./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label50.c --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_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/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_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/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_3c070ced-b369-4c6c-a483-1fb84f4dc808/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 c0a29c0650858169a7f06788e2d55d3441e7b25ce879ddd70ee1db162c004af4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:47:58,690 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:47:58,750 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:47:58,755 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:47:58,755 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:47:58,777 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:47:58,778 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:47:58,778 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:47:58,779 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:47:58,779 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:47:58,780 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:47:58,780 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:47:58,781 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:47:58,782 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:47:58,782 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:47:58,783 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:47:58,783 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:47:58,784 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:47:58,784 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:47:58,785 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:47:58,785 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:47:58,786 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:47:58,787 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:47:58,787 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:47:58,788 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:47:58,788 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:47:58,789 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:47:58,789 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:47:58,789 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:47:58,790 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:47:58,790 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:47:58,791 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:47:58,791 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:47:58,791 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:47:58,792 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:47:58,792 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:47:58,792 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:47:58,792 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:47:58,792 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:47:58,793 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:47:58,793 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:47:58,793 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:47:58,793 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_3c070ced-b369-4c6c-a483-1fb84f4dc808/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c0a29c0650858169a7f06788e2d55d3441e7b25ce879ddd70ee1db162c004af4 [2023-11-29 06:47:58,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:47:59,011 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:47:59,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:47:59,015 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:47:59,015 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:47:59,017 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/eca-rers2012/Problem13_label50.c [2023-11-29 06:48:01,777 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:48:02,196 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:48:02,197 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/sv-benchmarks/c/eca-rers2012/Problem13_label50.c [2023-11-29 06:48:02,226 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/data/aa2cb4478/21c75d87780c461186340f85f0408a20/FLAGbad61745e [2023-11-29 06:48:02,239 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/data/aa2cb4478/21c75d87780c461186340f85f0408a20 [2023-11-29 06:48:02,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:48:02,243 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:48:02,244 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:48:02,244 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:48:02,248 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:48:02,249 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:48:02" (1/1) ... [2023-11-29 06:48:02,249 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a33b13c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:02, skipping insertion in model container [2023-11-29 06:48:02,250 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:48:02" (1/1) ... [2023-11-29 06:48:02,366 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:48:02,607 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_3c070ced-b369-4c6c-a483-1fb84f4dc808/sv-benchmarks/c/eca-rers2012/Problem13_label50.c[8814,8827] [2023-11-29 06:48:03,435 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:48:03,444 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:48:03,471 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_3c070ced-b369-4c6c-a483-1fb84f4dc808/sv-benchmarks/c/eca-rers2012/Problem13_label50.c[8814,8827] [2023-11-29 06:48:03,981 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:48:04,009 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:48:04,010 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:04 WrapperNode [2023-11-29 06:48:04,010 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:48:04,011 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:48:04,011 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:48:04,011 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:48:04,018 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:04" (1/1) ... [2023-11-29 06:48:04,072 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:04" (1/1) ... [2023-11-29 06:48:04,485 INFO L138 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5584 [2023-11-29 06:48:04,485 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:48:04,486 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:48:04,486 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:48:04,486 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:48:04,495 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:04" (1/1) ... [2023-11-29 06:48:04,495 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:04" (1/1) ... [2023-11-29 06:48:04,550 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:04" (1/1) ... [2023-11-29 06:48:04,778 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 06:48:04,779 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:04" (1/1) ... [2023-11-29 06:48:04,779 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:04" (1/1) ... [2023-11-29 06:48:05,129 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:04" (1/1) ... [2023-11-29 06:48:05,160 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:04" (1/1) ... [2023-11-29 06:48:05,233 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:04" (1/1) ... [2023-11-29 06:48:05,247 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:04" (1/1) ... [2023-11-29 06:48:05,337 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:48:05,337 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:48:05,338 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:48:05,338 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:48:05,338 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:04" (1/1) ... [2023-11-29 06:48:05,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:48:05,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:48:05,363 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:48:05,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:48:05,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:48:05,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:48:05,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:48:05,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:48:05,468 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:48:05,470 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:48:11,325 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:48:11,383 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:48:11,383 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 06:48:11,384 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:48:11 BoogieIcfgContainer [2023-11-29 06:48:11,385 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:48:11,387 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:48:11,387 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:48:11,390 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:48:11,390 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:48:02" (1/3) ... [2023-11-29 06:48:11,390 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55bf7ef0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:48:11, skipping insertion in model container [2023-11-29 06:48:11,390 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:04" (2/3) ... [2023-11-29 06:48:11,391 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55bf7ef0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:48:11, skipping insertion in model container [2023-11-29 06:48:11,391 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:48:11" (3/3) ... [2023-11-29 06:48:11,392 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label50.c [2023-11-29 06:48:11,407 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:48:11,407 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:48:11,475 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:48:11,481 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;@7477b2c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:48:11,481 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 06:48:11,489 INFO L276 IsEmpty]: Start isEmpty. Operand has 1036 states, 1034 states have (on average 1.877176015473888) internal successors, (1941), 1035 states have internal predecessors, (1941), 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 06:48:11,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-29 06:48:11,496 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:48:11,497 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:11,498 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:48:11,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:11,502 INFO L85 PathProgramCache]: Analyzing trace with hash 625072379, now seen corresponding path program 1 times [2023-11-29 06:48:11,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:11,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78377102] [2023-11-29 06:48:11,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:11,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:11,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:11,668 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 06:48:11,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:11,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78377102] [2023-11-29 06:48:11,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78377102] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:48:11,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:48:11,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:48:11,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151526097] [2023-11-29 06:48:11,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:48:11,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 06:48:11,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:11,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 06:48:11,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 06:48:11,705 INFO L87 Difference]: Start difference. First operand has 1036 states, 1034 states have (on average 1.877176015473888) internal successors, (1941), 1035 states have internal predecessors, (1941), 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 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 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 06:48:11,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:48:11,797 INFO L93 Difference]: Finished difference Result 2071 states and 3881 transitions. [2023-11-29 06:48:11,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 06:48:11,799 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 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 61 [2023-11-29 06:48:11,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:48:11,820 INFO L225 Difference]: With dead ends: 2071 [2023-11-29 06:48:11,820 INFO L226 Difference]: Without dead ends: 1034 [2023-11-29 06:48:11,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 06:48:11,830 INFO L413 NwaCegarLoop]: 1876 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1876 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:48:11,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1876 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:48:11,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2023-11-29 06:48:11,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 1034. [2023-11-29 06:48:11,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 1.8160696999031947) internal successors, (1876), 1033 states have internal predecessors, (1876), 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 06:48:11,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1876 transitions. [2023-11-29 06:48:11,912 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1876 transitions. Word has length 61 [2023-11-29 06:48:11,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:48:11,912 INFO L495 AbstractCegarLoop]: Abstraction has 1034 states and 1876 transitions. [2023-11-29 06:48:11,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 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 06:48:11,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1876 transitions. [2023-11-29 06:48:11,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-29 06:48:11,915 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:48:11,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:11,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:48:11,916 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:48:11,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:11,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1785996915, now seen corresponding path program 1 times [2023-11-29 06:48:11,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:11,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043888472] [2023-11-29 06:48:11,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:11,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:11,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:12,284 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 06:48:12,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:12,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043888472] [2023-11-29 06:48:12,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043888472] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:48:12,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:48:12,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:48:12,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349652479] [2023-11-29 06:48:12,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:48:12,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:48:12,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:12,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:48:12,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:48:12,288 INFO L87 Difference]: Start difference. First operand 1034 states and 1876 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 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 06:48:19,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:48:19,197 INFO L93 Difference]: Finished difference Result 3696 states and 6823 transitions. [2023-11-29 06:48:19,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:48:19,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 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 61 [2023-11-29 06:48:19,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:48:19,209 INFO L225 Difference]: With dead ends: 3696 [2023-11-29 06:48:19,210 INFO L226 Difference]: Without dead ends: 2663 [2023-11-29 06:48:19,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:48:19,212 INFO L413 NwaCegarLoop]: 717 mSDtfsCounter, 2638 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 4127 mSolverCounterSat, 1487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2638 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 5614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1487 IncrementalHoareTripleChecker+Valid, 4127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-11-29 06:48:19,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2638 Valid, 1017 Invalid, 5614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1487 Valid, 4127 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2023-11-29 06:48:19,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2663 states. [2023-11-29 06:48:19,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2663 to 2662. [2023-11-29 06:48:19,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2662 states, 2661 states have (on average 1.4611048478015785) internal successors, (3888), 2661 states have internal predecessors, (3888), 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 06:48:19,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 3888 transitions. [2023-11-29 06:48:19,264 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 3888 transitions. Word has length 61 [2023-11-29 06:48:19,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:48:19,265 INFO L495 AbstractCegarLoop]: Abstraction has 2662 states and 3888 transitions. [2023-11-29 06:48:19,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 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 06:48:19,265 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 3888 transitions. [2023-11-29 06:48:19,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2023-11-29 06:48:19,270 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:48:19,270 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:19,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 06:48:19,271 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:48:19,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:19,271 INFO L85 PathProgramCache]: Analyzing trace with hash -302036340, now seen corresponding path program 1 times [2023-11-29 06:48:19,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:19,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201204767] [2023-11-29 06:48:19,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:19,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:19,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:19,548 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:48:19,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:19,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201204767] [2023-11-29 06:48:19,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201204767] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:48:19,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:48:19,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:48:19,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243001556] [2023-11-29 06:48:19,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:48:19,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:48:19,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:19,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:48:19,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:48:19,552 INFO L87 Difference]: Start difference. First operand 2662 states and 3888 transitions. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 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 06:48:26,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:48:26,292 INFO L93 Difference]: Finished difference Result 7863 states and 12668 transitions. [2023-11-29 06:48:26,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:48:26,293 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 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 186 [2023-11-29 06:48:26,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:48:26,327 INFO L225 Difference]: With dead ends: 7863 [2023-11-29 06:48:26,327 INFO L226 Difference]: Without dead ends: 5989 [2023-11-29 06:48:26,331 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 06:48:26,332 INFO L413 NwaCegarLoop]: 892 mSDtfsCounter, 1694 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 5284 mSolverCounterSat, 843 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1694 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 6127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 843 IncrementalHoareTripleChecker+Valid, 5284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:48:26,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1694 Valid, 1066 Invalid, 6127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [843 Valid, 5284 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-11-29 06:48:26,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5989 states. [2023-11-29 06:48:26,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5989 to 5858. [2023-11-29 06:48:26,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5858 states, 5857 states have (on average 1.4452791531500768) internal successors, (8465), 5857 states have internal predecessors, (8465), 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 06:48:26,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5858 states to 5858 states and 8465 transitions. [2023-11-29 06:48:26,475 INFO L78 Accepts]: Start accepts. Automaton has 5858 states and 8465 transitions. Word has length 186 [2023-11-29 06:48:26,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:48:26,476 INFO L495 AbstractCegarLoop]: Abstraction has 5858 states and 8465 transitions. [2023-11-29 06:48:26,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 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 06:48:26,477 INFO L276 IsEmpty]: Start isEmpty. Operand 5858 states and 8465 transitions. [2023-11-29 06:48:26,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2023-11-29 06:48:26,482 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:48:26,482 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:26,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 06:48:26,483 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:48:26,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:26,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1019162791, now seen corresponding path program 1 times [2023-11-29 06:48:26,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:26,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431562613] [2023-11-29 06:48:26,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:26,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-29 06:48:26,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:26,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431562613] [2023-11-29 06:48:26,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431562613] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:48:26,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:48:26,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:48:26,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022989150] [2023-11-29 06:48:26,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:48:26,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:48:26,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:26,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:48:26,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:48:26,736 INFO L87 Difference]: Start difference. First operand 5858 states and 8465 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 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 06:48:30,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:48:30,720 INFO L93 Difference]: Finished difference Result 15686 states and 23389 transitions. [2023-11-29 06:48:30,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:48:30,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 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 228 [2023-11-29 06:48:30,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:48:30,760 INFO L225 Difference]: With dead ends: 15686 [2023-11-29 06:48:30,760 INFO L226 Difference]: Without dead ends: 10616 [2023-11-29 06:48:30,765 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 06:48:30,766 INFO L413 NwaCegarLoop]: 783 mSDtfsCounter, 919 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2555 mSolverCounterSat, 756 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 3311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 756 IncrementalHoareTripleChecker+Valid, 2555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-29 06:48:30,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [919 Valid, 916 Invalid, 3311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [756 Valid, 2555 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-11-29 06:48:30,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10616 states. [2023-11-29 06:48:30,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10616 to 10607. [2023-11-29 06:48:30,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10607 states, 10606 states have (on average 1.3551763152932303) internal successors, (14373), 10606 states have internal predecessors, (14373), 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 06:48:30,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10607 states to 10607 states and 14373 transitions. [2023-11-29 06:48:30,939 INFO L78 Accepts]: Start accepts. Automaton has 10607 states and 14373 transitions. Word has length 228 [2023-11-29 06:48:30,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:48:30,940 INFO L495 AbstractCegarLoop]: Abstraction has 10607 states and 14373 transitions. [2023-11-29 06:48:30,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 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 06:48:30,940 INFO L276 IsEmpty]: Start isEmpty. Operand 10607 states and 14373 transitions. [2023-11-29 06:48:30,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2023-11-29 06:48:30,943 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:48:30,943 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:30,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 06:48:30,944 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:48:30,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:30,944 INFO L85 PathProgramCache]: Analyzing trace with hash 207178262, now seen corresponding path program 1 times [2023-11-29 06:48:30,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:30,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794964210] [2023-11-29 06:48:30,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:30,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:31,138 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-29 06:48:31,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:31,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794964210] [2023-11-29 06:48:31,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794964210] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:48:31,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:48:31,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:48:31,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091122515] [2023-11-29 06:48:31,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:48:31,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:48:31,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:31,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:48:31,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:48:31,141 INFO L87 Difference]: Start difference. First operand 10607 states and 14373 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 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 06:48:35,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:48:35,286 INFO L93 Difference]: Finished difference Result 28350 states and 39239 transitions. [2023-11-29 06:48:35,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:48:35,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 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 242 [2023-11-29 06:48:35,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:48:35,332 INFO L225 Difference]: With dead ends: 28350 [2023-11-29 06:48:35,333 INFO L226 Difference]: Without dead ends: 18531 [2023-11-29 06:48:35,344 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 06:48:35,345 INFO L413 NwaCegarLoop]: 446 mSDtfsCounter, 909 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 2873 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 3417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 2873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:48:35,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 611 Invalid, 3417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 2873 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-11-29 06:48:35,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18531 states. [2023-11-29 06:48:35,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18531 to 18522. [2023-11-29 06:48:35,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18522 states, 18521 states have (on average 1.3251444306462934) internal successors, (24543), 18521 states have internal predecessors, (24543), 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 06:48:35,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18522 states to 18522 states and 24543 transitions. [2023-11-29 06:48:35,699 INFO L78 Accepts]: Start accepts. Automaton has 18522 states and 24543 transitions. Word has length 242 [2023-11-29 06:48:35,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:48:35,699 INFO L495 AbstractCegarLoop]: Abstraction has 18522 states and 24543 transitions. [2023-11-29 06:48:35,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 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 06:48:35,700 INFO L276 IsEmpty]: Start isEmpty. Operand 18522 states and 24543 transitions. [2023-11-29 06:48:35,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2023-11-29 06:48:35,705 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:48:35,706 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:35,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 06:48:35,706 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:48:35,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:35,707 INFO L85 PathProgramCache]: Analyzing trace with hash 512649225, now seen corresponding path program 1 times [2023-11-29 06:48:35,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:35,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007161889] [2023-11-29 06:48:35,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:35,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:35,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:35,963 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 214 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:48:35,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:35,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007161889] [2023-11-29 06:48:35,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007161889] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:48:35,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:48:35,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:48:35,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578818149] [2023-11-29 06:48:35,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:48:35,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:48:35,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:35,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:48:35,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:48:35,966 INFO L87 Difference]: Start difference. First operand 18522 states and 24543 transitions. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 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 06:48:40,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:48:40,020 INFO L93 Difference]: Finished difference Result 52014 states and 69798 transitions. [2023-11-29 06:48:40,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:48:40,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 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 260 [2023-11-29 06:48:40,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:48:40,063 INFO L225 Difference]: With dead ends: 52014 [2023-11-29 06:48:40,063 INFO L226 Difference]: Without dead ends: 34280 [2023-11-29 06:48:40,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:48:40,081 INFO L413 NwaCegarLoop]: 831 mSDtfsCounter, 850 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 2394 mSolverCounterSat, 915 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 3309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 915 IncrementalHoareTripleChecker+Valid, 2394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-29 06:48:40,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [850 Valid, 950 Invalid, 3309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [915 Valid, 2394 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-11-29 06:48:40,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34280 states. [2023-11-29 06:48:40,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34280 to 34270. [2023-11-29 06:48:40,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34270 states, 34269 states have (on average 1.2549242755843473) internal successors, (43005), 34269 states have internal predecessors, (43005), 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 06:48:40,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34270 states to 34270 states and 43005 transitions. [2023-11-29 06:48:40,421 INFO L78 Accepts]: Start accepts. Automaton has 34270 states and 43005 transitions. Word has length 260 [2023-11-29 06:48:40,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:48:40,422 INFO L495 AbstractCegarLoop]: Abstraction has 34270 states and 43005 transitions. [2023-11-29 06:48:40,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 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 06:48:40,422 INFO L276 IsEmpty]: Start isEmpty. Operand 34270 states and 43005 transitions. [2023-11-29 06:48:40,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2023-11-29 06:48:40,428 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:48:40,428 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:40,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 06:48:40,429 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:48:40,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:40,429 INFO L85 PathProgramCache]: Analyzing trace with hash 885901196, now seen corresponding path program 1 times [2023-11-29 06:48:40,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:40,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382389966] [2023-11-29 06:48:40,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:40,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-11-29 06:48:40,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:40,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382389966] [2023-11-29 06:48:40,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382389966] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:48:40,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:48:40,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:48:40,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326032046] [2023-11-29 06:48:40,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:48:40,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:48:40,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:40,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:48:40,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:48:40,668 INFO L87 Difference]: Start difference. First operand 34270 states and 43005 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 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 06:48:44,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:48:44,834 INFO L93 Difference]: Finished difference Result 92928 states and 117607 transitions. [2023-11-29 06:48:44,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:48:44,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 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 291 [2023-11-29 06:48:44,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:48:44,903 INFO L225 Difference]: With dead ends: 92928 [2023-11-29 06:48:44,903 INFO L226 Difference]: Without dead ends: 59446 [2023-11-29 06:48:44,931 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 06:48:44,932 INFO L413 NwaCegarLoop]: 837 mSDtfsCounter, 857 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 869 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 3178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 869 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-11-29 06:48:44,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [857 Valid, 984 Invalid, 3178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [869 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-11-29 06:48:44,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59446 states. [2023-11-29 06:48:45,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59446 to 56293. [2023-11-29 06:48:45,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56293 states, 56292 states have (on average 1.200508065089178) internal successors, (67579), 56292 states have internal predecessors, (67579), 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 06:48:45,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56293 states to 56293 states and 67579 transitions. [2023-11-29 06:48:45,576 INFO L78 Accepts]: Start accepts. Automaton has 56293 states and 67579 transitions. Word has length 291 [2023-11-29 06:48:45,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:48:45,577 INFO L495 AbstractCegarLoop]: Abstraction has 56293 states and 67579 transitions. [2023-11-29 06:48:45,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 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 06:48:45,577 INFO L276 IsEmpty]: Start isEmpty. Operand 56293 states and 67579 transitions. [2023-11-29 06:48:45,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2023-11-29 06:48:45,584 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:48:45,585 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:45,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 06:48:45,585 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:48:45,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:45,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1432596591, now seen corresponding path program 1 times [2023-11-29 06:48:45,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:45,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534681086] [2023-11-29 06:48:45,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:45,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:45,792 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2023-11-29 06:48:45,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:45,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534681086] [2023-11-29 06:48:45,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534681086] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:48:45,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:48:45,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:48:45,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935097131] [2023-11-29 06:48:45,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:48:45,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:48:45,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:45,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:48:45,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:48:45,795 INFO L87 Difference]: Start difference. First operand 56293 states and 67579 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 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 06:48:50,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:48:50,061 INFO L93 Difference]: Finished difference Result 133056 states and 162011 transitions. [2023-11-29 06:48:50,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:48:50,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 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 349 [2023-11-29 06:48:50,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:48:50,128 INFO L225 Difference]: With dead ends: 133056 [2023-11-29 06:48:50,128 INFO L226 Difference]: Without dead ends: 77551 [2023-11-29 06:48:50,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:48:50,151 INFO L413 NwaCegarLoop]: 1794 mSDtfsCounter, 808 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 2543 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 1944 SdHoareTripleChecker+Invalid, 3266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 2543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-29 06:48:50,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [808 Valid, 1944 Invalid, 3266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [723 Valid, 2543 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-11-29 06:48:50,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77551 states. [2023-11-29 06:48:50,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77551 to 76758. [2023-11-29 06:48:50,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76758 states, 76757 states have (on average 1.1668121474262934) internal successors, (89561), 76757 states have internal predecessors, (89561), 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 06:48:51,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76758 states to 76758 states and 89561 transitions. [2023-11-29 06:48:51,119 INFO L78 Accepts]: Start accepts. Automaton has 76758 states and 89561 transitions. Word has length 349 [2023-11-29 06:48:51,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:48:51,120 INFO L495 AbstractCegarLoop]: Abstraction has 76758 states and 89561 transitions. [2023-11-29 06:48:51,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 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 06:48:51,121 INFO L276 IsEmpty]: Start isEmpty. Operand 76758 states and 89561 transitions. [2023-11-29 06:48:51,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2023-11-29 06:48:51,134 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:48:51,134 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:51,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 06:48:51,135 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:48:51,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:51,135 INFO L85 PathProgramCache]: Analyzing trace with hash -752030907, now seen corresponding path program 1 times [2023-11-29 06:48:51,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:51,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841894193] [2023-11-29 06:48:51,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:51,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:51,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 409 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-29 06:48:51,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:51,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841894193] [2023-11-29 06:48:51,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841894193] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:48:51,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:48:51,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:48:51,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425905768] [2023-11-29 06:48:51,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:48:51,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:48:51,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:51,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:48:51,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:48:51,589 INFO L87 Difference]: Start difference. First operand 76758 states and 89561 transitions. Second operand has 4 states, 4 states have (on average 74.75) internal successors, (299), 3 states have internal predecessors, (299), 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 06:48:59,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:48:59,947 INFO L93 Difference]: Finished difference Result 205687 states and 241920 transitions. [2023-11-29 06:48:59,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:48:59,948 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 74.75) internal successors, (299), 3 states have internal predecessors, (299), 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 358 [2023-11-29 06:48:59,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:49:00,178 INFO L225 Difference]: With dead ends: 205687 [2023-11-29 06:49:00,178 INFO L226 Difference]: Without dead ends: 129717 [2023-11-29 06:49:00,203 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 06:49:00,203 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 1735 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 6654 mSolverCounterSat, 1132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1735 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 7786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1132 IncrementalHoareTripleChecker+Valid, 6654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2023-11-29 06:49:00,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1735 Valid, 704 Invalid, 7786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1132 Valid, 6654 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2023-11-29 06:49:00,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129717 states. [2023-11-29 06:49:01,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129717 to 128792. [2023-11-29 06:49:01,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128792 states, 128791 states have (on average 1.162340536217593) internal successors, (149699), 128791 states have internal predecessors, (149699), 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 06:49:01,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128792 states to 128792 states and 149699 transitions. [2023-11-29 06:49:01,747 INFO L78 Accepts]: Start accepts. Automaton has 128792 states and 149699 transitions. Word has length 358 [2023-11-29 06:49:01,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:49:01,747 INFO L495 AbstractCegarLoop]: Abstraction has 128792 states and 149699 transitions. [2023-11-29 06:49:01,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.75) internal successors, (299), 3 states have internal predecessors, (299), 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 06:49:01,748 INFO L276 IsEmpty]: Start isEmpty. Operand 128792 states and 149699 transitions. [2023-11-29 06:49:01,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2023-11-29 06:49:01,757 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:49:01,757 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:49:01,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 06:49:01,758 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:49:01,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:49:01,758 INFO L85 PathProgramCache]: Analyzing trace with hash 426386066, now seen corresponding path program 1 times [2023-11-29 06:49:01,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:49:01,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180054880] [2023-11-29 06:49:01,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:49:01,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:49:01,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:49:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-11-29 06:49:02,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:49:02,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180054880] [2023-11-29 06:49:02,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180054880] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:49:02,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:49:02,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:49:02,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012902145] [2023-11-29 06:49:02,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:49:02,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:49:02,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:49:02,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:49:02,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:49:02,357 INFO L87 Difference]: Start difference. First operand 128792 states and 149699 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 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 06:49:06,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:49:06,599 INFO L93 Difference]: Finished difference Result 240270 states and 281023 transitions. [2023-11-29 06:49:06,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:49:06,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 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 358 [2023-11-29 06:49:06,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:49:06,732 INFO L225 Difference]: With dead ends: 240270 [2023-11-29 06:49:06,733 INFO L226 Difference]: Without dead ends: 128805 [2023-11-29 06:49:06,767 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 06:49:06,768 INFO L413 NwaCegarLoop]: 1017 mSDtfsCounter, 730 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 2706 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 2710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:49:06,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 1197 Invalid, 2710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2706 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-11-29 06:49:06,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128805 states. [2023-11-29 06:49:07,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128805 to 128005. [2023-11-29 06:49:07,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128005 states, 128004 states have (on average 1.1624402362426174) internal successors, (148797), 128004 states have internal predecessors, (148797), 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 06:49:08,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128005 states to 128005 states and 148797 transitions. [2023-11-29 06:49:08,280 INFO L78 Accepts]: Start accepts. Automaton has 128005 states and 148797 transitions. Word has length 358 [2023-11-29 06:49:08,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:49:08,281 INFO L495 AbstractCegarLoop]: Abstraction has 128005 states and 148797 transitions. [2023-11-29 06:49:08,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 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 06:49:08,282 INFO L276 IsEmpty]: Start isEmpty. Operand 128005 states and 148797 transitions. [2023-11-29 06:49:08,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2023-11-29 06:49:08,289 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:49:08,289 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:49:08,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 06:49:08,290 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:49:08,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:49:08,290 INFO L85 PathProgramCache]: Analyzing trace with hash 552052186, now seen corresponding path program 1 times [2023-11-29 06:49:08,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:49:08,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358994625] [2023-11-29 06:49:08,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:49:08,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:49:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:49:09,754 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 288 proven. 113 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-29 06:49:09,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:49:09,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358994625] [2023-11-29 06:49:09,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358994625] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:49:09,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307215638] [2023-11-29 06:49:09,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:49:09,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:49:09,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:49:09,772 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:49:09,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:49:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:49:09,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 06:49:09,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:49:10,181 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2023-11-29 06:49:10,182 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:49:10,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307215638] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:49:10,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:49:10,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2023-11-29 06:49:10,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037150327] [2023-11-29 06:49:10,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:49:10,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:49:10,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:49:10,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:49:10,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:49:10,184 INFO L87 Difference]: Start difference. First operand 128005 states and 148797 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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 06:49:14,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:49:14,025 INFO L93 Difference]: Finished difference Result 254433 states and 295648 transitions. [2023-11-29 06:49:14,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:49:14,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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 387 [2023-11-29 06:49:14,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:49:14,150 INFO L225 Difference]: With dead ends: 254433 [2023-11-29 06:49:14,150 INFO L226 Difference]: Without dead ends: 127216 [2023-11-29 06:49:14,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:49:14,199 INFO L413 NwaCegarLoop]: 1361 mSDtfsCounter, 1122 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 2467 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1122 SdHoareTripleChecker+Valid, 1441 SdHoareTripleChecker+Invalid, 2917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 2467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:49:14,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1122 Valid, 1441 Invalid, 2917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 2467 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-29 06:49:14,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127216 states. [2023-11-29 06:49:15,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127216 to 127215. [2023-11-29 06:49:15,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127215 states, 127214 states have (on average 1.1196802238747308) internal successors, (142439), 127214 states have internal predecessors, (142439), 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 06:49:15,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127215 states to 127215 states and 142439 transitions. [2023-11-29 06:49:15,737 INFO L78 Accepts]: Start accepts. Automaton has 127215 states and 142439 transitions. Word has length 387 [2023-11-29 06:49:15,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:49:15,738 INFO L495 AbstractCegarLoop]: Abstraction has 127215 states and 142439 transitions. [2023-11-29 06:49:15,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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 06:49:15,738 INFO L276 IsEmpty]: Start isEmpty. Operand 127215 states and 142439 transitions. [2023-11-29 06:49:15,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2023-11-29 06:49:15,901 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:49:15,901 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:49:15,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:49:16,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 06:49:16,107 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:49:16,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:49:16,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1028522147, now seen corresponding path program 1 times [2023-11-29 06:49:16,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:49:16,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161900603] [2023-11-29 06:49:16,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:49:16,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:49:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:49:16,519 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 466 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2023-11-29 06:49:16,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:49:16,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161900603] [2023-11-29 06:49:16,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161900603] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:49:16,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:49:16,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:49:16,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531960944] [2023-11-29 06:49:16,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:49:16,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:49:16,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:49:16,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:49:16,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:49:16,522 INFO L87 Difference]: Start difference. First operand 127215 states and 142439 transitions. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 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 06:49:21,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:49:21,385 INFO L93 Difference]: Finished difference Result 279628 states and 316498 transitions. [2023-11-29 06:49:21,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:49:21,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 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 455 [2023-11-29 06:49:21,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:49:21,526 INFO L225 Difference]: With dead ends: 279628 [2023-11-29 06:49:21,526 INFO L226 Difference]: Without dead ends: 153201 [2023-11-29 06:49:21,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:49:21,566 INFO L413 NwaCegarLoop]: 1757 mSDtfsCounter, 787 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2535 mSolverCounterSat, 714 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 1910 SdHoareTripleChecker+Invalid, 3249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 714 IncrementalHoareTripleChecker+Valid, 2535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:49:21,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [787 Valid, 1910 Invalid, 3249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [714 Valid, 2535 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-11-29 06:49:21,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153201 states. [2023-11-29 06:49:23,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153201 to 150819. [2023-11-29 06:49:23,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150819 states, 150818 states have (on average 1.1036481056637801) internal successors, (166450), 150818 states have internal predecessors, (166450), 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 06:49:23,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150819 states to 150819 states and 166450 transitions. [2023-11-29 06:49:23,241 INFO L78 Accepts]: Start accepts. Automaton has 150819 states and 166450 transitions. Word has length 455 [2023-11-29 06:49:23,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:49:23,242 INFO L495 AbstractCegarLoop]: Abstraction has 150819 states and 166450 transitions. [2023-11-29 06:49:23,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 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 06:49:23,242 INFO L276 IsEmpty]: Start isEmpty. Operand 150819 states and 166450 transitions. [2023-11-29 06:49:23,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2023-11-29 06:49:23,256 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:49:23,256 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:49:23,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 06:49:23,257 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:49:23,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:49:23,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1869032193, now seen corresponding path program 1 times [2023-11-29 06:49:23,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:49:23,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301293738] [2023-11-29 06:49:23,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:49:23,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:49:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:49:24,028 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-29 06:49:24,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:49:24,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301293738] [2023-11-29 06:49:24,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301293738] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:49:24,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:49:24,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:49:24,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886374424] [2023-11-29 06:49:24,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:49:24,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:49:24,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:49:24,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:49:24,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:49:24,032 INFO L87 Difference]: Start difference. First operand 150819 states and 166450 transitions. Second operand has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 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 06:49:29,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:49:29,845 INFO L93 Difference]: Finished difference Result 365543 states and 404233 transitions. [2023-11-29 06:49:29,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:49:29,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 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 465 [2023-11-29 06:49:29,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:49:30,062 INFO L225 Difference]: With dead ends: 365543 [2023-11-29 06:49:30,062 INFO L226 Difference]: Without dead ends: 215512 [2023-11-29 06:49:30,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:49:30,105 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 961 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 3085 mSolverCounterSat, 674 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 3759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 674 IncrementalHoareTripleChecker+Valid, 3085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-11-29 06:49:30,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [961 Valid, 578 Invalid, 3759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [674 Valid, 3085 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-11-29 06:49:30,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215512 states. [2023-11-29 06:49:32,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215512 to 214615. [2023-11-29 06:49:32,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214615 states, 214614 states have (on average 1.1051189577567166) internal successors, (237174), 214614 states have internal predecessors, (237174), 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 06:49:32,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214615 states to 214615 states and 237174 transitions. [2023-11-29 06:49:32,902 INFO L78 Accepts]: Start accepts. Automaton has 214615 states and 237174 transitions. Word has length 465 [2023-11-29 06:49:32,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:49:32,903 INFO L495 AbstractCegarLoop]: Abstraction has 214615 states and 237174 transitions. [2023-11-29 06:49:32,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 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 06:49:32,904 INFO L276 IsEmpty]: Start isEmpty. Operand 214615 states and 237174 transitions. [2023-11-29 06:49:32,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2023-11-29 06:49:32,916 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:49:32,916 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:49:32,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 06:49:32,916 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:49:32,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:49:32,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1880121944, now seen corresponding path program 1 times [2023-11-29 06:49:32,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:49:32,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747714779] [2023-11-29 06:49:32,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:49:32,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:49:32,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:49:33,923 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 360 proven. 110 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-29 06:49:33,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:49:33,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747714779] [2023-11-29 06:49:33,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747714779] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:49:33,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269466261] [2023-11-29 06:49:33,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:49:33,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:49:33,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:49:33,925 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:49:33,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:49:34,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:49:34,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 06:49:34,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:49:34,159 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 357 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2023-11-29 06:49:34,159 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:49:34,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269466261] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:49:34,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:49:34,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2023-11-29 06:49:34,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125808243] [2023-11-29 06:49:34,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:49:34,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:49:34,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:49:34,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:49:34,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:49:34,162 INFO L87 Difference]: Start difference. First operand 214615 states and 237174 transitions. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 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 06:49:39,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:49:39,556 INFO L93 Difference]: Finished difference Result 463051 states and 513271 transitions. [2023-11-29 06:49:39,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:49:39,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 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 477 [2023-11-29 06:49:39,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:49:39,855 INFO L225 Difference]: With dead ends: 463051 [2023-11-29 06:49:39,855 INFO L226 Difference]: Without dead ends: 267335 [2023-11-29 06:49:39,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:49:39,946 INFO L413 NwaCegarLoop]: 1644 mSDtfsCounter, 937 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 2663 mSolverCounterSat, 759 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 3422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 759 IncrementalHoareTripleChecker+Valid, 2663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:49:39,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [937 Valid, 1759 Invalid, 3422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [759 Valid, 2663 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-11-29 06:49:40,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267335 states. [2023-11-29 06:49:42,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267335 to 246067. [2023-11-29 06:49:42,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246067 states, 246066 states have (on average 1.0949663911308347) internal successors, (269434), 246066 states have internal predecessors, (269434), 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 06:49:43,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246067 states to 246067 states and 269434 transitions. [2023-11-29 06:49:43,147 INFO L78 Accepts]: Start accepts. Automaton has 246067 states and 269434 transitions. Word has length 477 [2023-11-29 06:49:43,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:49:43,147 INFO L495 AbstractCegarLoop]: Abstraction has 246067 states and 269434 transitions. [2023-11-29 06:49:43,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 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 06:49:43,148 INFO L276 IsEmpty]: Start isEmpty. Operand 246067 states and 269434 transitions. [2023-11-29 06:49:43,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2023-11-29 06:49:43,160 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:49:43,161 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:49:43,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:49:43,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 06:49:43,362 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:49:43,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:49:43,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1525891824, now seen corresponding path program 1 times [2023-11-29 06:49:43,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:49:43,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340507258] [2023-11-29 06:49:43,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:49:43,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:49:43,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:49:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 623 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2023-11-29 06:49:43,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:49:43,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340507258] [2023-11-29 06:49:43,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340507258] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:49:43,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:49:43,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:49:43,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70418828] [2023-11-29 06:49:43,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:49:43,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:49:43,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:49:43,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:49:43,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:49:43,727 INFO L87 Difference]: Start difference. First operand 246067 states and 269434 transitions. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 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 06:49:48,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:49:48,602 INFO L93 Difference]: Finished difference Result 490562 states and 537090 transitions. [2023-11-29 06:49:48,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:49:48,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 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 518 [2023-11-29 06:49:48,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:49:48,872 INFO L225 Difference]: With dead ends: 490562 [2023-11-29 06:49:48,872 INFO L226 Difference]: Without dead ends: 245283 [2023-11-29 06:49:48,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:49:48,956 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 925 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 2355 mSolverCounterSat, 718 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 3073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 718 IncrementalHoareTripleChecker+Valid, 2355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:49:48,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [925 Valid, 700 Invalid, 3073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [718 Valid, 2355 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-29 06:49:49,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245283 states. [2023-11-29 06:49:51,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245283 to 243686. [2023-11-29 06:49:51,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243686 states, 243685 states have (on average 1.0802716621868396) internal successors, (263246), 243685 states have internal predecessors, (263246), 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 06:49:52,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243686 states to 243686 states and 263246 transitions. [2023-11-29 06:49:52,274 INFO L78 Accepts]: Start accepts. Automaton has 243686 states and 263246 transitions. Word has length 518 [2023-11-29 06:49:52,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:49:52,275 INFO L495 AbstractCegarLoop]: Abstraction has 243686 states and 263246 transitions. [2023-11-29 06:49:52,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 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 06:49:52,275 INFO L276 IsEmpty]: Start isEmpty. Operand 243686 states and 263246 transitions. [2023-11-29 06:49:52,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2023-11-29 06:49:52,296 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:49:52,305 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:49:52,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-29 06:49:52,305 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:49:52,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:49:52,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1916587185, now seen corresponding path program 1 times [2023-11-29 06:49:52,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:49:52,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432419418] [2023-11-29 06:49:52,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:49:52,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:49:52,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:49:53,746 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 357 proven. 113 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-29 06:49:53,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:49:53,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432419418] [2023-11-29 06:49:53,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432419418] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:49:53,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232174755] [2023-11-29 06:49:53,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:49:53,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:49:53,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:49:53,748 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:49:53,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:49:53,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:49:53,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 06:49:53,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:49:53,952 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2023-11-29 06:49:53,952 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:49:53,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232174755] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:49:53,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:49:53,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2023-11-29 06:49:53,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603887129] [2023-11-29 06:49:53,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:49:53,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:49:53,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:49:53,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:49:53,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:49:53,955 INFO L87 Difference]: Start difference. First operand 243686 states and 263246 transitions. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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 06:49:58,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:49:58,697 INFO L93 Difference]: Finished difference Result 465322 states and 503846 transitions. [2023-11-29 06:49:58,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:49:58,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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 533 [2023-11-29 06:49:58,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:49:58,962 INFO L225 Difference]: With dead ends: 465322 [2023-11-29 06:49:58,962 INFO L226 Difference]: Without dead ends: 243681 [2023-11-29 06:49:59,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:49:59,034 INFO L413 NwaCegarLoop]: 1707 mSDtfsCounter, 915 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 2373 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 915 SdHoareTripleChecker+Valid, 1832 SdHoareTripleChecker+Invalid, 2672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 2373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:49:59,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [915 Valid, 1832 Invalid, 2672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 2373 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-29 06:49:59,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243681 states. [2023-11-29 06:50:01,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243681 to 243678. [2023-11-29 06:50:01,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243678 states, 243677 states have (on average 1.080237363394986) internal successors, (263229), 243677 states have internal predecessors, (263229), 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 06:50:01,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243678 states to 243678 states and 263229 transitions. [2023-11-29 06:50:01,868 INFO L78 Accepts]: Start accepts. Automaton has 243678 states and 263229 transitions. Word has length 533 [2023-11-29 06:50:01,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:50:01,869 INFO L495 AbstractCegarLoop]: Abstraction has 243678 states and 263229 transitions. [2023-11-29 06:50:01,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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 06:50:01,869 INFO L276 IsEmpty]: Start isEmpty. Operand 243678 states and 263229 transitions. [2023-11-29 06:50:01,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2023-11-29 06:50:01,884 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:50:01,885 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:50:01,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:50:02,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 06:50:02,086 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:50:02,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:50:02,086 INFO L85 PathProgramCache]: Analyzing trace with hash 965179590, now seen corresponding path program 1 times [2023-11-29 06:50:02,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:50:02,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144674707] [2023-11-29 06:50:02,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:02,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:50:02,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:50:02,309 INFO L134 CoverageAnalysis]: Checked inductivity of 824 backedges. 552 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2023-11-29 06:50:02,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:50:02,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144674707] [2023-11-29 06:50:02,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144674707] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:50:02,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:50:02,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:50:02,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50695782] [2023-11-29 06:50:02,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:50:02,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:50:02,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:50:02,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:50:02,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:50:02,313 INFO L87 Difference]: Start difference. First operand 243678 states and 263229 transitions. Second operand has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 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 06:50:06,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:50:06,958 INFO L93 Difference]: Finished difference Result 487325 states and 526322 transitions. [2023-11-29 06:50:06,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:50:06,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 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 552 [2023-11-29 06:50:06,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:50:07,547 INFO L225 Difference]: With dead ends: 487325 [2023-11-29 06:50:07,548 INFO L226 Difference]: Without dead ends: 243648 [2023-11-29 06:50:07,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:50:07,636 INFO L413 NwaCegarLoop]: 1461 mSDtfsCounter, 932 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 2336 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 932 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 2923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 2336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:50:07,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [932 Valid, 1586 Invalid, 2923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 2336 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-29 06:50:07,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243648 states. [2023-11-29 06:50:09,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243648 to 235765. [2023-11-29 06:50:09,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235765 states, 235764 states have (on average 1.0570146417604045) internal successors, (249206), 235764 states have internal predecessors, (249206), 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 06:50:10,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235765 states to 235765 states and 249206 transitions. [2023-11-29 06:50:10,162 INFO L78 Accepts]: Start accepts. Automaton has 235765 states and 249206 transitions. Word has length 552 [2023-11-29 06:50:10,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:50:10,162 INFO L495 AbstractCegarLoop]: Abstraction has 235765 states and 249206 transitions. [2023-11-29 06:50:10,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 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 06:50:10,162 INFO L276 IsEmpty]: Start isEmpty. Operand 235765 states and 249206 transitions. [2023-11-29 06:50:10,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2023-11-29 06:50:10,173 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:50:10,174 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:50:10,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-29 06:50:10,174 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:50:10,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:50:10,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1660457963, now seen corresponding path program 1 times [2023-11-29 06:50:10,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:50:10,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017261747] [2023-11-29 06:50:10,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:10,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:50:10,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:50:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 623 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2023-11-29 06:50:11,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:50:11,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017261747] [2023-11-29 06:50:11,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017261747] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:50:11,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:50:11,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:50:11,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027590998] [2023-11-29 06:50:11,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:50:11,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:50:11,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:50:11,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:50:11,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:50:11,158 INFO L87 Difference]: Start difference. First operand 235765 states and 249206 transitions. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 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 06:50:15,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:50:15,959 INFO L93 Difference]: Finished difference Result 472326 states and 499215 transitions. [2023-11-29 06:50:15,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:50:15,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 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 561 [2023-11-29 06:50:15,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:50:16,196 INFO L225 Difference]: With dead ends: 472326 [2023-11-29 06:50:16,196 INFO L226 Difference]: Without dead ends: 237349 [2023-11-29 06:50:16,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:50:16,268 INFO L413 NwaCegarLoop]: 1375 mSDtfsCounter, 858 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2474 mSolverCounterSat, 576 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 1456 SdHoareTripleChecker+Invalid, 3050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 576 IncrementalHoareTripleChecker+Valid, 2474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-29 06:50:16,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [858 Valid, 1456 Invalid, 3050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [576 Valid, 2474 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-29 06:50:16,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237349 states. [2023-11-29 06:50:18,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237349 to 234189. [2023-11-29 06:50:18,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234189 states, 234188 states have (on average 1.04742770765368) internal successors, (245295), 234188 states have internal predecessors, (245295), 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 06:50:19,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234189 states to 234189 states and 245295 transitions. [2023-11-29 06:50:19,201 INFO L78 Accepts]: Start accepts. Automaton has 234189 states and 245295 transitions. Word has length 561 [2023-11-29 06:50:19,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:50:19,202 INFO L495 AbstractCegarLoop]: Abstraction has 234189 states and 245295 transitions. [2023-11-29 06:50:19,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 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 06:50:19,202 INFO L276 IsEmpty]: Start isEmpty. Operand 234189 states and 245295 transitions. [2023-11-29 06:50:19,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2023-11-29 06:50:19,219 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:50:19,220 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:50:19,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-29 06:50:19,220 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:50:19,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:50:19,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1325514422, now seen corresponding path program 1 times [2023-11-29 06:50:19,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:50:19,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743265216] [2023-11-29 06:50:19,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:19,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:50:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:50:20,774 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 387 proven. 110 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-29 06:50:20,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:50:20,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743265216] [2023-11-29 06:50:20,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743265216] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:50:20,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244081529] [2023-11-29 06:50:20,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:20,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:50:20,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:50:20,776 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:50:20,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:50:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:50:21,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 06:50:21,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:50:21,545 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-11-29 06:50:21,545 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:50:21,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244081529] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:50:21,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:50:21,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-29 06:50:21,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268211971] [2023-11-29 06:50:21,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:50:21,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:50:21,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:50:21,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:50:21,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:50:21,548 INFO L87 Difference]: Start difference. First operand 234189 states and 245295 transitions. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 2 states have internal predecessors, (328), 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 06:50:24,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:50:24,612 INFO L93 Difference]: Finished difference Result 445530 states and 467212 transitions. [2023-11-29 06:50:24,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:50:24,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 2 states have internal predecessors, (328), 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 580 [2023-11-29 06:50:24,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:50:24,847 INFO L225 Difference]: With dead ends: 445530 [2023-11-29 06:50:24,847 INFO L226 Difference]: Without dead ends: 232597 [2023-11-29 06:50:24,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 579 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:50:24,928 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 1524 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1509 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1524 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:50:24,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1524 Valid, 280 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1509 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-29 06:50:25,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232597 states. [2023-11-29 06:50:27,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232597 to 232596. [2023-11-29 06:50:27,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232596 states, 232595 states have (on average 1.0470732388916357) internal successors, (243544), 232595 states have internal predecessors, (243544), 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 06:50:27,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232596 states to 232596 states and 243544 transitions. [2023-11-29 06:50:27,976 INFO L78 Accepts]: Start accepts. Automaton has 232596 states and 243544 transitions. Word has length 580 [2023-11-29 06:50:27,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:50:27,977 INFO L495 AbstractCegarLoop]: Abstraction has 232596 states and 243544 transitions. [2023-11-29 06:50:27,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 2 states have internal predecessors, (328), 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 06:50:27,977 INFO L276 IsEmpty]: Start isEmpty. Operand 232596 states and 243544 transitions. [2023-11-29 06:50:27,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2023-11-29 06:50:27,990 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:50:27,991 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:50:27,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:50:28,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:50:28,191 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:50:28,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:50:28,192 INFO L85 PathProgramCache]: Analyzing trace with hash 892996841, now seen corresponding path program 1 times [2023-11-29 06:50:28,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:50:28,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365912520] [2023-11-29 06:50:28,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:28,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:50:28,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:50:29,579 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 571 proven. 110 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-11-29 06:50:29,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:50:29,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365912520] [2023-11-29 06:50:29,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365912520] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:50:29,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304800538] [2023-11-29 06:50:29,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:29,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:50:29,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:50:29,581 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:50:29,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:50:29,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:50:29,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 06:50:29,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:50:30,549 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 557 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2023-11-29 06:50:30,549 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:50:30,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304800538] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:50:30,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:50:30,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-29 06:50:30,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362815117] [2023-11-29 06:50:30,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:50:30,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:50:30,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:50:30,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:50:30,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:50:30,551 INFO L87 Difference]: Start difference. First operand 232596 states and 243544 transitions. Second operand has 3 states, 3 states have (on average 124.0) internal successors, (372), 2 states have internal predecessors, (372), 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 06:50:34,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:50:34,720 INFO L93 Difference]: Finished difference Result 458117 states and 480432 transitions. [2023-11-29 06:50:34,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:50:34,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 2 states have internal predecessors, (372), 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 623 [2023-11-29 06:50:34,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:50:34,960 INFO L225 Difference]: With dead ends: 458117 [2023-11-29 06:50:34,960 INFO L226 Difference]: Without dead ends: 245198 [2023-11-29 06:50:35,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 622 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:50:35,270 INFO L413 NwaCegarLoop]: 1000 mSDtfsCounter, 617 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 2435 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 2582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 2435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:50:35,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 1131 Invalid, 2582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 2435 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-29 06:50:35,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245198 states. [2023-11-29 06:50:37,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245198 to 242038. [2023-11-29 06:50:37,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242038 states, 242037 states have (on average 1.0430388742217098) internal successors, (252454), 242037 states have internal predecessors, (252454), 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 06:50:37,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242038 states to 242038 states and 252454 transitions. [2023-11-29 06:50:37,881 INFO L78 Accepts]: Start accepts. Automaton has 242038 states and 252454 transitions. Word has length 623 [2023-11-29 06:50:37,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:50:37,882 INFO L495 AbstractCegarLoop]: Abstraction has 242038 states and 252454 transitions. [2023-11-29 06:50:37,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 2 states have internal predecessors, (372), 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 06:50:37,882 INFO L276 IsEmpty]: Start isEmpty. Operand 242038 states and 252454 transitions. [2023-11-29 06:50:37,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 650 [2023-11-29 06:50:37,893 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:50:37,893 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:50:37,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 06:50:38,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:50:38,094 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:50:38,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:50:38,094 INFO L85 PathProgramCache]: Analyzing trace with hash 506036429, now seen corresponding path program 1 times [2023-11-29 06:50:38,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:50:38,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287307368] [2023-11-29 06:50:38,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:38,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:50:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:50:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 900 proven. 0 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2023-11-29 06:50:39,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:50:39,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287307368] [2023-11-29 06:50:39,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287307368] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:50:39,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:50:39,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:50:39,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963806712] [2023-11-29 06:50:39,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:50:39,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:50:39,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:50:39,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:50:39,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:50:39,060 INFO L87 Difference]: Start difference. First operand 242038 states and 252454 transitions. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 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 06:50:43,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:50:43,581 INFO L93 Difference]: Finished difference Result 508495 states and 530995 transitions. [2023-11-29 06:50:43,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:50:43,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 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 649 [2023-11-29 06:50:43,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:50:43,858 INFO L225 Difference]: With dead ends: 508495 [2023-11-29 06:50:43,859 INFO L226 Difference]: Without dead ends: 267245 [2023-11-29 06:50:43,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:50:43,944 INFO L413 NwaCegarLoop]: 878 mSDtfsCounter, 736 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 2522 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 2722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 2522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:50:43,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 1003 Invalid, 2722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 2522 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-29 06:50:44,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267245 states. [2023-11-29 06:50:46,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267245 to 256988. [2023-11-29 06:50:46,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256988 states, 256987 states have (on average 1.042239490713538) internal successors, (267842), 256987 states have internal predecessors, (267842), 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 06:50:47,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256988 states to 256988 states and 267842 transitions. [2023-11-29 06:50:47,123 INFO L78 Accepts]: Start accepts. Automaton has 256988 states and 267842 transitions. Word has length 649 [2023-11-29 06:50:47,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:50:47,124 INFO L495 AbstractCegarLoop]: Abstraction has 256988 states and 267842 transitions. [2023-11-29 06:50:47,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 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 06:50:47,124 INFO L276 IsEmpty]: Start isEmpty. Operand 256988 states and 267842 transitions. [2023-11-29 06:50:47,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2023-11-29 06:50:47,137 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:50:47,138 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:50:47,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-29 06:50:47,138 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:50:47,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:50:47,138 INFO L85 PathProgramCache]: Analyzing trace with hash 554269683, now seen corresponding path program 1 times [2023-11-29 06:50:47,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:50:47,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647501774] [2023-11-29 06:50:47,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:47,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:50:47,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:50:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1527 backedges. 771 proven. 0 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2023-11-29 06:50:47,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:50:47,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647501774] [2023-11-29 06:50:47,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647501774] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:50:47,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:50:47,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:50:47,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566772236] [2023-11-29 06:50:47,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:50:47,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:50:47,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:50:47,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:50:47,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:50:47,559 INFO L87 Difference]: Start difference. First operand 256988 states and 267842 transitions. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 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 06:50:53,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:50:53,221 INFO L93 Difference]: Finished difference Result 560442 states and 585739 transitions. [2023-11-29 06:50:53,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:50:53,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 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 651 [2023-11-29 06:50:53,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:50:53,548 INFO L225 Difference]: With dead ends: 560442 [2023-11-29 06:50:53,548 INFO L226 Difference]: Without dead ends: 323921 [2023-11-29 06:50:53,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:50:53,610 INFO L413 NwaCegarLoop]: 505 mSDtfsCounter, 891 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 2382 mSolverCounterSat, 876 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 3258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 876 IncrementalHoareTripleChecker+Valid, 2382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:50:53,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [891 Valid, 578 Invalid, 3258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [876 Valid, 2382 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-11-29 06:50:53,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323921 states. [2023-11-29 06:50:56,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323921 to 315253. [2023-11-29 06:50:56,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315253 states, 315252 states have (on average 1.0405897504218846) internal successors, (328048), 315252 states have internal predecessors, (328048), 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 06:50:57,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315253 states to 315253 states and 328048 transitions. [2023-11-29 06:50:57,232 INFO L78 Accepts]: Start accepts. Automaton has 315253 states and 328048 transitions. Word has length 651 [2023-11-29 06:50:57,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:50:57,232 INFO L495 AbstractCegarLoop]: Abstraction has 315253 states and 328048 transitions. [2023-11-29 06:50:57,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 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 06:50:57,232 INFO L276 IsEmpty]: Start isEmpty. Operand 315253 states and 328048 transitions. [2023-11-29 06:50:57,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 692 [2023-11-29 06:50:57,244 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:50:57,245 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:50:57,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-29 06:50:57,245 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:50:57,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:50:57,245 INFO L85 PathProgramCache]: Analyzing trace with hash 527389587, now seen corresponding path program 1 times [2023-11-29 06:50:57,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:50:57,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851496192] [2023-11-29 06:50:57,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:57,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:50:57,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:50:58,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 427 proven. 638 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2023-11-29 06:50:58,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:50:58,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851496192] [2023-11-29 06:50:58,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851496192] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:50:58,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427872480] [2023-11-29 06:50:58,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:58,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:50:58,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:50:58,598 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:50:58,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:50:58,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:50:58,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:50:58,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:50:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 759 proven. 0 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2023-11-29 06:50:59,125 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:50:59,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427872480] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:50:59,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:50:59,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-29 06:50:59,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755070876] [2023-11-29 06:50:59,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:50:59,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:50:59,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:50:59,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:50:59,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:50:59,127 INFO L87 Difference]: Start difference. First operand 315253 states and 328048 transitions. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 3 states have internal predecessors, (364), 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 06:51:06,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:51:06,993 INFO L93 Difference]: Finished difference Result 677874 states and 705426 transitions. [2023-11-29 06:51:06,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:51:06,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 3 states have internal predecessors, (364), 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 691 [2023-11-29 06:51:06,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:51:07,381 INFO L225 Difference]: With dead ends: 677874 [2023-11-29 06:51:07,382 INFO L226 Difference]: Without dead ends: 363409 [2023-11-29 06:51:07,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 694 GetRequests, 689 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:51:07,490 INFO L413 NwaCegarLoop]: 547 mSDtfsCounter, 1666 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 5446 mSolverCounterSat, 708 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1666 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 6154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 708 IncrementalHoareTripleChecker+Valid, 5446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:51:07,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1666 Valid, 712 Invalid, 6154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [708 Valid, 5446 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-11-29 06:51:07,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363409 states. [2023-11-29 06:51:10,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363409 to 353842. [2023-11-29 06:51:11,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353842 states, 353841 states have (on average 1.040809290048355) internal successors, (368281), 353841 states have internal predecessors, (368281), 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 06:51:11,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353842 states to 353842 states and 368281 transitions. [2023-11-29 06:51:11,972 INFO L78 Accepts]: Start accepts. Automaton has 353842 states and 368281 transitions. Word has length 691 [2023-11-29 06:51:11,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:51:11,972 INFO L495 AbstractCegarLoop]: Abstraction has 353842 states and 368281 transitions. [2023-11-29 06:51:11,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 3 states have internal predecessors, (364), 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 06:51:11,973 INFO L276 IsEmpty]: Start isEmpty. Operand 353842 states and 368281 transitions. [2023-11-29 06:51:11,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2023-11-29 06:51:11,987 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:51:11,988 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:51:11,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 06:51:12,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:51:12,189 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:51:12,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:51:12,189 INFO L85 PathProgramCache]: Analyzing trace with hash -655071516, now seen corresponding path program 1 times [2023-11-29 06:51:12,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:51:12,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111829956] [2023-11-29 06:51:12,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:12,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:51:12,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:51:13,045 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 582 proven. 228 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2023-11-29 06:51:13,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:51:13,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111829956] [2023-11-29 06:51:13,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111829956] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:51:13,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819031813] [2023-11-29 06:51:13,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:13,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:51:13,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:51:13,047 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:51:13,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c070ced-b369-4c6c-a483-1fb84f4dc808/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:51:13,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:51:13,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:51:13,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:51:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 582 proven. 228 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2023-11-29 06:51:14,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:51:14,946 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 582 proven. 228 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2023-11-29 06:51:14,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819031813] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:51:14,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:51:14,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-29 06:51:14,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144477018] [2023-11-29 06:51:14,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:51:14,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:51:14,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:51:14,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:51:14,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:51:14,950 INFO L87 Difference]: Start difference. First operand 353842 states and 368281 transitions. Second operand has 6 states, 6 states have (on average 199.5) internal successors, (1197), 5 states have internal predecessors, (1197), 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 06:51:26,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:51:26,765 INFO L93 Difference]: Finished difference Result 745488 states and 776788 transitions. [2023-11-29 06:51:26,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:51:26,766 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 199.5) internal successors, (1197), 5 states have internal predecessors, (1197), 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 845 [2023-11-29 06:51:26,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:51:27,236 INFO L225 Difference]: With dead ends: 745488 [2023-11-29 06:51:27,237 INFO L226 Difference]: Without dead ends: 405017 [2023-11-29 06:51:27,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1691 GetRequests, 1687 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:51:27,359 INFO L413 NwaCegarLoop]: 452 mSDtfsCounter, 3166 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 7637 mSolverCounterSat, 2232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3166 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 9869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2232 IncrementalHoareTripleChecker+Valid, 7637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2023-11-29 06:51:27,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3166 Valid, 737 Invalid, 9869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2232 Valid, 7637 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2023-11-29 06:51:27,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405017 states.