./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem11_label23.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_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem11_label23.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI --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 f869ff34b8d1fc9233da1bce651f8bc007d942cb0a36d4a975409aebb2d888b1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:56:13,797 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:56:13,913 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:56:13,926 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:56:13,927 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:56:13,960 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:56:13,961 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:56:13,962 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:56:13,962 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:56:13,967 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:56:13,968 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:56:13,969 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:56:13,970 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:56:13,972 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:56:13,972 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:56:13,973 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:56:13,973 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:56:13,974 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:56:13,974 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:56:13,974 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:56:13,975 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:56:13,975 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:56:13,976 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:56:13,976 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:56:13,977 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:56:13,977 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:56:13,978 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:56:13,978 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:56:13,979 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:56:13,979 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:56:13,981 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:56:13,981 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:56:13,981 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:56:13,981 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:56:13,982 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:56:13,982 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:56:13,982 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:56:13,982 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:56:13,983 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:56:13,983 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:56:13,983 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:56:13,983 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:56:13,984 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_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f869ff34b8d1fc9233da1bce651f8bc007d942cb0a36d4a975409aebb2d888b1 [2023-11-24 21:56:14,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:56:14,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:56:14,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:56:14,333 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:56:14,333 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:56:14,335 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/eca-rers2012/Problem11_label23.c [2023-11-24 21:56:17,444 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:56:17,826 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:56:17,828 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/sv-benchmarks/c/eca-rers2012/Problem11_label23.c [2023-11-24 21:56:17,850 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/data/9851a4fb1/9d1dbeb439244096ac0c5b58df44593b/FLAG560153b92 [2023-11-24 21:56:17,868 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/data/9851a4fb1/9d1dbeb439244096ac0c5b58df44593b [2023-11-24 21:56:17,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:56:17,876 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:56:17,881 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:56:17,881 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:56:17,886 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:56:17,887 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:56:17" (1/1) ... [2023-11-24 21:56:17,888 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67d94ede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:17, skipping insertion in model container [2023-11-24 21:56:17,888 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:56:17" (1/1) ... [2023-11-24 21:56:17,955 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:56:18,212 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_12fe4e4b-4f2d-46c8-8949-281e65cd3871/sv-benchmarks/c/eca-rers2012/Problem11_label23.c[9364,9377] [2023-11-24 21:56:18,544 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:56:18,557 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:56:18,624 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_12fe4e4b-4f2d-46c8-8949-281e65cd3871/sv-benchmarks/c/eca-rers2012/Problem11_label23.c[9364,9377] [2023-11-24 21:56:18,850 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:56:18,868 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:56:18,868 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:18 WrapperNode [2023-11-24 21:56:18,869 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:56:18,870 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:56:18,871 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:56:18,871 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:56:18,878 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:18" (1/1) ... [2023-11-24 21:56:18,913 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:18" (1/1) ... [2023-11-24 21:56:19,043 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1000 [2023-11-24 21:56:19,044 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:56:19,045 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:56:19,045 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:56:19,045 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:56:19,057 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:18" (1/1) ... [2023-11-24 21:56:19,057 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:18" (1/1) ... [2023-11-24 21:56:19,073 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:18" (1/1) ... [2023-11-24 21:56:19,138 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]. [2023-11-24 21:56:19,139 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:18" (1/1) ... [2023-11-24 21:56:19,139 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:18" (1/1) ... [2023-11-24 21:56:19,199 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:18" (1/1) ... [2023-11-24 21:56:19,223 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:18" (1/1) ... [2023-11-24 21:56:19,244 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:18" (1/1) ... [2023-11-24 21:56:19,249 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:18" (1/1) ... [2023-11-24 21:56:19,336 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:56:19,338 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:56:19,339 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:56:19,339 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:56:19,340 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:18" (1/1) ... [2023-11-24 21:56:19,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:56:19,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:56:19,373 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:56:19,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:56:19,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:56:19,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:56:19,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:56:19,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:56:19,502 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:56:19,506 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:56:21,476 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:56:21,549 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:56:21,552 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 21:56:21,553 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:56:21 BoogieIcfgContainer [2023-11-24 21:56:21,553 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:56:21,557 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:56:21,557 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:56:21,560 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:56:21,561 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:56:17" (1/3) ... [2023-11-24 21:56:21,562 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d27114 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:56:21, skipping insertion in model container [2023-11-24 21:56:21,562 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:18" (2/3) ... [2023-11-24 21:56:21,564 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d27114 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:56:21, skipping insertion in model container [2023-11-24 21:56:21,564 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:56:21" (3/3) ... [2023-11-24 21:56:21,567 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label23.c [2023-11-24 21:56:21,588 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:56:21,588 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 21:56:21,656 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:56:21,663 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;@11508f47, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:56:21,663 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 21:56:21,669 INFO L276 IsEmpty]: Start isEmpty. Operand has 221 states, 219 states have (on average 1.917808219178082) internal successors, (420), 220 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:21,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-24 21:56:21,679 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:21,679 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:21,680 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:56:21,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:21,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1368918646, now seen corresponding path program 1 times [2023-11-24 21:56:21,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:21,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69101908] [2023-11-24 21:56:21,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:21,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:21,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:21,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:21,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69101908] [2023-11-24 21:56:21,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69101908] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:21,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:21,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:56:21,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369183150] [2023-11-24 21:56:21,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:21,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 21:56:21,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:22,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 21:56:22,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:56:22,027 INFO L87 Difference]: Start difference. First operand has 221 states, 219 states have (on average 1.917808219178082) internal successors, (420), 220 states have internal predecessors, (420), 0 states have call successors, (0), 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 32.0) internal successors, (64), 2 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:22,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:22,123 INFO L93 Difference]: Finished difference Result 441 states and 839 transitions. [2023-11-24 21:56:22,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 21:56:22,126 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2023-11-24 21:56:22,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:22,144 INFO L225 Difference]: With dead ends: 441 [2023-11-24 21:56:22,145 INFO L226 Difference]: Without dead ends: 219 [2023-11-24 21:56:22,150 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 [2023-11-24 21:56:22,156 INFO L413 NwaCegarLoop]: 355 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, 355 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 [2023-11-24 21:56:22,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 355 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:56:22,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-11-24 21:56:22,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2023-11-24 21:56:22,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.628440366972477) internal successors, (355), 218 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) [2023-11-24 21:56:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 355 transitions. [2023-11-24 21:56:22,222 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 355 transitions. Word has length 64 [2023-11-24 21:56:22,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:22,223 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 355 transitions. [2023-11-24 21:56:22,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:22,223 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 355 transitions. [2023-11-24 21:56:22,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-24 21:56:22,228 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:22,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:22,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:56:22,229 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:56:22,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:22,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1379110090, now seen corresponding path program 1 times [2023-11-24 21:56:22,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:22,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578456187] [2023-11-24 21:56:22,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:22,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:22,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:22,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578456187] [2023-11-24 21:56:22,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578456187] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:22,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:22,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:56:22,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189483219] [2023-11-24 21:56:22,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:22,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:22,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:22,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:22,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:56:22,507 INFO L87 Difference]: Start difference. First operand 219 states and 355 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:23,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:23,750 INFO L93 Difference]: Finished difference Result 639 states and 1042 transitions. [2023-11-24 21:56:23,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:23,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2023-11-24 21:56:23,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:23,754 INFO L225 Difference]: With dead ends: 639 [2023-11-24 21:56:23,755 INFO L226 Difference]: Without dead ends: 421 [2023-11-24 21:56:23,756 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 [2023-11-24 21:56:23,758 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 147 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:23,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 120 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-24 21:56:23,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2023-11-24 21:56:23,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 411. [2023-11-24 21:56:23,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 1.524390243902439) internal successors, (625), 410 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:23,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 625 transitions. [2023-11-24 21:56:23,809 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 625 transitions. Word has length 64 [2023-11-24 21:56:23,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:23,809 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 625 transitions. [2023-11-24 21:56:23,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:23,810 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 625 transitions. [2023-11-24 21:56:23,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-24 21:56:23,813 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:23,813 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:23,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:56:23,814 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:56:23,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:23,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1049418632, now seen corresponding path program 1 times [2023-11-24 21:56:23,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:23,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917507488] [2023-11-24 21:56:23,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:23,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:23,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:24,158 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:24,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:24,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917507488] [2023-11-24 21:56:24,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917507488] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:24,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:24,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:56:24,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449269767] [2023-11-24 21:56:24,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:24,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:24,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:24,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:24,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:56:24,162 INFO L87 Difference]: Start difference. First operand 411 states and 625 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:25,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:25,226 INFO L93 Difference]: Finished difference Result 1193 states and 1820 transitions. [2023-11-24 21:56:25,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:25,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2023-11-24 21:56:25,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:25,236 INFO L225 Difference]: With dead ends: 1193 [2023-11-24 21:56:25,236 INFO L226 Difference]: Without dead ends: 783 [2023-11-24 21:56:25,239 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 [2023-11-24 21:56:25,241 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 175 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:25,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 152 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 21:56:25,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2023-11-24 21:56:25,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 783. [2023-11-24 21:56:25,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 1.3746803069053708) internal successors, (1075), 782 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:25,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1075 transitions. [2023-11-24 21:56:25,268 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1075 transitions. Word has length 130 [2023-11-24 21:56:25,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:25,269 INFO L495 AbstractCegarLoop]: Abstraction has 783 states and 1075 transitions. [2023-11-24 21:56:25,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:25,270 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1075 transitions. [2023-11-24 21:56:25,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-11-24 21:56:25,273 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:25,273 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:25,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:56:25,274 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:56:25,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:25,274 INFO L85 PathProgramCache]: Analyzing trace with hash 563933698, now seen corresponding path program 1 times [2023-11-24 21:56:25,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:25,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199668293] [2023-11-24 21:56:25,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:25,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:25,826 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:25,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:25,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199668293] [2023-11-24 21:56:25,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199668293] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:25,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:25,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:56:25,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773178800] [2023-11-24 21:56:25,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:25,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:25,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:25,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:25,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:56:25,830 INFO L87 Difference]: Start difference. First operand 783 states and 1075 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:26,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:26,873 INFO L93 Difference]: Finished difference Result 1935 states and 2598 transitions. [2023-11-24 21:56:26,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:26,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2023-11-24 21:56:26,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:26,886 INFO L225 Difference]: With dead ends: 1935 [2023-11-24 21:56:26,886 INFO L226 Difference]: Without dead ends: 1153 [2023-11-24 21:56:26,892 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 [2023-11-24 21:56:26,899 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 119 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:26,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 188 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 21:56:26,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2023-11-24 21:56:26,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1152. [2023-11-24 21:56:26,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 1.2701998262380538) internal successors, (1462), 1151 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:26,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1462 transitions. [2023-11-24 21:56:26,933 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1462 transitions. Word has length 134 [2023-11-24 21:56:26,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:26,934 INFO L495 AbstractCegarLoop]: Abstraction has 1152 states and 1462 transitions. [2023-11-24 21:56:26,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:26,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1462 transitions. [2023-11-24 21:56:26,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-11-24 21:56:26,937 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:26,938 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-24 21:56:26,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:56:26,938 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:56:26,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:26,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1396061959, now seen corresponding path program 1 times [2023-11-24 21:56:26,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:26,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996129078] [2023-11-24 21:56:26,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:26,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:27,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:27,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996129078] [2023-11-24 21:56:27,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996129078] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:27,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:27,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:56:27,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30798936] [2023-11-24 21:56:27,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:27,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:27,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:27,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:27,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:56:27,212 INFO L87 Difference]: Start difference. First operand 1152 states and 1462 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:28,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:28,167 INFO L93 Difference]: Finished difference Result 2678 states and 3480 transitions. [2023-11-24 21:56:28,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:28,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 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 176 [2023-11-24 21:56:28,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:28,181 INFO L225 Difference]: With dead ends: 2678 [2023-11-24 21:56:28,182 INFO L226 Difference]: Without dead ends: 1711 [2023-11-24 21:56:28,183 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 [2023-11-24 21:56:28,191 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 141 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:28,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 329 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 21:56:28,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2023-11-24 21:56:28,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1520. [2023-11-24 21:56:28,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1519 states have (on average 1.2560895325872283) internal successors, (1908), 1519 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:28,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 1908 transitions. [2023-11-24 21:56:28,270 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 1908 transitions. Word has length 176 [2023-11-24 21:56:28,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:28,272 INFO L495 AbstractCegarLoop]: Abstraction has 1520 states and 1908 transitions. [2023-11-24 21:56:28,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:28,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 1908 transitions. [2023-11-24 21:56:28,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2023-11-24 21:56:28,284 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:28,284 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:28,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:56:28,285 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:56:28,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:28,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1403523461, now seen corresponding path program 1 times [2023-11-24 21:56:28,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:28,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840904889] [2023-11-24 21:56:28,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:28,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:28,697 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-24 21:56:28,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:28,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840904889] [2023-11-24 21:56:28,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840904889] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:28,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:28,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:56:28,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493349959] [2023-11-24 21:56:28,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:28,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:28,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:28,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:28,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:56:28,702 INFO L87 Difference]: Start difference. First operand 1520 states and 1908 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:29,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:29,844 INFO L93 Difference]: Finished difference Result 3596 states and 4558 transitions. [2023-11-24 21:56:29,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:29,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 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 246 [2023-11-24 21:56:29,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:29,858 INFO L225 Difference]: With dead ends: 3596 [2023-11-24 21:56:29,858 INFO L226 Difference]: Without dead ends: 2077 [2023-11-24 21:56:29,860 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 [2023-11-24 21:56:29,861 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 132 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:29,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 388 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-24 21:56:29,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2023-11-24 21:56:29,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 1888. [2023-11-24 21:56:29,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 1.2474827768945416) internal successors, (2354), 1887 states have internal predecessors, (2354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:29,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 2354 transitions. [2023-11-24 21:56:29,913 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 2354 transitions. Word has length 246 [2023-11-24 21:56:29,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:29,914 INFO L495 AbstractCegarLoop]: Abstraction has 1888 states and 2354 transitions. [2023-11-24 21:56:29,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:29,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 2354 transitions. [2023-11-24 21:56:29,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-11-24 21:56:29,920 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:29,920 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:29,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:56:29,921 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:56:29,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:29,922 INFO L85 PathProgramCache]: Analyzing trace with hash 636706630, now seen corresponding path program 1 times [2023-11-24 21:56:29,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:29,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364819892] [2023-11-24 21:56:29,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:29,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:30,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:30,423 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:30,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:30,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364819892] [2023-11-24 21:56:30,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364819892] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:30,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:30,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:56:30,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466661870] [2023-11-24 21:56:30,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:30,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:30,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:30,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:30,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:56:30,427 INFO L87 Difference]: Start difference. First operand 1888 states and 2354 transitions. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:31,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:31,567 INFO L93 Difference]: Finished difference Result 5074 states and 6325 transitions. [2023-11-24 21:56:31,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:31,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 273 [2023-11-24 21:56:31,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:31,585 INFO L225 Difference]: With dead ends: 5074 [2023-11-24 21:56:31,585 INFO L226 Difference]: Without dead ends: 3187 [2023-11-24 21:56:31,588 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 [2023-11-24 21:56:31,590 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 122 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:31,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 138 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-24 21:56:31,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2023-11-24 21:56:31,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 3185. [2023-11-24 21:56:31,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3185 states, 3184 states have (on average 1.2160804020100502) internal successors, (3872), 3184 states have internal predecessors, (3872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:31,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3185 states to 3185 states and 3872 transitions. [2023-11-24 21:56:31,677 INFO L78 Accepts]: Start accepts. Automaton has 3185 states and 3872 transitions. Word has length 273 [2023-11-24 21:56:31,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:31,678 INFO L495 AbstractCegarLoop]: Abstraction has 3185 states and 3872 transitions. [2023-11-24 21:56:31,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:31,679 INFO L276 IsEmpty]: Start isEmpty. Operand 3185 states and 3872 transitions. [2023-11-24 21:56:31,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2023-11-24 21:56:31,685 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:31,686 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:31,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:56:31,686 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:56:31,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:31,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1543337151, now seen corresponding path program 1 times [2023-11-24 21:56:31,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:31,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707176317] [2023-11-24 21:56:31,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:31,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:31,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:32,326 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 212 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:32,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:32,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707176317] [2023-11-24 21:56:32,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707176317] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:32,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:32,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:56:32,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500990530] [2023-11-24 21:56:32,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:32,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:56:32,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:32,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:56:32,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:56:32,332 INFO L87 Difference]: Start difference. First operand 3185 states and 3872 transitions. Second operand has 4 states, 4 states have (on average 69.75) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:34,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:34,341 INFO L93 Difference]: Finished difference Result 10432 states and 12705 transitions. [2023-11-24 21:56:34,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:56:34,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 69.75) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 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 279 [2023-11-24 21:56:34,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:34,381 INFO L225 Difference]: With dead ends: 10432 [2023-11-24 21:56:34,381 INFO L226 Difference]: Without dead ends: 7248 [2023-11-24 21:56:34,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:56:34,388 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 213 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:34,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 148 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-24 21:56:34,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7248 states. [2023-11-24 21:56:34,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7248 to 7241. [2023-11-24 21:56:34,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7241 states, 7240 states have (on average 1.1959944751381215) internal successors, (8659), 7240 states have internal predecessors, (8659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:34,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7241 states to 7241 states and 8659 transitions. [2023-11-24 21:56:34,582 INFO L78 Accepts]: Start accepts. Automaton has 7241 states and 8659 transitions. Word has length 279 [2023-11-24 21:56:34,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:34,583 INFO L495 AbstractCegarLoop]: Abstraction has 7241 states and 8659 transitions. [2023-11-24 21:56:34,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.75) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:34,584 INFO L276 IsEmpty]: Start isEmpty. Operand 7241 states and 8659 transitions. [2023-11-24 21:56:34,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2023-11-24 21:56:34,590 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:34,591 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:34,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:56:34,591 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:56:34,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:34,592 INFO L85 PathProgramCache]: Analyzing trace with hash 289625478, now seen corresponding path program 1 times [2023-11-24 21:56:34,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:34,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855016035] [2023-11-24 21:56:34,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:34,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 157 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:36,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:36,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855016035] [2023-11-24 21:56:36,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855016035] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:56:36,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540188736] [2023-11-24 21:56:36,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:36,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:36,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:56:36,056 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:56:36,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:56:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:36,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:56:36,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-24 21:56:36,865 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:56:36,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540188736] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:36,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:56:36,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-24 21:56:36,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678964021] [2023-11-24 21:56:36,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:36,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:56:36,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:36,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:56:36,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:56:36,874 INFO L87 Difference]: Start difference. First operand 7241 states and 8659 transitions. Second operand has 4 states, 4 states have (on average 44.5) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:38,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:38,476 INFO L93 Difference]: Finished difference Result 19469 states and 23083 transitions. [2023-11-24 21:56:38,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:56:38,478 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 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 282 [2023-11-24 21:56:38,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:38,555 INFO L225 Difference]: With dead ends: 19469 [2023-11-24 21:56:38,556 INFO L226 Difference]: Without dead ends: 12597 [2023-11-24 21:56:38,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:56:38,568 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 258 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:38,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 175 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-24 21:56:38,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12597 states. [2023-11-24 21:56:38,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12597 to 10009. [2023-11-24 21:56:38,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10009 states, 10008 states have (on average 1.181554756195044) internal successors, (11825), 10008 states have internal predecessors, (11825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:38,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10009 states to 10009 states and 11825 transitions. [2023-11-24 21:56:38,840 INFO L78 Accepts]: Start accepts. Automaton has 10009 states and 11825 transitions. Word has length 282 [2023-11-24 21:56:38,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:38,841 INFO L495 AbstractCegarLoop]: Abstraction has 10009 states and 11825 transitions. [2023-11-24 21:56:38,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:38,841 INFO L276 IsEmpty]: Start isEmpty. Operand 10009 states and 11825 transitions. [2023-11-24 21:56:38,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-11-24 21:56:38,850 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:38,850 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:38,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:56:39,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:39,067 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:56:39,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:39,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1050505830, now seen corresponding path program 1 times [2023-11-24 21:56:39,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:39,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982528315] [2023-11-24 21:56:39,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:39,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-11-24 21:56:39,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:39,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982528315] [2023-11-24 21:56:39,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982528315] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:39,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:39,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:56:39,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249035449] [2023-11-24 21:56:39,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:39,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:39,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:39,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:39,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:56:39,362 INFO L87 Difference]: Start difference. First operand 10009 states and 11825 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:40,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:40,359 INFO L93 Difference]: Finished difference Result 19647 states and 23261 transitions. [2023-11-24 21:56:40,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:40,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 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 294 [2023-11-24 21:56:40,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:40,379 INFO L225 Difference]: With dead ends: 19647 [2023-11-24 21:56:40,379 INFO L226 Difference]: Without dead ends: 10007 [2023-11-24 21:56:40,391 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 [2023-11-24 21:56:40,392 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 170 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:40,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 301 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 21:56:40,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10007 states. [2023-11-24 21:56:40,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10007 to 10007. [2023-11-24 21:56:40,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10007 states, 10006 states have (on average 1.1505096941834898) internal successors, (11512), 10006 states have internal predecessors, (11512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:40,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10007 states to 10007 states and 11512 transitions. [2023-11-24 21:56:40,641 INFO L78 Accepts]: Start accepts. Automaton has 10007 states and 11512 transitions. Word has length 294 [2023-11-24 21:56:40,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:40,642 INFO L495 AbstractCegarLoop]: Abstraction has 10007 states and 11512 transitions. [2023-11-24 21:56:40,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:40,643 INFO L276 IsEmpty]: Start isEmpty. Operand 10007 states and 11512 transitions. [2023-11-24 21:56:40,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2023-11-24 21:56:40,652 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:40,653 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:40,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:56:40,654 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:56:40,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:40,655 INFO L85 PathProgramCache]: Analyzing trace with hash 198848853, now seen corresponding path program 1 times [2023-11-24 21:56:40,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:40,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138267508] [2023-11-24 21:56:40,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:40,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:40,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:41,363 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 125 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:41,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:41,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138267508] [2023-11-24 21:56:41,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138267508] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:56:41,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686186329] [2023-11-24 21:56:41,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:41,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:41,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:56:41,365 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:56:41,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:56:41,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:41,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:56:41,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:41,925 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:41,926 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:56:41,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686186329] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:41,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:56:41,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-24 21:56:41,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113480127] [2023-11-24 21:56:41,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:41,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:41,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:41,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:41,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:56:41,929 INFO L87 Difference]: Start difference. First operand 10007 states and 11512 transitions. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:42,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:42,933 INFO L93 Difference]: Finished difference Result 20953 states and 24250 transitions. [2023-11-24 21:56:42,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:42,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 297 [2023-11-24 21:56:42,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:42,955 INFO L225 Difference]: With dead ends: 20953 [2023-11-24 21:56:42,955 INFO L226 Difference]: Without dead ends: 11315 [2023-11-24 21:56:42,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:56:42,968 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 99 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:42,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 323 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 21:56:42,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11315 states. [2023-11-24 21:56:43,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11315 to 11306. [2023-11-24 21:56:43,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11306 states, 11305 states have (on average 1.151702786377709) internal successors, (13020), 11305 states have internal predecessors, (13020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:43,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11306 states to 11306 states and 13020 transitions. [2023-11-24 21:56:43,299 INFO L78 Accepts]: Start accepts. Automaton has 11306 states and 13020 transitions. Word has length 297 [2023-11-24 21:56:43,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:43,302 INFO L495 AbstractCegarLoop]: Abstraction has 11306 states and 13020 transitions. [2023-11-24 21:56:43,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:43,302 INFO L276 IsEmpty]: Start isEmpty. Operand 11306 states and 13020 transitions. [2023-11-24 21:56:43,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2023-11-24 21:56:43,313 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:43,313 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:43,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:56:43,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:43,519 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:56:43,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:43,520 INFO L85 PathProgramCache]: Analyzing trace with hash 361647999, now seen corresponding path program 1 times [2023-11-24 21:56:43,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:43,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869797591] [2023-11-24 21:56:43,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:43,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:43,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:44,129 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2023-11-24 21:56:44,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:44,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869797591] [2023-11-24 21:56:44,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869797591] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:56:44,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471199448] [2023-11-24 21:56:44,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:44,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:44,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:56:44,131 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:56:44,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:56:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:44,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:56:44,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:44,734 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2023-11-24 21:56:44,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:56:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2023-11-24 21:56:46,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471199448] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-24 21:56:46,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:56:46,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2023-11-24 21:56:46,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144965101] [2023-11-24 21:56:46,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:46,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:56:46,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:46,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:56:46,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:56:46,748 INFO L87 Difference]: Start difference. First operand 11306 states and 13020 transitions. Second operand has 4 states, 4 states have (on average 48.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:48,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:48,886 INFO L93 Difference]: Finished difference Result 18342 states and 21258 transitions. [2023-11-24 21:56:48,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:56:48,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 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 302 [2023-11-24 21:56:48,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:48,927 INFO L225 Difference]: With dead ends: 18342 [2023-11-24 21:56:48,928 INFO L226 Difference]: Without dead ends: 18340 [2023-11-24 21:56:48,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 601 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:56:48,932 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 262 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:48,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 204 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-24 21:56:48,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18340 states. [2023-11-24 21:56:49,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18340 to 12778. [2023-11-24 21:56:49,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12778 states, 12777 states have (on average 1.1523831885419114) internal successors, (14724), 12777 states have internal predecessors, (14724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:49,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12778 states to 12778 states and 14724 transitions. [2023-11-24 21:56:49,231 INFO L78 Accepts]: Start accepts. Automaton has 12778 states and 14724 transitions. Word has length 302 [2023-11-24 21:56:49,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:49,232 INFO L495 AbstractCegarLoop]: Abstraction has 12778 states and 14724 transitions. [2023-11-24 21:56:49,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:49,232 INFO L276 IsEmpty]: Start isEmpty. Operand 12778 states and 14724 transitions. [2023-11-24 21:56:49,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2023-11-24 21:56:49,245 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:49,245 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:49,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:56:49,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-24 21:56:49,454 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:56:49,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:49,454 INFO L85 PathProgramCache]: Analyzing trace with hash 455318777, now seen corresponding path program 1 times [2023-11-24 21:56:49,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:49,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833757378] [2023-11-24 21:56:49,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:49,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:49,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:50,230 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 55 proven. 70 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-11-24 21:56:50,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:50,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833757378] [2023-11-24 21:56:50,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833757378] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:56:50,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911193155] [2023-11-24 21:56:50,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:50,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:50,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:56:50,233 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:56:50,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:56:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:50,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 21:56:50,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-11-24 21:56:50,573 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:56:50,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911193155] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:50,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:56:50,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-24 21:56:50,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654559076] [2023-11-24 21:56:50,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:50,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:50,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:50,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:50,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:56:50,577 INFO L87 Difference]: Start difference. First operand 12778 states and 14724 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:51,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:51,722 INFO L93 Difference]: Finished difference Result 28130 states and 32516 transitions. [2023-11-24 21:56:51,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:51,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 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 326 [2023-11-24 21:56:51,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:51,761 INFO L225 Difference]: With dead ends: 28130 [2023-11-24 21:56:51,762 INFO L226 Difference]: Without dead ends: 15721 [2023-11-24 21:56:51,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:56:51,779 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 133 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:51,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 366 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 21:56:51,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15721 states. [2023-11-24 21:56:52,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15721 to 14617. [2023-11-24 21:56:52,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14617 states, 14616 states have (on average 1.1441570881226053) internal successors, (16723), 14616 states have internal predecessors, (16723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:52,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14617 states to 14617 states and 16723 transitions. [2023-11-24 21:56:52,106 INFO L78 Accepts]: Start accepts. Automaton has 14617 states and 16723 transitions. Word has length 326 [2023-11-24 21:56:52,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:52,107 INFO L495 AbstractCegarLoop]: Abstraction has 14617 states and 16723 transitions. [2023-11-24 21:56:52,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:52,108 INFO L276 IsEmpty]: Start isEmpty. Operand 14617 states and 16723 transitions. [2023-11-24 21:56:52,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2023-11-24 21:56:52,125 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:52,125 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:52,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:56:52,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-24 21:56:52,333 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:56:52,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:52,333 INFO L85 PathProgramCache]: Analyzing trace with hash 397430061, now seen corresponding path program 1 times [2023-11-24 21:56:52,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:52,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622817445] [2023-11-24 21:56:52,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:52,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:52,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 281 proven. 27 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2023-11-24 21:56:53,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:53,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622817445] [2023-11-24 21:56:53,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622817445] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:56:53,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231178105] [2023-11-24 21:56:53,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:53,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:53,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:56:53,715 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:56:53,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:56:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:53,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 21:56:53,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:54,285 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 362 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-24 21:56:54,285 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:56:54,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231178105] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:54,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:56:54,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-24 21:56:54,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693747214] [2023-11-24 21:56:54,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:54,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:54,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:54,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:54,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:56:54,289 INFO L87 Difference]: Start difference. First operand 14617 states and 16723 transitions. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:55,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:55,332 INFO L93 Difference]: Finished difference Result 30530 states and 34951 transitions. [2023-11-24 21:56:55,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:55,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 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 351 [2023-11-24 21:56:55,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:55,369 INFO L225 Difference]: With dead ends: 30530 [2023-11-24 21:56:55,369 INFO L226 Difference]: Without dead ends: 16282 [2023-11-24 21:56:55,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:56:55,388 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 84 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:55,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 366 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 21:56:55,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16282 states. [2023-11-24 21:56:55,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16282 to 15359. [2023-11-24 21:56:55,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15359 states, 15358 states have (on average 1.14051308764162) internal successors, (17516), 15358 states have internal predecessors, (17516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:55,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15359 states to 15359 states and 17516 transitions. [2023-11-24 21:56:55,671 INFO L78 Accepts]: Start accepts. Automaton has 15359 states and 17516 transitions. Word has length 351 [2023-11-24 21:56:55,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:55,671 INFO L495 AbstractCegarLoop]: Abstraction has 15359 states and 17516 transitions. [2023-11-24 21:56:55,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:55,672 INFO L276 IsEmpty]: Start isEmpty. Operand 15359 states and 17516 transitions. [2023-11-24 21:56:55,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2023-11-24 21:56:55,689 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:55,689 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:55,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:56:55,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-24 21:56:55,898 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:56:55,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:55,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1701082308, now seen corresponding path program 1 times [2023-11-24 21:56:55,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:55,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780866706] [2023-11-24 21:56:55,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:55,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:57,416 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 208 proven. 168 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-11-24 21:56:57,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:57,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780866706] [2023-11-24 21:56:57,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780866706] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:56:57,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050602652] [2023-11-24 21:56:57,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:57,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:57,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:56:57,425 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:56:57,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:56:57,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:57,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 21:56:57,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:57,969 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 383 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2023-11-24 21:56:57,970 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:56:57,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050602652] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:57,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:56:57,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-24 21:56:57,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487873970] [2023-11-24 21:56:57,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:57,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:57,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:57,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:57,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:56:57,973 INFO L87 Difference]: Start difference. First operand 15359 states and 17516 transitions. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:58,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:58,978 INFO L93 Difference]: Finished difference Result 30719 states and 35027 transitions. [2023-11-24 21:56:58,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:58,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 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 372 [2023-11-24 21:56:58,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:59,005 INFO L225 Difference]: With dead ends: 30719 [2023-11-24 21:56:59,006 INFO L226 Difference]: Without dead ends: 15361 [2023-11-24 21:56:59,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:56:59,017 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 90 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:59,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 168 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 21:56:59,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15361 states. [2023-11-24 21:56:59,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15361 to 14255. [2023-11-24 21:56:59,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14255 states, 14254 states have (on average 1.134979654833731) internal successors, (16178), 14254 states have internal predecessors, (16178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:59,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14255 states to 14255 states and 16178 transitions. [2023-11-24 21:56:59,255 INFO L78 Accepts]: Start accepts. Automaton has 14255 states and 16178 transitions. Word has length 372 [2023-11-24 21:56:59,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:59,255 INFO L495 AbstractCegarLoop]: Abstraction has 14255 states and 16178 transitions. [2023-11-24 21:56:59,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:59,256 INFO L276 IsEmpty]: Start isEmpty. Operand 14255 states and 16178 transitions. [2023-11-24 21:56:59,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2023-11-24 21:56:59,274 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:59,274 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2023-11-24 21:56:59,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 21:56:59,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12fe4e4b-4f2d-46c8-8949-281e65cd3871/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-24 21:56:59,485 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:56:59,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:59,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1513559014, now seen corresponding path program 1 times [2023-11-24 21:56:59,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:59,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362018770] [2023-11-24 21:56:59,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:59,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:59,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat