./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem16_label37.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_804bddf9-7d32-4eb9-ba08-22bf69436af1/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804bddf9-7d32-4eb9-ba08-22bf69436af1/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_804bddf9-7d32-4eb9-ba08-22bf69436af1/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804bddf9-7d32-4eb9-ba08-22bf69436af1/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem16_label37.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804bddf9-7d32-4eb9-ba08-22bf69436af1/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_804bddf9-7d32-4eb9-ba08-22bf69436af1/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 0c9b36c4432c83400aecd1170e3c902f5356c89b28a319ce0e390f2a9fbc6f35
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-11-26 12:05:11,531 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-26 12:05:11,602 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804bddf9-7d32-4eb9-ba08-22bf69436af1/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf
[2023-11-26 12:05:11,608 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-26 12:05:11,608 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-26 12:05:11,637 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-26 12:05:11,638 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-26 12:05:11,639 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-26 12:05:11,639 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-26 12:05:11,640 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-26 12:05:11,641 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-26 12:05:11,641 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-26 12:05:11,643 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-26 12:05:11,643 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-26 12:05:11,644 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-26 12:05:11,645 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-26 12:05:11,645 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-26 12:05:11,646 INFO  L153        SettingsManager]:  * sizeof long=4
[2023-11-26 12:05:11,646 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-26 12:05:11,647 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2023-11-26 12:05:11,648 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-26 12:05:11,652 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-26 12:05:11,653 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-26 12:05:11,654 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-26 12:05:11,658 INFO  L153        SettingsManager]:  * sizeof long double=12
[2023-11-26 12:05:11,659 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-26 12:05:11,659 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-26 12:05:11,660 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-26 12:05:11,661 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-26 12:05:11,661 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-26 12:05:11,662 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-26 12:05:11,663 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-26 12:05:11,663 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-26 12:05:11,663 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-26 12:05:11,664 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-26 12:05:11,664 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-26 12:05:11,664 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-26 12:05:11,664 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-26 12:05:11,665 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-26 12:05:11,665 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-26 12:05:11,665 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-26 12:05:11,667 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-26 12:05:11,667 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_804bddf9-7d32-4eb9-ba08-22bf69436af1/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_804bddf9-7d32-4eb9-ba08-22bf69436af1/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 -> 0c9b36c4432c83400aecd1170e3c902f5356c89b28a319ce0e390f2a9fbc6f35
[2023-11-26 12:05:11,971 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-26 12:05:11,995 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-26 12:05:11,998 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-26 12:05:11,999 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-26 12:05:12,000 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-26 12:05:12,001 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804bddf9-7d32-4eb9-ba08-22bf69436af1/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/eca-rers2012/Problem16_label37.c
[2023-11-26 12:05:15,175 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-26 12:05:15,626 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-26 12:05:15,627 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804bddf9-7d32-4eb9-ba08-22bf69436af1/sv-benchmarks/c/eca-rers2012/Problem16_label37.c
[2023-11-26 12:05:15,652 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804bddf9-7d32-4eb9-ba08-22bf69436af1/bin/uautomizer-verify-VRDe98Ueme/data/5e1d85afd/059a09ce54544a2f95cb1c36baf6cbd7/FLAG369eff5b1
[2023-11-26 12:05:15,674 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804bddf9-7d32-4eb9-ba08-22bf69436af1/bin/uautomizer-verify-VRDe98Ueme/data/5e1d85afd/059a09ce54544a2f95cb1c36baf6cbd7
[2023-11-26 12:05:15,676 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-26 12:05:15,678 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-26 12:05:15,680 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-26 12:05:15,680 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-26 12:05:15,685 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-26 12:05:15,686 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:05:15" (1/1) ...
[2023-11-26 12:05:15,687 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38b237ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:15, skipping insertion in model container
[2023-11-26 12:05:15,688 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:05:15" (1/1) ...
[2023-11-26 12:05:15,762 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-26 12:05:15,971 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_804bddf9-7d32-4eb9-ba08-22bf69436af1/sv-benchmarks/c/eca-rers2012/Problem16_label37.c[2305,2318]
[2023-11-26 12:05:16,560 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-26 12:05:16,570 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-26 12:05:16,596 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_804bddf9-7d32-4eb9-ba08-22bf69436af1/sv-benchmarks/c/eca-rers2012/Problem16_label37.c[2305,2318]
[2023-11-26 12:05:16,855 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-26 12:05:16,875 INFO  L206         MainTranslator]: Completed translation
[2023-11-26 12:05:16,876 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:16 WrapperNode
[2023-11-26 12:05:16,876 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-26 12:05:16,878 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-26 12:05:16,878 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-26 12:05:16,879 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-26 12:05:16,887 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:16" (1/1) ...
[2023-11-26 12:05:16,939 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:16" (1/1) ...
[2023-11-26 12:05:17,079 INFO  L138                Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1769
[2023-11-26 12:05:17,080 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-26 12:05:17,081 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-26 12:05:17,081 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-26 12:05:17,081 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-26 12:05:17,092 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:16" (1/1) ...
[2023-11-26 12:05:17,093 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:16" (1/1) ...
[2023-11-26 12:05:17,105 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:16" (1/1) ...
[2023-11-26 12:05:17,245 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 12:05:17,247 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:16" (1/1) ...
[2023-11-26 12:05:17,248 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:16" (1/1) ...
[2023-11-26 12:05:17,359 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:16" (1/1) ...
[2023-11-26 12:05:17,374 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:16" (1/1) ...
[2023-11-26 12:05:17,410 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:16" (1/1) ...
[2023-11-26 12:05:17,441 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:16" (1/1) ...
[2023-11-26 12:05:17,460 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-26 12:05:17,461 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-26 12:05:17,462 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-26 12:05:17,462 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-26 12:05:17,463 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:16" (1/1) ...
