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:33,830 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2023-11-29 05:10:33,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2023-11-29 05:10:33,835 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:33,835 INFO L195 NwaCegarLoop]: trace histogram [200, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:33,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 05:10:34,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 05:10:34,040 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:34,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:34,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1756437569, now seen corresponding path program 5 times [2023-11-29 05:10:34,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:34,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549413531] [2023-11-29 05:10:34,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:34,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:53,658 INFO L134 CoverageAnalysis]: Checked inductivity of 20108 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 05:10:53,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:53,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549413531] [2023-11-29 05:10:53,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549413531] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:53,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661555645] [2023-11-29 05:10:53,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:10:53,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:53,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:53,660 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:53,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25db6701-cc99-44c9-9cea-e54f46b335bf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process