./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem15_label54.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 527bcce2
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_ec08859d-b17a-4386-8c78-8456ba3bbff3/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec08859d-b17a-4386-8c78-8456ba3bbff3/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec08859d-b17a-4386-8c78-8456ba3bbff3/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec08859d-b17a-4386-8c78-8456ba3bbff3/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem15_label54.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec08859d-b17a-4386-8c78-8456ba3bbff3/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec08859d-b17a-4386-8c78-8456ba3bbff3/bin/uautomizer-verify-bycVGegfSx --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 4c52ec07a463523a7400028d070720f187a378d4cbca4c6c694254a0e1ef7e72
--- Real Ultimate output ---
This is Ultimate 0.2.3-dev-527bcce
[2023-11-21 22:15:39,275 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-21 22:15:39,358 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec08859d-b17a-4386-8c78-8456ba3bbff3/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf
[2023-11-21 22:15:39,363 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-21 22:15:39,364 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-21 22:15:39,393 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-21 22:15:39,393 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-21 22:15:39,394 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-21 22:15:39,395 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-21 22:15:39,395 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-21 22:15:39,396 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-21 22:15:39,397 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-21 22:15:39,397 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-21 22:15:39,400 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-21 22:15:39,401 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-21 22:15:39,402 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-21 22:15:39,404 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-21 22:15:39,407 INFO  L153        SettingsManager]:  * sizeof long=4
[2023-11-21 22:15:39,408 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-21 22:15:39,409 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2023-11-21 22:15:39,411 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-21 22:15:39,412 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-21 22:15:39,412 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-21 22:15:39,413 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-21 22:15:39,413 INFO  L153        SettingsManager]:  * sizeof long double=12
[2023-11-21 22:15:39,414 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-21 22:15:39,414 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-21 22:15:39,415 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-21 22:15:39,415 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-21 22:15:39,416 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-21 22:15:39,417 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-21 22:15:39,417 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-21 22:15:39,418 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-21 22:15:39,418 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-21 22:15:39,418 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-21 22:15:39,419 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-21 22:15:39,419 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-21 22:15:39,419 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-21 22:15:39,419 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-21 22:15:39,420 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-21 22:15:39,420 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-21 22:15:39,420 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-21 22:15:39,421 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_ec08859d-b17a-4386-8c78-8456ba3bbff3/bin/uautomizer-verify-bycVGegfSx/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_ec08859d-b17a-4386-8c78-8456ba3bbff3/bin/uautomizer-verify-bycVGegfSx
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 -> 4c52ec07a463523a7400028d070720f187a378d4cbca4c6c694254a0e1ef7e72
[2023-11-21 22:15:39,747 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-21 22:15:39,772 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-21 22:15:39,777 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-21 22:15:39,778 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-21 22:15:39,779 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-21 22:15:39,780 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec08859d-b17a-4386-8c78-8456ba3bbff3/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/eca-rers2012/Problem15_label54.c
[2023-11-21 22:15:42,893 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-21 22:15:43,357 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-21 22:15:43,359 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec08859d-b17a-4386-8c78-8456ba3bbff3/sv-benchmarks/c/eca-rers2012/Problem15_label54.c
[2023-11-21 22:15:43,384 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec08859d-b17a-4386-8c78-8456ba3bbff3/bin/uautomizer-verify-bycVGegfSx/data/2392b5d17/b85ef33f27af48b789ecb683b66308a4/FLAG772f6855b
[2023-11-21 22:15:43,470 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec08859d-b17a-4386-8c78-8456ba3bbff3/bin/uautomizer-verify-bycVGegfSx/data/2392b5d17/b85ef33f27af48b789ecb683b66308a4
[2023-11-21 22:15:43,472 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-21 22:15:43,474 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-21 22:15:43,478 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-21 22:15:43,478 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-21 22:15:43,483 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-21 22:15:43,484 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:15:43" (1/1) ...
[2023-11-21 22:15:43,485 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d6e3a3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:43, skipping insertion in model container
[2023-11-21 22:15:43,485 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:15:43" (1/1) ...
[2023-11-21 22:15:43,574 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-21 22:15:43,878 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_ec08859d-b17a-4386-8c78-8456ba3bbff3/sv-benchmarks/c/eca-rers2012/Problem15_label54.c[4982,4995]
[2023-11-21 22:15:44,581 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-21 22:15:44,595 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-21 22:15:44,634 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_ec08859d-b17a-4386-8c78-8456ba3bbff3/sv-benchmarks/c/eca-rers2012/Problem15_label54.c[4982,4995]
[2023-11-21 22:15:44,872 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-21 22:15:44,893 INFO  L206         MainTranslator]: Completed translation
[2023-11-21 22:15:44,893 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:44 WrapperNode
[2023-11-21 22:15:44,894 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-21 22:15:44,895 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-21 22:15:44,895 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-21 22:15:44,895 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-21 22:15:44,903 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:44" (1/1) ...
[2023-11-21 22:15:44,953 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:44" (1/1) ...
[2023-11-21 22:15:45,159 INFO  L138                Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1759
[2023-11-21 22:15:45,159 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-21 22:15:45,160 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-21 22:15:45,160 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-21 22:15:45,161 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-21 22:15:45,173 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:44" (1/1) ...
