./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label13.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_a88223fc-db62-4495-beff-f40e0a3a5331/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88223fc-db62-4495-beff-f40e0a3a5331/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88223fc-db62-4495-beff-f40e0a3a5331/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88223fc-db62-4495-beff-f40e0a3a5331/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label13.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88223fc-db62-4495-beff-f40e0a3a5331/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88223fc-db62-4495-beff-f40e0a3a5331/bin/uautomizer-verify-VRDe98Ueme --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 b7385fd88a67a4d51b868c33a4a2a17411348aca1f3bf817148857f9693eef2c
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-11-26 10:41:47,374 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-26 10:41:47,445 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88223fc-db62-4495-beff-f40e0a3a5331/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf
[2023-11-26 10:41:47,451 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-26 10:41:47,452 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-26 10:41:47,488 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-26 10:41:47,490 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-26 10:41:47,491 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-26 10:41:47,492 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-26 10:41:47,497 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-26 10:41:47,497 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-26 10:41:47,498 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-26 10:41:47,499 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-26 10:41:47,500 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-26 10:41:47,501 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-26 10:41:47,501 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-26 10:41:47,502 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-26 10:41:47,502 INFO  L153        SettingsManager]:  * sizeof long=4
[2023-11-26 10:41:47,503 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-26 10:41:47,503 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2023-11-26 10:41:47,504 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-26 10:41:47,504 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-26 10:41:47,505 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-26 10:41:47,505 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-26 10:41:47,506 INFO  L153        SettingsManager]:  * sizeof long double=12
[2023-11-26 10:41:47,506 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-26 10:41:47,507 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-26 10:41:47,508 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-26 10:41:47,508 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-26 10:41:47,509 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-26 10:41:47,510 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-26 10:41:47,510 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-26 10:41:47,511 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-26 10:41:47,511 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-26 10:41:47,511 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-26 10:41:47,511 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-26 10:41:47,512 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-26 10:41:47,512 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-26 10:41:47,512 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-26 10:41:47,513 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-26 10:41:47,513 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-26 10:41:47,518 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-26 10:41:47,518 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_a88223fc-db62-4495-beff-f40e0a3a5331/bin/uautomizer-verify-VRDe98Ueme/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_a88223fc-db62-4495-beff-f40e0a3a5331/bin/uautomizer-verify-VRDe98Ueme
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 -> b7385fd88a67a4d51b868c33a4a2a17411348aca1f3bf817148857f9693eef2c
[2023-11-26 10:41:47,817 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-26 10:41:47,860 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-26 10:41:47,863 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-26 10:41:47,864 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-26 10:41:47,864 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-26 10:41:47,866 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88223fc-db62-4495-beff-f40e0a3a5331/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/eca-rers2012/Problem13_label13.c
[2023-11-26 10:41:50,971 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-26 10:41:51,736 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-26 10:41:51,737 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88223fc-db62-4495-beff-f40e0a3a5331/sv-benchmarks/c/eca-rers2012/Problem13_label13.c
[2023-11-26 10:41:51,772 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88223fc-db62-4495-beff-f40e0a3a5331/bin/uautomizer-verify-VRDe98Ueme/data/9d5b8a84c/42b3ba741dea43f59193f4c8fff6e15f/FLAGbc04fbe62
[2023-11-26 10:41:51,789 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88223fc-db62-4495-beff-f40e0a3a5331/bin/uautomizer-verify-VRDe98Ueme/data/9d5b8a84c/42b3ba741dea43f59193f4c8fff6e15f
[2023-11-26 10:41:51,800 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-26 10:41:51,803 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-26 10:41:51,808 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-26 10:41:51,809 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-26 10:41:51,815 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-26 10:41:51,816 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:41:51" (1/1) ...
[2023-11-26 10:41:51,817 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16efb0f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:51, skipping insertion in model container
[2023-11-26 10:41:51,817 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:41:51" (1/1) ...
[2023-11-26 10:41:52,058 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-26 10:41:52,378 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_a88223fc-db62-4495-beff-f40e0a3a5331/sv-benchmarks/c/eca-rers2012/Problem13_label13.c[8099,8112]
[2023-11-26 10:41:53,603 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-26 10:41:53,616 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-26 10:41:53,651 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_a88223fc-db62-4495-beff-f40e0a3a5331/sv-benchmarks/c/eca-rers2012/Problem13_label13.c[8099,8112]
[2023-11-26 10:41:54,303 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-26 10:41:54,332 INFO  L206         MainTranslator]: Completed translation
[2023-11-26 10:41:54,333 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:54 WrapperNode
[2023-11-26 10:41:54,333 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-26 10:41:54,335 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-26 10:41:54,335 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-26 10:41:54,335 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-26 10:41:54,343 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:54" (1/1) ...
[2023-11-26 10:41:54,458 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:54" (1/1) ...
[2023-11-26 10:41:55,075 INFO  L138                Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5584
[2023-11-26 10:41:55,076 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-26 10:41:55,077 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-26 10:41:55,077 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-26 10:41:55,077 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-26 10:41:55,088 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:54" (1/1) ...
[2023-11-26 10:41:55,088 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:54" (1/1) ...
[2023-11-26 10:41:55,346 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:54" (1/1) ...
[2023-11-26 10:41:55,687 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].
[2023-11-26 10:41:55,688 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:54" (1/1) ...
[2023-11-26 10:41:55,688 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:54" (1/1) ...
[2023-11-26 10:41:56,075 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:54" (1/1) ...
[2023-11-26 10:41:56,112 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:54" (1/1) ...
[2023-11-26 10:41:56,166 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:54" (1/1) ...
[2023-11-26 10:41:56,187 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:54" (1/1) ...
[2023-11-26 10:41:56,248 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-26 10:41:56,250 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-26 10:41:56,250 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-26 10:41:56,251 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-26 10:41:56,252 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:54" (1/1) ...
[2023-11-26 10:41:56,258 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-26 10:41:56,271 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88223fc-db62-4495-beff-f40e0a3a5331/bin/uautomizer-verify-VRDe98Ueme/z3
[2023-11-26 10:41:56,291 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88223fc-db62-4495-beff-f40e0a3a5331/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2023-11-26 10:41:56,305 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88223fc-db62-4495-beff-f40e0a3a5331/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2023-11-26 10:41:56,331 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-26 10:41:56,331 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-11-26 10:41:56,331 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-26 10:41:56,332 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-26 10:41:56,423 INFO  L241             CfgBuilder]: Building ICFG
[2023-11-26 10:41:56,427 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-26 10:42:03,754 INFO  L282             CfgBuilder]: Performing block encoding
[2023-11-26 10:42:03,840 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-26 10:42:03,842 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-26 10:42:03,843 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:42:03 BoogieIcfgContainer
[2023-11-26 10:42:03,843 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-26 10:42:03,846 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-26 10:42:03,847 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-26 10:42:03,850 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-26 10:42:03,850 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:41:51" (1/3) ...
[2023-11-26 10:42:03,853 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7989a7d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:42:03, skipping insertion in model container
[2023-11-26 10:42:03,853 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:54" (2/3) ...
[2023-11-26 10:42:03,853 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7989a7d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:42:03, skipping insertion in model container
[2023-11-26 10:42:03,854 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:42:03" (3/3) ...
[2023-11-26 10:42:03,856 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem13_label13.c
[2023-11-26 10:42:03,877 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-26 10:42:03,877 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-26 10:42:03,973 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-26 10:42:03,982 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;@369334c6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-26 10:42:03,982 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-26 10:42:03,995 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 1036 states, 1034 states have (on average 1.877176015473888) internal successors, (1941), 1035 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 10:42:04,005 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2023-11-26 10:42:04,006 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 10:42:04,007 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]
[2023-11-26 10:42:04,008 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 10:42:04,016 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 10:42:04,016 INFO  L85        PathProgramCache]: Analyzing trace with hash -1341323251, now seen corresponding path program 1 times
[2023-11-26 10:42:04,026 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 10:42:04,026 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300492936]
[2023-11-26 10:42:04,027 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 10:42:04,027 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 10:42:04,153 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 10:42:04,288 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-26 10:42:04,289 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 10:42:04,289 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300492936]
[2023-11-26 10:42:04,290 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300492936] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 10:42:04,290 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 10:42:04,290 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-26 10:42:04,292 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089667246]
[2023-11-26 10:42:04,294 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 10:42:04,298 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2023-11-26 10:42:04,300 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 10:42:04,339 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2023-11-26 10:42:04,340 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2023-11-26 10:42:04,346 INFO  L87              Difference]: Start difference. First operand  has 1036 states, 1034 states have (on average 1.877176015473888) internal successors, (1941), 1035 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 10:42:04,495 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 10:42:04,495 INFO  L93              Difference]: Finished difference Result 2071 states and 3881 transitions.
[2023-11-26 10:42:04,496 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2023-11-26 10:42:04,498 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 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 56
[2023-11-26 10:42:04,498 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 10:42:04,518 INFO  L225             Difference]: With dead ends: 2071
[2023-11-26 10:42:04,519 INFO  L226             Difference]: Without dead ends: 1034
[2023-11-26 10:42:04,527 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
[2023-11-26 10:42:04,531 INFO  L413           NwaCegarLoop]: 1876 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1876 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-26 10:42:04,532 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1876 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-26 10:42:04,552 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1034 states.
[2023-11-26 10:42:04,613 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 1034.
[2023-11-26 10:42:04,617 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1034 states, 1033 states have (on average 1.8160696999031947) internal successors, (1876), 1033 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 10:42:04,623 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1876 transitions.
[2023-11-26 10:42:04,624 INFO  L78                 Accepts]: Start accepts. Automaton has 1034 states and 1876 transitions. Word has length 56
[2023-11-26 10:42:04,624 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 10:42:04,625 INFO  L495      AbstractCegarLoop]: Abstraction has 1034 states and 1876 transitions.
[2023-11-26 10:42:04,625 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 10:42:04,625 INFO  L276                IsEmpty]: Start isEmpty. Operand 1034 states and 1876 transitions.
[2023-11-26 10:42:04,627 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2023-11-26 10:42:04,627 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 10:42:04,628 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]
[2023-11-26 10:42:04,628 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-26 10:42:04,628 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 10:42:04,629 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 10:42:04,629 INFO  L85        PathProgramCache]: Analyzing trace with hash 512037456, now seen corresponding path program 1 times
[2023-11-26 10:42:04,629 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 10:42:04,630 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919978924]
[2023-11-26 10:42:04,630 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 10:42:04,630 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 10:42:04,665 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 10:42:05,200 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-26 10:42:05,201 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 10:42:05,201 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919978924]
[2023-11-26 10:42:05,202 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919978924] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 10:42:05,202 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 10:42:05,203 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-26 10:42:05,203 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604022126]
[2023-11-26 10:42:05,204 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 10:42:05,206 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-26 10:42:05,207 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 10:42:05,210 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-26 10:42:05,211 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-26 10:42:05,213 INFO  L87              Difference]: Start difference. First operand 1034 states and 1876 transitions. Second operand  has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 10:42:14,711 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 10:42:14,711 INFO  L93              Difference]: Finished difference Result 3696 states and 6823 transitions.
[2023-11-26 10:42:14,712 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-26 10:42:14,713 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 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 56
[2023-11-26 10:42:14,713 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 10:42:14,732 INFO  L225             Difference]: With dead ends: 3696
[2023-11-26 10:42:14,733 INFO  L226             Difference]: Without dead ends: 2663
[2023-11-26 10:42:14,735 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-26 10:42:14,737 INFO  L413           NwaCegarLoop]: 717 mSDtfsCounter, 2648 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 4127 mSolverCounterSat, 1487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2648 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 5614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1487 IncrementalHoareTripleChecker+Valid, 4127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time
[2023-11-26 10:42:14,738 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [2648 Valid, 1017 Invalid, 5614 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1487 Valid, 4127 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time]
[2023-11-26 10:42:14,746 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2663 states.
[2023-11-26 10:42:14,820 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2663 to 2662.
[2023-11-26 10:42:14,827 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2662 states, 2661 states have (on average 1.4611048478015785) internal successors, (3888), 2661 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 10:42:14,847 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 3888 transitions.
[2023-11-26 10:42:14,848 INFO  L78                 Accepts]: Start accepts. Automaton has 2662 states and 3888 transitions. Word has length 56
[2023-11-26 10:42:14,848 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 10:42:14,849 INFO  L495      AbstractCegarLoop]: Abstraction has 2662 states and 3888 transitions.
[2023-11-26 10:42:14,849 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 10:42:14,850 INFO  L276                IsEmpty]: Start isEmpty. Operand 2662 states and 3888 transitions.
[2023-11-26 10:42:14,867 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 182
[2023-11-26 10:42:14,868 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 10:42:14,869 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 10:42:14,870 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-26 10:42:14,870 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 10:42:14,872 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 10:42:14,877 INFO  L85        PathProgramCache]: Analyzing trace with hash -846158056, now seen corresponding path program 1 times
[2023-11-26 10:42:14,877 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 10:42:14,877 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64045329]
[2023-11-26 10:42:14,878 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 10:42:14,878 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 10:42:14,993 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 10:42:15,396 INFO  L134       CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked.
[2023-11-26 10:42:15,397 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 10:42:15,398 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64045329]
[2023-11-26 10:42:15,398 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64045329] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 10:42:15,399 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 10:42:15,399 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-26 10:42:15,399 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671174570]
[2023-11-26 10:42:15,400 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 10:42:15,401 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 10:42:15,402 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 10:42:15,403 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 10:42:15,408 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 10:42:15,409 INFO  L87              Difference]: Start difference. First operand 2662 states and 3888 transitions. Second operand  has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 10:42:21,607 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 10:42:21,607 INFO  L93              Difference]: Finished difference Result 6141 states and 9711 transitions.
[2023-11-26 10:42:21,608 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 10:42:21,609 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181
[2023-11-26 10:42:21,610 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 10:42:21,639 INFO  L225             Difference]: With dead ends: 6141
[2023-11-26 10:42:21,640 INFO  L226             Difference]: Without dead ends: 4267
[2023-11-26 10:42:21,649 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
[2023-11-26 10:42:21,652 INFO  L413           NwaCegarLoop]: 1037 mSDtfsCounter, 743 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 2509 mSolverCounterSat, 778 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 3287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 778 IncrementalHoareTripleChecker+Valid, 2509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time
[2023-11-26 10:42:21,656 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [743 Valid, 1186 Invalid, 3287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [778 Valid, 2509 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time]
[2023-11-26 10:42:21,671 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4267 states.
[2023-11-26 10:42:21,756 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4267 to 4253.
[2023-11-26 10:42:21,767 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4253 states, 4252 states have (on average 1.351599247412982) internal successors, (5747), 4252 states have internal predecessors, (5747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 10:42:21,781 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4253 states to 4253 states and 5747 transitions.
[2023-11-26 10:42:21,782 INFO  L78                 Accepts]: Start accepts. Automaton has 4253 states and 5747 transitions. Word has length 181
[2023-11-26 10:42:21,783 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 10:42:21,783 INFO  L495      AbstractCegarLoop]: Abstraction has 4253 states and 5747 transitions.
[2023-11-26 10:42:21,783 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 10:42:21,784 INFO  L276                IsEmpty]: Start isEmpty. Operand 4253 states and 5747 transitions.
[2023-11-26 10:42:21,787 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 224
[2023-11-26 10:42:21,788 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 10:42:21,788 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 10:42:21,789 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-26 10:42:21,789 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 10:42:21,790 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 10:42:21,790 INFO  L85        PathProgramCache]: Analyzing trace with hash -587684820, now seen corresponding path program 1 times
[2023-11-26 10:42:21,790 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 10:42:21,790 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892255041]
[2023-11-26 10:42:21,791 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 10:42:21,791 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 10:42:21,867 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 10:42:22,143 INFO  L134       CoverageAnalysis]: Checked inductivity of 179 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked.
[2023-11-26 10:42:22,143 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 10:42:22,143 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892255041]
[2023-11-26 10:42:22,144 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892255041] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 10:42:22,144 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 10:42:22,145 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-26 10:42:22,146 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313767828]
[2023-11-26 10:42:22,146 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 10:42:22,147 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 10:42:22,148 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 10:42:22,149 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 10:42:22,149 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 10:42:22,150 INFO  L87              Difference]: Start difference. First operand 4253 states and 5747 transitions. Second operand  has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 10:42:27,544 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 10:42:27,545 INFO  L93              Difference]: Finished difference Result 10896 states and 15273 transitions.
[2023-11-26 10:42:27,545 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 10:42:27,545 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 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 223
[2023-11-26 10:42:27,546 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 10:42:27,594 INFO  L225             Difference]: With dead ends: 10896
[2023-11-26 10:42:27,594 INFO  L226             Difference]: Without dead ends: 7431
[2023-11-26 10:42:27,599 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
[2023-11-26 10:42:27,601 INFO  L413           NwaCegarLoop]: 822 mSDtfsCounter, 905 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 2568 mSolverCounterSat, 755 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 3323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 755 IncrementalHoareTripleChecker+Valid, 2568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time
[2023-11-26 10:42:27,601 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [905 Valid, 953 Invalid, 3323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [755 Valid, 2568 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time]
[2023-11-26 10:42:27,613 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7431 states.
[2023-11-26 10:42:27,753 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7431 to 7425.
[2023-11-26 10:42:27,770 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7425 states, 7424 states have (on average 1.288927801724138) internal successors, (9569), 7424 states have internal predecessors, (9569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 10:42:27,790 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7425 states to 7425 states and 9569 transitions.
[2023-11-26 10:42:27,791 INFO  L78                 Accepts]: Start accepts. Automaton has 7425 states and 9569 transitions. Word has length 223
[2023-11-26 10:42:27,791 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 10:42:27,792 INFO  L495      AbstractCegarLoop]: Abstraction has 7425 states and 9569 transitions.
[2023-11-26 10:42:27,792 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 10:42:27,792 INFO  L276                IsEmpty]: Start isEmpty. Operand 7425 states and 9569 transitions.
[2023-11-26 10:42:27,801 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 238
[2023-11-26 10:42:27,801 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 10:42:27,802 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 10:42:27,802 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-11-26 10:42:27,802 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 10:42:27,803 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 10:42:27,803 INFO  L85        PathProgramCache]: Analyzing trace with hash -867165233, now seen corresponding path program 1 times
[2023-11-26 10:42:27,803 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 10:42:27,803 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079335659]
[2023-11-26 10:42:27,804 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 10:42:27,804 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 10:42:27,892 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 10:42:28,175 INFO  L134       CoverageAnalysis]: Checked inductivity of 193 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked.
[2023-11-26 10:42:28,175 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 10:42:28,176 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079335659]
[2023-11-26 10:42:28,177 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079335659] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 10:42:28,177 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 10:42:28,178 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-26 10:42:28,178 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113861962]
[2023-11-26 10:42:28,178 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 10:42:28,179 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 10:42:28,179 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 10:42:28,180 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 10:42:28,180 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 10:42:28,180 INFO  L87              Difference]: Start difference. First operand 7425 states and 9569 transitions. Second operand  has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 10:42:33,410 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 10:42:33,410 INFO  L93              Difference]: Finished difference Result 19618 states and 25903 transitions.
[2023-11-26 10:42:33,411 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 10:42:33,411 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 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 237
[2023-11-26 10:42:33,411 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 10:42:33,474 INFO  L225             Difference]: With dead ends: 19618
[2023-11-26 10:42:33,474 INFO  L226             Difference]: Without dead ends: 12981
[2023-11-26 10:42:33,484 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
[2023-11-26 10:42:33,486 INFO  L413           NwaCegarLoop]: 471 mSDtfsCounter, 907 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 2890 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 3430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 2890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time
[2023-11-26 10:42:33,486 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [907 Valid, 635 Invalid, 3430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 2890 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time]
[2023-11-26 10:42:33,505 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12981 states.
[2023-11-26 10:42:33,739 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12981 to 12974.
[2023-11-26 10:42:33,775 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12974 states, 12973 states have (on average 1.2719494334386803) internal successors, (16501), 12973 states have internal predecessors, (16501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 10:42:33,818 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12974 states to 12974 states and 16501 transitions.
[2023-11-26 10:42:33,819 INFO  L78                 Accepts]: Start accepts. Automaton has 12974 states and 16501 transitions. Word has length 237
[2023-11-26 10:42:33,819 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 10:42:33,820 INFO  L495      AbstractCegarLoop]: Abstraction has 12974 states and 16501 transitions.
[2023-11-26 10:42:33,820 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 10:42:33,821 INFO  L276                IsEmpty]: Start isEmpty. Operand 12974 states and 16501 transitions.
[2023-11-26 10:42:33,826 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 254
[2023-11-26 10:42:33,827 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 10:42:33,827 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 10:42:33,827 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2023-11-26 10:42:33,828 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 10:42:33,828 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 10:42:33,828 INFO  L85        PathProgramCache]: Analyzing trace with hash -806435540, now seen corresponding path program 1 times
[2023-11-26 10:42:33,829 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 10:42:33,829 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480111220]
[2023-11-26 10:42:33,829 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 10:42:33,829 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 10:42:33,901 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 10:42:34,197 INFO  L134       CoverageAnalysis]: Checked inductivity of 180 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked.
[2023-11-26 10:42:34,197 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 10:42:34,198 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480111220]
[2023-11-26 10:42:34,198 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480111220] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 10:42:34,198 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 10:42:34,198 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-26 10:42:34,199 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879888213]
[2023-11-26 10:42:34,199 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 10:42:34,199 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 10:42:34,200 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 10:42:34,200 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 10:42:34,201 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 10:42:34,201 INFO  L87              Difference]: Start difference. First operand 12974 states and 16501 transitions. Second operand  has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)