[2023-11-26 12:05:17,469 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-26 12:05:17,489 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804bddf9-7d32-4eb9-ba08-22bf69436af1/bin/uautomizer-verify-VRDe98Ueme/z3
[2023-11-26 12:05:17,502 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804bddf9-7d32-4eb9-ba08-22bf69436af1/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2023-11-26 12:05:17,542 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804bddf9-7d32-4eb9-ba08-22bf69436af1/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2023-11-26 12:05:17,550 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-26 12:05:17,550 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-11-26 12:05:17,550 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-26 12:05:17,550 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-26 12:05:17,656 INFO  L241             CfgBuilder]: Building ICFG
[2023-11-26 12:05:17,658 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-26 12:05:20,132 INFO  L282             CfgBuilder]: Performing block encoding
[2023-11-26 12:05:20,215 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-26 12:05:20,215 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-26 12:05:20,216 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:05:20 BoogieIcfgContainer
[2023-11-26 12:05:20,216 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-26 12:05:20,219 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-26 12:05:20,219 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-26 12:05:20,223 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-26 12:05:20,223 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:05:15" (1/3) ...
[2023-11-26 12:05:20,224 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54d2b83e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:05:20, skipping insertion in model container
[2023-11-26 12:05:20,224 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:16" (2/3) ...
[2023-11-26 12:05:20,225 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54d2b83e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:05:20, skipping insertion in model container
[2023-11-26 12:05:20,225 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:05:20" (3/3) ...
[2023-11-26 12:05:20,226 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem16_label37.c
[2023-11-26 12:05:20,253 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-26 12:05:20,253 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-26 12:05:20,337 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-26 12:05:20,344 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;@799bf514, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-26 12:05:20,344 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-26 12:05:20,350 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 334 states, 332 states have (on average 1.9909638554216869) internal successors, (661), 333 states have internal predecessors, (661), 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 12:05:20,357 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2023-11-26 12:05:20,357 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 12:05:20,358 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 12:05:20,359 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 12:05:20,365 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 12:05:20,365 INFO  L85        PathProgramCache]: Analyzing trace with hash 1055053910, now seen corresponding path program 1 times
[2023-11-26 12:05:20,376 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 12:05:20,377 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431450347]
[2023-11-26 12:05:20,377 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 12:05:20,378 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 12:05:20,497 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 12:05:20,575 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 12:05:20,576 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 12:05:20,576 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431450347]
[2023-11-26 12:05:20,577 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431450347] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 12:05:20,577 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 12:05:20,577 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-26 12:05:20,581 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997215684]
[2023-11-26 12:05:20,582 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 12:05:20,587 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2023-11-26 12:05:20,587 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 12:05:20,632 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2023-11-26 12:05:20,633 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2023-11-26 12:05:20,638 INFO  L87              Difference]: Start difference. First operand  has 334 states, 332 states have (on average 1.9909638554216869) internal successors, (661), 333 states have internal predecessors, (661), 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 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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 12:05:20,736 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 12:05:20,737 INFO  L93              Difference]: Finished difference Result 667 states and 1321 transitions.
[2023-11-26 12:05:20,738 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2023-11-26 12:05:20,739 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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 19
[2023-11-26 12:05:20,740 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 12:05:20,754 INFO  L225             Difference]: With dead ends: 667
[2023-11-26 12:05:20,755 INFO  L226             Difference]: Without dead ends: 332
[2023-11-26 12:05:20,759 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 12:05:20,763 INFO  L413           NwaCegarLoop]: 596 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, 596 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 12:05:20,764 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 596 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-26 12:05:20,782 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 332 states.
[2023-11-26 12:05:20,821 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332.
[2023-11-26 12:05:20,823 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 332 states, 331 states have (on average 1.8006042296072509) internal successors, (596), 331 states have internal predecessors, (596), 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 12:05:20,828 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 596 transitions.
[2023-11-26 12:05:20,829 INFO  L78                 Accepts]: Start accepts. Automaton has 332 states and 596 transitions. Word has length 19
[2023-11-26 12:05:20,830 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 12:05:20,830 INFO  L495      AbstractCegarLoop]: Abstraction has 332 states and 596 transitions.
[2023-11-26 12:05:20,830 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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 12:05:20,831 INFO  L276                IsEmpty]: Start isEmpty. Operand 332 states and 596 transitions.
[2023-11-26 12:05:20,831 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2023-11-26 12:05:20,831 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 12:05:20,831 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 12:05:20,832 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-26 12:05:20,832 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 12:05:20,833 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 12:05:20,833 INFO  L85        PathProgramCache]: Analyzing trace with hash 2101873543, now seen corresponding path program 1 times
[2023-11-26 12:05:20,833 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 12:05:20,833 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46647029]
[2023-11-26 12:05:20,833 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 12:05:20,834 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 12:05:20,856 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 12:05:20,954 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 12:05:20,954 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 12:05:20,954 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46647029]
[2023-11-26 12:05:20,955 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46647029] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 12:05:20,955 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 12:05:20,955 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-26 12:05:20,956 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007631549]
[2023-11-26 12:05:20,956 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 12:05:20,958 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 12:05:20,959 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 12:05:20,960 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 12:05:20,960 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 12:05:20,962 INFO  L87              Difference]: Start difference. First operand 332 states and 596 transitions. Second operand  has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 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 12:05:23,425 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 12:05:23,426 INFO  L93              Difference]: Finished difference Result 992 states and 1785 transitions.
[2023-11-26 12:05:23,426 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 12:05:23,426 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 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 19
[2023-11-26 12:05:23,427 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 12:05:23,433 INFO  L225             Difference]: With dead ends: 992
[2023-11-26 12:05:23,433 INFO  L226             Difference]: Without dead ends: 661
[2023-11-26 12:05:23,435 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 12:05:23,437 INFO  L413           NwaCegarLoop]: 72 mSDtfsCounter, 330 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time
[2023-11-26 12:05:23,438 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 77 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time]
[2023-11-26 12:05:23,440 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 661 states.
[2023-11-26 12:05:23,477 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 661.
[2023-11-26 12:05:23,479 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 661 states, 660 states have (on average 1.7015151515151514) internal successors, (1123), 660 states have internal predecessors, (1123), 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 12:05:23,483 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1123 transitions.
[2023-11-26 12:05:23,483 INFO  L78                 Accepts]: Start accepts. Automaton has 661 states and 1123 transitions. Word has length 19
[2023-11-26 12:05:23,483 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 12:05:23,484 INFO  L495      AbstractCegarLoop]: Abstraction has 661 states and 1123 transitions.
[2023-11-26 12:05:23,484 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 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 12:05:23,484 INFO  L276                IsEmpty]: Start isEmpty. Operand 661 states and 1123 transitions.
[2023-11-26 12:05:23,487 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 86
[2023-11-26 12:05:23,488 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 12:05:23,488 INFO  L195           NwaCegarLoop]: trace histogram [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]
[2023-11-26 12:05:23,488 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-26 12:05:23,489 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 12:05:23,489 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 12:05:23,489 INFO  L85        PathProgramCache]: Analyzing trace with hash -755206650, now seen corresponding path program 1 times
[2023-11-26 12:05:23,489 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 12:05:23,490 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905807737]
[2023-11-26 12:05:23,490 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 12:05:23,490 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 12:05:23,536 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 12:05:23,744 INFO  L134       CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-26 12:05:23,744 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 12:05:23,746 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905807737]
[2023-11-26 12:05:23,746 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905807737] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 12:05:23,747 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 12:05:23,747 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-26 12:05:23,748 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992840236]
[2023-11-26 12:05:23,748 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 12:05:23,750 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 12:05:23,750 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 12:05:23,751 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 12:05:23,755 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 12:05:23,756 INFO  L87              Difference]: Start difference. First operand 661 states and 1123 transitions. Second operand  has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 12:05:25,694 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 12:05:25,694 INFO  L93              Difference]: Finished difference Result 1979 states and 3366 transitions.
[2023-11-26 12:05:25,694 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 12:05:25,695 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 85
[2023-11-26 12:05:25,695 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 12:05:25,704 INFO  L225             Difference]: With dead ends: 1979
[2023-11-26 12:05:25,704 INFO  L226             Difference]: Without dead ends: 1319
[2023-11-26 12:05:25,706 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 12:05:25,707 INFO  L413           NwaCegarLoop]: 71 mSDtfsCounter, 343 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time
[2023-11-26 12:05:25,708 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 75 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time]
[2023-11-26 12:05:25,711 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1319 states.
[2023-11-26 12:05:25,770 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1319.
[2023-11-26 12:05:25,775 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1319 states, 1318 states have (on average 1.6206373292867982) internal successors, (2136), 1318 states have internal predecessors, (2136), 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 12:05:25,782 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 2136 transitions.
[2023-11-26 12:05:25,783 INFO  L78                 Accepts]: Start accepts. Automaton has 1319 states and 2136 transitions. Word has length 85
[2023-11-26 12:05:25,783 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 12:05:25,783 INFO  L495      AbstractCegarLoop]: Abstraction has 1319 states and 2136 transitions.
[2023-11-26 12:05:25,784 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 12:05:25,784 INFO  L276                IsEmpty]: Start isEmpty. Operand 1319 states and 2136 transitions.
[2023-11-26 12:05:25,787 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 87
[2023-11-26 12:05:25,787 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 12:05:25,788 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 12:05:25,788 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-26 12:05:25,788 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 12:05:25,789 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 12:05:25,789 INFO  L85        PathProgramCache]: Analyzing trace with hash 1955472766, now seen corresponding path program 1 times
[2023-11-26 12:05:25,789 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 12:05:25,789 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879545650]
[2023-11-26 12:05:25,790 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 12:05:25,790 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 12:05:25,827 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 12:05:25,985 INFO  L134       CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-26 12:05:25,986 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 12:05:25,986 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879545650]
[2023-11-26 12:05:25,986 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879545650] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 12:05:25,986 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 12:05:25,987 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-26 12:05:25,987 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713993398]
[2023-11-26 12:05:25,987 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 12:05:25,988 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 12:05:25,988 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 12:05:25,989 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 12:05:25,989 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 12:05:25,989 INFO  L87              Difference]: Start difference. First operand 1319 states and 2136 transitions. Second operand  has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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 12:05:27,783 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 12:05:27,783 INFO  L93              Difference]: Finished difference Result 3295 states and 5284 transitions.
[2023-11-26 12:05:27,784 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 12:05:27,784 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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 86
[2023-11-26 12:05:27,785 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 12:05:27,796 INFO  L225             Difference]: With dead ends: 3295
[2023-11-26 12:05:27,797 INFO  L226             Difference]: Without dead ends: 1977
[2023-11-26 12:05:27,799 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 12:05:27,800 INFO  L413           NwaCegarLoop]: 149 mSDtfsCounter, 381 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time
[2023-11-26 12:05:27,801 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 153 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time]
[2023-11-26 12:05:27,804 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1977 states.
[2023-11-26 12:05:27,840 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 1977.
[2023-11-26 12:05:27,845 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1977 states, 1976 states have (on average 1.33248987854251) internal successors, (2633), 1976 states have internal predecessors, (2633), 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 12:05:27,852 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1977 states to 1977 states and 2633 transitions.
[2023-11-26 12:05:27,852 INFO  L78                 Accepts]: Start accepts. Automaton has 1977 states and 2633 transitions. Word has length 86
[2023-11-26 12:05:27,853 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 12:05:27,853 INFO  L495      AbstractCegarLoop]: Abstraction has 1977 states and 2633 transitions.
[2023-11-26 12:05:27,853 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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 12:05:27,854 INFO  L276                IsEmpty]: Start isEmpty. Operand 1977 states and 2633 transitions.
[2023-11-26 12:05:27,859 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 179
[2023-11-26 12:05:27,859 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 12:05:27,860 INFO  L195           NwaCegarLoop]: trace histogram [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]
[2023-11-26 12:05:27,860 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-11-26 12:05:27,860 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 12:05:27,861 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 12:05:27,861 INFO  L85        PathProgramCache]: Analyzing trace with hash -430353384, now seen corresponding path program 1 times
[2023-11-26 12:05:27,861 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 12:05:27,862 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588214784]
[2023-11-26 12:05:27,862 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 12:05:27,862 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 12:05:27,920 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 12:05:28,176 INFO  L134       CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-26 12:05:28,176 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 12:05:28,176 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588214784]
[2023-11-26 12:05:28,176 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588214784] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 12:05:28,177 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 12:05:28,177 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-26 12:05:28,177 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419021648]
[2023-11-26 12:05:28,177 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 12:05:28,178 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 12:05:28,178 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 12:05:28,179 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 12:05:28,179 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 12:05:28,180 INFO  L87              Difference]: Start difference. First operand 1977 states and 2633 transitions. Second operand  has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 12:05:29,973 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 12:05:29,973 INFO  L93              Difference]: Finished difference Result 5927 states and 7896 transitions.
[2023-11-26 12:05:29,973 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 12:05:29,974 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178
[2023-11-26 12:05:29,975 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 12:05:29,999 INFO  L225             Difference]: With dead ends: 5927
[2023-11-26 12:05:30,000 INFO  L226             Difference]: Without dead ends: 3951
[2023-11-26 12:05:30,004 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 12:05:30,007 INFO  L413           NwaCegarLoop]: 252 mSDtfsCounter, 181 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time
[2023-11-26 12:05:30,007 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 257 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time]
[2023-11-26 12:05:30,014 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3951 states.
[2023-11-26 12:05:30,085 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3951 to 3951.
[2023-11-26 12:05:30,092 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3951 states, 3950 states have (on average 1.2164556962025317) internal successors, (4805), 3950 states have internal predecessors, (4805), 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 12:05:30,104 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3951 states to 3951 states and 4805 transitions.
[2023-11-26 12:05:30,104 INFO  L78                 Accepts]: Start accepts. Automaton has 3951 states and 4805 transitions. Word has length 178
[2023-11-26 12:05:30,107 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 12:05:30,107 INFO  L495      AbstractCegarLoop]: Abstraction has 3951 states and 4805 transitions.
[2023-11-26 12:05:30,108 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 12:05:30,108 INFO  L276                IsEmpty]: Start isEmpty. Operand 3951 states and 4805 transitions.
[2023-11-26 12:05:30,117 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 265
[2023-11-26 12:05:30,117 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 12:05:30,118 INFO  L195           NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:05:30,118 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2023-11-26 12:05:30,118 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 12:05:30,119 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 12:05:30,120 INFO  L85        PathProgramCache]: Analyzing trace with hash 431089153, now seen corresponding path program 1 times
[2023-11-26 12:05:30,120 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 12:05:30,120 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234168329]
[2023-11-26 12:05:30,120 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 12:05:30,121 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 12:05:30,247 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 12:05:31,011 INFO  L134       CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-26 12:05:31,012 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 12:05:31,012 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234168329]
[2023-11-26 12:05:31,012 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234168329] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 12:05:31,012 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 12:05:31,013 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-26 12:05:31,013 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464863485]
[2023-11-26 12:05:31,013 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 12:05:31,014 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-26 12:05:31,014 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 12:05:31,015 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-26 12:05:31,016 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-26 12:05:31,016 INFO  L87              Difference]: Start difference. First operand 3951 states and 4805 transitions. Second operand  has 4 states, 4 states have (on average 66.0) internal successors, (264), 3 states have internal predecessors, (264), 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 12:05:32,895 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 12:05:32,895 INFO  L93              Difference]: Finished difference Result 8242 states and 9962 transitions.
[2023-11-26 12:05:32,896 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-26 12:05:32,896 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 66.0) internal successors, (264), 3 states have internal predecessors, (264), 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 264
[2023-11-26 12:05:32,897 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 12:05:32,924 INFO  L225             Difference]: With dead ends: 8242
[2023-11-26 12:05:32,927 INFO  L226             Difference]: Without dead ends: 4292
[2023-11-26 12:05:32,933 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-26 12:05:32,938 INFO  L413           NwaCegarLoop]: 265 mSDtfsCounter, 173 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time
[2023-11-26 12:05:32,942 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 362 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1240 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time]
[2023-11-26 12:05:32,950 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4292 states.
[2023-11-26 12:05:33,033 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4292 to 4280.
[2023-11-26 12:05:33,043 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4280 states, 4279 states have (on average 1.2012152372049545) internal successors, (5140), 4279 states have internal predecessors, (5140), 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 12:05:33,055 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4280 states to 4280 states and 5140 transitions.
[2023-11-26 12:05:33,056 INFO  L78                 Accepts]: Start accepts. Automaton has 4280 states and 5140 transitions. Word has length 264
[2023-11-26 12:05:33,063 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 12:05:33,063 INFO  L495      AbstractCegarLoop]: Abstraction has 4280 states and 5140 transitions.
[2023-11-26 12:05:33,064 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 66.0) internal successors, (264), 3 states have internal predecessors, (264), 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 12:05:33,064 INFO  L276                IsEmpty]: Start isEmpty. Operand 4280 states and 5140 transitions.
[2023-11-26 12:05:33,070 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 352
[2023-11-26 12:05:33,070 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 12:05:33,071 INFO  L195           NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:05:33,071 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2023-11-26 12:05:33,071 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 12:05:33,072 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 12:05:33,072 INFO  L85        PathProgramCache]: Analyzing trace with hash 1110279900, now seen corresponding path program 1 times
[2023-11-26 12:05:33,072 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 12:05:33,073 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380092096]
[2023-11-26 12:05:33,073 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 12:05:33,073 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 12:05:33,186 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 12:05:33,884 INFO  L134       CoverageAnalysis]: Checked inductivity of 121 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-26 12:05:33,885 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 12:05:33,885 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380092096]
[2023-11-26 12:05:33,885 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380092096] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 12:05:33,885 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 12:05:33,885 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2023-11-26 12:05:33,886 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226097658]
[2023-11-26 12:05:33,886 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 12:05:33,887 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-26 12:05:33,888 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 12:05:33,890 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-26 12:05:33,891 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42
[2023-11-26 12:05:33,891 INFO  L87              Difference]: Start difference. First operand 4280 states and 5140 transitions. Second operand  has 7 states, 7 states have (on average 50.142857142857146) internal successors, (351), 6 states have internal predecessors, (351), 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 12:05:36,221 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 12:05:36,222 INFO  L93              Difference]: Finished difference Result 8089 states and 9791 transitions.
[2023-11-26 12:05:36,223 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-11-26 12:05:36,223 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 50.142857142857146) internal successors, (351), 6 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 351
[2023-11-26 12:05:36,223 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 12:05:36,244 INFO  L225             Difference]: With dead ends: 8089
[2023-11-26 12:05:36,244 INFO  L226             Difference]: Without dead ends: 3951
[2023-11-26 12:05:36,249 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42
[2023-11-26 12:05:36,250 INFO  L413           NwaCegarLoop]: 261 mSDtfsCounter, 288 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1996 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 2181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time
[2023-11-26 12:05:36,250 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 293 Invalid, 2181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1996 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time]
[2023-11-26 12:05:36,255 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3951 states.
[2023-11-26 12:05:36,320 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3951 to 3951.
[2023-11-26 12:05:36,328 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3951 states, 3950 states have (on average 1.080253164556962) internal successors, (4267), 3950 states have internal predecessors, (4267), 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 12:05:36,339 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3951 states to 3951 states and 4267 transitions.
[2023-11-26 12:05:36,339 INFO  L78                 Accepts]: Start accepts. Automaton has 3951 states and 4267 transitions. Word has length 351
[2023-11-26 12:05:36,340 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 12:05:36,340 INFO  L495      AbstractCegarLoop]: Abstraction has 3951 states and 4267 transitions.
[2023-11-26 12:05:36,340 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 50.142857142857146) internal successors, (351), 6 states have internal predecessors, (351), 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 12:05:36,341 INFO  L276                IsEmpty]: Start isEmpty. Operand 3951 states and 4267 transitions.
[2023-11-26 12:05:36,347 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 359
[2023-11-26 12:05:36,347 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 12:05:36,347 INFO  L195           NwaCegarLoop]: trace histogram [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, 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]
[2023-11-26 12:05:36,348 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2023-11-26 12:05:36,348 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 12:05:36,348 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 12:05:36,349 INFO  L85        PathProgramCache]: Analyzing trace with hash -1982629094, now seen corresponding path program 1 times
[2023-11-26 12:05:36,349 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 12:05:36,349 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899505904]
[2023-11-26 12:05:36,349 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 12:05:36,350 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 12:05:36,483 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 12:05:37,080 INFO  L134       CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked.
[2023-11-26 12:05:37,080 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 12:05:37,081 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899505904]
[2023-11-26 12:05:37,081 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899505904] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-26 12:05:37,081 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547851496]
[2023-11-26 12:05:37,081 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 12:05:37,082 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-26 12:05:37,082 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804bddf9-7d32-4eb9-ba08-22bf69436af1/bin/uautomizer-verify-VRDe98Ueme/z3
[2023-11-26 12:05:37,085 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804bddf9-7d32-4eb9-ba08-22bf69436af1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-26 12:05:37,102 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804bddf9-7d32-4eb9-ba08-22bf69436af1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-26 12:05:37,318 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 12:05:37,322 INFO  L262         TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 2 conjunts are in the unsatisfiable core
[2023-11-26 12:05:37,350 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-26 12:05:37,449 INFO  L134       CoverageAnalysis]: Checked inductivity of 130 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked.
[2023-11-26 12:05:37,450 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-26 12:05:37,450 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [547851496] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 12:05:37,450 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-26 12:05:37,451 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5
[2023-11-26 12:05:37,451 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447896070]
[2023-11-26 12:05:37,451 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 12:05:37,452 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 12:05:37,453 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 12:05:37,454 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 12:05:37,454 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-26 12:05:37,454 INFO  L87              Difference]: Start difference. First operand 3951 states and 4267 transitions. Second operand  has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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 12:05:38,740 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 12:05:38,740 INFO  L93              Difference]: Finished difference Result 9546 states and 10413 transitions.
[2023-11-26 12:05:38,741 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 12:05:38,741 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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 358
[2023-11-26 12:05:38,742 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 12:05:38,787 INFO  L225             Difference]: With dead ends: 9546
[2023-11-26 12:05:38,787 INFO  L226             Difference]: Without dead ends: 5925
[2023-11-26 12:05:38,807 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-26 12:05:38,808 INFO  L413           NwaCegarLoop]: 33 mSDtfsCounter, 328 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time
[2023-11-26 12:05:38,808 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 38 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time]
[2023-11-26 12:05:38,816 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5925 states.
[2023-11-26 12:05:38,911 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5925 to 5925.
[2023-11-26 12:05:38,921 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5925 states, 5924 states have (on average 1.0828831870357867) internal successors, (6415), 5924 states have internal predecessors, (6415), 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 12:05:38,937 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5925 states to 5925 states and 6415 transitions.
[2023-11-26 12:05:38,938 INFO  L78                 Accepts]: Start accepts. Automaton has 5925 states and 6415 transitions. Word has length 358
[2023-11-26 12:05:38,938 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 12:05:38,939 INFO  L495      AbstractCegarLoop]: Abstraction has 5925 states and 6415 transitions.
[2023-11-26 12:05:38,939 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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 12:05:38,939 INFO  L276                IsEmpty]: Start isEmpty. Operand 5925 states and 6415 transitions.
[2023-11-26 12:05:38,949 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 476
[2023-11-26 12:05:38,950 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 12:05:38,950 INFO  L195           NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 12:05:38,968 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804bddf9-7d32-4eb9-ba08-22bf69436af1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-26 12:05:39,157 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804bddf9-7d32-4eb9-ba08-22bf69436af1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7
[2023-11-26 12:05:39,157 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 12:05:39,157 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 12:05:39,158 INFO  L85        PathProgramCache]: Analyzing trace with hash -1032875318, now seen corresponding path program 1 times
[2023-11-26 12:05:39,158 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 12:05:39,158 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598018508]
[2023-11-26 12:05:39,158 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 12:05:39,158 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 12:05:39,284 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 12:05:39,948 INFO  L134       CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked.
[2023-11-26 12:05:39,952 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 12:05:39,952 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598018508]
[2023-11-26 12:05:39,952 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598018508] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-26 12:05:39,953 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552702430]
[2023-11-26 12:05:39,953 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 12:05:39,953 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-26 12:05:39,953 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804bddf9-7d32-4eb9-ba08-22bf69436af1/bin/uautomizer-verify-VRDe98Ueme/z3
[2023-11-26 12:05:39,954 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804bddf9-7d32-4eb9-ba08-22bf69436af1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-26 12:05:39,979 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804bddf9-7d32-4eb9-ba08-22bf69436af1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-26 12:05:40,183 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 12:05:40,185 INFO  L262         TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 2 conjunts are in the unsatisfiable core
[2023-11-26 12:05:40,198 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-26 12:05:40,286 INFO  L134       CoverageAnalysis]: Checked inductivity of 255 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked.
[2023-11-26 12:05:40,286 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-26 12:05:40,287 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [552702430] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 12:05:40,287 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-26 12:05:40,287 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5
[2023-11-26 12:05:40,288 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269599008]
[2023-11-26 12:05:40,288 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 12:05:40,289 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 12:05:40,289 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 12:05:40,289 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 12:05:40,290 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-26 12:05:40,290 INFO  L87              Difference]: Start difference. First operand 5925 states and 6415 transitions. Second operand  has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 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 12:05:41,475 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 12:05:41,475 INFO  L93              Difference]: Finished difference Result 13494 states and 14709 transitions.
[2023-11-26 12:05:41,483 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 12:05:41,483 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 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 475
[2023-11-26 12:05:41,485 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 12:05:41,520 INFO  L225             Difference]: With dead ends: 13494
[2023-11-26 12:05:41,520 INFO  L226             Difference]: Without dead ends: 7899
[2023-11-26 12:05:41,528 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-26 12:05:41,529 INFO  L413           NwaCegarLoop]: 26 mSDtfsCounter, 329 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time
[2023-11-26 12:05:41,529 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 31 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time]
[2023-11-26 12:05:41,538 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7899 states.
[2023-11-26 12:05:41,646 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7899 to 7570.
[2023-11-26 12:05:41,659 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7570 states, 7569 states have (on average 1.0908970801955344) internal successors, (8257), 7569 states have internal predecessors, (8257), 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 12:05:41,672 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7570 states to 7570 states and 8257 transitions.
[2023-11-26 12:05:41,672 INFO  L78                 Accepts]: Start accepts. Automaton has 7570 states and 8257 transitions. Word has length 475
[2023-11-26 12:05:41,673 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 12:05:41,674 INFO  L495      AbstractCegarLoop]: Abstraction has 7570 states and 8257 transitions.
[2023-11-26 12:05:41,674 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 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 12:05:41,674 INFO  L276                IsEmpty]: Start isEmpty. Operand 7570 states and 8257 transitions.
[2023-11-26 12:05:41,689 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 543
[2023-11-26 12:05:41,689 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 12:05:41,690 INFO  L195           NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2023-11-26 12:05:41,707 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804bddf9-7d32-4eb9-ba08-22bf69436af1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2023-11-26 12:05:41,896 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804bddf9-7d32-4eb9-ba08-22bf69436af1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8
[2023-11-26 12:05:41,897 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 12:05:41,897 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 12:05:41,897 INFO  L85        PathProgramCache]: Analyzing trace with hash -853453568, now seen corresponding path program 1 times
[2023-11-26 12:05:41,897 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 12:05:41,897 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343039320]
[2023-11-26 12:05:41,898 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 12:05:41,898 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 12:05:42,025 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 12:05:43,546 INFO  L134       CoverageAnalysis]: Checked inductivity of 269 backedges. 35 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-26 12:05:43,546 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 12:05:43,546 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343039320]
[2023-11-26 12:05:43,546 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343039320] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-26 12:05:43,547 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711678838]
[2023-11-26 12:05:43,547 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 12:05:43,547 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-26 12:05:43,547 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804bddf9-7d32-4eb9-ba08-22bf69436af1/bin/uautomizer-verify-VRDe98Ueme/z3
[2023-11-26 12:05:43,551 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804bddf9-7d32-4eb9-ba08-22bf69436af1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-26 12:05:43,571 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804bddf9-7d32-4eb9-ba08-22bf69436af1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-26 12:05:43,783 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 12:05:43,786 INFO  L262         TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 2 conjunts are in the unsatisfiable core
[2023-11-26 12:05:43,795 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-26 12:05:44,624 INFO  L134       CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked.
[2023-11-26 12:05:44,624 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-26 12:05:44,625 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711678838] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 12:05:44,625 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-26 12:05:44,625 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7
[2023-11-26 12:05:44,626 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899698057]
[2023-11-26 12:05:44,626 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 12:05:44,627 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 12:05:44,627 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 12:05:44,628 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 12:05:44,628 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56
[2023-11-26 12:05:44,628 INFO  L87              Difference]: Start difference. First operand 7570 states and 8257 transitions. Second operand  has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 2 states have internal predecessors, (292), 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 12:05:45,655 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 12:05:45,655 INFO  L93              Difference]: Finished difference Result 9546 states and 10296 transitions.
[2023-11-26 12:05:45,655 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 12:05:45,656 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 2 states have internal predecessors, (292), 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 542
[2023-11-26 12:05:45,657 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 12:05:45,674 INFO  L225             Difference]: With dead ends: 9546
[2023-11-26 12:05:45,674 INFO  L226             Difference]: Without dead ends: 9544
[2023-11-26 12:05:45,677 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 541 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56
[2023-11-26 12:05:45,678 INFO  L413           NwaCegarLoop]: 76 mSDtfsCounter, 63 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time
[2023-11-26 12:05:45,679 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 81 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time]
[2023-11-26 12:05:45,690 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9544 states.
[2023-11-26 12:05:45,783 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9544 to 7570.
[2023-11-26 12:05:45,800 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7570 states, 7569 states have (on average 1.090764962346413) internal successors, (8256), 7569 states have internal predecessors, (8256), 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 12:05:45,811 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7570 states to 7570 states and 8256 transitions.
[2023-11-26 12:05:45,812 INFO  L78                 Accepts]: Start accepts. Automaton has 7570 states and 8256 transitions. Word has length 542
[2023-11-26 12:05:45,813 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 12:05:45,813 INFO  L495      AbstractCegarLoop]: Abstraction has 7570 states and 8256 transitions.
[2023-11-26 12:05:45,814 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 2 states have internal predecessors, (292), 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 12:05:45,814 INFO  L276                IsEmpty]: Start isEmpty. Operand 7570 states and 8256 transitions.