[2023-11-21 22:15:45,173 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:44" (1/1) ...
[2023-11-21 22:15:45,193 INFO  L184        PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:44" (1/1) ...
[2023-11-21 22:15:45,354 INFO  L187           HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2]
[2023-11-21 22:15:45,355 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:44" (1/1) ...
[2023-11-21 22:15:45,355 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:44" (1/1) ...
[2023-11-21 22:15:45,441 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:44" (1/1) ...
[2023-11-21 22:15:45,475 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:44" (1/1) ...
[2023-11-21 22:15:45,501 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:44" (1/1) ...
[2023-11-21 22:15:45,518 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:44" (1/1) ...
[2023-11-21 22:15:45,546 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-21 22:15:45,549 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-21 22:15:45,549 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-21 22:15:45,550 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-21 22:15:45,551 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:44" (1/1) ...
[2023-11-21 22:15:45,557 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-21 22:15:45,570 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec08859d-b17a-4386-8c78-8456ba3bbff3/bin/uautomizer-verify-bycVGegfSx/z3
[2023-11-21 22:15:45,588 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec08859d-b17a-4386-8c78-8456ba3bbff3/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-11-21 22:15:45,608 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec08859d-b17a-4386-8c78-8456ba3bbff3/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-11-21 22:15:45,641 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-21 22:15:45,641 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-11-21 22:15:45,641 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-21 22:15:45,642 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-21 22:15:45,727 INFO  L240             CfgBuilder]: Building ICFG
[2023-11-21 22:15:45,729 INFO  L266             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-21 22:15:48,587 INFO  L281             CfgBuilder]: Performing block encoding
[2023-11-21 22:16:22,282 INFO  L303             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-21 22:16:22,282 INFO  L308             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-21 22:16:22,284 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:16:22 BoogieIcfgContainer
[2023-11-21 22:16:22,284 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-21 22:16:22,287 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-21 22:16:22,287 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-21 22:16:22,290 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-21 22:16:22,291 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:15:43" (1/3) ...
[2023-11-21 22:16:22,291 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41226608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:16:22, skipping insertion in model container
[2023-11-21 22:16:22,292 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:44" (2/3) ...
[2023-11-21 22:16:22,292 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41226608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:16:22, skipping insertion in model container
[2023-11-21 22:16:22,292 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:16:22" (3/3) ...
[2023-11-21 22:16:22,296 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem15_label54.c
[2023-11-21 22:16:22,317 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-21 22:16:22,318 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-21 22:16:22,365 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-21 22:16:22,372 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;@586b6f7c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-21 22:16:22,372 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-21 22:16:22,377 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:16:22,385 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6
[2023-11-21 22:16:22,385 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-21 22:16:22,387 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1]
[2023-11-21 22:16:22,388 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-21 22:16:22,395 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 22:16:22,395 INFO  L85        PathProgramCache]: Analyzing trace with hash 1783983767, now seen corresponding path program 1 times
[2023-11-21 22:16:22,405 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 22:16:22,406 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145913407]
[2023-11-21 22:16:22,407 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:16:22,407 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 22:16:22,542 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:16:22,643 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-21 22:16:22,644 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 22:16:22,644 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145913407]
[2023-11-21 22:16:22,645 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145913407] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-21 22:16:22,645 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-21 22:16:22,645 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-21 22:16:22,647 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771802262]
[2023-11-21 22:16:22,648 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-21 22:16:22,652 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-21 22:16:22,652 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 22:16:22,681 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-21 22:16:22,681 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-21 22:16:22,684 INFO  L87              Difference]: Start difference. First operand  has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 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)
[2023-11-21 22:16:23,059 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 22:16:23,059 INFO  L93              Difference]: Finished difference Result 23 states and 29 transitions.
[2023-11-21 22:16:23,060 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-21 22:16:23,062 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
[2023-11-21 22:16:23,062 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 22:16:23,069 INFO  L225             Difference]: With dead ends: 23
[2023-11-21 22:16:23,070 INFO  L226             Difference]: Without dead ends: 11
[2023-11-21 22:16:23,072 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
[2023-11-21 22:16:23,076 INFO  L413           NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2023-11-21 22:16:23,077 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2023-11-21 22:16:23,095 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11 states.
[2023-11-21 22:16:23,106 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10.
[2023-11-21 22:16:23,107 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:16:23,108 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions.
[2023-11-21 22:16:23,110 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 5
[2023-11-21 22:16:23,110 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-21 22:16:23,110 INFO  L495      AbstractCegarLoop]: Abstraction has 10 states and 10 transitions.
[2023-11-21 22:16:23,111 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)
[2023-11-21 22:16:23,111 INFO  L276                IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions.
[2023-11-21 22:16:23,111 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10
[2023-11-21 22:16:23,112 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-21 22:16:23,112 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1]
[2023-11-21 22:16:23,112 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-21 22:16:23,112 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-21 22:16:23,113 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 22:16:23,114 INFO  L85        PathProgramCache]: Analyzing trace with hash -682029987, now seen corresponding path program 1 times
[2023-11-21 22:16:23,114 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 22:16:23,114 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744521060]
[2023-11-21 22:16:23,114 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:16:23,115 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 22:16:24,893 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat