./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label48.c --full-output --architecture 32bit


--------------------------------------------------------------------------------


Checking for ERROR reachability
Using default analysis
Version 0e0057cc
Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a705d-2d84-4e3a-ba89-f267a203e97b/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a705d-2d84-4e3a-ba89-f267a203e97b/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_a51a705d-2d84-4e3a-ba89-f267a203e97b/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a705d-2d84-4e3a-ba89-f267a203e97b/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label48.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a705d-2d84-4e3a-ba89-f267a203e97b/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_a51a705d-2d84-4e3a-ba89-f267a203e97b/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 c03a342c0e8f0bfba399e237ba210df18813842785480d8c5bf35ca28242fc9f
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-11-26 11:56:59,955 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-26 11:57:00,029 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a705d-2d84-4e3a-ba89-f267a203e97b/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf
[2023-11-26 11:57:00,034 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-26 11:57:00,035 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-26 11:57:00,060 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-26 11:57:00,061 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-26 11:57:00,062 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-26 11:57:00,062 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-26 11:57:00,063 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-26 11:57:00,064 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-26 11:57:00,064 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-26 11:57:00,065 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-26 11:57:00,066 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-26 11:57:00,066 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-26 11:57:00,067 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-26 11:57:00,068 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-26 11:57:00,068 INFO  L153        SettingsManager]:  * sizeof long=4
[2023-11-26 11:57:00,069 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-26 11:57:00,069 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2023-11-26 11:57:00,070 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-26 11:57:00,071 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-26 11:57:00,071 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-26 11:57:00,072 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-26 11:57:00,072 INFO  L153        SettingsManager]:  * sizeof long double=12
[2023-11-26 11:57:00,073 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-26 11:57:00,073 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-26 11:57:00,074 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-26 11:57:00,074 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-26 11:57:00,075 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-26 11:57:00,075 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-26 11:57:00,076 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-26 11:57:00,076 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-26 11:57:00,077 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-26 11:57:00,077 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-26 11:57:00,078 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-26 11:57:00,078 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-26 11:57:00,079 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-26 11:57:00,079 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-26 11:57:00,080 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-26 11:57:00,080 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-26 11:57:00,081 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-26 11:57:00,081 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_a51a705d-2d84-4e3a-ba89-f267a203e97b/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_a51a705d-2d84-4e3a-ba89-f267a203e97b/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 -> c03a342c0e8f0bfba399e237ba210df18813842785480d8c5bf35ca28242fc9f
[2023-11-26 11:57:00,330 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-26 11:57:00,364 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-26 11:57:00,367 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-26 11:57:00,369 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-26 11:57:00,370 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-26 11:57:00,371 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a705d-2d84-4e3a-ba89-f267a203e97b/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/eca-rers2012/Problem13_label48.c
[2023-11-26 11:57:03,693 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-26 11:57:04,280 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-26 11:57:04,281 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a705d-2d84-4e3a-ba89-f267a203e97b/sv-benchmarks/c/eca-rers2012/Problem13_label48.c
[2023-11-26 11:57:04,319 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a705d-2d84-4e3a-ba89-f267a203e97b/bin/uautomizer-verify-VRDe98Ueme/data/1d6201ac3/d939756afe584ff2974cf29c80e6c01e/FLAG0877617c7
[2023-11-26 11:57:04,338 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a705d-2d84-4e3a-ba89-f267a203e97b/bin/uautomizer-verify-VRDe98Ueme/data/1d6201ac3/d939756afe584ff2974cf29c80e6c01e
[2023-11-26 11:57:04,345 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-26 11:57:04,347 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-26 11:57:04,349 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-26 11:57:04,349 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-26 11:57:04,355 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-26 11:57:04,356 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:57:04" (1/1) ...
[2023-11-26 11:57:04,357 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@796e868f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:04, skipping insertion in model container
[2023-11-26 11:57:04,357 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:57:04" (1/1) ...
[2023-11-26 11:57:04,548 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-26 11:57:04,820 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_a51a705d-2d84-4e3a-ba89-f267a203e97b/sv-benchmarks/c/eca-rers2012/Problem13_label48.c[1234,1247]
[2023-11-26 11:57:06,088 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-26 11:57:06,106 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-26 11:57:06,126 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_a51a705d-2d84-4e3a-ba89-f267a203e97b/sv-benchmarks/c/eca-rers2012/Problem13_label48.c[1234,1247]
[2023-11-26 11:57:07,003 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-26 11:57:07,034 INFO  L206         MainTranslator]: Completed translation
[2023-11-26 11:57:07,035 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:07 WrapperNode
[2023-11-26 11:57:07,035 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-26 11:57:07,036 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-26 11:57:07,036 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-26 11:57:07,037 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-26 11:57:07,044 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:07" (1/1) ...
[2023-11-26 11:57:07,118 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:07" (1/1) ...
[2023-11-26 11:57:07,838 INFO  L138                Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5584
[2023-11-26 11:57:07,841 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-26 11:57:07,841 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-26 11:57:07,842 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-26 11:57:07,842 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-26 11:57:07,895 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:07" (1/1) ...
[2023-11-26 11:57:07,895 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:07" (1/1) ...
[2023-11-26 11:57:08,035 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:07" (1/1) ...
[2023-11-26 11:57:08,284 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 11:57:08,285 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:07" (1/1) ...
[2023-11-26 11:57:08,285 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:07" (1/1) ...
[2023-11-26 11:57:08,766 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:07" (1/1) ...
[2023-11-26 11:57:08,824 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:07" (1/1) ...
[2023-11-26 11:57:08,846 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:07" (1/1) ...
[2023-11-26 11:57:08,865 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:07" (1/1) ...
[2023-11-26 11:57:08,937 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-26 11:57:08,938 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-26 11:57:08,939 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-26 11:57:08,939 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-26 11:57:08,940 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:07" (1/1) ...
[2023-11-26 11:57:08,946 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-26 11:57:08,959 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a705d-2d84-4e3a-ba89-f267a203e97b/bin/uautomizer-verify-VRDe98Ueme/z3
[2023-11-26 11:57:08,974 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a705d-2d84-4e3a-ba89-f267a203e97b/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2023-11-26 11:57:08,990 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a705d-2d84-4e3a-ba89-f267a203e97b/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2023-11-26 11:57:09,017 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-26 11:57:09,018 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-11-26 11:57:09,018 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-26 11:57:09,018 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-26 11:57:09,117 INFO  L241             CfgBuilder]: Building ICFG
[2023-11-26 11:57:09,120 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-26 11:57:16,453 INFO  L282             CfgBuilder]: Performing block encoding
[2023-11-26 11:57:16,543 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-26 11:57:16,544 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-26 11:57:16,546 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:57:16 BoogieIcfgContainer
[2023-11-26 11:57:16,546 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-26 11:57:16,556 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-26 11:57:16,557 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-26 11:57:16,560 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-26 11:57:16,561 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:57:04" (1/3) ...
[2023-11-26 11:57:16,562 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b7ce03a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:57:16, skipping insertion in model container
[2023-11-26 11:57:16,562 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:07" (2/3) ...
[2023-11-26 11:57:16,562 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b7ce03a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:57:16, skipping insertion in model container
[2023-11-26 11:57:16,563 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:57:16" (3/3) ...
[2023-11-26 11:57:16,564 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem13_label48.c
[2023-11-26 11:57:16,586 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-26 11:57:16,586 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-26 11:57:16,729 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-26 11:57:16,738 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;@5482617, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-26 11:57:16,738 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-26 11:57:16,753 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 11:57:16,765 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6
[2023-11-26 11:57:16,765 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:57:16,766 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1]
[2023-11-26 11:57:16,768 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:57:16,777 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:57:16,777 INFO  L85        PathProgramCache]: Analyzing trace with hash 326675475, now seen corresponding path program 1 times
[2023-11-26 11:57:16,788 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:57:16,788 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260932876]
[2023-11-26 11:57:16,789 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:57:16,790 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:57:16,909 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:57:17,045 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 11:57:17,046 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:57:17,046 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260932876]
[2023-11-26 11:57:17,047 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260932876] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:57:17,048 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:57:17,048 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-26 11:57:17,050 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064843004]
[2023-11-26 11:57:17,052 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:57:17,057 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:57:17,058 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:57:17,104 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:57:17,105 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:57:17,111 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 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states 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 11:57:23,303 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:57:23,304 INFO  L93              Difference]: Finished difference Result 2911 states and 5519 transitions.
[2023-11-26 11:57:23,309 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 11:57:23,311 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5
[2023-11-26 11:57:23,311 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:57:23,361 INFO  L225             Difference]: With dead ends: 2911
[2023-11-26 11:57:23,361 INFO  L226             Difference]: Without dead ends: 1872
[2023-11-26 11:57:23,373 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 11:57:23,380 INFO  L413           NwaCegarLoop]: 940 mSDtfsCounter, 885 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2448 mSolverCounterSat, 798 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 3246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 798 IncrementalHoareTripleChecker+Valid, 2448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time
[2023-11-26 11:57:23,382 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [885 Valid, 1092 Invalid, 3246 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [798 Valid, 2448 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time]
[2023-11-26 11:57:23,411 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1872 states.
[2023-11-26 11:57:23,548 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1858.
[2023-11-26 11:57:23,555 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1858 states, 1857 states have (on average 1.5444264943457189) internal successors, (2868), 1857 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states 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 11:57:23,566 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 2868 transitions.
[2023-11-26 11:57:23,567 INFO  L78                 Accepts]: Start accepts. Automaton has 1858 states and 2868 transitions. Word has length 5
[2023-11-26 11:57:23,568 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:57:23,568 INFO  L495      AbstractCegarLoop]: Abstraction has 1858 states and 2868 transitions.
[2023-11-26 11:57:23,568 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states 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 11:57:23,568 INFO  L276                IsEmpty]: Start isEmpty. Operand 1858 states and 2868 transitions.
[2023-11-26 11:57:23,571 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 78
[2023-11-26 11:57:23,572 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:57:23,572 INFO  L195           NwaCegarLoop]: trace histogram [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]
[2023-11-26 11:57:23,572 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-26 11:57:23,573 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:57:23,574 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:57:23,574 INFO  L85        PathProgramCache]: Analyzing trace with hash 247773310, now seen corresponding path program 1 times
[2023-11-26 11:57:23,574 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:57:23,575 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888875005]
[2023-11-26 11:57:23,575 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:57:23,575 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:57:23,700 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:57:24,096 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-26 11:57:24,097 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:57:24,097 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888875005]
[2023-11-26 11:57:24,098 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888875005] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:57:24,098 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:57:24,099 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-26 11:57:24,099 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180148366]
[2023-11-26 11:57:24,100 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:57:24,103 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:57:24,108 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:57:24,109 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:57:24,109 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:57:24,110 INFO  L87              Difference]: Start difference. First operand 1858 states and 2868 transitions. Second operand  has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 11:57:29,817 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:57:29,818 INFO  L93              Difference]: Finished difference Result 5316 states and 8228 transitions.
[2023-11-26 11:57:29,818 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 11:57:29,818 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 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 77
[2023-11-26 11:57:29,819 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:57:29,839 INFO  L225             Difference]: With dead ends: 5316
[2023-11-26 11:57:29,840 INFO  L226             Difference]: Without dead ends: 3459
[2023-11-26 11:57:29,843 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 11:57:29,844 INFO  L413           NwaCegarLoop]: 1037 mSDtfsCounter, 826 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2403 mSolverCounterSat, 877 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 3280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 877 IncrementalHoareTripleChecker+Valid, 2403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time
[2023-11-26 11:57:29,845 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [826 Valid, 1190 Invalid, 3280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [877 Valid, 2403 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time]
[2023-11-26 11:57:29,851 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3459 states.
[2023-11-26 11:57:29,913 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3459 to 3458.
[2023-11-26 11:57:29,921 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3458 states, 3457 states have (on average 1.380676887474689) internal successors, (4773), 3457 states have internal predecessors, (4773), 0 states have call successors, (0), 0 states 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 11:57:29,931 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3458 states to 3458 states and 4773 transitions.
[2023-11-26 11:57:29,932 INFO  L78                 Accepts]: Start accepts. Automaton has 3458 states and 4773 transitions. Word has length 77
[2023-11-26 11:57:29,932 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:57:29,932 INFO  L495      AbstractCegarLoop]: Abstraction has 3458 states and 4773 transitions.
[2023-11-26 11:57:29,933 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 11:57:29,933 INFO  L276                IsEmpty]: Start isEmpty. Operand 3458 states and 4773 transitions.
[2023-11-26 11:57:29,938 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 92
[2023-11-26 11:57:29,938 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:57:29,938 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:57:29,939 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-26 11:57:29,940 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:57:29,950 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:57:29,951 INFO  L85        PathProgramCache]: Analyzing trace with hash 1417229941, now seen corresponding path program 1 times
[2023-11-26 11:57:29,951 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:57:29,951 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136236556]
[2023-11-26 11:57:29,951 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:57:29,952 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:57:29,982 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:57:30,315 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-26 11:57:30,315 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:57:30,315 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136236556]
[2023-11-26 11:57:30,316 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136236556] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:57:30,316 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:57:30,316 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-26 11:57:30,316 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323655770]
[2023-11-26 11:57:30,316 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:57:30,317 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-26 11:57:30,317 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:57:30,318 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-26 11:57:30,318 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-26 11:57:30,319 INFO  L87              Difference]: Start difference. First operand 3458 states and 4773 transitions. Second operand  has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 11:57:37,350 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:57:37,350 INFO  L93              Difference]: Finished difference Result 10869 states and 14767 transitions.
[2023-11-26 11:57:37,350 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-26 11:57:37,350 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91
[2023-11-26 11:57:37,351 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:57:37,393 INFO  L225             Difference]: With dead ends: 10869
[2023-11-26 11:57:37,393 INFO  L226             Difference]: Without dead ends: 7412
[2023-11-26 11:57:37,399 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 11:57:37,401 INFO  L413           NwaCegarLoop]: 707 mSDtfsCounter, 2581 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 4118 mSolverCounterSat, 831 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2581 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 4949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 831 IncrementalHoareTripleChecker+Valid, 4118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time
[2023-11-26 11:57:37,401 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [2581 Valid, 1001 Invalid, 4949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [831 Valid, 4118 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time]
[2023-11-26 11:57:37,413 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7412 states.
[2023-11-26 11:57:37,617 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7412 to 7411.
[2023-11-26 11:57:37,632 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7411 states, 7410 states have (on average 1.269905533063428) internal successors, (9410), 7410 states have internal predecessors, (9410), 0 states have call successors, (0), 0 states 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 11:57:37,651 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7411 states to 7411 states and 9410 transitions.
[2023-11-26 11:57:37,652 INFO  L78                 Accepts]: Start accepts. Automaton has 7411 states and 9410 transitions. Word has length 91
[2023-11-26 11:57:37,652 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:57:37,653 INFO  L495      AbstractCegarLoop]: Abstraction has 7411 states and 9410 transitions.
[2023-11-26 11:57:37,653 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 11:57:37,653 INFO  L276                IsEmpty]: Start isEmpty. Operand 7411 states and 9410 transitions.
[2023-11-26 11:57:37,657 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 173
[2023-11-26 11:57:37,657 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:57:37,658 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 11:57:37,658 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-26 11:57:37,658 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:57:37,659 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:57:37,659 INFO  L85        PathProgramCache]: Analyzing trace with hash 311801849, now seen corresponding path program 1 times
[2023-11-26 11:57:37,659 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:57:37,659 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515969735]
[2023-11-26 11:57:37,659 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:57:37,660 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:57:37,738 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:57:37,973 INFO  L134       CoverageAnalysis]: Checked inductivity of 77 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked.
[2023-11-26 11:57:37,973 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:57:37,973 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515969735]
[2023-11-26 11:57:37,974 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515969735] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:57:37,974 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:57:37,974 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-26 11:57:37,975 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654000638]
[2023-11-26 11:57:37,976 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:57:37,977 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:57:37,978 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:57:37,979 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:57:37,979 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:57:37,980 INFO  L87              Difference]: Start difference. First operand 7411 states and 9410 transitions. Second operand  has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 11:57:43,230 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:57:43,230 INFO  L93              Difference]: Finished difference Result 20356 states and 26251 transitions.
[2023-11-26 11:57:43,231 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 11:57:43,232 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 0 states have call successors, (0), 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 172
[2023-11-26 11:57:43,233 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:57:43,298 INFO  L225             Difference]: With dead ends: 20356
[2023-11-26 11:57:43,299 INFO  L226             Difference]: Without dead ends: 13733
[2023-11-26 11:57:43,309 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 11:57:43,310 INFO  L413           NwaCegarLoop]: 849 mSDtfsCounter, 889 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2577 mSolverCounterSat, 747 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 3324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 747 IncrementalHoareTripleChecker+Valid, 2577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time
[2023-11-26 11:57:43,311 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [889 Valid, 978 Invalid, 3324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [747 Valid, 2577 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time]
[2023-11-26 11:57:43,332 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13733 states.
[2023-11-26 11:57:43,587 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13733 to 12936.
[2023-11-26 11:57:43,629 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12936 states, 12935 states have (on average 1.2152299961345188) internal successors, (15719), 12935 states have internal predecessors, (15719), 0 states have call successors, (0), 0 states 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 11:57:43,668 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12936 states to 12936 states and 15719 transitions.
[2023-11-26 11:57:43,668 INFO  L78                 Accepts]: Start accepts. Automaton has 12936 states and 15719 transitions. Word has length 172
[2023-11-26 11:57:43,669 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:57:43,670 INFO  L495      AbstractCegarLoop]: Abstraction has 12936 states and 15719 transitions.
[2023-11-26 11:57:43,671 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 11:57:43,671 INFO  L276                IsEmpty]: Start isEmpty. Operand 12936 states and 15719 transitions.
[2023-11-26 11:57:43,679 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 205
[2023-11-26 11:57:43,679 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:57:43,679 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:57:43,680 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-11-26 11:57:43,680 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:57:43,680 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:57:43,681 INFO  L85        PathProgramCache]: Analyzing trace with hash 1297162409, now seen corresponding path program 1 times
[2023-11-26 11:57:43,681 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:57:43,681 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490379145]
[2023-11-26 11:57:43,681 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:57:43,681 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:57:43,760 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:57:43,969 INFO  L134       CoverageAnalysis]: Checked inductivity of 102 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-26 11:57:43,969 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:57:43,970 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490379145]
[2023-11-26 11:57:43,970 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490379145] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:57:43,970 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:57:43,971 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-26 11:57:43,971 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085138680]
[2023-11-26 11:57:43,971 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:57:43,972 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:57:43,972 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:57:43,973 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:57:43,973 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:57:43,974 INFO  L87              Difference]: Start difference. First operand 12936 states and 15719 transitions. Second operand  has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states 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 11:57:48,713 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:57:48,714 INFO  L93              Difference]: Finished difference Result 31391 states and 39118 transitions.
[2023-11-26 11:57:48,714 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 11:57:48,714 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 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 204
[2023-11-26 11:57:48,715 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:57:48,763 INFO  L225             Difference]: With dead ends: 31391
[2023-11-26 11:57:48,763 INFO  L226             Difference]: Without dead ends: 19243
[2023-11-26 11:57:48,778 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:57:48,779 INFO  L413           NwaCegarLoop]: 807 mSDtfsCounter, 857 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2382 mSolverCounterSat, 914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 3296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 914 IncrementalHoareTripleChecker+Valid, 2382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time
[2023-11-26 11:57:48,779 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [857 Valid, 924 Invalid, 3296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [914 Valid, 2382 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time]
[2023-11-26 11:57:48,807 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19243 states.
[2023-11-26 11:57:49,047 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19243 to 18446.
[2023-11-26 11:57:49,074 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 18446 states, 18445 states have (on average 1.20243968555164) internal successors, (22179), 18445 states have internal predecessors, (22179), 0 states have call successors, (0), 0 states 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 11:57:49,108 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18446 states to 18446 states and 22179 transitions.
[2023-11-26 11:57:49,109 INFO  L78                 Accepts]: Start accepts. Automaton has 18446 states and 22179 transitions. Word has length 204
[2023-11-26 11:57:49,109 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:57:49,109 INFO  L495      AbstractCegarLoop]: Abstraction has 18446 states and 22179 transitions.
[2023-11-26 11:57:49,110 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states 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 11:57:49,110 INFO  L276                IsEmpty]: Start isEmpty. Operand 18446 states and 22179 transitions.
[2023-11-26 11:57:49,117 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 294
[2023-11-26 11:57:49,117 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:57:49,118 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:57:49,118 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2023-11-26 11:57:49,118 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:57:49,119 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:57:49,119 INFO  L85        PathProgramCache]: Analyzing trace with hash 1419422385, now seen corresponding path program 1 times
[2023-11-26 11:57:49,119 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:57:49,119 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779405997]
[2023-11-26 11:57:49,119 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:57:49,120 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:57:49,200 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:57:49,491 INFO  L134       CoverageAnalysis]: Checked inductivity of 283 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked.
[2023-11-26 11:57:49,491 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:57:49,492 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779405997]
[2023-11-26 11:57:49,492 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779405997] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:57:49,492 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:57:49,492 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-26 11:57:49,492 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341590694]
[2023-11-26 11:57:49,493 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:57:49,493 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:57:49,493 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:57:49,494 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:57:49,494 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:57:49,494 INFO  L87              Difference]: Start difference. First operand 18446 states and 22179 transitions. Second operand  has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)