[2023-11-26 12:05:45,830 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 889
[2023-11-26 12:05:45,830 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 12:05:45,832 INFO  L195           NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 12:05:45,849 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804bddf9-7d32-4eb9-ba08-22bf69436af1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2023-11-26 12:05:46,038 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804bddf9-7d32-4eb9-ba08-22bf69436af1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2023-11-26 12:05:46,038 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 12:05:46,039 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 12:05:46,039 INFO  L85        PathProgramCache]: Analyzing trace with hash 454672487, now seen corresponding path program 1 times
[2023-11-26 12:05:46,039 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 12:05:46,039 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491091745]
[2023-11-26 12:05:46,039 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 12:05:46,039 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 12:05:46,231 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 12:05:47,527 INFO  L134       CoverageAnalysis]: Checked inductivity of 1558 backedges. 809 proven. 0 refuted. 0 times theorem prover too weak. 749 trivial. 0 not checked.
[2023-11-26 12:05:47,528 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 12:05:47,528 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491091745]
[2023-11-26 12:05:47,528 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491091745] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 12:05:47,528 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 12:05:47,529 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-26 12:05:47,529 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939934968]
[2023-11-26 12:05:47,529 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 12:05:47,530 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 12:05:47,530 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 12:05:47,531 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 12:05:47,531 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 12:05:47,532 INFO  L87              Difference]: Start difference. First operand 7570 states and 8256 transitions. Second operand  has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 2 states have internal predecessors, (397), 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 12:05:48,727 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 12:05:48,728 INFO  L93              Difference]: Finished difference Result 15139 states and 16517 transitions.
[2023-11-26 12:05:48,728 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 12:05:48,728 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 2 states have internal predecessors, (397), 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 888
[2023-11-26 12:05:48,729 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 12:05:48,742 INFO  L225             Difference]: With dead ends: 15139
[2023-11-26 12:05:48,742 INFO  L226             Difference]: Without dead ends: 7899
[2023-11-26 12:05:48,750 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 12:05:48,750 INFO  L413           NwaCegarLoop]: 103 mSDtfsCounter, 85 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time
[2023-11-26 12:05:48,751 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 108 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time]
[2023-11-26 12:05:48,760 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7899 states.
[2023-11-26 12:05:48,844 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7899 to 7899.
[2023-11-26 12:05:48,853 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7899 states, 7898 states have (on average 1.0878703469232718) internal successors, (8592), 7898 states have internal predecessors, (8592), 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 12:05:48,866 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7899 states to 7899 states and 8592 transitions.
[2023-11-26 12:05:48,866 INFO  L78                 Accepts]: Start accepts. Automaton has 7899 states and 8592 transitions. Word has length 888
[2023-11-26 12:05:48,867 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 12:05:48,867 INFO  L495      AbstractCegarLoop]: Abstraction has 7899 states and 8592 transitions.
[2023-11-26 12:05:48,868 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 2 states have internal predecessors, (397), 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 12:05:48,868 INFO  L276                IsEmpty]: Start isEmpty. Operand 7899 states and 8592 transitions.
[2023-11-26 12:05:48,887 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 897
[2023-11-26 12:05:48,887 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 12:05:48,888 INFO  L195           NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 12:05:48,888 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10
[2023-11-26 12:05:48,888 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 12:05:48,889 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 12:05:48,889 INFO  L85        PathProgramCache]: Analyzing trace with hash -912143789, now seen corresponding path program 1 times
[2023-11-26 12:05:48,889 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 12:05:48,889 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213774766]
[2023-11-26 12:05:48,890 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 12:05:48,890 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 12:05:49,154 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 12:05:49,817 INFO  L134       CoverageAnalysis]: Checked inductivity of 1566 backedges. 888 proven. 0 refuted. 0 times theorem prover too weak. 678 trivial. 0 not checked.
[2023-11-26 12:05:49,817 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 12:05:49,817 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213774766]
[2023-11-26 12:05:49,817 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213774766] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 12:05:49,818 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 12:05:49,818 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-26 12:05:49,818 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667165829]
[2023-11-26 12:05:49,818 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 12:05:49,819 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 12:05:49,820 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 12:05:49,821 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 12:05:49,821 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 12:05:49,821 INFO  L87              Difference]: Start difference. First operand 7899 states and 8592 transitions. Second operand  has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 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 12:05:51,100 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 12:05:51,100 INFO  L93              Difference]: Finished difference Result 19416 states and 21298 transitions.
[2023-11-26 12:05:51,107 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 12:05:51,107 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 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 896
[2023-11-26 12:05:51,109 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 12:05:51,126 INFO  L225             Difference]: With dead ends: 19416
[2023-11-26 12:05:51,127 INFO  L226             Difference]: Without dead ends: 10531
[2023-11-26 12:05:51,136 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 12:05:51,137 INFO  L413           NwaCegarLoop]: 422 mSDtfsCounter, 270 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time
[2023-11-26 12:05:51,137 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 427 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time]
[2023-11-26 12:05:51,150 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10531 states.
[2023-11-26 12:05:51,257 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10531 to 10202.
[2023-11-26 12:05:51,269 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10202 states, 10201 states have (on average 1.0729340260758748) internal successors, (10945), 10201 states have internal predecessors, (10945), 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 12:05:51,282 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10202 states to 10202 states and 10945 transitions.
[2023-11-26 12:05:51,282 INFO  L78                 Accepts]: Start accepts. Automaton has 10202 states and 10945 transitions. Word has length 896
[2023-11-26 12:05:51,284 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 12:05:51,284 INFO  L495      AbstractCegarLoop]: Abstraction has 10202 states and 10945 transitions.
[2023-11-26 12:05:51,285 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 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 12:05:51,285 INFO  L276                IsEmpty]: Start isEmpty. Operand 10202 states and 10945 transitions.
[2023-11-26 12:05:51,312 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1192
[2023-11-26 12:05:51,312 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 12:05:51,313 INFO  L195           NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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]
[2023-11-26 12:05:51,313 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11
[2023-11-26 12:05:51,314 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 12:05:51,314 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 12:05:51,314 INFO  L85        PathProgramCache]: Analyzing trace with hash 1082786834, now seen corresponding path program 1 times
[2023-11-26 12:05:51,315 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 12:05:51,315 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273984082]
[2023-11-26 12:05:51,315 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 12:05:51,315 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 12:05:51,555 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 12:05:53,420 INFO  L134       CoverageAnalysis]: Checked inductivity of 2538 backedges. 1775 proven. 0 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked.
[2023-11-26 12:05:53,420 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 12:05:53,420 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273984082]
[2023-11-26 12:05:53,420 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273984082] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 12:05:53,420 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 12:05:53,421 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2023-11-26 12:05:53,421 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773859621]
[2023-11-26 12:05:53,421 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 12:05:53,423 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-26 12:05:53,423 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 12:05:53,424 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-26 12:05:53,424 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2023-11-26 12:05:53,425 INFO  L87              Difference]: Start difference. First operand 10202 states and 10945 transitions. Second operand  has 6 states, 6 states have (on average 115.33333333333333) internal successors, (692), 6 states have internal predecessors, (692), 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 12:05:55,104 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 12:05:55,105 INFO  L93              Difference]: Finished difference Result 20433 states and 21937 transitions.
[2023-11-26 12:05:55,105 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-11-26 12:05:55,105 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 115.33333333333333) internal successors, (692), 6 states have internal predecessors, (692), 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 1191
[2023-11-26 12:05:55,108 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 12:05:55,128 INFO  L225             Difference]: With dead ends: 20433
[2023-11-26 12:05:55,128 INFO  L226             Difference]: Without dead ends: 10890
[2023-11-26 12:05:55,140 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2023-11-26 12:05:55,141 INFO  L413           NwaCegarLoop]: 429 mSDtfsCounter, 452 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 1632 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time
[2023-11-26 12:05:55,141 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 562 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1632 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time]
[2023-11-26 12:05:55,152 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10890 states.
[2023-11-26 12:05:55,291 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10890 to 10860.
[2023-11-26 12:05:55,304 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10860 states, 10859 states have (on average 1.0689750437425176) internal successors, (11608), 10859 states have internal predecessors, (11608), 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 12:05:55,317 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10860 states to 10860 states and 11608 transitions.
[2023-11-26 12:05:55,317 INFO  L78                 Accepts]: Start accepts. Automaton has 10860 states and 11608 transitions. Word has length 1191
[2023-11-26 12:05:55,319 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 12:05:55,320 INFO  L495      AbstractCegarLoop]: Abstraction has 10860 states and 11608 transitions.
[2023-11-26 12:05:55,320 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 115.33333333333333) internal successors, (692), 6 states have internal predecessors, (692), 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 12:05:55,320 INFO  L276                IsEmpty]: Start isEmpty. Operand 10860 states and 11608 transitions.
[2023-11-26 12:05:55,348 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1206
[2023-11-26 12:05:55,348 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 12:05:55,349 INFO  L195           NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:05:55,350 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12
[2023-11-26 12:05:55,350 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 12:05:55,350 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 12:05:55,351 INFO  L85        PathProgramCache]: Analyzing trace with hash 548788443, now seen corresponding path program 1 times
[2023-11-26 12:05:55,351 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 12:05:55,351 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039153771]
[2023-11-26 12:05:55,352 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 12:05:55,352 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 12:05:55,595 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 12:05:57,333 INFO  L134       CoverageAnalysis]: Checked inductivity of 2425 backedges. 1699 proven. 0 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked.
[2023-11-26 12:05:57,333 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 12:05:57,333 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039153771]
[2023-11-26 12:05:57,334 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039153771] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 12:05:57,334 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 12:05:57,334 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-26 12:05:57,334 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940311243]
[2023-11-26 12:05:57,335 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 12:05:57,336 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-26 12:05:57,336 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 12:05:57,338 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-26 12:05:57,338 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-26 12:05:57,338 INFO  L87              Difference]: Start difference. First operand 10860 states and 11608 transitions. Second operand  has 4 states, 4 states have (on average 172.75) internal successors, (691), 4 states have internal predecessors, (691), 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 12:05:58,649 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 12:05:58,649 INFO  L93              Difference]: Finished difference Result 21070 states and 22557 transitions.
[2023-11-26 12:05:58,650 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-26 12:05:58,650 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 172.75) internal successors, (691), 4 states have internal predecessors, (691), 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 1205
[2023-11-26 12:05:58,652 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 12:05:58,671 INFO  L225             Difference]: With dead ends: 21070
[2023-11-26 12:05:58,672 INFO  L226             Difference]: Without dead ends: 10869
[2023-11-26 12:05:58,683 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-26 12:05:58,684 INFO  L413           NwaCegarLoop]: 428 mSDtfsCounter, 262 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time
[2023-11-26 12:05:58,684 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 439 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1284 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time]
[2023-11-26 12:05:58,695 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10869 states.
[2023-11-26 12:05:58,875 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10869 to 10531.
[2023-11-26 12:05:58,884 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10531 states, 10530 states have (on average 1.070275403608737) internal successors, (11270), 10530 states have internal predecessors, (11270), 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 12:05:58,897 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10531 states to 10531 states and 11270 transitions.
[2023-11-26 12:05:58,897 INFO  L78                 Accepts]: Start accepts. Automaton has 10531 states and 11270 transitions. Word has length 1205
[2023-11-26 12:05:58,898 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 12:05:58,899 INFO  L495      AbstractCegarLoop]: Abstraction has 10531 states and 11270 transitions.
[2023-11-26 12:05:58,899 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 172.75) internal successors, (691), 4 states have internal predecessors, (691), 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 12:05:58,899 INFO  L276                IsEmpty]: Start isEmpty. Operand 10531 states and 11270 transitions.
[2023-11-26 12:05:58,927 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1208
[2023-11-26 12:05:58,927 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 12:05:58,928 INFO  L195           NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 12:05:58,928 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13
[2023-11-26 12:05:58,928 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 12:05:58,929 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 12:05:58,929 INFO  L85        PathProgramCache]: Analyzing trace with hash 690112979, now seen corresponding path program 1 times
[2023-11-26 12:05:58,930 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 12:05:58,930 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871308967]
[2023-11-26 12:05:58,930 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 12:05:58,930 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 12:05:59,175 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat