./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem15_label35.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 0e0057cc
Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a4919-ee3c-4133-bf4c-fb714d71f318/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a4919-ee3c-4133-bf4c-fb714d71f318/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_449a4919-ee3c-4133-bf4c-fb714d71f318/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a4919-ee3c-4133-bf4c-fb714d71f318/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem15_label35.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a4919-ee3c-4133-bf4c-fb714d71f318/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_449a4919-ee3c-4133-bf4c-fb714d71f318/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 954f50d37143b139a2ebc4626a6099455decd471f8c1055eb5e8a313dea8492b
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-11-26 11:45:05,042 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-26 11:45:05,168 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a4919-ee3c-4133-bf4c-fb714d71f318/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf
[2023-11-26 11:45:05,176 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-26 11:45:05,177 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-26 11:45:05,223 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-26 11:45:05,224 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-26 11:45:05,225 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-26 11:45:05,226 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-26 11:45:05,232 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-26 11:45:05,233 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-26 11:45:05,234 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-26 11:45:05,235 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-26 11:45:05,237 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-26 11:45:05,237 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-26 11:45:05,238 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-26 11:45:05,238 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-26 11:45:05,239 INFO  L153        SettingsManager]:  * sizeof long=4
[2023-11-26 11:45:05,239 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-26 11:45:05,240 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2023-11-26 11:45:05,240 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-26 11:45:05,241 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-26 11:45:05,242 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-26 11:45:05,242 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-26 11:45:05,243 INFO  L153        SettingsManager]:  * sizeof long double=12
[2023-11-26 11:45:05,243 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-26 11:45:05,244 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-26 11:45:05,245 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-26 11:45:05,245 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-26 11:45:05,246 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-26 11:45:05,248 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-26 11:45:05,248 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-26 11:45:05,248 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-26 11:45:05,249 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-26 11:45:05,249 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-26 11:45:05,249 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-26 11:45:05,249 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-26 11:45:05,250 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-26 11:45:05,250 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-26 11:45:05,250 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-26 11:45:05,251 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-26 11:45:05,251 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-26 11:45:05,251 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_449a4919-ee3c-4133-bf4c-fb714d71f318/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_449a4919-ee3c-4133-bf4c-fb714d71f318/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 -> 954f50d37143b139a2ebc4626a6099455decd471f8c1055eb5e8a313dea8492b
[2023-11-26 11:45:05,645 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-26 11:45:05,682 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-26 11:45:05,685 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-26 11:45:05,686 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-26 11:45:05,687 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-26 11:45:05,689 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a4919-ee3c-4133-bf4c-fb714d71f318/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/eca-rers2012/Problem15_label35.c
[2023-11-26 11:45:08,834 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-26 11:45:09,368 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-26 11:45:09,370 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a4919-ee3c-4133-bf4c-fb714d71f318/sv-benchmarks/c/eca-rers2012/Problem15_label35.c
[2023-11-26 11:45:09,401 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a4919-ee3c-4133-bf4c-fb714d71f318/bin/uautomizer-verify-VRDe98Ueme/data/f9bab3158/fb1fcb1807a440afba6af85fab4f7722/FLAG5a401f389
[2023-11-26 11:45:09,421 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a4919-ee3c-4133-bf4c-fb714d71f318/bin/uautomizer-verify-VRDe98Ueme/data/f9bab3158/fb1fcb1807a440afba6af85fab4f7722
[2023-11-26 11:45:09,428 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-26 11:45:09,432 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-26 11:45:09,437 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-26 11:45:09,437 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-26 11:45:09,444 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-26 11:45:09,445 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:45:09" (1/1) ...
[2023-11-26 11:45:09,446 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7344d523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:09, skipping insertion in model container
[2023-11-26 11:45:09,446 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:45:09" (1/1) ...
[2023-11-26 11:45:09,543 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-26 11:45:09,840 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_449a4919-ee3c-4133-bf4c-fb714d71f318/sv-benchmarks/c/eca-rers2012/Problem15_label35.c[4490,4503]
[2023-11-26 11:45:10,470 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-26 11:45:10,485 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-26 11:45:10,531 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_449a4919-ee3c-4133-bf4c-fb714d71f318/sv-benchmarks/c/eca-rers2012/Problem15_label35.c[4490,4503]
[2023-11-26 11:45:10,869 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-26 11:45:10,891 INFO  L206         MainTranslator]: Completed translation
[2023-11-26 11:45:10,892 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:10 WrapperNode
[2023-11-26 11:45:10,892 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-26 11:45:10,894 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-26 11:45:10,894 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-26 11:45:10,894 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-26 11:45:10,903 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:10" (1/1) ...
[2023-11-26 11:45:10,962 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:10" (1/1) ...
[2023-11-26 11:45:11,221 INFO  L138                Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1759
[2023-11-26 11:45:11,223 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-26 11:45:11,223 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-26 11:45:11,223 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-26 11:45:11,224 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-26 11:45:11,236 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:10" (1/1) ...
[2023-11-26 11:45:11,236 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:10" (1/1) ...
[2023-11-26 11:45:11,347 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:10" (1/1) ...
[2023-11-26 11:45:11,480 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 11:45:11,480 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:10" (1/1) ...
[2023-11-26 11:45:11,480 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:10" (1/1) ...
[2023-11-26 11:45:11,570 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:10" (1/1) ...
[2023-11-26 11:45:11,587 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:10" (1/1) ...
[2023-11-26 11:45:11,605 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:10" (1/1) ...
[2023-11-26 11:45:11,616 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:10" (1/1) ...
[2023-11-26 11:45:11,648 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-26 11:45:11,650 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-26 11:45:11,650 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-26 11:45:11,651 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-26 11:45:11,652 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:10" (1/1) ...
[2023-11-26 11:45:11,659 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-26 11:45:11,673 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a4919-ee3c-4133-bf4c-fb714d71f318/bin/uautomizer-verify-VRDe98Ueme/z3
[2023-11-26 11:45:11,693 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a4919-ee3c-4133-bf4c-fb714d71f318/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2023-11-26 11:45:11,728 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a4919-ee3c-4133-bf4c-fb714d71f318/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2023-11-26 11:45:11,746 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-26 11:45:11,747 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-11-26 11:45:11,747 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-26 11:45:11,747 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-26 11:45:11,821 INFO  L241             CfgBuilder]: Building ICFG
[2023-11-26 11:45:11,823 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-26 11:45:15,450 INFO  L282             CfgBuilder]: Performing block encoding
[2023-11-26 11:45:15,534 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-26 11:45:15,536 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-26 11:45:15,537 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:45:15 BoogieIcfgContainer
[2023-11-26 11:45:15,537 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-26 11:45:15,543 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-26 11:45:15,543 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-26 11:45:15,547 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-26 11:45:15,547 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:45:09" (1/3) ...
[2023-11-26 11:45:15,548 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17ba0c2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:45:15, skipping insertion in model container
[2023-11-26 11:45:15,548 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:10" (2/3) ...
[2023-11-26 11:45:15,550 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17ba0c2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:45:15, skipping insertion in model container
[2023-11-26 11:45:15,550 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:45:15" (3/3) ...
[2023-11-26 11:45:15,553 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem15_label35.c
[2023-11-26 11:45:15,575 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-26 11:45:15,576 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-26 11:45:15,647 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-26 11:45:15,656 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;@583a6118, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-26 11:45:15,656 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-26 11:45:15,666 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 362 states, 360 states have (on average 1.9111111111111112) internal successors, (688), 361 states have internal predecessors, (688), 0 states have call successors, (0), 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 11:45:15,675 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 36
[2023-11-26 11:45:15,676 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:45:15,677 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:45:15,679 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:45:15,687 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:45:15,687 INFO  L85        PathProgramCache]: Analyzing trace with hash -1299030564, now seen corresponding path program 1 times
[2023-11-26 11:45:15,697 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:45:15,697 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903585410]
[2023-11-26 11:45:15,698 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:45:15,698 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:45:15,827 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:45:15,944 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 11:45:15,945 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:45:15,945 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903585410]
[2023-11-26 11:45:15,946 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903585410] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:45:15,947 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:45:15,947 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-26 11:45:15,949 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082067649]
[2023-11-26 11:45:15,952 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:45:15,957 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2023-11-26 11:45:15,959 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:45:16,001 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2023-11-26 11:45:16,002 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2023-11-26 11:45:16,006 INFO  L87              Difference]: Start difference. First operand  has 362 states, 360 states have (on average 1.9111111111111112) internal successors, (688), 361 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 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 11:45:16,118 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:45:16,118 INFO  L93              Difference]: Finished difference Result 723 states and 1375 transitions.
[2023-11-26 11:45:16,120 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2023-11-26 11:45:16,121 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 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 35
[2023-11-26 11:45:16,122 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:45:16,147 INFO  L225             Difference]: With dead ends: 723
[2023-11-26 11:45:16,148 INFO  L226             Difference]: Without dead ends: 360
[2023-11-26 11:45:16,157 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2023-11-26 11:45:16,162 INFO  L413           NwaCegarLoop]: 623 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-26 11:45:16,164 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 623 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-26 11:45:16,186 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 360 states.
[2023-11-26 11:45:16,251 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360.
[2023-11-26 11:45:16,255 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 360 states, 359 states have (on average 1.7353760445682451) internal successors, (623), 359 states have internal predecessors, (623), 0 states have call successors, (0), 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 11:45:16,262 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 623 transitions.
[2023-11-26 11:45:16,264 INFO  L78                 Accepts]: Start accepts. Automaton has 360 states and 623 transitions. Word has length 35
[2023-11-26 11:45:16,264 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:45:16,264 INFO  L495      AbstractCegarLoop]: Abstraction has 360 states and 623 transitions.
[2023-11-26 11:45:16,265 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 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 11:45:16,265 INFO  L276                IsEmpty]: Start isEmpty. Operand 360 states and 623 transitions.
[2023-11-26 11:45:16,266 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 36
[2023-11-26 11:45:16,267 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:45:16,267 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:45:16,267 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-26 11:45:16,268 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:45:16,269 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:45:16,269 INFO  L85        PathProgramCache]: Analyzing trace with hash 1618624743, now seen corresponding path program 1 times
[2023-11-26 11:45:16,269 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:45:16,270 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071132333]
[2023-11-26 11:45:16,270 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:45:16,270 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:45:16,308 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:45:16,533 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 11:45:16,534 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:45:16,534 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071132333]
[2023-11-26 11:45:16,535 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071132333] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:45:16,535 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:45:16,535 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-26 11:45:16,536 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992741047]
[2023-11-26 11:45:16,536 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:45:16,538 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:45:16,543 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:45:16,544 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:45:16,544 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:45:16,545 INFO  L87              Difference]: Start difference. First operand 360 states and 623 transitions. Second operand  has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 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 11:45:19,146 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:45:19,146 INFO  L93              Difference]: Finished difference Result 1025 states and 1788 transitions.
[2023-11-26 11:45:19,147 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 11:45:19,147 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 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 35
[2023-11-26 11:45:19,148 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:45:19,152 INFO  L225             Difference]: With dead ends: 1025
[2023-11-26 11:45:19,152 INFO  L226             Difference]: Without dead ends: 666
[2023-11-26 11:45:19,153 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 11:45:19,155 INFO  L413           NwaCegarLoop]: 277 mSDtfsCounter, 292 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time
[2023-11-26 11:45:19,155 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 316 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time]
[2023-11-26 11:45:19,158 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 666 states.
[2023-11-26 11:45:19,176 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 664.
[2023-11-26 11:45:19,178 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 664 states, 663 states have (on average 1.4796380090497738) internal successors, (981), 663 states have internal predecessors, (981), 0 states have call successors, (0), 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 11:45:19,181 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 981 transitions.
[2023-11-26 11:45:19,181 INFO  L78                 Accepts]: Start accepts. Automaton has 664 states and 981 transitions. Word has length 35
[2023-11-26 11:45:19,182 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:45:19,182 INFO  L495      AbstractCegarLoop]: Abstraction has 664 states and 981 transitions.
[2023-11-26 11:45:19,182 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 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 11:45:19,182 INFO  L276                IsEmpty]: Start isEmpty. Operand 664 states and 981 transitions.
[2023-11-26 11:45:19,187 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 111
[2023-11-26 11:45:19,187 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:45:19,187 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:45:19,188 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-26 11:45:19,188 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:45:19,188 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:45:19,189 INFO  L85        PathProgramCache]: Analyzing trace with hash 800852888, now seen corresponding path program 1 times
[2023-11-26 11:45:19,189 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:45:19,189 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579127162]
[2023-11-26 11:45:19,189 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:45:19,189 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:45:19,276 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:45:19,487 INFO  L134       CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-26 11:45:19,487 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:45:19,487 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579127162]
[2023-11-26 11:45:19,488 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579127162] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:45:19,488 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:45:19,488 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-26 11:45:19,488 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897419659]
[2023-11-26 11:45:19,489 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:45:19,489 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:45:19,489 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:45:19,490 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:45:19,491 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:45:19,491 INFO  L87              Difference]: Start difference. First operand 664 states and 981 transitions. Second operand  has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 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 11:45:22,658 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:45:22,659 INFO  L93              Difference]: Finished difference Result 1952 states and 2892 transitions.
[2023-11-26 11:45:22,659 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 11:45:22,660 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 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 110
[2023-11-26 11:45:22,660 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:45:22,668 INFO  L225             Difference]: With dead ends: 1952
[2023-11-26 11:45:22,668 INFO  L226             Difference]: Without dead ends: 1289
[2023-11-26 11:45:22,669 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 11:45:22,670 INFO  L413           NwaCegarLoop]: 286 mSDtfsCounter, 257 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time
[2023-11-26 11:45:22,671 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 323 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time]
[2023-11-26 11:45:22,674 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1289 states.
[2023-11-26 11:45:22,700 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1281.
[2023-11-26 11:45:22,703 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1281 states, 1280 states have (on average 1.39921875) internal successors, (1791), 1280 states have internal predecessors, (1791), 0 states have call successors, (0), 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 11:45:22,708 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1791 transitions.
[2023-11-26 11:45:22,709 INFO  L78                 Accepts]: Start accepts. Automaton has 1281 states and 1791 transitions. Word has length 110
[2023-11-26 11:45:22,709 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:45:22,710 INFO  L495      AbstractCegarLoop]: Abstraction has 1281 states and 1791 transitions.
[2023-11-26 11:45:22,710 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 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 11:45:22,710 INFO  L276                IsEmpty]: Start isEmpty. Operand 1281 states and 1791 transitions.
[2023-11-26 11:45:22,715 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 115
[2023-11-26 11:45:22,716 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:45:22,716 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:45:22,716 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-26 11:45:22,717 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:45:22,717 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:45:22,717 INFO  L85        PathProgramCache]: Analyzing trace with hash -296139314, now seen corresponding path program 1 times
[2023-11-26 11:45:22,717 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:45:22,718 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85667635]
[2023-11-26 11:45:22,718 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:45:22,718 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:45:22,761 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:45:22,972 INFO  L134       CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-26 11:45:22,972 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:45:22,972 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85667635]
[2023-11-26 11:45:22,972 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85667635] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:45:22,973 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:45:22,973 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-26 11:45:22,973 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939587403]
[2023-11-26 11:45:22,973 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:45:22,974 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:45:22,974 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:45:22,974 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:45:22,975 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:45:22,975 INFO  L87              Difference]: Start difference. First operand 1281 states and 1791 transitions. Second operand  has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 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 11:45:26,025 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:45:26,025 INFO  L93              Difference]: Finished difference Result 3763 states and 5262 transitions.
[2023-11-26 11:45:26,026 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 11:45:26,026 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 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 114
[2023-11-26 11:45:26,027 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:45:26,044 INFO  L225             Difference]: With dead ends: 3763
[2023-11-26 11:45:26,045 INFO  L226             Difference]: Without dead ends: 2483
[2023-11-26 11:45:26,048 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 11:45:26,049 INFO  L413           NwaCegarLoop]: 318 mSDtfsCounter, 236 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time
[2023-11-26 11:45:26,050 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 364 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time]
[2023-11-26 11:45:26,055 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2483 states.
[2023-11-26 11:45:26,118 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 2181.
[2023-11-26 11:45:26,124 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2181 states, 2180 states have (on average 1.281651376146789) internal successors, (2794), 2180 states have internal predecessors, (2794), 0 states have call successors, (0), 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 11:45:26,132 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 2794 transitions.
[2023-11-26 11:45:26,133 INFO  L78                 Accepts]: Start accepts. Automaton has 2181 states and 2794 transitions. Word has length 114
[2023-11-26 11:45:26,134 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:45:26,134 INFO  L495      AbstractCegarLoop]: Abstraction has 2181 states and 2794 transitions.
[2023-11-26 11:45:26,134 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 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 11:45:26,135 INFO  L276                IsEmpty]: Start isEmpty. Operand 2181 states and 2794 transitions.
[2023-11-26 11:45:26,143 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 206
[2023-11-26 11:45:26,144 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:45:26,144 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:45:26,145 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-11-26 11:45:26,145 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:45:26,146 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:45:26,146 INFO  L85        PathProgramCache]: Analyzing trace with hash -40763892, now seen corresponding path program 1 times
[2023-11-26 11:45:26,146 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:45:26,147 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192066715]
[2023-11-26 11:45:26,147 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:45:26,147 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:45:26,239 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:45:26,542 INFO  L134       CoverageAnalysis]: Checked inductivity of 145 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked.
[2023-11-26 11:45:26,542 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:45:26,542 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192066715]
[2023-11-26 11:45:26,544 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192066715] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:45:26,544 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:45:26,545 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-26 11:45:26,545 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105243071]
[2023-11-26 11:45:26,545 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:45:26,547 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:45:26,547 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:45:26,548 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:45:26,548 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:45:26,549 INFO  L87              Difference]: Start difference. First operand 2181 states and 2794 transitions. Second operand  has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:45:29,048 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:45:29,049 INFO  L93              Difference]: Finished difference Result 6165 states and 7960 transitions.
[2023-11-26 11:45:29,049 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 11:45:29,050 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205
[2023-11-26 11:45:29,051 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:45:29,077 INFO  L225             Difference]: With dead ends: 6165
[2023-11-26 11:45:29,077 INFO  L226             Difference]: Without dead ends: 3985
[2023-11-26 11:45:29,081 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 11:45:29,082 INFO  L413           NwaCegarLoop]: 270 mSDtfsCounter, 257 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time
[2023-11-26 11:45:29,083 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 337 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time]
[2023-11-26 11:45:29,090 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3985 states.
[2023-11-26 11:45:29,170 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3985 to 3681.
[2023-11-26 11:45:29,179 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3681 states, 3680 states have (on average 1.2201086956521738) internal successors, (4490), 3680 states have internal predecessors, (4490), 0 states have call successors, (0), 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 11:45:29,190 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3681 states to 3681 states and 4490 transitions.
[2023-11-26 11:45:29,191 INFO  L78                 Accepts]: Start accepts. Automaton has 3681 states and 4490 transitions. Word has length 205
[2023-11-26 11:45:29,193 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:45:29,193 INFO  L495      AbstractCegarLoop]: Abstraction has 3681 states and 4490 transitions.
[2023-11-26 11:45:29,193 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:45:29,195 INFO  L276                IsEmpty]: Start isEmpty. Operand 3681 states and 4490 transitions.
[2023-11-26 11:45:29,206 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 308
[2023-11-26 11:45:29,206 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:45:29,207 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:45:29,207 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2023-11-26 11:45:29,208 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:45:29,208 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:45:29,208 INFO  L85        PathProgramCache]: Analyzing trace with hash -1357926574, now seen corresponding path program 1 times
[2023-11-26 11:45:29,209 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:45:29,209 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481030086]
[2023-11-26 11:45:29,209 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:45:29,210 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:45:29,334 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:45:30,425 INFO  L134       CoverageAnalysis]: Checked inductivity of 142 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked.
[2023-11-26 11:45:30,426 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:45:30,427 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481030086]
[2023-11-26 11:45:30,427 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481030086] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:45:30,428 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:45:30,428 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-26 11:45:30,429 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390412408]
[2023-11-26 11:45:30,430 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:45:30,431 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:45:30,432 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:45:30,433 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:45:30,433 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:45:30,434 INFO  L87              Difference]: Start difference. First operand 3681 states and 4490 transitions. Second operand  has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 2 states have internal predecessors, (274), 0 states have call successors, (0), 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 11:45:33,067 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:45:33,067 INFO  L93              Difference]: Finished difference Result 7660 states and 9290 transitions.
[2023-11-26 11:45:33,068 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 11:45:33,068 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 2 states have internal predecessors, (274), 0 states have call successors, (0), 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 307
[2023-11-26 11:45:33,069 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:45:33,091 INFO  L225             Difference]: With dead ends: 7660
[2023-11-26 11:45:33,091 INFO  L226             Difference]: Without dead ends: 3980
[2023-11-26 11:45:33,095 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 11:45:33,096 INFO  L413           NwaCegarLoop]: 322 mSDtfsCounter, 105 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time
[2023-11-26 11:45:33,097 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 357 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time]
[2023-11-26 11:45:33,102 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3980 states.
[2023-11-26 11:45:33,169 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3980 to 3980.
[2023-11-26 11:45:33,177 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3980 states, 3979 states have (on average 1.2050766524252325) internal successors, (4795), 3979 states have internal predecessors, (4795), 0 states have call successors, (0), 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 11:45:33,186 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3980 states to 3980 states and 4795 transitions.
[2023-11-26 11:45:33,186 INFO  L78                 Accepts]: Start accepts. Automaton has 3980 states and 4795 transitions. Word has length 307
[2023-11-26 11:45:33,187 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:45:33,187 INFO  L495      AbstractCegarLoop]: Abstraction has 3980 states and 4795 transitions.
[2023-11-26 11:45:33,188 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 2 states have internal predecessors, (274), 0 states have call successors, (0), 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 11:45:33,188 INFO  L276                IsEmpty]: Start isEmpty. Operand 3980 states and 4795 transitions.
[2023-11-26 11:45:33,193 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 323
[2023-11-26 11:45:33,193 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:45:33,194 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:45:33,194 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2023-11-26 11:45:33,194 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:45:33,195 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:45:33,195 INFO  L85        PathProgramCache]: Analyzing trace with hash 92751737, now seen corresponding path program 1 times
[2023-11-26 11:45:33,195 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:45:33,195 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116601389]
[2023-11-26 11:45:33,196 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:45:33,196 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:45:33,294 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:45:33,636 INFO  L134       CoverageAnalysis]: Checked inductivity of 157 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked.
[2023-11-26 11:45:33,636 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:45:33,637 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116601389]
[2023-11-26 11:45:33,637 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116601389] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:45:33,637 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:45:33,637 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-26 11:45:33,637 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077361790]
[2023-11-26 11:45:33,638 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:45:33,638 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:45:33,638 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:45:33,639 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:45:33,639 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:45:33,640 INFO  L87              Difference]: Start difference. First operand 3980 states and 4795 transitions. Second operand  has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 11:45:36,684 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:45:36,684 INFO  L93              Difference]: Finished difference Result 9464 states and 11673 transitions.
[2023-11-26 11:45:36,685 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 11:45:36,686 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 322
[2023-11-26 11:45:36,687 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:45:36,722 INFO  L225             Difference]: With dead ends: 9464
[2023-11-26 11:45:36,722 INFO  L226             Difference]: Without dead ends: 5784
[2023-11-26 11:45:36,728 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 11:45:36,729 INFO  L413           NwaCegarLoop]: 630 mSDtfsCounter, 280 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time
[2023-11-26 11:45:36,730 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 668 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time]
[2023-11-26 11:45:36,740 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5784 states.
[2023-11-26 11:45:36,856 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5784 to 5782.
[2023-11-26 11:45:36,869 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5782 states, 5781 states have (on average 1.167618059159315) internal successors, (6750), 5781 states have internal predecessors, (6750), 0 states have call successors, (0), 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 11:45:36,884 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5782 states to 5782 states and 6750 transitions.
[2023-11-26 11:45:36,884 INFO  L78                 Accepts]: Start accepts. Automaton has 5782 states and 6750 transitions. Word has length 322
[2023-11-26 11:45:36,885 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:45:36,885 INFO  L495      AbstractCegarLoop]: Abstraction has 5782 states and 6750 transitions.
[2023-11-26 11:45:36,886 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 11:45:36,886 INFO  L276                IsEmpty]: Start isEmpty. Operand 5782 states and 6750 transitions.
[2023-11-26 11:45:36,894 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 382
[2023-11-26 11:45:36,894 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:45:36,895 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:45:36,895 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2023-11-26 11:45:36,895 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:45:36,896 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:45:36,896 INFO  L85        PathProgramCache]: Analyzing trace with hash 1272626532, now seen corresponding path program 1 times
[2023-11-26 11:45:36,897 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:45:36,897 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415495783]
[2023-11-26 11:45:36,897 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:45:36,897 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:45:37,044 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:45:37,561 INFO  L134       CoverageAnalysis]: Checked inductivity of 142 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked.
[2023-11-26 11:45:37,562 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:45:37,562 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415495783]
[2023-11-26 11:45:37,562 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415495783] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:45:37,563 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:45:37,563 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-26 11:45:37,564 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584674938]
[2023-11-26 11:45:37,564 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:45:37,565 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:45:37,566 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:45:37,567 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:45:37,567 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:45:37,567 INFO  L87              Difference]: Start difference. First operand 5782 states and 6750 transitions. Second operand  has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 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 11:45:40,397 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:45:40,398 INFO  L93              Difference]: Finished difference Result 13363 states and 15909 transitions.
[2023-11-26 11:45:40,399 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 11:45:40,400 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 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 381
[2023-11-26 11:45:40,401 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:45:40,444 INFO  L225             Difference]: With dead ends: 13363
[2023-11-26 11:45:40,445 INFO  L226             Difference]: Without dead ends: 7881
[2023-11-26 11:45:40,453 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 11:45:40,455 INFO  L413           NwaCegarLoop]: 596 mSDtfsCounter, 291 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time
[2023-11-26 11:45:40,455 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 632 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time]
[2023-11-26 11:45:40,468 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7881 states.
[2023-11-26 11:45:40,626 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7881 to 7283.
[2023-11-26 11:45:40,643 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7283 states, 7282 states have (on average 1.148722878330129) internal successors, (8365), 7282 states have internal predecessors, (8365), 0 states have call successors, (0), 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 11:45:40,657 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7283 states to 7283 states and 8365 transitions.
[2023-11-26 11:45:40,658 INFO  L78                 Accepts]: Start accepts. Automaton has 7283 states and 8365 transitions. Word has length 381
[2023-11-26 11:45:40,659 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:45:40,659 INFO  L495      AbstractCegarLoop]: Abstraction has 7283 states and 8365 transitions.
[2023-11-26 11:45:40,659 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 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 11:45:40,660 INFO  L276                IsEmpty]: Start isEmpty. Operand 7283 states and 8365 transitions.
[2023-11-26 11:45:40,669 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 397
[2023-11-26 11:45:40,670 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:45:40,672 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:45:40,672 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2023-11-26 11:45:40,672 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:45:40,673 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:45:40,673 INFO  L85        PathProgramCache]: Analyzing trace with hash 2126128651, now seen corresponding path program 1 times
[2023-11-26 11:45:40,673 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:45:40,674 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028039317]
[2023-11-26 11:45:40,674 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:45:40,674 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:45:40,854 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:45:41,275 INFO  L134       CoverageAnalysis]: Checked inductivity of 157 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked.
[2023-11-26 11:45:41,275 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:45:41,276 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028039317]
[2023-11-26 11:45:41,276 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028039317] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:45:41,276 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:45:41,276 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-26 11:45:41,277 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773297404]
[2023-11-26 11:45:41,277 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:45:41,278 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:45:41,279 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:45:41,280 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:45:41,280 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:45:41,281 INFO  L87              Difference]: Start difference. First operand 7283 states and 8365 transitions. Second operand  has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 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 11:45:44,230 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:45:44,231 INFO  L93              Difference]: Finished difference Result 16068 states and 18813 transitions.
[2023-11-26 11:45:44,237 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 11:45:44,238 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 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 396
[2023-11-26 11:45:44,239 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:45:44,281 INFO  L225             Difference]: With dead ends: 16068
[2023-11-26 11:45:44,281 INFO  L226             Difference]: Without dead ends: 9085
[2023-11-26 11:45:44,291 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 11:45:44,292 INFO  L413           NwaCegarLoop]: 583 mSDtfsCounter, 293 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time
[2023-11-26 11:45:44,292 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 620 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time]
[2023-11-26 11:45:44,306 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9085 states.
[2023-11-26 11:45:44,459 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9085 to 8480.
[2023-11-26 11:45:44,478 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 8480 states, 8479 states have (on average 1.1379879702795141) internal successors, (9649), 8479 states have internal predecessors, (9649), 0 states have call successors, (0), 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 11:45:44,495 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8480 states to 8480 states and 9649 transitions.
[2023-11-26 11:45:44,496 INFO  L78                 Accepts]: Start accepts. Automaton has 8480 states and 9649 transitions. Word has length 396
[2023-11-26 11:45:44,497 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:45:44,497 INFO  L495      AbstractCegarLoop]: Abstraction has 8480 states and 9649 transitions.
[2023-11-26 11:45:44,498 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 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 11:45:44,498 INFO  L276                IsEmpty]: Start isEmpty. Operand 8480 states and 9649 transitions.
[2023-11-26 11:45:44,512 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 487
[2023-11-26 11:45:44,512 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:45:44,513 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:45:44,513 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8
[2023-11-26 11:45:44,513 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:45:44,520 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:45:44,520 INFO  L85        PathProgramCache]: Analyzing trace with hash 699725088, now seen corresponding path program 1 times
[2023-11-26 11:45:44,520 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:45:44,521 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686180247]
[2023-11-26 11:45:44,521 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:45:44,521 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:45:44,689 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:45:45,187 INFO  L134       CoverageAnalysis]: Checked inductivity of 445 backedges. 321 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked.
[2023-11-26 11:45:45,188 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:45:45,188 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686180247]
[2023-11-26 11:45:45,188 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686180247] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:45:45,188 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:45:45,189 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-26 11:45:45,189 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978015565]
[2023-11-26 11:45:45,189 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:45:45,191 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:45:45,191 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:45:45,192 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:45:45,192 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:45:45,208 INFO  L87              Difference]: Start difference. First operand 8480 states and 9649 transitions. Second operand  has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 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 11:45:48,190 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:45:48,190 INFO  L93              Difference]: Finished difference Result 19650 states and 22542 transitions.
[2023-11-26 11:45:48,192 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 11:45:48,193 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 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 486
[2023-11-26 11:45:48,195 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:45:48,221 INFO  L225             Difference]: With dead ends: 19650
[2023-11-26 11:45:48,222 INFO  L226             Difference]: Without dead ends: 11470
[2023-11-26 11:45:48,233 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 11:45:48,234 INFO  L413           NwaCegarLoop]: 271 mSDtfsCounter, 147 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time
[2023-11-26 11:45:48,235 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 313 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time]
[2023-11-26 11:45:48,253 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11470 states.
[2023-11-26 11:45:48,391 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11470 to 7577.
[2023-11-26 11:45:48,403 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7577 states, 7576 states have (on average 1.1486272439281944) internal successors, (8702), 7576 states have internal predecessors, (8702), 0 states have call successors, (0), 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 11:45:48,418 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7577 states to 7577 states and 8702 transitions.
[2023-11-26 11:45:48,418 INFO  L78                 Accepts]: Start accepts. Automaton has 7577 states and 8702 transitions. Word has length 486
[2023-11-26 11:45:48,419 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:45:48,420 INFO  L495      AbstractCegarLoop]: Abstraction has 7577 states and 8702 transitions.
[2023-11-26 11:45:48,420 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 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 11:45:48,420 INFO  L276                IsEmpty]: Start isEmpty. Operand 7577 states and 8702 transitions.
[2023-11-26 11:45:48,438 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 520
[2023-11-26 11:45:48,439 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:45:48,439 INFO  L195           NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:45:48,440 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9
[2023-11-26 11:45:48,440 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:45:48,441 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:45:48,441 INFO  L85        PathProgramCache]: Analyzing trace with hash -2045678992, now seen corresponding path program 1 times
[2023-11-26 11:45:48,441 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:45:48,442 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388486112]
[2023-11-26 11:45:48,442 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:45:48,442 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:45:48,610 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:45:49,624 INFO  L134       CoverageAnalysis]: Checked inductivity of 659 backedges. 477 proven. 39 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked.
[2023-11-26 11:45:49,625 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:45:49,625 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388486112]
[2023-11-26 11:45:49,625 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388486112] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-26 11:45:49,625 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092775318]
[2023-11-26 11:45:49,626 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:45:49,626 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-26 11:45:49,626 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a4919-ee3c-4133-bf4c-fb714d71f318/bin/uautomizer-verify-VRDe98Ueme/z3
[2023-11-26 11:45:49,636 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a4919-ee3c-4133-bf4c-fb714d71f318/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-26 11:45:49,645 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a4919-ee3c-4133-bf4c-fb714d71f318/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-26 11:45:49,988 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:45:49,993 INFO  L262         TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 2 conjunts are in the unsatisfiable core
[2023-11-26 11:45:50,028 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-26 11:45:50,199 INFO  L134       CoverageAnalysis]: Checked inductivity of 659 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked.
[2023-11-26 11:45:50,199 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-26 11:45:50,200 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092775318] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:45:50,200 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-26 11:45:50,200 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6
[2023-11-26 11:45:50,201 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342788454]
[2023-11-26 11:45:50,201 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:45:50,202 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:45:50,202 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:45:50,203 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:45:50,204 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2023-11-26 11:45:50,204 INFO  L87              Difference]: Start difference. First operand 7577 states and 8702 transitions. Second operand  has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)