./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/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_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label11.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/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_51363b57-24fc-460d-89e5-8b69c6e9cf21/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 d617eb63717df2c143c72a2b28226809849fdb6b46ba3b8819c6be91e87f3a08 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:21:01,975 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:21:02,040 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 20:21:02,045 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:21:02,046 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:21:02,068 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:21:02,069 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:21:02,069 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:21:02,070 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:21:02,071 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:21:02,071 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:21:02,072 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:21:02,073 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:21:02,073 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:21:02,074 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:21:02,074 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:21:02,075 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 20:21:02,075 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:21:02,076 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:21:02,076 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:21:02,076 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:21:02,077 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 20:21:02,077 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:21:02,078 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 20:21:02,078 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:21:02,079 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 20:21:02,079 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:21:02,079 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:21:02,080 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:21:02,080 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:21:02,080 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:21:02,081 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:21:02,081 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:21:02,081 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:21:02,082 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 20:21:02,082 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:21:02,082 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:21:02,082 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:21:02,082 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:21:02,083 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 20:21:02,083 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:21:02,083 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:21:02,083 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_51363b57-24fc-460d-89e5-8b69c6e9cf21/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d617eb63717df2c143c72a2b28226809849fdb6b46ba3b8819c6be91e87f3a08 [2023-11-28 20:21:02,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:21:02,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:21:02,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:21:02,306 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:21:02,306 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:21:02,307 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/eca-rers2012/Problem17_label11.c [2023-11-28 20:21:05,096 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:21:05,440 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:21:05,441 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/sv-benchmarks/c/eca-rers2012/Problem17_label11.c [2023-11-28 20:21:05,470 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/data/a00c489cf/f611fe948eef49088811acba96ace83c/FLAG5bc40b963 [2023-11-28 20:21:05,485 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/data/a00c489cf/f611fe948eef49088811acba96ace83c [2023-11-28 20:21:05,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:21:05,490 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:21:05,491 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:21:05,492 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:21:05,497 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:21:05,498 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:21:05" (1/1) ... [2023-11-28 20:21:05,499 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76e28c70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:05, skipping insertion in model container [2023-11-28 20:21:05,499 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:21:05" (1/1) ... [2023-11-28 20:21:05,626 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:21:05,845 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_51363b57-24fc-460d-89e5-8b69c6e9cf21/sv-benchmarks/c/eca-rers2012/Problem17_label11.c[8243,8256] [2023-11-28 20:21:06,371 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:21:06,382 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:21:06,407 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_51363b57-24fc-460d-89e5-8b69c6e9cf21/sv-benchmarks/c/eca-rers2012/Problem17_label11.c[8243,8256] [2023-11-28 20:21:06,734 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:21:06,753 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:21:06,754 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:06 WrapperNode [2023-11-28 20:21:06,754 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:21:06,755 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:21:06,755 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:21:06,755 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:21:06,763 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:06" (1/1) ... [2023-11-28 20:21:06,801 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:06" (1/1) ... [2023-11-28 20:21:07,036 INFO L138 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2612 [2023-11-28 20:21:07,037 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:21:07,037 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:21:07,037 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:21:07,038 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:21:07,049 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:06" (1/1) ... [2023-11-28 20:21:07,050 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:06" (1/1) ... [2023-11-28 20:21:07,087 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:06" (1/1) ... [2023-11-28 20:21:07,249 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]. [2023-11-28 20:21:07,249 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:06" (1/1) ... [2023-11-28 20:21:07,249 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:06" (1/1) ... [2023-11-28 20:21:07,349 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:06" (1/1) ... [2023-11-28 20:21:07,368 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:06" (1/1) ... [2023-11-28 20:21:07,380 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:06" (1/1) ... [2023-11-28 20:21:07,389 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:06" (1/1) ... [2023-11-28 20:21:07,411 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:21:07,412 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:21:07,412 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:21:07,412 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:21:07,413 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:06" (1/1) ... [2023-11-28 20:21:07,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:21:07,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:07,439 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:21:07,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:21:07,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:21:07,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 20:21:07,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:21:07,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:21:07,533 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:21:07,535 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:21:11,116 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:21:11,163 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:21:11,163 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-28 20:21:11,164 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:21:11 BoogieIcfgContainer [2023-11-28 20:21:11,164 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:21:11,166 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:21:11,166 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:21:11,169 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:21:11,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:21:05" (1/3) ... [2023-11-28 20:21:11,170 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61fd3b9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:21:11, skipping insertion in model container [2023-11-28 20:21:11,170 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:06" (2/3) ... [2023-11-28 20:21:11,170 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61fd3b9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:21:11, skipping insertion in model container [2023-11-28 20:21:11,170 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:21:11" (3/3) ... [2023-11-28 20:21:11,172 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label11.c [2023-11-28 20:21:11,186 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:21:11,186 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 20:21:11,240 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:21:11,245 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;@4907797, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:21:11,245 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-28 20:21:11,252 INFO L276 IsEmpty]: Start isEmpty. Operand has 528 states, 526 states have (on average 1.9011406844106464) internal successors, (1000), 527 states have internal predecessors, (1000), 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) [2023-11-28 20:21:11,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-28 20:21:11,258 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:11,259 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] [2023-11-28 20:21:11,260 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:11,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:11,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1068990856, now seen corresponding path program 1 times [2023-11-28 20:21:11,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:11,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380279586] [2023-11-28 20:21:11,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:11,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:11,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:11,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:11,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380279586] [2023-11-28 20:21:11,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380279586] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:11,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:11,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:21:11,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079426642] [2023-11-28 20:21:11,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:11,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-28 20:21:11,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:11,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-28 20:21:11,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 20:21:11,463 INFO L87 Difference]: Start difference. First operand has 528 states, 526 states have (on average 1.9011406844106464) internal successors, (1000), 527 states have internal predecessors, (1000), 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 27.5) internal successors, (55), 2 states have internal predecessors, (55), 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) [2023-11-28 20:21:11,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:11,531 INFO L93 Difference]: Finished difference Result 1055 states and 1999 transitions. [2023-11-28 20:21:11,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-28 20:21:11,533 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 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 55 [2023-11-28 20:21:11,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:11,550 INFO L225 Difference]: With dead ends: 1055 [2023-11-28 20:21:11,550 INFO L226 Difference]: Without dead ends: 526 [2023-11-28 20:21:11,556 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 [2023-11-28 20:21:11,559 INFO L413 NwaCegarLoop]: 935 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, 935 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 [2023-11-28 20:21:11,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 935 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:21:11,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2023-11-28 20:21:11,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2023-11-28 20:21:11,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 525 states have (on average 1.7809523809523808) internal successors, (935), 525 states have internal predecessors, (935), 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) [2023-11-28 20:21:11,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 935 transitions. [2023-11-28 20:21:11,624 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 935 transitions. Word has length 55 [2023-11-28 20:21:11,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:11,624 INFO L495 AbstractCegarLoop]: Abstraction has 526 states and 935 transitions. [2023-11-28 20:21:11,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 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) [2023-11-28 20:21:11,625 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 935 transitions. [2023-11-28 20:21:11,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-28 20:21:11,627 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:11,627 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] [2023-11-28 20:21:11,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 20:21:11,627 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:11,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:11,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1136734266, now seen corresponding path program 1 times [2023-11-28 20:21:11,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:11,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291089354] [2023-11-28 20:21:11,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:11,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:11,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:11,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:11,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:11,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291089354] [2023-11-28 20:21:11,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291089354] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:11,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:11,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:21:11,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192422180] [2023-11-28 20:21:11,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:11,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:21:11,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:11,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:21:11,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:21:11,798 INFO L87 Difference]: Start difference. First operand 526 states and 935 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 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) [2023-11-28 20:21:14,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:14,477 INFO L93 Difference]: Finished difference Result 1499 states and 2693 transitions. [2023-11-28 20:21:14,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:21:14,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 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 55 [2023-11-28 20:21:14,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:14,485 INFO L225 Difference]: With dead ends: 1499 [2023-11-28 20:21:14,486 INFO L226 Difference]: Without dead ends: 974 [2023-11-28 20:21:14,487 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 [2023-11-28 20:21:14,488 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 418 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 1666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:14,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 495 Invalid, 1666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-28 20:21:14,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2023-11-28 20:21:14,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 971. [2023-11-28 20:21:14,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.5082474226804123) internal successors, (1463), 970 states have internal predecessors, (1463), 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) [2023-11-28 20:21:14,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1463 transitions. [2023-11-28 20:21:14,520 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1463 transitions. Word has length 55 [2023-11-28 20:21:14,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:14,520 INFO L495 AbstractCegarLoop]: Abstraction has 971 states and 1463 transitions. [2023-11-28 20:21:14,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 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) [2023-11-28 20:21:14,521 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1463 transitions. [2023-11-28 20:21:14,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-28 20:21:14,525 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:14,525 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:14,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 20:21:14,526 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:14,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:14,527 INFO L85 PathProgramCache]: Analyzing trace with hash -575186586, now seen corresponding path program 1 times [2023-11-28 20:21:14,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:14,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505848239] [2023-11-28 20:21:14,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:14,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:14,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:14,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505848239] [2023-11-28 20:21:14,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505848239] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:14,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:14,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:21:14,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41425915] [2023-11-28 20:21:14,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:14,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:21:14,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:14,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:21:14,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:21:14,814 INFO L87 Difference]: Start difference. First operand 971 states and 1463 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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) [2023-11-28 20:21:17,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:17,664 INFO L93 Difference]: Finished difference Result 2813 states and 4241 transitions. [2023-11-28 20:21:17,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:21:17,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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 125 [2023-11-28 20:21:17,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:17,673 INFO L225 Difference]: With dead ends: 2813 [2023-11-28 20:21:17,673 INFO L226 Difference]: Without dead ends: 1843 [2023-11-28 20:21:17,675 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 [2023-11-28 20:21:17,677 INFO L413 NwaCegarLoop]: 851 mSDtfsCounter, 435 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 1698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:17,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 918 Invalid, 1698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1284 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-28 20:21:17,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2023-11-28 20:21:17,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 1841. [2023-11-28 20:21:17,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.3603260869565217) internal successors, (2503), 1840 states have internal predecessors, (2503), 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) [2023-11-28 20:21:17,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2503 transitions. [2023-11-28 20:21:17,713 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2503 transitions. Word has length 125 [2023-11-28 20:21:17,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:17,714 INFO L495 AbstractCegarLoop]: Abstraction has 1841 states and 2503 transitions. [2023-11-28 20:21:17,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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) [2023-11-28 20:21:17,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2503 transitions. [2023-11-28 20:21:17,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-11-28 20:21:17,719 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:17,719 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:17,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 20:21:17,720 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:17,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:17,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1121406025, now seen corresponding path program 1 times [2023-11-28 20:21:17,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:17,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909980570] [2023-11-28 20:21:17,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:17,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:17,887 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:17,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:17,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909980570] [2023-11-28 20:21:17,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909980570] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:17,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:17,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:21:17,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574844802] [2023-11-28 20:21:17,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:17,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:21:17,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:17,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:21:17,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:21:17,891 INFO L87 Difference]: Start difference. First operand 1841 states and 2503 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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) [2023-11-28 20:21:20,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:20,171 INFO L93 Difference]: Finished difference Result 5394 states and 7325 transitions. [2023-11-28 20:21:20,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:21:20,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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 147 [2023-11-28 20:21:20,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:20,184 INFO L225 Difference]: With dead ends: 5394 [2023-11-28 20:21:20,184 INFO L226 Difference]: Without dead ends: 2700 [2023-11-28 20:21:20,188 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 [2023-11-28 20:21:20,190 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 368 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:20,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 589 Invalid, 1630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-28 20:21:20,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2700 states. [2023-11-28 20:21:20,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2700 to 2700. [2023-11-28 20:21:20,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2700 states, 2699 states have (on average 1.1919229344201556) internal successors, (3217), 2699 states have internal predecessors, (3217), 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) [2023-11-28 20:21:20,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2700 states to 2700 states and 3217 transitions. [2023-11-28 20:21:20,258 INFO L78 Accepts]: Start accepts. Automaton has 2700 states and 3217 transitions. Word has length 147 [2023-11-28 20:21:20,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:20,259 INFO L495 AbstractCegarLoop]: Abstraction has 2700 states and 3217 transitions. [2023-11-28 20:21:20,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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) [2023-11-28 20:21:20,260 INFO L276 IsEmpty]: Start isEmpty. Operand 2700 states and 3217 transitions. [2023-11-28 20:21:20,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-28 20:21:20,264 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:20,264 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, 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] [2023-11-28 20:21:20,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-28 20:21:20,265 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:20,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:20,265 INFO L85 PathProgramCache]: Analyzing trace with hash -2101488803, now seen corresponding path program 1 times [2023-11-28 20:21:20,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:20,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375237048] [2023-11-28 20:21:20,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:20,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:20,544 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:20,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:20,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375237048] [2023-11-28 20:21:20,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375237048] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:20,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:20,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:21:20,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526605572] [2023-11-28 20:21:20,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:20,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:21:20,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:20,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:21:20,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:21:20,549 INFO L87 Difference]: Start difference. First operand 2700 states and 3217 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2023-11-28 20:21:22,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:22,439 INFO L93 Difference]: Finished difference Result 7107 states and 8597 transitions. [2023-11-28 20:21:22,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:21:22,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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 207 [2023-11-28 20:21:22,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:22,457 INFO L225 Difference]: With dead ends: 7107 [2023-11-28 20:21:22,457 INFO L226 Difference]: Without dead ends: 4408 [2023-11-28 20:21:22,460 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 [2023-11-28 20:21:22,461 INFO L413 NwaCegarLoop]: 724 mSDtfsCounter, 496 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:22,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 781 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1137 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-28 20:21:22,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4408 states. [2023-11-28 20:21:22,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4408 to 4408. [2023-11-28 20:21:22,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4408 states, 4407 states have (on average 1.1706376219650556) internal successors, (5159), 4407 states have internal predecessors, (5159), 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) [2023-11-28 20:21:22,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4408 states to 4408 states and 5159 transitions. [2023-11-28 20:21:22,533 INFO L78 Accepts]: Start accepts. Automaton has 4408 states and 5159 transitions. Word has length 207 [2023-11-28 20:21:22,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:22,533 INFO L495 AbstractCegarLoop]: Abstraction has 4408 states and 5159 transitions. [2023-11-28 20:21:22,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2023-11-28 20:21:22,534 INFO L276 IsEmpty]: Start isEmpty. Operand 4408 states and 5159 transitions. [2023-11-28 20:21:22,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-11-28 20:21:22,536 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:22,536 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, 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] [2023-11-28 20:21:22,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-28 20:21:22,536 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:22,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:22,537 INFO L85 PathProgramCache]: Analyzing trace with hash 876003032, now seen corresponding path program 1 times [2023-11-28 20:21:22,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:22,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665750959] [2023-11-28 20:21:22,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:22,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:22,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-28 20:21:22,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:22,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665750959] [2023-11-28 20:21:22,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665750959] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:22,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:22,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:21:22,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665998601] [2023-11-28 20:21:22,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:22,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:21:22,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:22,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:21:22,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:21:22,803 INFO L87 Difference]: Start difference. First operand 4408 states and 5159 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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) [2023-11-28 20:21:25,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:25,069 INFO L93 Difference]: Finished difference Result 10935 states and 12969 transitions. [2023-11-28 20:21:25,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:21:25,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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 209 [2023-11-28 20:21:25,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:25,098 INFO L225 Difference]: With dead ends: 10935 [2023-11-28 20:21:25,098 INFO L226 Difference]: Without dead ends: 6527 [2023-11-28 20:21:25,104 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 [2023-11-28 20:21:25,105 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 394 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:25,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 442 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-28 20:21:25,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6527 states. [2023-11-28 20:21:25,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6527 to 4381. [2023-11-28 20:21:25,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4381 states, 4380 states have (on average 1.1684931506849314) internal successors, (5118), 4380 states have internal predecessors, (5118), 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) [2023-11-28 20:21:25,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4381 states to 4381 states and 5118 transitions. [2023-11-28 20:21:25,185 INFO L78 Accepts]: Start accepts. Automaton has 4381 states and 5118 transitions. Word has length 209 [2023-11-28 20:21:25,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:25,186 INFO L495 AbstractCegarLoop]: Abstraction has 4381 states and 5118 transitions. [2023-11-28 20:21:25,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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) [2023-11-28 20:21:25,186 INFO L276 IsEmpty]: Start isEmpty. Operand 4381 states and 5118 transitions. [2023-11-28 20:21:25,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2023-11-28 20:21:25,190 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:25,191 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, 2, 2, 2, 2, 2, 2, 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] [2023-11-28 20:21:25,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-28 20:21:25,191 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:25,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:25,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1438261346, now seen corresponding path program 1 times [2023-11-28 20:21:25,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:25,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490583503] [2023-11-28 20:21:25,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:25,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:25,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:25,417 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-11-28 20:21:25,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:25,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490583503] [2023-11-28 20:21:25,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490583503] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:25,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:25,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:21:25,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807737881] [2023-11-28 20:21:25,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:25,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:21:25,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:25,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:21:25,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:21:25,420 INFO L87 Difference]: Start difference. First operand 4381 states and 5118 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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) [2023-11-28 20:21:27,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:27,423 INFO L93 Difference]: Finished difference Result 10044 states and 11705 transitions. [2023-11-28 20:21:27,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:21:27,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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 275 [2023-11-28 20:21:27,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:27,444 INFO L225 Difference]: With dead ends: 10044 [2023-11-28 20:21:27,444 INFO L226 Difference]: Without dead ends: 5664 [2023-11-28 20:21:27,448 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 [2023-11-28 20:21:27,449 INFO L413 NwaCegarLoop]: 831 mSDtfsCounter, 380 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 1343 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:27,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 891 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1343 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-28 20:21:27,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5664 states. [2023-11-28 20:21:27,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5664 to 5233. [2023-11-28 20:21:27,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5233 states, 5232 states have (on average 1.1588302752293578) internal successors, (6063), 5232 states have internal predecessors, (6063), 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) [2023-11-28 20:21:27,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5233 states to 5233 states and 6063 transitions. [2023-11-28 20:21:27,524 INFO L78 Accepts]: Start accepts. Automaton has 5233 states and 6063 transitions. Word has length 275 [2023-11-28 20:21:27,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:27,525 INFO L495 AbstractCegarLoop]: Abstraction has 5233 states and 6063 transitions. [2023-11-28 20:21:27,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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) [2023-11-28 20:21:27,525 INFO L276 IsEmpty]: Start isEmpty. Operand 5233 states and 6063 transitions. [2023-11-28 20:21:27,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2023-11-28 20:21:27,528 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:27,528 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, 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:27,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-28 20:21:27,529 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:27,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:27,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1891416827, now seen corresponding path program 1 times [2023-11-28 20:21:27,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:27,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089253194] [2023-11-28 20:21:27,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:27,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:27,873 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 294 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-28 20:21:27,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:27,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089253194] [2023-11-28 20:21:27,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089253194] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:27,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:27,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:21:27,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464788385] [2023-11-28 20:21:27,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:27,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:21:27,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:27,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:21:27,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:21:27,877 INFO L87 Difference]: Start difference. First operand 5233 states and 6063 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2023-11-28 20:21:30,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:30,401 INFO L93 Difference]: Finished difference Result 13048 states and 15221 transitions. [2023-11-28 20:21:30,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:21:30,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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 287 [2023-11-28 20:21:30,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:30,429 INFO L225 Difference]: With dead ends: 13048 [2023-11-28 20:21:30,429 INFO L226 Difference]: Without dead ends: 6941 [2023-11-28 20:21:30,436 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 [2023-11-28 20:21:30,437 INFO L413 NwaCegarLoop]: 584 mSDtfsCounter, 493 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:30,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 627 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 1239 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-28 20:21:30,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6941 states. [2023-11-28 20:21:30,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6941 to 6511. [2023-11-28 20:21:30,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6511 states, 6510 states have (on average 1.152073732718894) internal successors, (7500), 6510 states have internal predecessors, (7500), 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) [2023-11-28 20:21:30,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6511 states to 6511 states and 7500 transitions. [2023-11-28 20:21:30,609 INFO L78 Accepts]: Start accepts. Automaton has 6511 states and 7500 transitions. Word has length 287 [2023-11-28 20:21:30,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:30,610 INFO L495 AbstractCegarLoop]: Abstraction has 6511 states and 7500 transitions. [2023-11-28 20:21:30,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2023-11-28 20:21:30,611 INFO L276 IsEmpty]: Start isEmpty. Operand 6511 states and 7500 transitions. [2023-11-28 20:21:30,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2023-11-28 20:21:30,617 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:30,617 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:30,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-28 20:21:30,618 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:30,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:30,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1122784544, now seen corresponding path program 1 times [2023-11-28 20:21:30,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:30,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079936565] [2023-11-28 20:21:30,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:30,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:30,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:30,965 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 294 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-11-28 20:21:30,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:30,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079936565] [2023-11-28 20:21:30,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079936565] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:30,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:30,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:21:30,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093477578] [2023-11-28 20:21:30,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:30,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:21:30,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:30,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:21:30,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:21:30,968 INFO L87 Difference]: Start difference. First operand 6511 states and 7500 transitions. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 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) [2023-11-28 20:21:33,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:33,084 INFO L93 Difference]: Finished difference Result 16009 states and 18476 transitions. [2023-11-28 20:21:33,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:21:33,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 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 310 [2023-11-28 20:21:33,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:33,099 INFO L225 Difference]: With dead ends: 16009 [2023-11-28 20:21:33,099 INFO L226 Difference]: Without dead ends: 9499 [2023-11-28 20:21:33,104 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 [2023-11-28 20:21:33,105 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 415 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:33,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 335 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-28 20:21:33,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9499 states. [2023-11-28 20:21:33,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9499 to 8643. [2023-11-28 20:21:33,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8643 states, 8642 states have (on average 1.1545938440175885) internal successors, (9978), 8642 states have internal predecessors, (9978), 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) [2023-11-28 20:21:33,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8643 states to 8643 states and 9978 transitions. [2023-11-28 20:21:33,270 INFO L78 Accepts]: Start accepts. Automaton has 8643 states and 9978 transitions. Word has length 310 [2023-11-28 20:21:33,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:33,271 INFO L495 AbstractCegarLoop]: Abstraction has 8643 states and 9978 transitions. [2023-11-28 20:21:33,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 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) [2023-11-28 20:21:33,272 INFO L276 IsEmpty]: Start isEmpty. Operand 8643 states and 9978 transitions. [2023-11-28 20:21:33,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2023-11-28 20:21:33,281 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:33,281 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, 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] [2023-11-28 20:21:33,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-28 20:21:33,282 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:33,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:33,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1500737059, now seen corresponding path program 1 times [2023-11-28 20:21:33,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:33,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130627963] [2023-11-28 20:21:33,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:33,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:33,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:33,999 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 314 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:33,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:33,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130627963] [2023-11-28 20:21:33,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130627963] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:21:33,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522988655] [2023-11-28 20:21:34,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:34,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:34,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:34,007 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:34,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:21:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:34,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-28 20:21:34,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 250 proven. 82 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-28 20:21:34,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:21:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 250 proven. 82 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-28 20:21:35,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522988655] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:21:35,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:21:35,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2023-11-28 20:21:35,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814216397] [2023-11-28 20:21:35,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:21:35,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-28 20:21:35,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:35,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-28 20:21:35,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-28 20:21:35,916 INFO L87 Difference]: Start difference. First operand 8643 states and 9978 transitions. Second operand has 9 states, 9 states have (on average 84.88888888888889) internal successors, (764), 9 states have internal predecessors, (764), 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) [2023-11-28 20:21:51,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:51,568 INFO L93 Difference]: Finished difference Result 56144 states and 64618 transitions. [2023-11-28 20:21:51,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-28 20:21:51,569 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 84.88888888888889) internal successors, (764), 9 states have internal predecessors, (764), 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 315 [2023-11-28 20:21:51,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:51,626 INFO L225 Difference]: With dead ends: 56144 [2023-11-28 20:21:51,626 INFO L226 Difference]: Without dead ends: 44097 [2023-11-28 20:21:51,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 639 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2023-11-28 20:21:51,636 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 9611 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 11190 mSolverCounterSat, 3002 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9611 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 14192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3002 IncrementalHoareTripleChecker+Valid, 11190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:51,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9611 Valid, 483 Invalid, 14192 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3002 Valid, 11190 Invalid, 0 Unknown, 0 Unchecked, 14.9s Time] [2023-11-28 20:21:51,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44097 states. [2023-11-28 20:21:52,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44097 to 37617. [2023-11-28 20:21:52,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37617 states, 37616 states have (on average 1.1386112292641428) internal successors, (42830), 37616 states have internal predecessors, (42830), 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) [2023-11-28 20:21:52,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37617 states to 37617 states and 42830 transitions. [2023-11-28 20:21:52,133 INFO L78 Accepts]: Start accepts. Automaton has 37617 states and 42830 transitions. Word has length 315 [2023-11-28 20:21:52,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:52,133 INFO L495 AbstractCegarLoop]: Abstraction has 37617 states and 42830 transitions. [2023-11-28 20:21:52,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 84.88888888888889) internal successors, (764), 9 states have internal predecessors, (764), 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) [2023-11-28 20:21:52,133 INFO L276 IsEmpty]: Start isEmpty. Operand 37617 states and 42830 transitions. [2023-11-28 20:21:52,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2023-11-28 20:21:52,143 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:52,144 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, 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, 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] [2023-11-28 20:21:52,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 20:21:52,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-28 20:21:52,345 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:52,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:52,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1961087356, now seen corresponding path program 1 times [2023-11-28 20:21:52,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:52,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871636031] [2023-11-28 20:21:52,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:52,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:52,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:53,327 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 541 proven. 80 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-28 20:21:53,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:53,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871636031] [2023-11-28 20:21:53,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871636031] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:21:53,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666565881] [2023-11-28 20:21:53,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:53,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:53,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:53,329 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:53,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:21:53,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:53,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:21:53,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 621 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-28 20:21:53,949 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:21:53,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666565881] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:53,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:21:53,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-11-28 20:21:53,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236615649] [2023-11-28 20:21:53,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:53,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:21:53,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:53,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:21:53,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:21:53,951 INFO L87 Difference]: Start difference. First operand 37617 states and 42830 transitions. Second operand has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 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) [2023-11-28 20:21:56,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:56,800 INFO L93 Difference]: Finished difference Result 82883 states and 94293 transitions. [2023-11-28 20:21:56,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:21:56,800 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 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 397 [2023-11-28 20:21:56,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:56,861 INFO L225 Difference]: With dead ends: 82883 [2023-11-28 20:21:56,861 INFO L226 Difference]: Without dead ends: 45692 [2023-11-28 20:21:56,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:21:56,885 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 812 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 2142 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 2478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 2142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:56,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [812 Valid, 340 Invalid, 2478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 2142 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-28 20:21:56,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45692 states. [2023-11-28 20:21:57,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45692 to 44417. [2023-11-28 20:21:57,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44417 states, 44416 states have (on average 1.1227260446685878) internal successors, (49867), 44416 states have internal predecessors, (49867), 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) [2023-11-28 20:21:57,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44417 states to 44417 states and 49867 transitions. [2023-11-28 20:21:57,437 INFO L78 Accepts]: Start accepts. Automaton has 44417 states and 49867 transitions. Word has length 397 [2023-11-28 20:21:57,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:57,438 INFO L495 AbstractCegarLoop]: Abstraction has 44417 states and 49867 transitions. [2023-11-28 20:21:57,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 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) [2023-11-28 20:21:57,438 INFO L276 IsEmpty]: Start isEmpty. Operand 44417 states and 49867 transitions. [2023-11-28 20:21:57,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2023-11-28 20:21:57,451 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:57,452 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2023-11-28 20:21:57,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 20:21:57,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:57,654 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:57,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:57,654 INFO L85 PathProgramCache]: Analyzing trace with hash -112265035, now seen corresponding path program 1 times [2023-11-28 20:21:57,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:57,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192528244] [2023-11-28 20:21:57,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:57,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:58,154 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 532 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-11-28 20:21:58,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:58,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192528244] [2023-11-28 20:21:58,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192528244] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:58,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:58,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:21:58,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837933999] [2023-11-28 20:21:58,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:58,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:21:58,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:58,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:21:58,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:21:58,157 INFO L87 Difference]: Start difference. First operand 44417 states and 49867 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 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) [2023-11-28 20:22:00,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:22:00,691 INFO L93 Difference]: Finished difference Result 102478 states and 115556 transitions. [2023-11-28 20:22:00,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:22:00,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 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 445 [2023-11-28 20:22:00,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:22:00,765 INFO L225 Difference]: With dead ends: 102478 [2023-11-28 20:22:00,765 INFO L226 Difference]: Without dead ends: 58912 [2023-11-28 20:22:00,796 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 [2023-11-28 20:22:00,797 INFO L413 NwaCegarLoop]: 769 mSDtfsCounter, 300 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1338 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:22:00,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 821 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1338 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-28 20:22:00,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58912 states. [2023-11-28 20:22:01,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58912 to 54211. [2023-11-28 20:22:01,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54211 states, 54210 states have (on average 1.1144438295517431) internal successors, (60414), 54210 states have internal predecessors, (60414), 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) [2023-11-28 20:22:01,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54211 states to 54211 states and 60414 transitions. [2023-11-28 20:22:01,511 INFO L78 Accepts]: Start accepts. Automaton has 54211 states and 60414 transitions. Word has length 445 [2023-11-28 20:22:01,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:22:01,511 INFO L495 AbstractCegarLoop]: Abstraction has 54211 states and 60414 transitions. [2023-11-28 20:22:01,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 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) [2023-11-28 20:22:01,511 INFO L276 IsEmpty]: Start isEmpty. Operand 54211 states and 60414 transitions. [2023-11-28 20:22:01,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2023-11-28 20:22:01,524 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:22:01,525 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, 4, 4, 4, 4, 4, 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, 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] [2023-11-28 20:22:01,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-28 20:22:01,525 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:22:01,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:22:01,526 INFO L85 PathProgramCache]: Analyzing trace with hash -553985484, now seen corresponding path program 1 times [2023-11-28 20:22:01,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:22:01,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914037138] [2023-11-28 20:22:01,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:01,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:22:01,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:01,985 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 543 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2023-11-28 20:22:01,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:22:01,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914037138] [2023-11-28 20:22:01,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914037138] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:22:01,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:22:01,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:22:01,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582855894] [2023-11-28 20:22:01,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:22:01,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:22:01,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:22:01,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:22:01,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:22:01,988 INFO L87 Difference]: Start difference. First operand 54211 states and 60414 transitions. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 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) [2023-11-28 20:22:04,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:22:04,069 INFO L93 Difference]: Finished difference Result 110115 states and 123122 transitions. [2023-11-28 20:22:04,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:22:04,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 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 478 [2023-11-28 20:22:04,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:22:04,136 INFO L225 Difference]: With dead ends: 110115 [2023-11-28 20:22:04,136 INFO L226 Difference]: Without dead ends: 56755 [2023-11-28 20:22:04,155 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 [2023-11-28 20:22:04,155 INFO L413 NwaCegarLoop]: 727 mSDtfsCounter, 278 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-28 20:22:04,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 789 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-28 20:22:04,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56755 states. [2023-11-28 20:22:04,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56755 to 56755. [2023-11-28 20:22:04,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56755 states, 56754 states have (on average 1.1015963632519294) internal successors, (62520), 56754 states have internal predecessors, (62520), 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) [2023-11-28 20:22:05,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56755 states to 56755 states and 62520 transitions. [2023-11-28 20:22:05,036 INFO L78 Accepts]: Start accepts. Automaton has 56755 states and 62520 transitions. Word has length 478 [2023-11-28 20:22:05,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:22:05,037 INFO L495 AbstractCegarLoop]: Abstraction has 56755 states and 62520 transitions. [2023-11-28 20:22:05,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 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) [2023-11-28 20:22:05,037 INFO L276 IsEmpty]: Start isEmpty. Operand 56755 states and 62520 transitions. [2023-11-28 20:22:05,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2023-11-28 20:22:05,045 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:22:05,046 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, 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, 2, 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] [2023-11-28 20:22:05,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-28 20:22:05,046 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:22:05,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:22:05,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1819847448, now seen corresponding path program 1 times [2023-11-28 20:22:05,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:22:05,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469619471] [2023-11-28 20:22:05,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:05,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:22:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:05,811 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 440 proven. 82 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-11-28 20:22:05,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:22:05,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469619471] [2023-11-28 20:22:05,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469619471] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:22:05,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932081644] [2023-11-28 20:22:05,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:05,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:22:05,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:22:05,815 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:22:05,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 20:22:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:06,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 20:22:06,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:22:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 440 proven. 82 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-11-28 20:22:06,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:22:06,573 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 522 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-11-28 20:22:06,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932081644] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:22:06,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:22:06,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2023-11-28 20:22:06,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023340110] [2023-11-28 20:22:06,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:22:06,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:22:06,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:22:06,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:22:06,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:22:06,577 INFO L87 Difference]: Start difference. First operand 56755 states and 62520 transitions. Second operand has 4 states, 4 states have (on average 88.75) internal successors, (355), 3 states have internal predecessors, (355), 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) [2023-11-28 20:22:10,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:22:10,306 INFO L93 Difference]: Finished difference Result 136896 states and 150799 transitions. [2023-11-28 20:22:10,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:22:10,307 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 88.75) internal successors, (355), 3 states have internal predecessors, (355), 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 479 [2023-11-28 20:22:10,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:22:10,484 INFO L225 Difference]: With dead ends: 136896 [2023-11-28 20:22:10,484 INFO L226 Difference]: Without dead ends: 80139 [2023-11-28 20:22:10,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 959 GetRequests, 955 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:22:10,501 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 866 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 2198 mSolverCounterSat, 664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 2862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 664 IncrementalHoareTripleChecker+Valid, 2198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:22:10,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [866 Valid, 123 Invalid, 2862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [664 Valid, 2198 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-28 20:22:10,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80139 states. [2023-11-28 20:22:11,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80139 to 76733. [2023-11-28 20:22:11,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76733 states, 76732 states have (on average 1.0854011364228744) internal successors, (83285), 76732 states have internal predecessors, (83285), 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) [2023-11-28 20:22:11,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76733 states to 76733 states and 83285 transitions. [2023-11-28 20:22:11,793 INFO L78 Accepts]: Start accepts. Automaton has 76733 states and 83285 transitions. Word has length 479 [2023-11-28 20:22:11,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:22:11,793 INFO L495 AbstractCegarLoop]: Abstraction has 76733 states and 83285 transitions. [2023-11-28 20:22:11,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 88.75) internal successors, (355), 3 states have internal predecessors, (355), 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) [2023-11-28 20:22:11,794 INFO L276 IsEmpty]: Start isEmpty. Operand 76733 states and 83285 transitions. [2023-11-28 20:22:11,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2023-11-28 20:22:11,805 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:22:11,805 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2023-11-28 20:22:11,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 20:22:12,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-28 20:22:12,006 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:22:12,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:22:12,007 INFO L85 PathProgramCache]: Analyzing trace with hash -440305533, now seen corresponding path program 1 times [2023-11-28 20:22:12,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:22:12,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122816825] [2023-11-28 20:22:12,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:12,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:22:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:12,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 794 proven. 72 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-11-28 20:22:12,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:22:12,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122816825] [2023-11-28 20:22:12,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122816825] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:22:12,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737910416] [2023-11-28 20:22:12,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:12,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:22:12,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:22:12,891 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:22:12,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 20:22:13,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:13,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:22:13,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:22:13,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 866 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-11-28 20:22:13,570 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:22:13,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737910416] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:22:13,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:22:13,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-11-28 20:22:13,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267950911] [2023-11-28 20:22:13,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:22:13,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:22:13,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:22:13,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:22:13,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:22:13,573 INFO L87 Difference]: Start difference. First operand 76733 states and 83285 transitions. Second operand has 4 states, 4 states have (on average 92.5) internal successors, (370), 4 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) [2023-11-28 20:22:16,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:22:16,678 INFO L93 Difference]: Finished difference Result 156874 states and 170215 transitions. [2023-11-28 20:22:16,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:22:16,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 92.5) internal successors, (370), 4 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 494 [2023-11-28 20:22:16,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:22:16,745 INFO L225 Difference]: With dead ends: 156874 [2023-11-28 20:22:16,745 INFO L226 Difference]: Without dead ends: 80992 [2023-11-28 20:22:16,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:22:16,761 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 853 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 2043 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 2319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 2043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:22:16,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [853 Valid, 266 Invalid, 2319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 2043 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-28 20:22:16,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80992 states. [2023-11-28 20:22:17,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80992 to 80141. [2023-11-28 20:22:17,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80141 states, 80140 states have (on average 1.0832043923134516) internal successors, (86808), 80140 states have internal predecessors, (86808), 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) [2023-11-28 20:22:17,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80141 states to 80141 states and 86808 transitions. [2023-11-28 20:22:17,572 INFO L78 Accepts]: Start accepts. Automaton has 80141 states and 86808 transitions. Word has length 494 [2023-11-28 20:22:17,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:22:17,572 INFO L495 AbstractCegarLoop]: Abstraction has 80141 states and 86808 transitions. [2023-11-28 20:22:17,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.5) internal successors, (370), 4 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) [2023-11-28 20:22:17,573 INFO L276 IsEmpty]: Start isEmpty. Operand 80141 states and 86808 transitions. [2023-11-28 20:22:17,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2023-11-28 20:22:17,583 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:22:17,583 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, 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, 3, 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] [2023-11-28 20:22:17,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 20:22:17,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-28 20:22:17,784 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:22:17,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:22:17,784 INFO L85 PathProgramCache]: Analyzing trace with hash 563707671, now seen corresponding path program 1 times [2023-11-28 20:22:17,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:22:17,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457597114] [2023-11-28 20:22:17,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:17,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:22:17,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:18,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 823 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-11-28 20:22:18,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:22:18,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457597114] [2023-11-28 20:22:18,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457597114] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:22:18,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:22:18,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:22:18,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382676661] [2023-11-28 20:22:18,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:22:18,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:22:18,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:22:18,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:22:18,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:22:18,367 INFO L87 Difference]: Start difference. First operand 80141 states and 86808 transitions. Second operand has 4 states, 4 states have (on average 98.5) internal successors, (394), 4 states have internal predecessors, (394), 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) [2023-11-28 20:22:22,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:22:22,356 INFO L93 Difference]: Finished difference Result 201616 states and 218546 transitions. [2023-11-28 20:22:22,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:22:22,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 98.5) internal successors, (394), 4 states have internal predecessors, (394), 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 556 [2023-11-28 20:22:22,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:22:22,579 INFO L225 Difference]: With dead ends: 201616 [2023-11-28 20:22:22,579 INFO L226 Difference]: Without dead ends: 122326 [2023-11-28 20:22:22,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:22:22,600 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 763 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 2841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:22:22,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [763 Valid, 179 Invalid, 2841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 2437 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-28 20:22:22,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122326 states. [2023-11-28 20:22:23,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122326 to 105717. [2023-11-28 20:22:23,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105717 states, 105716 states have (on average 1.0820783987286693) internal successors, (114393), 105716 states have internal predecessors, (114393), 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) [2023-11-28 20:22:24,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105717 states to 105717 states and 114393 transitions. [2023-11-28 20:22:24,202 INFO L78 Accepts]: Start accepts. Automaton has 105717 states and 114393 transitions. Word has length 556 [2023-11-28 20:22:24,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:22:24,203 INFO L495 AbstractCegarLoop]: Abstraction has 105717 states and 114393 transitions. [2023-11-28 20:22:24,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 98.5) internal successors, (394), 4 states have internal predecessors, (394), 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) [2023-11-28 20:22:24,203 INFO L276 IsEmpty]: Start isEmpty. Operand 105717 states and 114393 transitions. [2023-11-28 20:22:24,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2023-11-28 20:22:24,221 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:22:24,222 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, 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, 3, 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] [2023-11-28 20:22:24,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-28 20:22:24,222 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:22:24,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:22:24,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1192051392, now seen corresponding path program 1 times [2023-11-28 20:22:24,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:22:24,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060561234] [2023-11-28 20:22:24,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:24,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:22:24,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1061 backedges. 800 proven. 0 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2023-11-28 20:22:24,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:22:24,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060561234] [2023-11-28 20:22:24,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060561234] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:22:24,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:22:24,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:22:24,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262966603] [2023-11-28 20:22:24,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:22:24,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:22:24,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:22:24,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:22:24,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:22:24,698 INFO L87 Difference]: Start difference. First operand 105717 states and 114393 transitions. Second operand has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 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) [2023-11-28 20:22:27,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:22:27,198 INFO L93 Difference]: Finished difference Result 231440 states and 251217 transitions. [2023-11-28 20:22:27,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:22:27,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 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 558 [2023-11-28 20:22:27,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:22:27,304 INFO L225 Difference]: With dead ends: 231440 [2023-11-28 20:22:27,304 INFO L226 Difference]: Without dead ends: 126574 [2023-11-28 20:22:27,334 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 [2023-11-28 20:22:27,335 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 311 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-28 20:22:27,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 290 Invalid, 1378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-28 20:22:27,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126574 states. [2023-11-28 20:22:28,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126574 to 124427. [2023-11-28 20:22:28,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124427 states, 124426 states have (on average 1.0736019802935077) internal successors, (133584), 124426 states have internal predecessors, (133584), 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) [2023-11-28 20:22:28,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124427 states to 124427 states and 133584 transitions. [2023-11-28 20:22:28,964 INFO L78 Accepts]: Start accepts. Automaton has 124427 states and 133584 transitions. Word has length 558 [2023-11-28 20:22:28,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:22:28,964 INFO L495 AbstractCegarLoop]: Abstraction has 124427 states and 133584 transitions. [2023-11-28 20:22:28,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 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) [2023-11-28 20:22:28,965 INFO L276 IsEmpty]: Start isEmpty. Operand 124427 states and 133584 transitions. [2023-11-28 20:22:28,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2023-11-28 20:22:28,981 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:22:28,981 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:22:28,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-28 20:22:28,982 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:22:28,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:22:28,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1873006250, now seen corresponding path program 1 times [2023-11-28 20:22:28,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:22:28,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840440985] [2023-11-28 20:22:28,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:28,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:22:29,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 562 proven. 73 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2023-11-28 20:22:29,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:22:29,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840440985] [2023-11-28 20:22:29,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840440985] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:22:29,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930939118] [2023-11-28 20:22:29,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:29,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:22:29,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:22:29,898 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:22:29,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 20:22:30,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:30,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-28 20:22:30,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:22:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 992 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-28 20:22:31,055 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:22:31,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930939118] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:22:31,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:22:31,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 7 [2023-11-28 20:22:31,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384393031] [2023-11-28 20:22:31,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:22:31,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:22:31,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:22:31,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:22:31,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:22:31,058 INFO L87 Difference]: Start difference. First operand 124427 states and 133584 transitions. Second operand has 5 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 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) [2023-11-28 20:22:35,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:22:35,401 INFO L93 Difference]: Finished difference Result 274848 states and 294615 transitions. [2023-11-28 20:22:35,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:22:35,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 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 575 [2023-11-28 20:22:35,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:22:35,545 INFO L225 Difference]: With dead ends: 274848 [2023-11-28 20:22:35,545 INFO L226 Difference]: Without dead ends: 151272 [2023-11-28 20:22:35,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 572 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:22:35,571 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 1058 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 2619 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 3066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 2619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:22:35,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1058 Valid, 276 Invalid, 3066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 2619 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-28 20:22:35,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151272 states. [2023-11-28 20:22:37,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151272 to 137651. [2023-11-28 20:22:37,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137651 states, 137650 states have (on average 1.071245913548856) internal successors, (147457), 137650 states have internal predecessors, (147457), 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) [2023-11-28 20:22:37,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137651 states to 137651 states and 147457 transitions. [2023-11-28 20:22:37,231 INFO L78 Accepts]: Start accepts. Automaton has 137651 states and 147457 transitions. Word has length 575 [2023-11-28 20:22:37,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:22:37,232 INFO L495 AbstractCegarLoop]: Abstraction has 137651 states and 147457 transitions. [2023-11-28 20:22:37,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 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) [2023-11-28 20:22:37,232 INFO L276 IsEmpty]: Start isEmpty. Operand 137651 states and 147457 transitions. [2023-11-28 20:22:37,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2023-11-28 20:22:37,240 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:22:37,241 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:22:37,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-28 20:22:37,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-28 20:22:37,441 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:22:37,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:22:37,442 INFO L85 PathProgramCache]: Analyzing trace with hash 2119902229, now seen corresponding path program 1 times [2023-11-28 20:22:37,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:22:37,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846737189] [2023-11-28 20:22:37,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:37,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:22:37,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:38,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 631 proven. 0 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2023-11-28 20:22:38,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:22:38,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846737189] [2023-11-28 20:22:38,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846737189] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:22:38,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:22:38,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:22:38,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77060450] [2023-11-28 20:22:38,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:22:38,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:22:38,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:22:38,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:22:38,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:22:38,061 INFO L87 Difference]: Start difference. First operand 137651 states and 147457 transitions. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 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) [2023-11-28 20:22:40,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:22:40,575 INFO L93 Difference]: Finished difference Result 280400 states and 300192 transitions. [2023-11-28 20:22:40,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:22:40,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 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 583 [2023-11-28 20:22:40,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:22:40,715 INFO L225 Difference]: With dead ends: 280400 [2023-11-28 20:22:40,715 INFO L226 Difference]: Without dead ends: 143175 [2023-11-28 20:22:40,930 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 [2023-11-28 20:22:40,930 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 352 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-28 20:22:40,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 289 Invalid, 1335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-28 20:22:41,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143175 states. [2023-11-28 20:22:42,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143175 to 141881. [2023-11-28 20:22:42,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141881 states, 141880 states have (on average 1.064441781787426) internal successors, (151023), 141880 states have internal predecessors, (151023), 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) [2023-11-28 20:22:42,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141881 states to 141881 states and 151023 transitions. [2023-11-28 20:22:42,706 INFO L78 Accepts]: Start accepts. Automaton has 141881 states and 151023 transitions. Word has length 583 [2023-11-28 20:22:42,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:22:42,707 INFO L495 AbstractCegarLoop]: Abstraction has 141881 states and 151023 transitions. [2023-11-28 20:22:42,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 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) [2023-11-28 20:22:42,707 INFO L276 IsEmpty]: Start isEmpty. Operand 141881 states and 151023 transitions. [2023-11-28 20:22:42,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2023-11-28 20:22:42,716 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:22:42,717 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:22:42,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-28 20:22:42,717 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:22:42,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:22:42,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1692442935, now seen corresponding path program 1 times [2023-11-28 20:22:42,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:22:42,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533736048] [2023-11-28 20:22:42,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:42,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:22:42,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 561 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-11-28 20:22:43,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:22:43,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533736048] [2023-11-28 20:22:43,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533736048] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:22:43,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:22:43,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:22:43,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20296111] [2023-11-28 20:22:43,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:22:43,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:22:43,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:22:43,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:22:43,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:22:43,579 INFO L87 Difference]: Start difference. First operand 141881 states and 151023 transitions. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 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) [2023-11-28 20:22:45,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:22:45,898 INFO L93 Difference]: Finished difference Result 282915 states and 301195 transitions. [2023-11-28 20:22:45,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:22:45,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 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 616 [2023-11-28 20:22:45,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:22:46,050 INFO L225 Difference]: With dead ends: 282915 [2023-11-28 20:22:46,050 INFO L226 Difference]: Without dead ends: 141885 [2023-11-28 20:22:46,114 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 [2023-11-28 20:22:46,115 INFO L413 NwaCegarLoop]: 716 mSDtfsCounter, 113 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:22:46,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 759 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-28 20:22:46,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141885 states. [2023-11-28 20:22:47,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141885 to 141031. [2023-11-28 20:22:47,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141031 states, 141030 states have (on average 1.0645323689995037) internal successors, (150131), 141030 states have internal predecessors, (150131), 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) [2023-11-28 20:22:48,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141031 states to 141031 states and 150131 transitions. [2023-11-28 20:22:48,060 INFO L78 Accepts]: Start accepts. Automaton has 141031 states and 150131 transitions. Word has length 616 [2023-11-28 20:22:48,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:22:48,061 INFO L495 AbstractCegarLoop]: Abstraction has 141031 states and 150131 transitions. [2023-11-28 20:22:48,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 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) [2023-11-28 20:22:48,061 INFO L276 IsEmpty]: Start isEmpty. Operand 141031 states and 150131 transitions. [2023-11-28 20:22:48,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2023-11-28 20:22:48,075 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:22:48,076 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:22:48,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-28 20:22:48,076 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:22:48,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:22:48,077 INFO L85 PathProgramCache]: Analyzing trace with hash -2146597188, now seen corresponding path program 1 times [2023-11-28 20:22:48,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:22:48,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781553947] [2023-11-28 20:22:48,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:48,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:22:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 415 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-11-28 20:22:48,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:22:48,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781553947] [2023-11-28 20:22:48,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781553947] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:22:48,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:22:48,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:22:48,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813265255] [2023-11-28 20:22:48,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:22:48,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:22:48,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:22:48,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:22:48,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:22:48,485 INFO L87 Difference]: Start difference. First operand 141031 states and 150131 transitions. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 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) [2023-11-28 20:22:51,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:22:51,285 INFO L93 Difference]: Finished difference Result 289317 states and 308164 transitions. [2023-11-28 20:22:51,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:22:51,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 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 617 [2023-11-28 20:22:51,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:22:51,459 INFO L225 Difference]: With dead ends: 289317 [2023-11-28 20:22:51,459 INFO L226 Difference]: Without dead ends: 148711 [2023-11-28 20:22:51,522 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 [2023-11-28 20:22:51,523 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 440 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:22:51,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 212 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-28 20:22:51,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148711 states. [2023-11-28 20:22:53,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148711 to 142740. [2023-11-28 20:22:53,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142740 states, 142739 states have (on average 1.0640609784291608) internal successors, (151883), 142739 states have internal predecessors, (151883), 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) [2023-11-28 20:22:53,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142740 states to 142740 states and 151883 transitions. [2023-11-28 20:22:53,339 INFO L78 Accepts]: Start accepts. Automaton has 142740 states and 151883 transitions. Word has length 617 [2023-11-28 20:22:53,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:22:53,339 INFO L495 AbstractCegarLoop]: Abstraction has 142740 states and 151883 transitions. [2023-11-28 20:22:53,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 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) [2023-11-28 20:22:53,340 INFO L276 IsEmpty]: Start isEmpty. Operand 142740 states and 151883 transitions. [2023-11-28 20:22:53,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 621 [2023-11-28 20:22:53,351 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:22:53,352 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, 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, 4, 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, 1, 1, 1, 1, 1, 1] [2023-11-28 20:22:53,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-28 20:22:53,352 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:22:53,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:22:53,353 INFO L85 PathProgramCache]: Analyzing trace with hash 422834606, now seen corresponding path program 1 times [2023-11-28 20:22:53,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:22:53,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119609572] [2023-11-28 20:22:53,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:53,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:22:53,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1603 backedges. 1143 proven. 0 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2023-11-28 20:22:54,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:22:54,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119609572] [2023-11-28 20:22:54,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119609572] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:22:54,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:22:54,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:22:54,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942555391] [2023-11-28 20:22:54,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:22:54,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:22:54,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:22:54,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:22:54,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:22:54,003 INFO L87 Difference]: Start difference. First operand 142740 states and 151883 transitions. Second operand has 3 states, 3 states have (on average 99.66666666666667) 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) [2023-11-28 20:22:56,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:22:56,569 INFO L93 Difference]: Finished difference Result 292287 states and 311150 transitions. [2023-11-28 20:22:56,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:22:56,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.66666666666667) 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 620 [2023-11-28 20:22:56,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:22:56,725 INFO L225 Difference]: With dead ends: 292287 [2023-11-28 20:22:56,725 INFO L226 Difference]: Without dead ends: 150398 [2023-11-28 20:22:56,778 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 [2023-11-28 20:22:56,778 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 382 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-28 20:22:56,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 294 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-28 20:22:56,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150398 states. [2023-11-28 20:22:58,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150398 to 149540. [2023-11-28 20:22:58,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149540 states, 149539 states have (on average 1.0632811507365971) internal successors, (159002), 149539 states have internal predecessors, (159002), 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) [2023-11-28 20:22:58,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149540 states to 149540 states and 159002 transitions. [2023-11-28 20:22:58,727 INFO L78 Accepts]: Start accepts. Automaton has 149540 states and 159002 transitions. Word has length 620 [2023-11-28 20:22:58,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:22:58,728 INFO L495 AbstractCegarLoop]: Abstraction has 149540 states and 159002 transitions. [2023-11-28 20:22:58,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.66666666666667) 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) [2023-11-28 20:22:58,728 INFO L276 IsEmpty]: Start isEmpty. Operand 149540 states and 159002 transitions. [2023-11-28 20:22:58,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2023-11-28 20:22:58,738 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:22:58,738 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, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:22:58,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-28 20:22:58,739 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:22:58,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:22:58,739 INFO L85 PathProgramCache]: Analyzing trace with hash -460242705, now seen corresponding path program 1 times [2023-11-28 20:22:58,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:22:58,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597855583] [2023-11-28 20:22:58,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:58,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:22:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:59,390 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-11-28 20:22:59,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:22:59,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597855583] [2023-11-28 20:22:59,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597855583] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:22:59,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:22:59,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:22:59,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264098020] [2023-11-28 20:22:59,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:22:59,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:22:59,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:22:59,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:22:59,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:22:59,393 INFO L87 Difference]: Start difference. First operand 149540 states and 159002 transitions. Second operand has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 2 states have internal predecessors, (460), 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) [2023-11-28 20:23:00,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:23:00,963 INFO L93 Difference]: Finished difference Result 293108 states and 311526 transitions. [2023-11-28 20:23:00,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:23:00,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 2 states have internal predecessors, (460), 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 622 [2023-11-28 20:23:00,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:23:01,104 INFO L225 Difference]: With dead ends: 293108 [2023-11-28 20:23:01,104 INFO L226 Difference]: Without dead ends: 144417 [2023-11-28 20:23:01,158 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 [2023-11-28 20:23:01,159 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 315 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:23:01,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 80 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-28 20:23:01,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144417 states. [2023-11-28 20:23:02,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144417 to 144397. [2023-11-28 20:23:03,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144397 states, 144396 states have (on average 1.061781489791961) internal successors, (153317), 144396 states have internal predecessors, (153317), 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) [2023-11-28 20:23:03,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144397 states to 144397 states and 153317 transitions. [2023-11-28 20:23:03,186 INFO L78 Accepts]: Start accepts. Automaton has 144397 states and 153317 transitions. Word has length 622 [2023-11-28 20:23:03,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:23:03,187 INFO L495 AbstractCegarLoop]: Abstraction has 144397 states and 153317 transitions. [2023-11-28 20:23:03,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 2 states have internal predecessors, (460), 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) [2023-11-28 20:23:03,187 INFO L276 IsEmpty]: Start isEmpty. Operand 144397 states and 153317 transitions. [2023-11-28 20:23:03,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 639 [2023-11-28 20:23:03,199 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:23:03,200 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, 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, 3, 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] [2023-11-28 20:23:03,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-28 20:23:03,200 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:23:03,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:23:03,200 INFO L85 PathProgramCache]: Analyzing trace with hash 342829538, now seen corresponding path program 1 times [2023-11-28 20:23:03,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:23:03,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604788042] [2023-11-28 20:23:03,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:23:03,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:23:03,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:23:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1070 backedges. 753 proven. 72 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-11-28 20:23:04,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:23:04,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604788042] [2023-11-28 20:23:04,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604788042] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:23:04,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674648044] [2023-11-28 20:23:04,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:23:04,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:23:04,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:23:04,221 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:23:04,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 20:23:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:23:04,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-28 20:23:04,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:23:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1070 backedges. 585 proven. 216 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2023-11-28 20:23:05,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:23:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1070 backedges. 556 proven. 0 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2023-11-28 20:23:05,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674648044] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:23:05,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:23:05,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 8 [2023-11-28 20:23:05,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55780141] [2023-11-28 20:23:05,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:23:05,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:23:05,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:23:05,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:23:05,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:23:05,676 INFO L87 Difference]: Start difference. First operand 144397 states and 153317 transitions. Second operand has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 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) [2023-11-28 20:23:08,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:23:08,366 INFO L93 Difference]: Finished difference Result 299428 states and 317781 transitions. [2023-11-28 20:23:08,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:23:08,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 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 638 [2023-11-28 20:23:08,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:23:08,533 INFO L225 Difference]: With dead ends: 299428 [2023-11-28 20:23:08,533 INFO L226 Difference]: Without dead ends: 155455 [2023-11-28 20:23:08,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1279 GetRequests, 1273 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:23:08,584 INFO L413 NwaCegarLoop]: 689 mSDtfsCounter, 382 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-28 20:23:08,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 721 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-28 20:23:08,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155455 states. [2023-11-28 20:23:10,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155455 to 147349. [2023-11-28 20:23:10,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147349 states, 147348 states have (on average 1.053594212340853) internal successors, (155245), 147348 states have internal predecessors, (155245), 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) [2023-11-28 20:23:10,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147349 states to 147349 states and 155245 transitions. [2023-11-28 20:23:10,669 INFO L78 Accepts]: Start accepts. Automaton has 147349 states and 155245 transitions. Word has length 638 [2023-11-28 20:23:10,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:23:10,669 INFO L495 AbstractCegarLoop]: Abstraction has 147349 states and 155245 transitions. [2023-11-28 20:23:10,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 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) [2023-11-28 20:23:10,670 INFO L276 IsEmpty]: Start isEmpty. Operand 147349 states and 155245 transitions. [2023-11-28 20:23:10,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 740 [2023-11-28 20:23:10,681 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:23:10,681 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, 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, 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, 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] [2023-11-28 20:23:10,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-28 20:23:10,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-28 20:23:10,882 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:23:10,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:23:10,882 INFO L85 PathProgramCache]: Analyzing trace with hash -2021927018, now seen corresponding path program 1 times [2023-11-28 20:23:10,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:23:10,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31150029] [2023-11-28 20:23:10,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:23:10,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:23:10,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:23:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 1188 proven. 0 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2023-11-28 20:23:11,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:23:11,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31150029] [2023-11-28 20:23:11,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31150029] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:23:11,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:23:11,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:23:11,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403540033] [2023-11-28 20:23:11,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:23:11,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:23:11,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:23:11,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:23:11,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:23:11,994 INFO L87 Difference]: Start difference. First operand 147349 states and 155245 transitions. Second operand has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 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) [2023-11-28 20:23:15,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:23:15,562 INFO L93 Difference]: Finished difference Result 325782 states and 342853 transitions. [2023-11-28 20:23:15,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:23:15,562 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 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 739 [2023-11-28 20:23:15,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:23:15,722 INFO L225 Difference]: With dead ends: 325782 [2023-11-28 20:23:15,722 INFO L226 Difference]: Without dead ends: 179284 [2023-11-28 20:23:15,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:23:15,767 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 775 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2290 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 2290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-28 20:23:15,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [775 Valid, 129 Invalid, 2607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 2290 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-28 20:23:15,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179284 states. [2023-11-28 20:23:17,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179284 to 169493. [2023-11-28 20:23:17,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169493 states, 169492 states have (on average 1.0522030538314493) internal successors, (178340), 169492 states have internal predecessors, (178340), 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) [2023-11-28 20:23:17,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169493 states to 169493 states and 178340 transitions. [2023-11-28 20:23:17,920 INFO L78 Accepts]: Start accepts. Automaton has 169493 states and 178340 transitions. Word has length 739 [2023-11-28 20:23:17,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:23:17,921 INFO L495 AbstractCegarLoop]: Abstraction has 169493 states and 178340 transitions. [2023-11-28 20:23:17,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 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) [2023-11-28 20:23:17,921 INFO L276 IsEmpty]: Start isEmpty. Operand 169493 states and 178340 transitions. [2023-11-28 20:23:17,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 745 [2023-11-28 20:23:17,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:23:17,933 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, 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, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:23:17,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-28 20:23:17,933 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:23:17,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:23:17,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1582623121, now seen corresponding path program 1 times [2023-11-28 20:23:17,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:23:17,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684285566] [2023-11-28 20:23:17,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:23:17,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:23:18,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:23:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 850 proven. 194 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-28 20:23:19,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:23:19,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684285566] [2023-11-28 20:23:19,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684285566] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:23:19,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790471909] [2023-11-28 20:23:19,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:23:19,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:23:19,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:23:19,165 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:23:19,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 20:23:19,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:23:19,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 20:23:19,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:23:20,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 683 proven. 197 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-11-28 20:23:20,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:23:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 880 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-11-28 20:23:20,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790471909] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:23:20,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:23:20,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2023-11-28 20:23:20,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656008607] [2023-11-28 20:23:20,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:23:20,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:23:20,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:23:20,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:23:20,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:23:20,824 INFO L87 Difference]: Start difference. First operand 169493 states and 178340 transitions. Second operand has 5 states, 5 states have (on average 116.4) internal successors, (582), 5 states have internal predecessors, (582), 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) [2023-11-28 20:23:24,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:23:24,820 INFO L93 Difference]: Finished difference Result 353874 states and 372328 transitions. [2023-11-28 20:23:24,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:23:24,821 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 116.4) internal successors, (582), 5 states have internal predecessors, (582), 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 744 [2023-11-28 20:23:24,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:23:24,990 INFO L225 Difference]: With dead ends: 353874 [2023-11-28 20:23:24,990 INFO L226 Difference]: Without dead ends: 184380 [2023-11-28 20:23:25,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1492 GetRequests, 1482 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:23:25,045 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 1280 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 2049 mSolverCounterSat, 718 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1280 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 2767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 718 IncrementalHoareTripleChecker+Valid, 2049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:23:25,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1280 Valid, 94 Invalid, 2767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [718 Valid, 2049 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-28 20:23:25,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184380 states. [2023-11-28 20:23:26,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184380 to 169908. [2023-11-28 20:23:27,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169908 states, 169907 states have (on average 1.0499273131772087) internal successors, (178390), 169907 states have internal predecessors, (178390), 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) [2023-11-28 20:23:27,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169908 states to 169908 states and 178390 transitions. [2023-11-28 20:23:27,273 INFO L78 Accepts]: Start accepts. Automaton has 169908 states and 178390 transitions. Word has length 744 [2023-11-28 20:23:27,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:23:27,274 INFO L495 AbstractCegarLoop]: Abstraction has 169908 states and 178390 transitions. [2023-11-28 20:23:27,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.4) internal successors, (582), 5 states have internal predecessors, (582), 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) [2023-11-28 20:23:27,274 INFO L276 IsEmpty]: Start isEmpty. Operand 169908 states and 178390 transitions. [2023-11-28 20:23:27,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2023-11-28 20:23:27,285 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:23:27,286 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, 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, 3, 3, 3, 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, 2, 2, 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] [2023-11-28 20:23:27,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-28 20:23:27,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-28 20:23:27,486 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:23:27,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:23:27,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1905451900, now seen corresponding path program 1 times [2023-11-28 20:23:27,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:23:27,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559575689] [2023-11-28 20:23:27,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:23:27,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:23:27,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:23:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 591 proven. 0 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2023-11-28 20:23:27,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:23:27,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559575689] [2023-11-28 20:23:27,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559575689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:23:27,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:23:27,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:23:27,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822472088] [2023-11-28 20:23:27,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:23:27,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:23:27,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:23:27,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:23:27,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:23:27,803 INFO L87 Difference]: Start difference. First operand 169908 states and 178390 transitions. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 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) [2023-11-28 20:23:30,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:23:30,447 INFO L93 Difference]: Finished difference Result 338959 states and 355872 transitions. [2023-11-28 20:23:30,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:23:30,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 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 747 [2023-11-28 20:23:30,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:23:30,614 INFO L225 Difference]: With dead ends: 338959 [2023-11-28 20:23:30,614 INFO L226 Difference]: Without dead ends: 169902 [2023-11-28 20:23:30,978 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 [2023-11-28 20:23:30,979 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 484 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-28 20:23:30,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 620 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-28 20:23:31,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169902 states. [2023-11-28 20:23:32,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169902 to 169472. [2023-11-28 20:23:32,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169472 states, 169471 states have (on average 1.0468044680210773) internal successors, (177403), 169471 states have internal predecessors, (177403), 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) [2023-11-28 20:23:32,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169472 states to 169472 states and 177403 transitions. [2023-11-28 20:23:32,773 INFO L78 Accepts]: Start accepts. Automaton has 169472 states and 177403 transitions. Word has length 747 [2023-11-28 20:23:32,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:23:32,774 INFO L495 AbstractCegarLoop]: Abstraction has 169472 states and 177403 transitions. [2023-11-28 20:23:32,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 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) [2023-11-28 20:23:32,774 INFO L276 IsEmpty]: Start isEmpty. Operand 169472 states and 177403 transitions. [2023-11-28 20:23:33,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 761 [2023-11-28 20:23:33,012 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:23:33,013 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, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-28 20:23:33,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-28 20:23:33,013 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:23:33,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:23:33,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1573500337, now seen corresponding path program 1 times [2023-11-28 20:23:33,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:23:33,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990172143] [2023-11-28 20:23:33,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:23:33,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:23:33,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:23:33,951 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 543 proven. 210 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-28 20:23:33,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:23:33,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990172143] [2023-11-28 20:23:33,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990172143] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:23:33,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680067425] [2023-11-28 20:23:33,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:23:33,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:23:33,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:23:33,952 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:23:33,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-28 20:23:34,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:23:34,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 20:23:34,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:23:34,828 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 535 proven. 54 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-11-28 20:23:34,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:23:35,125 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 589 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-11-28 20:23:35,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680067425] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:23:35,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:23:35,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 8 [2023-11-28 20:23:35,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674048682] [2023-11-28 20:23:35,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:23:35,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:23:35,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:23:35,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:23:35,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:23:35,128 INFO L87 Difference]: Start difference. First operand 169472 states and 177403 transitions. Second operand has 4 states, 4 states have (on average 149.5) internal successors, (598), 4 states have internal predecessors, (598), 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) [2023-11-28 20:23:38,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:23:38,205 INFO L93 Difference]: Finished difference Result 174584 states and 182615 transitions. [2023-11-28 20:23:38,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:23:38,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 149.5) internal successors, (598), 4 states have internal predecessors, (598), 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 760 [2023-11-28 20:23:38,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:23:38,436 INFO L225 Difference]: With dead ends: 174584 [2023-11-28 20:23:38,436 INFO L226 Difference]: Without dead ends: 174157 [2023-11-28 20:23:38,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1523 GetRequests, 1516 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:23:38,447 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 785 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2024 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 2561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 2024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-28 20:23:38,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [785 Valid, 108 Invalid, 2561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 2024 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-28 20:23:38,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174157 states. [2023-11-28 20:23:39,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174157 to 169472. [2023-11-28 20:23:40,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169472 states, 169471 states have (on average 1.0467159573024294) internal successors, (177388), 169471 states have internal predecessors, (177388), 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) [2023-11-28 20:23:40,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169472 states to 169472 states and 177388 transitions. [2023-11-28 20:23:40,527 INFO L78 Accepts]: Start accepts. Automaton has 169472 states and 177388 transitions. Word has length 760 [2023-11-28 20:23:40,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:23:40,528 INFO L495 AbstractCegarLoop]: Abstraction has 169472 states and 177388 transitions. [2023-11-28 20:23:40,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.5) internal successors, (598), 4 states have internal predecessors, (598), 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) [2023-11-28 20:23:40,528 INFO L276 IsEmpty]: Start isEmpty. Operand 169472 states and 177388 transitions. [2023-11-28 20:23:40,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 812 [2023-11-28 20:23:40,553 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:23:40,553 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, 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, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:23:40,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-28 20:23:40,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-28 20:23:40,760 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:23:40,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:23:40,761 INFO L85 PathProgramCache]: Analyzing trace with hash -2127864546, now seen corresponding path program 1 times [2023-11-28 20:23:40,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:23:40,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824257372] [2023-11-28 20:23:40,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:23:40,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:23:40,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:23:42,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1048 backedges. 730 proven. 237 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-28 20:23:42,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:23:42,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824257372] [2023-11-28 20:23:42,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824257372] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:23:42,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283452544] [2023-11-28 20:23:42,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:23:42,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:23:42,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:23:42,134 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:23:42,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-28 20:23:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:23:42,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 20:23:42,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:23:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1048 backedges. 622 proven. 345 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-28 20:23:51,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:23:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1048 backedges. 622 proven. 345 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-28 20:23:52,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283452544] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:23:52,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:23:52,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2023-11-28 20:23:52,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806861054] [2023-11-28 20:23:52,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:23:52,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-28 20:23:52,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:23:52,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-28 20:23:52,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-28 20:23:52,431 INFO L87 Difference]: Start difference. First operand 169472 states and 177388 transitions. Second operand has 13 states, 13 states have (on average 155.6153846153846) internal successors, (2023), 13 states have internal predecessors, (2023), 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) [2023-11-28 20:24:06,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-28 20:24:11,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-28 20:24:15,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-28 20:24:20,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-28 20:24:42,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:42,321 INFO L93 Difference]: Finished difference Result 414739 states and 433286 transitions. [2023-11-28 20:24:42,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-28 20:24:42,321 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 155.6153846153846) internal successors, (2023), 13 states have internal predecessors, (2023), 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 811 [2023-11-28 20:24:42,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:42,566 INFO L225 Difference]: With dead ends: 414739 [2023-11-28 20:24:42,566 INFO L226 Difference]: Without dead ends: 241868 [2023-11-28 20:24:42,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1709 GetRequests, 1587 SyntacticMatches, 67 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=621, Invalid=2571, Unknown=0, NotChecked=0, Total=3192 [2023-11-28 20:24:42,645 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 10256 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 26098 mSolverCounterSat, 2635 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10256 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 28735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2635 IncrementalHoareTripleChecker+Valid, 26098 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:42,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10256 Valid, 477 Invalid, 28735 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2635 Valid, 26098 Invalid, 2 Unknown, 0 Unchecked, 47.0s Time] [2023-11-28 20:24:42,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241868 states. [2023-11-28 20:24:44,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241868 to 157545. [2023-11-28 20:24:44,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157545 states, 157544 states have (on average 1.0376783628700554) internal successors, (163480), 157544 states have internal predecessors, (163480), 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) [2023-11-28 20:24:44,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157545 states to 157545 states and 163480 transitions. [2023-11-28 20:24:44,853 INFO L78 Accepts]: Start accepts. Automaton has 157545 states and 163480 transitions. Word has length 811 [2023-11-28 20:24:44,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:44,854 INFO L495 AbstractCegarLoop]: Abstraction has 157545 states and 163480 transitions. [2023-11-28 20:24:44,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 155.6153846153846) internal successors, (2023), 13 states have internal predecessors, (2023), 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) [2023-11-28 20:24:44,854 INFO L276 IsEmpty]: Start isEmpty. Operand 157545 states and 163480 transitions. [2023-11-28 20:24:44,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 978 [2023-11-28 20:24:44,899 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:44,899 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-28 20:24:44,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-28 20:24:45,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-28 20:24:45,100 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:24:45,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:45,101 INFO L85 PathProgramCache]: Analyzing trace with hash -573200426, now seen corresponding path program 1 times [2023-11-28 20:24:45,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:45,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355943905] [2023-11-28 20:24:45,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:45,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:45,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:47,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 1240 proven. 107 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-28 20:24:47,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:47,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355943905] [2023-11-28 20:24:47,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355943905] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:24:47,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215923811] [2023-11-28 20:24:47,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:47,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:47,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:24:47,170 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:24:47,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-28 20:24:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:47,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 1160 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:24:47,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:24:47,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 1097 proven. 0 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2023-11-28 20:24:47,819 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:24:47,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215923811] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:24:47,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:24:47,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2023-11-28 20:24:47,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122947776] [2023-11-28 20:24:47,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:24:47,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:24:47,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:47,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:24:47,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:24:47,823 INFO L87 Difference]: Start difference. First operand 157545 states and 163480 transitions. Second operand has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 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) [2023-11-28 20:24:50,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:50,242 INFO L93 Difference]: Finished difference Result 314239 states and 326102 transitions. [2023-11-28 20:24:50,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:24:50,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 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 977 [2023-11-28 20:24:50,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:50,376 INFO L225 Difference]: With dead ends: 314239 [2023-11-28 20:24:50,376 INFO L226 Difference]: Without dead ends: 157545 [2023-11-28 20:24:50,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 982 GetRequests, 976 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:24:50,430 INFO L413 NwaCegarLoop]: 677 mSDtfsCounter, 130 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:50,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 711 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-28 20:24:50,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157545 states. [2023-11-28 20:24:52,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157545 to 155841. [2023-11-28 20:24:52,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155841 states, 155840 states have (on average 1.0378080082135523) internal successors, (161732), 155840 states have internal predecessors, (161732), 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) [2023-11-28 20:24:52,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155841 states to 155841 states and 161732 transitions. [2023-11-28 20:24:52,310 INFO L78 Accepts]: Start accepts. Automaton has 155841 states and 161732 transitions. Word has length 977 [2023-11-28 20:24:52,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:52,311 INFO L495 AbstractCegarLoop]: Abstraction has 155841 states and 161732 transitions. [2023-11-28 20:24:52,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 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) [2023-11-28 20:24:52,311 INFO L276 IsEmpty]: Start isEmpty. Operand 155841 states and 161732 transitions. [2023-11-28 20:24:52,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 996 [2023-11-28 20:24:52,350 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:52,351 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-28 20:24:52,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-28 20:24:52,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:52,551 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:24:52,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:52,552 INFO L85 PathProgramCache]: Analyzing trace with hash -222712954, now seen corresponding path program 1 times [2023-11-28 20:24:52,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:52,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448428192] [2023-11-28 20:24:52,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:52,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:52,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:53,135 INFO L134 CoverageAnalysis]: Checked inductivity of 923 backedges. 720 proven. 0 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2023-11-28 20:24:53,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:53,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448428192] [2023-11-28 20:24:53,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448428192] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:24:53,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:24:53,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:24:53,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149061839] [2023-11-28 20:24:53,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:24:53,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:24:53,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:53,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:24:53,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:24:53,140 INFO L87 Difference]: Start difference. First operand 155841 states and 161732 transitions. Second operand has 3 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 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) [2023-11-28 20:24:55,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:55,628 INFO L93 Difference]: Finished difference Result 309129 states and 320827 transitions. [2023-11-28 20:24:55,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:24:55,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 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 995 [2023-11-28 20:24:55,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:55,766 INFO L225 Difference]: With dead ends: 309129 [2023-11-28 20:24:55,766 INFO L226 Difference]: Without dead ends: 154139 [2023-11-28 20:24:55,822 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 [2023-11-28 20:24:55,823 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 103 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:55,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 645 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-28 20:24:55,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154139 states. [2023-11-28 20:24:57,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154139 to 151163. [2023-11-28 20:24:57,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151163 states, 151162 states have (on average 1.0347971050925497) internal successors, (156422), 151162 states have internal predecessors, (156422), 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) [2023-11-28 20:24:57,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151163 states to 151163 states and 156422 transitions. [2023-11-28 20:24:57,708 INFO L78 Accepts]: Start accepts. Automaton has 151163 states and 156422 transitions. Word has length 995 [2023-11-28 20:24:57,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:57,708 INFO L495 AbstractCegarLoop]: Abstraction has 151163 states and 156422 transitions. [2023-11-28 20:24:57,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 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) [2023-11-28 20:24:57,708 INFO L276 IsEmpty]: Start isEmpty. Operand 151163 states and 156422 transitions. [2023-11-28 20:24:57,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1150 [2023-11-28 20:24:57,757 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:57,758 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 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] [2023-11-28 20:24:57,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-11-28 20:24:57,758 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:24:57,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:57,759 INFO L85 PathProgramCache]: Analyzing trace with hash 268533410, now seen corresponding path program 1 times [2023-11-28 20:24:57,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:57,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188474315] [2023-11-28 20:24:57,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:57,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:57,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1833 backedges. 708 proven. 73 refuted. 0 times theorem prover too weak. 1052 trivial. 0 not checked. [2023-11-28 20:24:59,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:59,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188474315] [2023-11-28 20:24:59,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188474315] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:24:59,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378208844] [2023-11-28 20:24:59,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:59,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:59,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:24:59,014 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:24:59,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-28 20:24:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:59,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 1346 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 20:24:59,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:24:59,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1833 backedges. 708 proven. 73 refuted. 0 times theorem prover too weak. 1052 trivial. 0 not checked. [2023-11-28 20:24:59,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:24:59,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1833 backedges. 781 proven. 0 refuted. 0 times theorem prover too weak. 1052 trivial. 0 not checked. [2023-11-28 20:24:59,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378208844] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:24:59,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:24:59,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2023-11-28 20:24:59,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594244872] [2023-11-28 20:24:59,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:24:59,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:24:59,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:59,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:24:59,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:24:59,872 INFO L87 Difference]: Start difference. First operand 151163 states and 156422 transitions. Second operand has 4 states, 4 states have (on average 145.75) internal successors, (583), 3 states have internal predecessors, (583), 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) [2023-11-28 20:25:03,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:25:03,490 INFO L93 Difference]: Finished difference Result 325326 states and 336666 transitions. [2023-11-28 20:25:03,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:25:03,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 145.75) internal successors, (583), 3 states have internal predecessors, (583), 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 1149 [2023-11-28 20:25:03,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:25:03,642 INFO L225 Difference]: With dead ends: 325326 [2023-11-28 20:25:03,643 INFO L226 Difference]: Without dead ends: 174589 [2023-11-28 20:25:03,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2299 GetRequests, 2295 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:25:03,693 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 778 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2156 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 2448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 2156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-28 20:25:03,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [778 Valid, 127 Invalid, 2448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 2156 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-28 20:25:03,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174589 states. [2023-11-28 20:25:05,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174589 to 140109. [2023-11-28 20:25:05,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140109 states, 140108 states have (on average 1.0358366403060497) internal successors, (145129), 140108 states have internal predecessors, (145129), 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) [2023-11-28 20:25:05,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140109 states to 140109 states and 145129 transitions. [2023-11-28 20:25:05,612 INFO L78 Accepts]: Start accepts. Automaton has 140109 states and 145129 transitions. Word has length 1149 [2023-11-28 20:25:05,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:25:05,612 INFO L495 AbstractCegarLoop]: Abstraction has 140109 states and 145129 transitions. [2023-11-28 20:25:05,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.75) internal successors, (583), 3 states have internal predecessors, (583), 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) [2023-11-28 20:25:05,613 INFO L276 IsEmpty]: Start isEmpty. Operand 140109 states and 145129 transitions. [2023-11-28 20:25:05,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1224 [2023-11-28 20:25:05,661 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:25:05,662 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-28 20:25:05,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-28 20:25:05,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-28 20:25:05,863 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:25:05,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:25:05,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1064145590, now seen corresponding path program 1 times [2023-11-28 20:25:05,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:25:05,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054571660] [2023-11-28 20:25:05,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:05,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:25:06,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:25:07,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2646 backedges. 1512 proven. 144 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2023-11-28 20:25:07,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:25:07,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054571660] [2023-11-28 20:25:07,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054571660] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:25:07,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990770457] [2023-11-28 20:25:07,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:07,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:25:07,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:25:07,509 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:25:07,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-28 20:25:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:25:07,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 1456 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 20:25:07,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:25:09,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2646 backedges. 1548 proven. 108 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2023-11-28 20:25:09,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:25:11,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2646 backedges. 1512 proven. 144 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2023-11-28 20:25:11,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990770457] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:25:11,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:25:11,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-28 20:25:11,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647311193] [2023-11-28 20:25:11,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:25:11,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-28 20:25:11,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:25:11,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-28 20:25:11,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-28 20:25:11,750 INFO L87 Difference]: Start difference. First operand 140109 states and 145129 transitions. Second operand has 11 states, 11 states have (on average 149.63636363636363) internal successors, (1646), 11 states have internal predecessors, (1646), 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) [2023-11-28 20:25:23,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:25:23,467 INFO L93 Difference]: Finished difference Result 363661 states and 376433 transitions. [2023-11-28 20:25:23,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-28 20:25:23,468 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 149.63636363636363) internal successors, (1646), 11 states have internal predecessors, (1646), 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 1223 [2023-11-28 20:25:23,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:25:23,681 INFO L225 Difference]: With dead ends: 363661 [2023-11-28 20:25:23,682 INFO L226 Difference]: Without dead ends: 220153 [2023-11-28 20:25:23,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2459 GetRequests, 2445 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2023-11-28 20:25:23,734 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 7438 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 6893 mSolverCounterSat, 2278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7438 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 9171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2278 IncrementalHoareTripleChecker+Valid, 6893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:25:23,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7438 Valid, 222 Invalid, 9171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2278 Valid, 6893 Invalid, 0 Unknown, 0 Unchecked, 10.3s Time] [2023-11-28 20:25:23,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220153 states. [2023-11-28 20:25:25,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220153 to 161399. [2023-11-28 20:25:25,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161399 states, 161398 states have (on average 1.037162790121315) internal successors, (167396), 161398 states have internal predecessors, (167396), 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) [2023-11-28 20:25:25,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161399 states to 161399 states and 167396 transitions. [2023-11-28 20:25:25,978 INFO L78 Accepts]: Start accepts. Automaton has 161399 states and 167396 transitions. Word has length 1223 [2023-11-28 20:25:25,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:25:25,979 INFO L495 AbstractCegarLoop]: Abstraction has 161399 states and 167396 transitions. [2023-11-28 20:25:25,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 149.63636363636363) internal successors, (1646), 11 states have internal predecessors, (1646), 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) [2023-11-28 20:25:25,980 INFO L276 IsEmpty]: Start isEmpty. Operand 161399 states and 167396 transitions. [2023-11-28 20:25:26,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1457 [2023-11-28 20:25:26,068 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:25:26,069 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 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, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-28 20:25:26,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-28 20:25:26,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-28 20:25:26,270 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:25:26,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:25:26,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1556749152, now seen corresponding path program 1 times [2023-11-28 20:25:26,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:25:26,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528480338] [2023-11-28 20:25:26,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:26,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:25:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:25:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3434 backedges. 1883 proven. 0 refuted. 0 times theorem prover too weak. 1551 trivial. 0 not checked. [2023-11-28 20:25:27,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:25:27,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528480338] [2023-11-28 20:25:27,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528480338] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:25:27,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:25:27,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:25:27,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791565471] [2023-11-28 20:25:27,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:25:27,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:25:27,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:25:27,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:25:27,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:25:27,188 INFO L87 Difference]: Start difference. First operand 161399 states and 167396 transitions. Second operand has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 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) [2023-11-28 20:25:29,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:25:29,379 INFO L93 Difference]: Finished difference Result 311700 states and 323334 transitions. [2023-11-28 20:25:29,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:25:29,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 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 1456 [2023-11-28 20:25:29,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:25:29,726 INFO L225 Difference]: With dead ends: 311700 [2023-11-28 20:25:29,726 INFO L226 Difference]: Without dead ends: 150302 [2023-11-28 20:25:29,766 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 [2023-11-28 20:25:29,767 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 473 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:25:29,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 168 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 1104 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-28 20:25:29,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150302 states. [2023-11-28 20:25:31,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150302 to 139671. [2023-11-28 20:25:31,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139671 states, 139670 states have (on average 1.0365003221880147) internal successors, (144768), 139670 states have internal predecessors, (144768), 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) [2023-11-28 20:25:31,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139671 states to 139671 states and 144768 transitions. [2023-11-28 20:25:31,270 INFO L78 Accepts]: Start accepts. Automaton has 139671 states and 144768 transitions. Word has length 1456 [2023-11-28 20:25:31,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:25:31,270 INFO L495 AbstractCegarLoop]: Abstraction has 139671 states and 144768 transitions. [2023-11-28 20:25:31,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 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) [2023-11-28 20:25:31,270 INFO L276 IsEmpty]: Start isEmpty. Operand 139671 states and 144768 transitions. [2023-11-28 20:25:31,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1539 [2023-11-28 20:25:31,356 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:25:31,357 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:25:31,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-11-28 20:25:31,357 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:25:31,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:25:31,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1740390024, now seen corresponding path program 1 times [2023-11-28 20:25:31,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:25:31,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339578142] [2023-11-28 20:25:31,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:31,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:25:31,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:25:33,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 1714 proven. 0 refuted. 0 times theorem prover too weak. 1437 trivial. 0 not checked. [2023-11-28 20:25:33,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:25:33,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339578142] [2023-11-28 20:25:33,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339578142] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:25:33,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:25:33,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:25:33,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274778161] [2023-11-28 20:25:33,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:25:33,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:25:33,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:25:33,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:25:33,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:25:33,802 INFO L87 Difference]: Start difference. First operand 139671 states and 144768 transitions. Second operand has 4 states, 4 states have (on average 203.25) internal successors, (813), 4 states have internal predecessors, (813), 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) [2023-11-28 20:25:36,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:25:36,588 INFO L93 Difference]: Finished difference Result 267415 states and 277158 transitions. [2023-11-28 20:25:36,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:25:36,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 203.25) internal successors, (813), 4 states have internal predecessors, (813), 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 1538 [2023-11-28 20:25:36,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:25:36,692 INFO L225 Difference]: With dead ends: 267415 [2023-11-28 20:25:36,692 INFO L226 Difference]: Without dead ends: 127745 [2023-11-28 20:25:36,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:25:36,724 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 442 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 2155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:25:36,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 671 Invalid, 2155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-28 20:25:36,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127745 states. [2023-11-28 20:25:37,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127745 to 125183. [2023-11-28 20:25:37,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125183 states, 125182 states have (on average 1.034437858478056) internal successors, (129493), 125182 states have internal predecessors, (129493), 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) [2023-11-28 20:25:38,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125183 states to 125183 states and 129493 transitions. [2023-11-28 20:25:38,084 INFO L78 Accepts]: Start accepts. Automaton has 125183 states and 129493 transitions. Word has length 1538 [2023-11-28 20:25:38,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:25:38,085 INFO L495 AbstractCegarLoop]: Abstraction has 125183 states and 129493 transitions. [2023-11-28 20:25:38,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 203.25) internal successors, (813), 4 states have internal predecessors, (813), 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) [2023-11-28 20:25:38,086 INFO L276 IsEmpty]: Start isEmpty. Operand 125183 states and 129493 transitions. [2023-11-28 20:25:38,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1626 [2023-11-28 20:25:38,174 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:25:38,175 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:25:38,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-11-28 20:25:38,175 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:25:38,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:25:38,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1421724736, now seen corresponding path program 1 times [2023-11-28 20:25:38,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:25:38,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034965853] [2023-11-28 20:25:38,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:38,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:25:38,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:25:40,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3947 backedges. 3123 proven. 105 refuted. 0 times theorem prover too weak. 719 trivial. 0 not checked. [2023-11-28 20:25:40,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:25:40,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034965853] [2023-11-28 20:25:40,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034965853] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:25:40,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884367738] [2023-11-28 20:25:40,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:40,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:25:40,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:25:40,592 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:25:40,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-28 20:25:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:25:41,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 1879 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 20:25:41,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:25:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3947 backedges. 2994 proven. 234 refuted. 0 times theorem prover too weak. 719 trivial. 0 not checked. [2023-11-28 20:25:41,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:25:42,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3947 backedges. 2978 proven. 0 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2023-11-28 20:25:42,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884367738] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:25:42,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:25:42,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 12 [2023-11-28 20:25:42,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335255334] [2023-11-28 20:25:42,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:25:42,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:25:42,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:25:42,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:25:42,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:25:42,755 INFO L87 Difference]: Start difference. First operand 125183 states and 129493 transitions. Second operand has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 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) [2023-11-28 20:25:45,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:25:45,800 INFO L93 Difference]: Finished difference Result 263116 states and 272077 transitions. [2023-11-28 20:25:45,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:25:45,800 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 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 1625 [2023-11-28 20:25:45,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:25:45,912 INFO L225 Difference]: With dead ends: 263116 [2023-11-28 20:25:45,912 INFO L226 Difference]: Without dead ends: 137934 [2023-11-28 20:25:45,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3253 GetRequests, 3243 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:25:45,960 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 795 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2022 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 2022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:25:45,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [795 Valid, 90 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 2022 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-28 20:25:46,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137934 states. [2023-11-28 20:25:47,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137934 to 125183. [2023-11-28 20:25:47,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125183 states, 125182 states have (on average 1.0342221725168155) internal successors, (129466), 125182 states have internal predecessors, (129466), 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) [2023-11-28 20:25:47,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125183 states to 125183 states and 129466 transitions. [2023-11-28 20:25:47,636 INFO L78 Accepts]: Start accepts. Automaton has 125183 states and 129466 transitions. Word has length 1625 [2023-11-28 20:25:47,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:25:47,637 INFO L495 AbstractCegarLoop]: Abstraction has 125183 states and 129466 transitions. [2023-11-28 20:25:47,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 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) [2023-11-28 20:25:47,638 INFO L276 IsEmpty]: Start isEmpty. Operand 125183 states and 129466 transitions. [2023-11-28 20:25:47,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1725 [2023-11-28 20:25:47,774 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:25:47,775 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:25:47,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-28 20:25:47,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-28 20:25:47,976 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:25:47,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:25:47,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1223763587, now seen corresponding path program 1 times [2023-11-28 20:25:47,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:25:47,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677789070] [2023-11-28 20:25:47,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:47,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:25:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:25:49,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2674 proven. 0 refuted. 0 times theorem prover too weak. 1558 trivial. 0 not checked. [2023-11-28 20:25:49,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:25:49,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677789070] [2023-11-28 20:25:49,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677789070] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:25:49,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:25:49,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:25:49,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089566353] [2023-11-28 20:25:49,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:25:49,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:25:49,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:25:49,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:25:49,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:25:49,891 INFO L87 Difference]: Start difference. First operand 125183 states and 129466 transitions. Second operand has 4 states, 4 states have (on average 233.25) internal successors, (933), 4 states have internal predecessors, (933), 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) [2023-11-28 20:25:52,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:25:52,761 INFO L93 Difference]: Finished difference Result 245685 states and 253878 transitions. [2023-11-28 20:25:52,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:25:52,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 233.25) internal successors, (933), 4 states have internal predecessors, (933), 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 1724 [2023-11-28 20:25:52,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:25:52,860 INFO L225 Difference]: With dead ends: 245685 [2023-11-28 20:25:52,860 INFO L226 Difference]: Without dead ends: 120503 [2023-11-28 20:25:52,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:25:52,905 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 674 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 2121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:25:52,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [674 Valid, 683 Invalid, 2121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-28 20:25:52,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120503 states. [2023-11-28 20:25:53,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120503 to 111124. [2023-11-28 20:25:54,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111124 states, 111123 states have (on average 1.0326575056468958) internal successors, (114752), 111123 states have internal predecessors, (114752), 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) [2023-11-28 20:25:54,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111124 states to 111124 states and 114752 transitions. [2023-11-28 20:25:54,165 INFO L78 Accepts]: Start accepts. Automaton has 111124 states and 114752 transitions. Word has length 1724 [2023-11-28 20:25:54,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:25:54,166 INFO L495 AbstractCegarLoop]: Abstraction has 111124 states and 114752 transitions. [2023-11-28 20:25:54,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 233.25) internal successors, (933), 4 states have internal predecessors, (933), 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) [2023-11-28 20:25:54,167 INFO L276 IsEmpty]: Start isEmpty. Operand 111124 states and 114752 transitions. [2023-11-28 20:25:54,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1849 [2023-11-28 20:25:54,511 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:25:54,512 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2023-11-28 20:25:54,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-11-28 20:25:54,512 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:25:54,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:25:54,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1471512084, now seen corresponding path program 1 times [2023-11-28 20:25:54,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:25:54,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778879327] [2023-11-28 20:25:54,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:54,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:25:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:25:57,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4690 backedges. 2505 proven. 998 refuted. 0 times theorem prover too weak. 1187 trivial. 0 not checked. [2023-11-28 20:25:57,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:25:57,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778879327] [2023-11-28 20:25:57,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778879327] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:25:57,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693798323] [2023-11-28 20:25:57,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:57,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:25:57,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:25:57,791 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:25:57,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-28 20:25:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:25:58,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 2106 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 20:25:58,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:26:00,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4690 backedges. 3257 proven. 430 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2023-11-28 20:26:00,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:26:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4690 backedges. 2709 proven. 430 refuted. 0 times theorem prover too weak. 1551 trivial. 0 not checked. [2023-11-28 20:26:15,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693798323] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:26:15,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:26:15,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 15 [2023-11-28 20:26:15,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762869731] [2023-11-28 20:26:15,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:26:15,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-28 20:26:15,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:26:15,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-28 20:26:15,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2023-11-28 20:26:15,915 INFO L87 Difference]: Start difference. First operand 111124 states and 114752 transitions. Second operand has 15 states, 15 states have (on average 161.46666666666667) internal successors, (2422), 15 states have internal predecessors, (2422), 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) [2023-11-28 20:26:31,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:26:31,253 INFO L93 Difference]: Finished difference Result 274229 states and 282822 transitions. [2023-11-28 20:26:31,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-28 20:26:31,253 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 161.46666666666667) internal successors, (2422), 15 states have internal predecessors, (2422), 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 1848 [2023-11-28 20:26:31,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:26:31,390 INFO L225 Difference]: With dead ends: 274229 [2023-11-28 20:26:31,391 INFO L226 Difference]: Without dead ends: 161831 [2023-11-28 20:26:31,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3722 GetRequests, 3697 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2023-11-28 20:26:31,441 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 6833 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 9925 mSolverCounterSat, 1266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6833 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 11191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1266 IncrementalHoareTripleChecker+Valid, 9925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:26:31,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6833 Valid, 232 Invalid, 11191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1266 Valid, 9925 Invalid, 0 Unknown, 0 Unchecked, 14.0s Time] [2023-11-28 20:26:31,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161831 states. [2023-11-28 20:26:32,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161831 to 117094. [2023-11-28 20:26:32,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117094 states, 117093 states have (on average 1.0294808400160556) internal successors, (120545), 117093 states have internal predecessors, (120545), 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) [2023-11-28 20:26:32,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117094 states to 117094 states and 120545 transitions. [2023-11-28 20:26:32,990 INFO L78 Accepts]: Start accepts. Automaton has 117094 states and 120545 transitions. Word has length 1848 [2023-11-28 20:26:32,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:26:32,991 INFO L495 AbstractCegarLoop]: Abstraction has 117094 states and 120545 transitions. [2023-11-28 20:26:32,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 161.46666666666667) internal successors, (2422), 15 states have internal predecessors, (2422), 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) [2023-11-28 20:26:32,991 INFO L276 IsEmpty]: Start isEmpty. Operand 117094 states and 120545 transitions. [2023-11-28 20:26:33,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2665 [2023-11-28 20:26:33,096 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:26:33,097 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 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, 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, 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] [2023-11-28 20:26:33,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-28 20:26:33,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-28 20:26:33,298 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:26:33,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:26:33,299 INFO L85 PathProgramCache]: Analyzing trace with hash 670378091, now seen corresponding path program 1 times [2023-11-28 20:26:33,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:26:33,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846779963] [2023-11-28 20:26:33,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:26:33,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:26:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:26:40,567 INFO L134 CoverageAnalysis]: Checked inductivity of 10254 backedges. 4424 proven. 4379 refuted. 0 times theorem prover too weak. 1451 trivial. 0 not checked. [2023-11-28 20:26:40,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:26:40,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846779963] [2023-11-28 20:26:40,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846779963] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:26:40,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718708917] [2023-11-28 20:26:40,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:26:40,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:26:40,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:26:40,569 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:26:40,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-28 20:26:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:26:41,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 2994 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:26:41,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:26:46,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10254 backedges. 3644 proven. 3461 refuted. 0 times theorem prover too weak. 3149 trivial. 0 not checked. [2023-11-28 20:26:46,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:26:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10254 backedges. 2360 proven. 0 refuted. 0 times theorem prover too weak. 7894 trivial. 0 not checked. [2023-11-28 20:26:46,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718708917] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:26:46,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:26:46,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 15 [2023-11-28 20:26:46,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890188281] [2023-11-28 20:26:46,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:26:46,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:26:46,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:26:46,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:26:46,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-11-28 20:26:46,476 INFO L87 Difference]: Start difference. First operand 117094 states and 120545 transitions. Second operand has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 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) [2023-11-28 20:26:48,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:26:48,625 INFO L93 Difference]: Finished difference Result 231211 states and 238059 transitions. [2023-11-28 20:26:48,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:26:48,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 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 2664 [2023-11-28 20:26:48,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:26:48,778 INFO L225 Difference]: With dead ends: 231211 [2023-11-28 20:26:48,778 INFO L226 Difference]: Without dead ends: 114543 [2023-11-28 20:26:48,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5334 GetRequests, 5321 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-11-28 20:26:48,827 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 240 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:26:48,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 169 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-28 20:26:48,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114543 states. [2023-11-28 20:26:50,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114543 to 102218. [2023-11-28 20:26:50,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102218 states, 102217 states have (on average 1.0287525558370916) internal successors, (105156), 102217 states have internal predecessors, (105156), 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) [2023-11-28 20:26:50,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102218 states to 102218 states and 105156 transitions. [2023-11-28 20:26:50,300 INFO L78 Accepts]: Start accepts. Automaton has 102218 states and 105156 transitions. Word has length 2664 [2023-11-28 20:26:50,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:26:50,302 INFO L495 AbstractCegarLoop]: Abstraction has 102218 states and 105156 transitions. [2023-11-28 20:26:50,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 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) [2023-11-28 20:26:50,303 INFO L276 IsEmpty]: Start isEmpty. Operand 102218 states and 105156 transitions. [2023-11-28 20:26:50,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2684 [2023-11-28 20:26:50,405 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:26:50,406 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 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, 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, 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, 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] [2023-11-28 20:26:50,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-28 20:26:50,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-28 20:26:50,607 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:26:50,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:26:50,608 INFO L85 PathProgramCache]: Analyzing trace with hash 463409611, now seen corresponding path program 1 times [2023-11-28 20:26:50,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:26:50,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493573202] [2023-11-28 20:26:50,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:26:50,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:26:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:26:58,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10463 backedges. 4528 proven. 4582 refuted. 0 times theorem prover too weak. 1353 trivial. 0 not checked. [2023-11-28 20:26:58,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:26:58,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493573202] [2023-11-28 20:26:58,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493573202] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:26:58,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298582207] [2023-11-28 20:26:58,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:26:58,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:26:58,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:26:58,071 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:26:58,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51363b57-24fc-460d-89e5-8b69c6e9cf21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process