./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem19_label49.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 53f42b1a
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem19_label49.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --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 4dab15ca8d564215247ed99810908aedd9e5c3b287c9c31800ebdafb000d0f0d
--- Real Ultimate output ---
This is Ultimate 0.2.1-dev-53f42b1
[2021-11-20 05:50:56,418 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2021-11-20 05:50:56,420 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2021-11-20 05:50:56,472 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-11-20 05:50:56,473 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-11-20 05:50:56,478 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-11-20 05:50:56,480 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-11-20 05:50:56,484 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2021-11-20 05:50:56,487 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-11-20 05:50:56,494 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-11-20 05:50:56,495 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2021-11-20 05:50:56,497 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2021-11-20 05:50:56,498 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-11-20 05:50:56,501 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-11-20 05:50:56,504 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-11-20 05:50:56,513 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-11-20 05:50:56,515 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-11-20 05:50:56,516 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-11-20 05:50:56,519 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-11-20 05:50:56,528 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2021-11-20 05:50:56,530 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-11-20 05:50:56,532 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-11-20 05:50:56,535 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2021-11-20 05:50:56,537 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-11-20 05:50:56,547 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2021-11-20 05:50:56,548 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2021-11-20 05:50:56,548 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2021-11-20 05:50:56,550 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2021-11-20 05:50:56,551 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2021-11-20 05:50:56,553 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2021-11-20 05:50:56,554 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2021-11-20 05:50:56,555 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2021-11-20 05:50:56,557 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2021-11-20 05:50:56,558 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2021-11-20 05:50:56,560 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2021-11-20 05:50:56,561 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2021-11-20 05:50:56,562 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2021-11-20 05:50:56,562 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2021-11-20 05:50:56,562 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2021-11-20 05:50:56,563 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2021-11-20 05:50:56,564 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2021-11-20 05:50:56,566 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf
[2021-11-20 05:50:56,621 INFO  L113        SettingsManager]: Loading preferences was successful
[2021-11-20 05:50:56,622 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2021-11-20 05:50:56,623 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2021-11-20 05:50:56,623 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2021-11-20 05:50:56,624 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2021-11-20 05:50:56,625 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2021-11-20 05:50:56,626 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2021-11-20 05:50:56,626 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2021-11-20 05:50:56,626 INFO  L138        SettingsManager]:  * Use SBE=true
[2021-11-20 05:50:56,627 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-11-20 05:50:56,628 INFO  L138        SettingsManager]:  * sizeof long=4
[2021-11-20 05:50:56,628 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2021-11-20 05:50:56,629 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2021-11-20 05:50:56,629 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2021-11-20 05:50:56,629 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2021-11-20 05:50:56,630 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-11-20 05:50:56,630 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2021-11-20 05:50:56,630 INFO  L138        SettingsManager]:  * sizeof long double=12
[2021-11-20 05:50:56,630 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2021-11-20 05:50:56,631 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2021-11-20 05:50:56,631 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2021-11-20 05:50:56,631 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-11-20 05:50:56,632 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2021-11-20 05:50:56,632 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2021-11-20 05:50:56,632 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-11-20 05:50:56,632 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-11-20 05:50:56,633 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2021-11-20 05:50:56,633 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2021-11-20 05:50:56,633 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2021-11-20 05:50:56,635 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2021-11-20 05:50:56,635 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2021-11-20 05:50:56,636 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2021-11-20 05:50:56,636 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-11-20 05:50:56,636 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2021-11-20 05:50:56,637 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
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_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/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_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
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 -> 4dab15ca8d564215247ed99810908aedd9e5c3b287c9c31800ebdafb000d0f0d
[2021-11-20 05:50:56,979 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2021-11-20 05:50:57,003 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-11-20 05:50:57,006 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-11-20 05:50:57,008 INFO  L271        PluginConnector]: Initializing CDTParser...
[2021-11-20 05:50:57,009 INFO  L275        PluginConnector]: CDTParser initialized
[2021-11-20 05:50:57,010 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/eca-rers2012/Problem19_label49.c
[2021-11-20 05:50:57,094 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/data/17628cc82/214c37caf3344fbb979ab33b9f53ac5f/FLAGf0dc43b09
[2021-11-20 05:50:58,022 INFO  L306              CDTParser]: Found 1 translation units.
[2021-11-20 05:50:58,023 INFO  L160              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/sv-benchmarks/c/eca-rers2012/Problem19_label49.c
[2021-11-20 05:50:58,074 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/data/17628cc82/214c37caf3344fbb979ab33b9f53ac5f/FLAGf0dc43b09
[2021-11-20 05:50:58,558 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/data/17628cc82/214c37caf3344fbb979ab33b9f53ac5f
[2021-11-20 05:50:58,560 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-11-20 05:50:58,562 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2021-11-20 05:50:58,563 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-11-20 05:50:58,563 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-11-20 05:50:58,569 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2021-11-20 05:50:58,570 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:50:58" (1/1) ...
[2021-11-20 05:50:58,571 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1834f7c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:50:58, skipping insertion in model container
[2021-11-20 05:50:58,571 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:50:58" (1/1) ...
[2021-11-20 05:50:58,578 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2021-11-20 05:50:58,789 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2021-11-20 05:50:59,232 WARN  L230   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_451a4e75-03a7-4bc1-a574-01b94f01ba3c/sv-benchmarks/c/eca-rers2012/Problem19_label49.c[5659,5672]
[2021-11-20 05:51:00,974 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2021-11-20 05:51:00,983 INFO  L203         MainTranslator]: Completed pre-run
[2021-11-20 05:51:01,021 WARN  L230   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_451a4e75-03a7-4bc1-a574-01b94f01ba3c/sv-benchmarks/c/eca-rers2012/Problem19_label49.c[5659,5672]
[2021-11-20 05:51:02,187 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2021-11-20 05:51:02,230 INFO  L208         MainTranslator]: Completed translation
[2021-11-20 05:51:02,230 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:51:02 WrapperNode
[2021-11-20 05:51:02,230 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-11-20 05:51:02,232 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2021-11-20 05:51:02,232 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2021-11-20 05:51:02,232 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2021-11-20 05:51:02,239 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:51:02" (1/1) ...
[2021-11-20 05:51:02,351 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:51:02" (1/1) ...
[2021-11-20 05:51:03,650 INFO  L137                Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425
[2021-11-20 05:51:03,650 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2021-11-20 05:51:03,651 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-11-20 05:51:03,651 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2021-11-20 05:51:03,651 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2021-11-20 05:51:03,660 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:51:02" (1/1) ...
[2021-11-20 05:51:03,660 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:51:02" (1/1) ...
[2021-11-20 05:51:03,774 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:51:02" (1/1) ...
[2021-11-20 05:51:03,775 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:51:02" (1/1) ...
[2021-11-20 05:51:04,155 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:51:02" (1/1) ...
[2021-11-20 05:51:04,209 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:51:02" (1/1) ...
[2021-11-20 05:51:04,236 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:51:02" (1/1) ...
[2021-11-20 05:51:04,347 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-11-20 05:51:04,348 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-11-20 05:51:04,349 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2021-11-20 05:51:04,349 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2021-11-20 05:51:04,350 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:51:02" (1/1) ...
[2021-11-20 05:51:04,358 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-11-20 05:51:04,369 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/z3
[2021-11-20 05:51:04,384 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2021-11-20 05:51:04,399 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2021-11-20 05:51:04,434 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2021-11-20 05:51:04,434 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2021-11-20 05:51:04,435 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-11-20 05:51:04,435 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-11-20 05:51:04,558 INFO  L236             CfgBuilder]: Building ICFG
[2021-11-20 05:51:04,559 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2021-11-20 05:51:13,144 INFO  L277             CfgBuilder]: Performing block encoding
[2021-11-20 05:51:13,170 INFO  L296             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-11-20 05:51:13,170 INFO  L301             CfgBuilder]: Removed 1 assume(true) statements.
[2021-11-20 05:51:13,174 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:51:13 BoogieIcfgContainer
[2021-11-20 05:51:13,174 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-11-20 05:51:13,176 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-11-20 05:51:13,177 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2021-11-20 05:51:13,180 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2021-11-20 05:51:13,180 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:50:58" (1/3) ...
[2021-11-20 05:51:13,181 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dd9f8ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:51:13, skipping insertion in model container
[2021-11-20 05:51:13,181 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:51:02" (2/3) ...
[2021-11-20 05:51:13,182 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dd9f8ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:51:13, skipping insertion in model container
[2021-11-20 05:51:13,182 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:51:13" (3/3) ...
[2021-11-20 05:51:13,183 INFO  L111   eAbstractionObserver]: Analyzing ICFG Problem19_label49.c
[2021-11-20 05:51:13,189 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2021-11-20 05:51:13,189 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2021-11-20 05:51:13,247 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2021-11-20 05:51:13,254 INFO  L339      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=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR
[2021-11-20 05:51:13,254 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-11-20 05:51:13,300 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 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)
[2021-11-20 05:51:13,307 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 43
[2021-11-20 05:51:13,307 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-20 05:51:13,308 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-20 05:51:13,309 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-20 05:51:13,314 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-20 05:51:13,314 INFO  L85        PathProgramCache]: Analyzing trace with hash 1824112922, now seen corresponding path program 1 times
[2021-11-20 05:51:13,323 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-20 05:51:13,324 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144796221]
[2021-11-20 05:51:13,324 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 05:51:13,325 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-20 05:51:13,442 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 05:51:13,600 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-20 05:51:13,615 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-20 05:51:13,615 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144796221]
[2021-11-20 05:51:13,616 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144796221] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-20 05:51:13,616 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-20 05:51:13,616 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-11-20 05:51:13,618 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886622298]
[2021-11-20 05:51:13,619 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-20 05:51:13,623 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2021-11-20 05:51:13,623 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-20 05:51:13,648 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-11-20 05:51:13,659 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2021-11-20 05:51:13,666 INFO  L87              Difference]: Start difference. First operand  has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 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 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 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)
[2021-11-20 05:51:29,948 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-20 05:51:29,948 INFO  L93              Difference]: Finished difference Result 6335 states and 12139 transitions.
[2021-11-20 05:51:29,949 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2021-11-20 05:51:29,950 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 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 42
[2021-11-20 05:51:29,951 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-20 05:51:29,997 INFO  L225             Difference]: With dead ends: 6335
[2021-11-20 05:51:29,997 INFO  L226             Difference]: Without dead ends: 4520
[2021-11-20 05:51:30,006 INFO  L932         BasicCegarLoop]: 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
[2021-11-20 05:51:30,010 INFO  L933         BasicCegarLoop]: 1911 mSDtfsCounter, 4269 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 11295 mSolverCounterSat, 2250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4269 SdHoareTripleChecker+Valid, 2185 SdHoareTripleChecker+Invalid, 13545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2250 IncrementalHoareTripleChecker+Valid, 11295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time
[2021-11-20 05:51:30,012 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [4269 Valid, 2185 Invalid, 13545 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2250 Valid, 11295 Invalid, 0 Unknown, 0 Unchecked, 15.8s Time]
[2021-11-20 05:51:30,035 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4520 states.
[2021-11-20 05:51:30,193 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4520 to 4469.
[2021-11-20 05:51:30,205 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4469 states, 4468 states have (on average 1.5980304386750224) internal successors, (7140), 4468 states have internal predecessors, (7140), 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)
[2021-11-20 05:51:30,227 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4469 states to 4469 states and 7140 transitions.
[2021-11-20 05:51:30,229 INFO  L78                 Accepts]: Start accepts. Automaton has 4469 states and 7140 transitions. Word has length 42
[2021-11-20 05:51:30,229 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-20 05:51:30,229 INFO  L470      AbstractCegarLoop]: Abstraction has 4469 states and 7140 transitions.
[2021-11-20 05:51:30,230 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 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)
[2021-11-20 05:51:30,230 INFO  L276                IsEmpty]: Start isEmpty. Operand 4469 states and 7140 transitions.
[2021-11-20 05:51:30,240 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 278
[2021-11-20 05:51:30,241 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-20 05:51:30,242 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-20 05:51:30,242 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-11-20 05:51:30,243 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-20 05:51:30,243 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-20 05:51:30,244 INFO  L85        PathProgramCache]: Analyzing trace with hash -350196237, now seen corresponding path program 1 times
[2021-11-20 05:51:30,244 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-20 05:51:30,244 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617932237]
[2021-11-20 05:51:30,245 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 05:51:30,245 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-20 05:51:30,354 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 05:51:30,856 INFO  L134       CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-20 05:51:30,856 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-20 05:51:30,856 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617932237]
[2021-11-20 05:51:30,857 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617932237] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-20 05:51:30,857 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-20 05:51:30,857 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-11-20 05:51:30,857 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814228903]
[2021-11-20 05:51:30,857 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-20 05:51:30,859 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2021-11-20 05:51:30,860 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-20 05:51:30,860 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-11-20 05:51:30,860 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-11-20 05:51:30,861 INFO  L87              Difference]: Start difference. First operand 4469 states and 7140 transitions. Second operand  has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 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)
[2021-11-20 05:51:38,987 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-20 05:51:38,987 INFO  L93              Difference]: Finished difference Result 7602 states and 12932 transitions.
[2021-11-20 05:51:38,988 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2021-11-20 05:51:38,988 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 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 277
[2021-11-20 05:51:38,990 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-20 05:51:39,015 INFO  L225             Difference]: With dead ends: 7602
[2021-11-20 05:51:39,016 INFO  L226             Difference]: Without dead ends: 4469
[2021-11-20 05:51:39,020 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-11-20 05:51:39,022 INFO  L933         BasicCegarLoop]: 1771 mSDtfsCounter, 1140 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 7327 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 2113 SdHoareTripleChecker+Invalid, 7335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 7327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time
[2021-11-20 05:51:39,022 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1140 Valid, 2113 Invalid, 7335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 7327 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time]
[2021-11-20 05:51:39,029 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4469 states.
[2021-11-20 05:51:39,110 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 4469.
[2021-11-20 05:51:39,121 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4469 states, 4468 states have (on average 1.596016114592659) internal successors, (7131), 4468 states have internal predecessors, (7131), 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)
[2021-11-20 05:51:39,133 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4469 states to 4469 states and 7131 transitions.
[2021-11-20 05:51:39,133 INFO  L78                 Accepts]: Start accepts. Automaton has 4469 states and 7131 transitions. Word has length 277
[2021-11-20 05:51:39,138 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-20 05:51:39,139 INFO  L470      AbstractCegarLoop]: Abstraction has 4469 states and 7131 transitions.
[2021-11-20 05:51:39,140 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 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)
[2021-11-20 05:51:39,140 INFO  L276                IsEmpty]: Start isEmpty. Operand 4469 states and 7131 transitions.
[2021-11-20 05:51:39,154 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 530
[2021-11-20 05:51:39,155 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-20 05:51:39,156 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-20 05:51:39,159 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-11-20 05:51:39,159 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-20 05:51:39,160 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-20 05:51:39,160 INFO  L85        PathProgramCache]: Analyzing trace with hash -695176404, now seen corresponding path program 1 times
[2021-11-20 05:51:39,161 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-20 05:51:39,162 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574121502]
[2021-11-20 05:51:39,162 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 05:51:39,163 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-20 05:51:39,302 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 05:51:39,603 INFO  L134       CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-20 05:51:39,603 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-20 05:51:39,604 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574121502]
[2021-11-20 05:51:39,604 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574121502] provided 0 perfect and 1 imperfect interpolant sequences
[2021-11-20 05:51:39,605 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415432102]
[2021-11-20 05:51:39,605 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 05:51:39,606 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-20 05:51:39,606 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/z3
[2021-11-20 05:51:39,611 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-20 05:51:39,618 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2021-11-20 05:51:39,802 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 05:51:39,806 INFO  L263         TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 2 conjunts are in the unsatisfiable core
[2021-11-20 05:51:39,823 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-11-20 05:51:41,000 INFO  L134       CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked.
[2021-11-20 05:51:41,001 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2021-11-20 05:51:41,001 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [415432102] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-20 05:51:41,002 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2021-11-20 05:51:41,002 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4
[2021-11-20 05:51:41,003 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259341488]
[2021-11-20 05:51:41,006 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-20 05:51:41,008 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-11-20 05:51:41,009 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-20 05:51:41,009 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-11-20 05:51:41,009 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2021-11-20 05:51:41,010 INFO  L87              Difference]: Start difference. First operand 4469 states and 7131 transitions. Second operand  has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 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)
[2021-11-20 05:51:47,206 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-20 05:51:47,206 INFO  L93              Difference]: Finished difference Result 10339 states and 18164 transitions.
[2021-11-20 05:51:47,219 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-11-20 05:51:47,219 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 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 529
[2021-11-20 05:51:47,221 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-20 05:51:47,259 INFO  L225             Difference]: With dead ends: 10339
[2021-11-20 05:51:47,259 INFO  L226             Difference]: Without dead ends: 7237
[2021-11-20 05:51:47,265 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 528 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2021-11-20 05:51:47,267 INFO  L933         BasicCegarLoop]: 1209 mSDtfsCounter, 1058 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 4577 mSolverCounterSat, 1050 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 5627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1050 IncrementalHoareTripleChecker+Valid, 4577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time
[2021-11-20 05:51:47,267 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1058 Valid, 1387 Invalid, 5627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1050 Valid, 4577 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time]
[2021-11-20 05:51:47,278 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7237 states.
[2021-11-20 05:51:47,401 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7237 to 7236.
[2021-11-20 05:51:47,416 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7236 states, 7235 states have (on average 1.520110573600553) internal successors, (10998), 7235 states have internal predecessors, (10998), 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)
[2021-11-20 05:51:47,433 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7236 states to 7236 states and 10998 transitions.
[2021-11-20 05:51:47,433 INFO  L78                 Accepts]: Start accepts. Automaton has 7236 states and 10998 transitions. Word has length 529
[2021-11-20 05:51:47,434 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-20 05:51:47,434 INFO  L470      AbstractCegarLoop]: Abstraction has 7236 states and 10998 transitions.
[2021-11-20 05:51:47,434 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 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)
[2021-11-20 05:51:47,435 INFO  L276                IsEmpty]: Start isEmpty. Operand 7236 states and 10998 transitions.
[2021-11-20 05:51:47,449 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 595
[2021-11-20 05:51:47,449 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-20 05:51:47,450 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-20 05:51:47,479 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2021-11-20 05:51:47,665 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-20 05:51:47,665 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-20 05:51:47,666 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-20 05:51:47,666 INFO  L85        PathProgramCache]: Analyzing trace with hash -362360471, now seen corresponding path program 1 times
[2021-11-20 05:51:47,666 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-20 05:51:47,667 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839250297]
[2021-11-20 05:51:47,667 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 05:51:47,667 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-20 05:51:47,807 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 05:51:48,036 INFO  L134       CoverageAnalysis]: Checked inductivity of 152 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked.
[2021-11-20 05:51:48,037 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-20 05:51:48,037 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839250297]
[2021-11-20 05:51:48,037 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839250297] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-20 05:51:48,037 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-20 05:51:48,038 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-11-20 05:51:48,038 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005345610]
[2021-11-20 05:51:48,040 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-20 05:51:48,043 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-11-20 05:51:48,043 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-20 05:51:48,044 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-11-20 05:51:48,044 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-11-20 05:51:48,045 INFO  L87              Difference]: Start difference. First operand 7236 states and 10998 transitions. Second operand  has 3 states, 3 states have (on average 174.0) internal successors, (522), 2 states have internal predecessors, (522), 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)
[2021-11-20 05:51:54,122 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-20 05:51:54,123 INFO  L93              Difference]: Finished difference Result 15842 states and 24470 transitions.
[2021-11-20 05:51:54,125 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-11-20 05:51:54,125 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 174.0) internal successors, (522), 2 states have internal predecessors, (522), 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 594
[2021-11-20 05:51:54,126 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-20 05:51:54,175 INFO  L225             Difference]: With dead ends: 15842
[2021-11-20 05:51:54,176 INFO  L226             Difference]: Without dead ends: 9973
[2021-11-20 05:51:54,185 INFO  L932         BasicCegarLoop]: 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
[2021-11-20 05:51:54,186 INFO  L933         BasicCegarLoop]: 704 mSDtfsCounter, 1396 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 3927 mSolverCounterSat, 1671 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1396 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 5598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1671 IncrementalHoareTripleChecker+Valid, 3927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time
[2021-11-20 05:51:54,186 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1396 Valid, 754 Invalid, 5598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1671 Valid, 3927 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time]
[2021-11-20 05:51:54,201 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9973 states.
[2021-11-20 05:51:54,365 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9973 to 9969.
[2021-11-20 05:51:54,386 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9969 states, 9968 states have (on average 1.390048154093098) internal successors, (13856), 9968 states have internal predecessors, (13856), 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)
[2021-11-20 05:51:54,405 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9969 states to 9969 states and 13856 transitions.
[2021-11-20 05:51:54,405 INFO  L78                 Accepts]: Start accepts. Automaton has 9969 states and 13856 transitions. Word has length 594
[2021-11-20 05:51:54,406 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-20 05:51:54,407 INFO  L470      AbstractCegarLoop]: Abstraction has 9969 states and 13856 transitions.
[2021-11-20 05:51:54,407 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 174.0) internal successors, (522), 2 states have internal predecessors, (522), 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)
[2021-11-20 05:51:54,407 INFO  L276                IsEmpty]: Start isEmpty. Operand 9969 states and 13856 transitions.
[2021-11-20 05:51:54,425 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 619
[2021-11-20 05:51:54,425 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-20 05:51:54,426 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-20 05:51:54,426 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2021-11-20 05:51:54,427 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-20 05:51:54,427 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-20 05:51:54,428 INFO  L85        PathProgramCache]: Analyzing trace with hash 2047602111, now seen corresponding path program 1 times
[2021-11-20 05:51:54,428 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-20 05:51:54,428 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446499846]
[2021-11-20 05:51:54,428 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 05:51:54,429 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-20 05:51:54,533 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 05:51:54,749 INFO  L134       CoverageAnalysis]: Checked inductivity of 176 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked.
[2021-11-20 05:51:54,749 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-20 05:51:54,749 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446499846]
[2021-11-20 05:51:54,750 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446499846] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-20 05:51:54,750 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-20 05:51:54,750 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-11-20 05:51:54,750 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109522656]
[2021-11-20 05:51:54,750 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-20 05:51:54,751 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-11-20 05:51:54,752 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-20 05:51:54,752 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-11-20 05:51:54,752 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-11-20 05:51:54,753 INFO  L87              Difference]: Start difference. First operand 9969 states and 13856 transitions. Second operand  has 3 states, 3 states have (on average 174.0) internal successors, (522), 2 states have internal predecessors, (522), 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)
[2021-11-20 05:52:01,084 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-20 05:52:01,084 INFO  L93              Difference]: Finished difference Result 26951 states and 38550 transitions.
[2021-11-20 05:52:01,085 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-11-20 05:52:01,086 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 174.0) internal successors, (522), 2 states have internal predecessors, (522), 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 618
[2021-11-20 05:52:01,087 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-20 05:52:01,130 INFO  L225             Difference]: With dead ends: 26951
[2021-11-20 05:52:01,130 INFO  L226             Difference]: Without dead ends: 18349
[2021-11-20 05:52:01,269 INFO  L932         BasicCegarLoop]: 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
[2021-11-20 05:52:01,271 INFO  L933         BasicCegarLoop]: 1330 mSDtfsCounter, 1361 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 4185 mSolverCounterSat, 1430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 1600 SdHoareTripleChecker+Invalid, 5615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1430 IncrementalHoareTripleChecker+Valid, 4185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time
[2021-11-20 05:52:01,272 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1361 Valid, 1600 Invalid, 5615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1430 Valid, 4185 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time]
[2021-11-20 05:52:01,292 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 18349 states.
[2021-11-20 05:52:01,504 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 18349 to 18334.
[2021-11-20 05:52:01,525 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 18334 states, 18333 states have (on average 1.2809687448862705) internal successors, (23484), 18333 states have internal predecessors, (23484), 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)
[2021-11-20 05:52:01,553 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18334 states to 18334 states and 23484 transitions.
[2021-11-20 05:52:01,553 INFO  L78                 Accepts]: Start accepts. Automaton has 18334 states and 23484 transitions. Word has length 618
[2021-11-20 05:52:01,554 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-20 05:52:01,554 INFO  L470      AbstractCegarLoop]: Abstraction has 18334 states and 23484 transitions.
[2021-11-20 05:52:01,555 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 174.0) internal successors, (522), 2 states have internal predecessors, (522), 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)
[2021-11-20 05:52:01,555 INFO  L276                IsEmpty]: Start isEmpty. Operand 18334 states and 23484 transitions.
[2021-11-20 05:52:01,561 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 634
[2021-11-20 05:52:01,561 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-20 05:52:01,562 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-20 05:52:01,562 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2021-11-20 05:52:01,562 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-20 05:52:01,563 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-20 05:52:01,563 INFO  L85        PathProgramCache]: Analyzing trace with hash 108929792, now seen corresponding path program 1 times
[2021-11-20 05:52:01,563 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-20 05:52:01,564 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048938146]
[2021-11-20 05:52:01,564 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 05:52:01,564 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-20 05:52:01,678 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 05:52:01,972 INFO  L134       CoverageAnalysis]: Checked inductivity of 182 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-20 05:52:01,972 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-20 05:52:01,972 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048938146]
[2021-11-20 05:52:01,973 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048938146] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-20 05:52:01,973 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-20 05:52:01,973 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2021-11-20 05:52:01,973 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265582925]
[2021-11-20 05:52:01,973 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-20 05:52:01,975 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2021-11-20 05:52:01,975 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-20 05:52:01,975 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2021-11-20 05:52:01,975 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2021-11-20 05:52:01,976 INFO  L87              Difference]: Start difference. First operand 18334 states and 23484 transitions. Second operand  has 5 states, 5 states have (on average 126.6) internal successors, (633), 4 states have internal predecessors, (633), 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)
[2021-11-20 05:52:10,368 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-20 05:52:10,369 INFO  L93              Difference]: Finished difference Result 42164 states and 53383 transitions.
[2021-11-20 05:52:10,369 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2021-11-20 05:52:10,369 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 126.6) internal successors, (633), 4 states have internal predecessors, (633), 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 633
[2021-11-20 05:52:10,370 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-20 05:52:10,424 INFO  L225             Difference]: With dead ends: 42164
[2021-11-20 05:52:10,425 INFO  L226             Difference]: Without dead ends: 25171
[2021-11-20 05:52:10,444 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2021-11-20 05:52:10,445 INFO  L933         BasicCegarLoop]: 1658 mSDtfsCounter, 2256 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 8682 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2256 SdHoareTripleChecker+Valid, 1867 SdHoareTripleChecker+Invalid, 9097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 8682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time
[2021-11-20 05:52:10,446 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [2256 Valid, 1867 Invalid, 9097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 8682 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time]
[2021-11-20 05:52:10,471 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25171 states.
[2021-11-20 05:52:10,746 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25171 to 25166.
[2021-11-20 05:52:10,775 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 25166 states, 25165 states have (on average 1.2144247963441288) internal successors, (30561), 25165 states have internal predecessors, (30561), 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)
[2021-11-20 05:52:10,810 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 25166 states to 25166 states and 30561 transitions.
[2021-11-20 05:52:10,811 INFO  L78                 Accepts]: Start accepts. Automaton has 25166 states and 30561 transitions. Word has length 633
[2021-11-20 05:52:10,812 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-20 05:52:10,812 INFO  L470      AbstractCegarLoop]: Abstraction has 25166 states and 30561 transitions.
[2021-11-20 05:52:10,812 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 126.6) internal successors, (633), 4 states have internal predecessors, (633), 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)
[2021-11-20 05:52:10,812 INFO  L276                IsEmpty]: Start isEmpty. Operand 25166 states and 30561 transitions.
[2021-11-20 05:52:10,819 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 679
[2021-11-20 05:52:10,819 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-20 05:52:10,820 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-20 05:52:10,820 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2021-11-20 05:52:10,820 INFO  L402      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-20 05:52:10,821 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-20 05:52:10,821 INFO  L85        PathProgramCache]: Analyzing trace with hash 699548916, now seen corresponding path program 1 times
[2021-11-20 05:52:10,821 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-20 05:52:10,821 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302401988]
[2021-11-20 05:52:10,822 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 05:52:10,822 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-20 05:52:10,961 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 05:52:11,255 INFO  L134       CoverageAnalysis]: Checked inductivity of 236 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked.
[2021-11-20 05:52:11,255 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-20 05:52:11,256 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302401988]
[2021-11-20 05:52:11,256 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302401988] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-20 05:52:11,256 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-20 05:52:11,256 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-11-20 05:52:11,256 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372224859]
[2021-11-20 05:52:11,259 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-20 05:52:11,263 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-11-20 05:52:11,263 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-20 05:52:11,263 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-11-20 05:52:11,264 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-11-20 05:52:11,264 INFO  L87              Difference]: Start difference. First operand 25166 states and 30561 transitions. Second operand  has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 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)
[2021-11-20 05:52:17,656 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-20 05:52:17,656 INFO  L93              Difference]: Finished difference Result 47620 states and 60784 transitions.
[2021-11-20 05:52:17,657 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-11-20 05:52:17,657 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 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 678
[2021-11-20 05:52:17,658 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-20 05:52:17,704 INFO  L225             Difference]: With dead ends: 47620
[2021-11-20 05:52:17,705 INFO  L226             Difference]: Without dead ends: 30653
[2021-11-20 05:52:17,726 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-11-20 05:52:17,727 INFO  L933         BasicCegarLoop]: 688 mSDtfsCounter, 1817 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4017 mSolverCounterSat, 2017 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1817 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 6034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2017 IncrementalHoareTripleChecker+Valid, 4017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time
[2021-11-20 05:52:17,727 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1817 Valid, 772 Invalid, 6034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2017 Valid, 4017 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time]
[2021-11-20 05:52:17,755 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30653 states.
[2021-11-20 05:52:18,070 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30653 to 29281.
[2021-11-20 05:52:18,098 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 29281 states, 29280 states have (on average 1.2540983606557377) internal successors, (36720), 29280 states have internal predecessors, (36720), 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)
[2021-11-20 05:52:18,140 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 29281 states to 29281 states and 36720 transitions.
[2021-11-20 05:52:18,140 INFO  L78                 Accepts]: Start accepts. Automaton has 29281 states and 36720 transitions. Word has length 678
[2021-11-20 05:52:18,141 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-20 05:52:18,141 INFO  L470      AbstractCegarLoop]: Abstraction has 29281 states and 36720 transitions.
[2021-11-20 05:52:18,142 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 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)
[2021-11-20 05:52:18,142 INFO  L276                IsEmpty]: Start isEmpty. Operand 29281 states and 36720 transitions.
[2021-11-20 05:52:18,153 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 894
[2021-11-20 05:52:18,153 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-20 05:52:18,154 INFO  L514         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-20 05:52:18,155 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2021-11-20 05:52:18,155 INFO  L402      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-20 05:52:18,155 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-20 05:52:18,156 INFO  L85        PathProgramCache]: Analyzing trace with hash 1913122830, now seen corresponding path program 1 times
[2021-11-20 05:52:18,156 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-20 05:52:18,156 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202472108]
[2021-11-20 05:52:18,156 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 05:52:18,157 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-20 05:52:18,295 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 05:52:18,554 INFO  L134       CoverageAnalysis]: Checked inductivity of 731 backedges. 482 proven. 0 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked.
[2021-11-20 05:52:18,555 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-20 05:52:18,555 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202472108]
[2021-11-20 05:52:18,555 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202472108] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-20 05:52:18,555 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-20 05:52:18,555 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2021-11-20 05:52:18,556 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500086423]
[2021-11-20 05:52:18,556 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-20 05:52:18,557 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2021-11-20 05:52:18,557 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-20 05:52:18,558 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-11-20 05:52:18,558 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-11-20 05:52:18,558 INFO  L87              Difference]: Start difference. First operand 29281 states and 36720 transitions. Second operand  has 4 states, 4 states have (on average 161.5) internal successors, (646), 4 states have internal predecessors, (646), 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)
[2021-11-20 05:52:30,346 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-20 05:52:30,347 INFO  L93              Difference]: Finished difference Result 103746 states and 131352 transitions.
[2021-11-20 05:52:30,352 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2021-11-20 05:52:30,353 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 161.5) internal successors, (646), 4 states have internal predecessors, (646), 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 893
[2021-11-20 05:52:30,354 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-20 05:52:30,471 INFO  L225             Difference]: With dead ends: 103746
[2021-11-20 05:52:30,472 INFO  L226             Difference]: Without dead ends: 75832
[2021-11-20 05:52:30,503 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-11-20 05:52:30,504 INFO  L933         BasicCegarLoop]: 780 mSDtfsCounter, 3322 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 9232 mSolverCounterSat, 2672 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3322 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 11904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2672 IncrementalHoareTripleChecker+Valid, 9232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time
[2021-11-20 05:52:30,504 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [3322 Valid, 1115 Invalid, 11904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2672 Valid, 9232 Invalid, 0 Unknown, 0 Unchecked, 11.2s Time]
[2021-11-20 05:52:30,582 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 75832 states.
[2021-11-20 05:52:31,275 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 75832 to 74393.
[2021-11-20 05:52:31,338 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 74393 states, 74392 states have (on average 1.1997929884933864) internal successors, (89255), 74392 states have internal predecessors, (89255), 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)
[2021-11-20 05:52:31,443 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 74393 states to 74393 states and 89255 transitions.
[2021-11-20 05:52:31,444 INFO  L78                 Accepts]: Start accepts. Automaton has 74393 states and 89255 transitions. Word has length 893
[2021-11-20 05:52:31,444 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-20 05:52:31,445 INFO  L470      AbstractCegarLoop]: Abstraction has 74393 states and 89255 transitions.
[2021-11-20 05:52:31,445 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 161.5) internal successors, (646), 4 states have internal predecessors, (646), 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)
[2021-11-20 05:52:31,445 INFO  L276                IsEmpty]: Start isEmpty. Operand 74393 states and 89255 transitions.
[2021-11-20 05:52:31,459 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 903
[2021-11-20 05:52:31,459 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-20 05:52:31,460 INFO  L514         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-20 05:52:31,460 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2021-11-20 05:52:31,460 INFO  L402      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-20 05:52:31,461 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-20 05:52:31,461 INFO  L85        PathProgramCache]: Analyzing trace with hash -1680144238, now seen corresponding path program 1 times
[2021-11-20 05:52:31,461 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-20 05:52:31,462 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80307601]
[2021-11-20 05:52:31,462 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 05:52:31,462 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-20 05:52:31,595 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 05:52:32,197 INFO  L134       CoverageAnalysis]: Checked inductivity of 751 backedges. 398 proven. 313 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked.
[2021-11-20 05:52:32,198 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-20 05:52:32,198 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80307601]
[2021-11-20 05:52:32,202 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80307601] provided 0 perfect and 1 imperfect interpolant sequences
[2021-11-20 05:52:32,202 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175928553]
[2021-11-20 05:52:32,202 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 05:52:32,203 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-20 05:52:32,203 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/z3
[2021-11-20 05:52:32,204 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-20 05:52:32,224 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2021-11-20 05:52:32,471 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 05:52:32,476 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1076 conjuncts, 2 conjunts are in the unsatisfiable core
[2021-11-20 05:52:32,488 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-11-20 05:52:34,065 INFO  L134       CoverageAnalysis]: Checked inductivity of 751 backedges. 353 proven. 0 refuted. 0 times theorem prover too weak. 398 trivial. 0 not checked.
[2021-11-20 05:52:34,065 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2021-11-20 05:52:34,065 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175928553] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-20 05:52:34,066 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2021-11-20 05:52:34,066 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8
[2021-11-20 05:52:34,066 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564010871]
[2021-11-20 05:52:34,066 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-20 05:52:34,068 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-11-20 05:52:34,068 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-20 05:52:34,068 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-11-20 05:52:34,069 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56
[2021-11-20 05:52:34,069 INFO  L87              Difference]: Start difference. First operand 74393 states and 89255 transitions. Second operand  has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 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)
[2021-11-20 05:52:40,649 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-20 05:52:40,650 INFO  L93              Difference]: Finished difference Result 152879 states and 186659 transitions.
[2021-11-20 05:52:40,650 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-11-20 05:52:40,650 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 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 902
[2021-11-20 05:52:40,651 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-20 05:52:40,778 INFO  L225             Difference]: With dead ends: 152879
[2021-11-20 05:52:40,779 INFO  L226             Difference]: Without dead ends: 92145
[2021-11-20 05:52:40,813 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 909 GetRequests, 903 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56
[2021-11-20 05:52:40,814 INFO  L933         BasicCegarLoop]: 688 mSDtfsCounter, 1663 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 4657 mSolverCounterSat, 1008 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1663 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 5665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1008 IncrementalHoareTripleChecker+Valid, 4657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time
[2021-11-20 05:52:40,815 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1663 Valid, 764 Invalid, 5665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1008 Valid, 4657 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time]
[2021-11-20 05:52:40,902 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 92145 states.
[2021-11-20 05:52:42,387 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 92145 to 90775.
[2021-11-20 05:52:42,433 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 90775 states, 90774 states have (on average 1.1880824905810035) internal successors, (107847), 90774 states have internal predecessors, (107847), 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)
[2021-11-20 05:52:42,555 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 90775 states to 90775 states and 107847 transitions.
[2021-11-20 05:52:42,556 INFO  L78                 Accepts]: Start accepts. Automaton has 90775 states and 107847 transitions. Word has length 902
[2021-11-20 05:52:42,557 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-20 05:52:42,557 INFO  L470      AbstractCegarLoop]: Abstraction has 90775 states and 107847 transitions.
[2021-11-20 05:52:42,557 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 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)
[2021-11-20 05:52:42,557 INFO  L276                IsEmpty]: Start isEmpty. Operand 90775 states and 107847 transitions.
[2021-11-20 05:52:42,571 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 903
[2021-11-20 05:52:42,571 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-20 05:52:42,572 INFO  L514         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-20 05:52:42,616 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2021-11-20 05:52:42,786 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-20 05:52:42,787 INFO  L402      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-20 05:52:42,787 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-20 05:52:42,788 INFO  L85        PathProgramCache]: Analyzing trace with hash -2109439225, now seen corresponding path program 1 times
[2021-11-20 05:52:42,788 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-20 05:52:42,788 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446070250]
[2021-11-20 05:52:42,788 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 05:52:42,788 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-20 05:52:43,216 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 05:52:43,729 INFO  L134       CoverageAnalysis]: Checked inductivity of 749 backedges. 289 proven. 366 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked.
[2021-11-20 05:52:43,729 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-20 05:52:43,729 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446070250]
[2021-11-20 05:52:43,729 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446070250] provided 0 perfect and 1 imperfect interpolant sequences
[2021-11-20 05:52:43,729 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584967113]
[2021-11-20 05:52:43,730 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 05:52:43,730 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-20 05:52:43,730 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/z3
[2021-11-20 05:52:43,731 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-20 05:52:43,734 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2021-11-20 05:52:43,994 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 05:52:43,998 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 2 conjunts are in the unsatisfiable core
[2021-11-20 05:52:44,015 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-11-20 05:52:45,494 INFO  L134       CoverageAnalysis]: Checked inductivity of 749 backedges. 353 proven. 0 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked.
[2021-11-20 05:52:45,494 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2021-11-20 05:52:45,495 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584967113] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-20 05:52:45,495 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2021-11-20 05:52:45,495 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5
[2021-11-20 05:52:45,495 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026397416]
[2021-11-20 05:52:45,496 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-20 05:52:45,497 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-11-20 05:52:45,497 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-20 05:52:45,497 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-11-20 05:52:45,497 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2021-11-20 05:52:45,498 INFO  L87              Difference]: Start difference. First operand 90775 states and 107847 transitions. Second operand  has 3 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 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)
[2021-11-20 05:52:52,680 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-20 05:52:52,680 INFO  L93              Difference]: Finished difference Result 219886 states and 262083 transitions.
[2021-11-20 05:52:52,681 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-11-20 05:52:52,681 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 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 902
[2021-11-20 05:52:52,682 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-20 05:52:52,836 INFO  L225             Difference]: With dead ends: 219886
[2021-11-20 05:52:52,836 INFO  L226             Difference]: Without dead ends: 130478
[2021-11-20 05:52:53,081 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 903 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2021-11-20 05:52:53,082 INFO  L933         BasicCegarLoop]: 1300 mSDtfsCounter, 1560 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 4222 mSolverCounterSat, 1741 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1560 SdHoareTripleChecker+Valid, 1428 SdHoareTripleChecker+Invalid, 5963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1741 IncrementalHoareTripleChecker+Valid, 4222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time
[2021-11-20 05:52:53,083 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1560 Valid, 1428 Invalid, 5963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1741 Valid, 4222 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time]
[2021-11-20 05:52:53,168 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 130478 states.
[2021-11-20 05:52:54,323 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 130478 to 129006.
[2021-11-20 05:52:54,402 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 129006 states, 129005 states have (on average 1.1510561606139298) internal successors, (148492), 129005 states have internal predecessors, (148492), 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)
[2021-11-20 05:52:54,825 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 129006 states to 129006 states and 148492 transitions.
[2021-11-20 05:52:54,825 INFO  L78                 Accepts]: Start accepts. Automaton has 129006 states and 148492 transitions. Word has length 902
[2021-11-20 05:52:54,826 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-20 05:52:54,826 INFO  L470      AbstractCegarLoop]: Abstraction has 129006 states and 148492 transitions.
[2021-11-20 05:52:54,826 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 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)
[2021-11-20 05:52:54,827 INFO  L276                IsEmpty]: Start isEmpty. Operand 129006 states and 148492 transitions.
[2021-11-20 05:52:54,871 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1019
[2021-11-20 05:52:54,886 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-20 05:52:54,888 INFO  L514         BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-20 05:52:54,930 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2021-11-20 05:52:55,110 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2021-11-20 05:52:55,111 INFO  L402      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-20 05:52:55,111 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-20 05:52:55,112 INFO  L85        PathProgramCache]: Analyzing trace with hash -883627158, now seen corresponding path program 1 times
[2021-11-20 05:52:55,112 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-20 05:52:55,112 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278096473]
[2021-11-20 05:52:55,112 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 05:52:55,112 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-20 05:52:55,490 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 05:52:55,918 INFO  L134       CoverageAnalysis]: Checked inductivity of 1211 backedges. 646 proven. 129 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked.
[2021-11-20 05:52:55,918 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-20 05:52:55,918 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278096473]
[2021-11-20 05:52:55,918 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278096473] provided 0 perfect and 1 imperfect interpolant sequences
[2021-11-20 05:52:55,918 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212265037]
[2021-11-20 05:52:55,919 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 05:52:55,919 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-20 05:52:55,919 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/z3
[2021-11-20 05:52:55,927 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-20 05:52:55,942 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2021-11-20 05:52:56,236 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 05:52:56,240 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 2 conjunts are in the unsatisfiable core
[2021-11-20 05:52:56,257 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-11-20 05:52:57,907 INFO  L134       CoverageAnalysis]: Checked inductivity of 1211 backedges. 915 proven. 0 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked.
[2021-11-20 05:52:57,907 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2021-11-20 05:52:57,907 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [212265037] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-20 05:52:57,908 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2021-11-20 05:52:57,908 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6
[2021-11-20 05:52:57,908 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045908478]
[2021-11-20 05:52:57,908 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-20 05:52:57,910 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-11-20 05:52:57,910 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-20 05:52:57,910 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-11-20 05:52:57,911 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2021-11-20 05:52:57,911 INFO  L87              Difference]: Start difference. First operand 129006 states and 148492 transitions. Second operand  has 3 states, 3 states have (on average 268.6666666666667) internal successors, (806), 3 states have internal predecessors, (806), 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)
[2021-11-20 05:53:05,622 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-20 05:53:05,622 INFO  L93              Difference]: Finished difference Result 337165 states and 393118 transitions.
[2021-11-20 05:53:05,623 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-11-20 05:53:05,623 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 268.6666666666667) internal successors, (806), 3 states have internal predecessors, (806), 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 1018
[2021-11-20 05:53:05,624 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-20 05:53:05,950 INFO  L225             Difference]: With dead ends: 337165
[2021-11-20 05:53:05,950 INFO  L226             Difference]: Without dead ends: 225912
[2021-11-20 05:53:05,997 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 1021 GetRequests, 1017 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2021-11-20 05:53:05,998 INFO  L933         BasicCegarLoop]: 687 mSDtfsCounter, 2378 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 4039 mSolverCounterSat, 1466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2378 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 5505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1466 IncrementalHoareTripleChecker+Valid, 4039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time
[2021-11-20 05:53:05,998 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [2378 Valid, 795 Invalid, 5505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1466 Valid, 4039 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time]
[2021-11-20 05:53:06,183 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 225912 states.
[2021-11-20 05:53:08,578 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 225912 to 199975.
[2021-11-20 05:53:08,675 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 199975 states, 199974 states have (on average 1.1530548971366277) internal successors, (230581), 199974 states have internal predecessors, (230581), 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)
[2021-11-20 05:53:08,968 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 199975 states to 199975 states and 230581 transitions.
[2021-11-20 05:53:08,968 INFO  L78                 Accepts]: Start accepts. Automaton has 199975 states and 230581 transitions. Word has length 1018
[2021-11-20 05:53:08,969 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-20 05:53:08,969 INFO  L470      AbstractCegarLoop]: Abstraction has 199975 states and 230581 transitions.
[2021-11-20 05:53:08,970 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 268.6666666666667) internal successors, (806), 3 states have internal predecessors, (806), 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)
[2021-11-20 05:53:08,970 INFO  L276                IsEmpty]: Start isEmpty. Operand 199975 states and 230581 transitions.
[2021-11-20 05:53:08,985 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1058
[2021-11-20 05:53:08,986 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-20 05:53:08,987 INFO  L514         BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-20 05:53:09,017 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2021-11-20 05:53:09,202 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-20 05:53:09,203 INFO  L402      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-20 05:53:09,203 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-20 05:53:09,204 INFO  L85        PathProgramCache]: Analyzing trace with hash 981094297, now seen corresponding path program 1 times
[2021-11-20 05:53:09,204 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-20 05:53:09,204 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175258309]
[2021-11-20 05:53:09,204 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 05:53:09,204 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-20 05:53:09,739 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 05:53:10,101 INFO  L134       CoverageAnalysis]: Checked inductivity of 1321 backedges. 863 proven. 66 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked.
[2021-11-20 05:53:10,101 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-20 05:53:10,101 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175258309]
[2021-11-20 05:53:10,101 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175258309] provided 0 perfect and 1 imperfect interpolant sequences
[2021-11-20 05:53:10,102 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842804626]
[2021-11-20 05:53:10,102 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 05:53:10,102 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-20 05:53:10,102 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/z3
[2021-11-20 05:53:10,107 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-20 05:53:10,124 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2021-11-20 05:53:10,408 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 05:53:10,413 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1252 conjuncts, 3 conjunts are in the unsatisfiable core
[2021-11-20 05:53:10,427 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-11-20 05:53:12,039 INFO  L134       CoverageAnalysis]: Checked inductivity of 1321 backedges. 885 proven. 0 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked.
[2021-11-20 05:53:12,039 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2021-11-20 05:53:12,040 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [842804626] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-20 05:53:12,040 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2021-11-20 05:53:12,040 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5
[2021-11-20 05:53:12,040 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429637331]
[2021-11-20 05:53:12,040 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-20 05:53:12,042 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-11-20 05:53:12,042 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-20 05:53:12,043 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-11-20 05:53:12,043 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2021-11-20 05:53:12,043 INFO  L87              Difference]: Start difference. First operand 199975 states and 230581 transitions. Second operand  has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 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)
[2021-11-20 05:53:19,979 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-20 05:53:19,979 INFO  L93              Difference]: Finished difference Result 398664 states and 459936 transitions.
[2021-11-20 05:53:19,980 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-11-20 05:53:19,980 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 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 1057
[2021-11-20 05:53:19,981 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-20 05:53:20,262 INFO  L225             Difference]: With dead ends: 398664
[2021-11-20 05:53:20,262 INFO  L226             Difference]: Without dead ends: 201421
[2021-11-20 05:53:20,344 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 1060 GetRequests, 1057 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2021-11-20 05:53:20,345 INFO  L933         BasicCegarLoop]: 1679 mSDtfsCounter, 1382 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 4914 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1382 SdHoareTripleChecker+Valid, 1841 SdHoareTripleChecker+Invalid, 5358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 4914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time
[2021-11-20 05:53:20,345 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1382 Valid, 1841 Invalid, 5358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 4914 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time]
[2021-11-20 05:53:20,513 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 201421 states.
[2021-11-20 05:53:22,729 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 201421 to 201343.
[2021-11-20 05:53:22,827 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 201343 states, 201342 states have (on average 1.138306960296411) internal successors, (229189), 201342 states have internal predecessors, (229189), 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)
[2021-11-20 05:53:23,158 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 201343 states to 201343 states and 229189 transitions.
[2021-11-20 05:53:23,158 INFO  L78                 Accepts]: Start accepts. Automaton has 201343 states and 229189 transitions. Word has length 1057
[2021-11-20 05:53:23,159 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-20 05:53:23,159 INFO  L470      AbstractCegarLoop]: Abstraction has 201343 states and 229189 transitions.
[2021-11-20 05:53:23,160 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 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)
[2021-11-20 05:53:23,160 INFO  L276                IsEmpty]: Start isEmpty. Operand 201343 states and 229189 transitions.
[2021-11-20 05:53:23,178 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1070
[2021-11-20 05:53:23,178 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-20 05:53:23,179 INFO  L514         BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-20 05:53:23,200 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2021-11-20 05:53:23,379 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_451a4e75-03a7-4bc1-a574-01b94f01ba3c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-20 05:53:23,380 INFO  L402      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-20 05:53:23,380 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-20 05:53:23,380 INFO  L85        PathProgramCache]: Analyzing trace with hash 735657204, now seen corresponding path program 1 times
[2021-11-20 05:53:23,381 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-20 05:53:23,381 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550217319]
[2021-11-20 05:53:23,381 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 05:53:23,381 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-20 05:53:23,537 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 05:53:23,872 INFO  L134       CoverageAnalysis]: Checked inductivity of 1345 backedges. 909 proven. 0 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked.
[2021-11-20 05:53:23,872 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-20 05:53:23,872 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550217319]
[2021-11-20 05:53:23,873 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550217319] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-20 05:53:23,873 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-20 05:53:23,873 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-11-20 05:53:23,873 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631540509]
[2021-11-20 05:53:23,874 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-20 05:53:23,875 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-11-20 05:53:23,875 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-20 05:53:23,876 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-11-20 05:53:23,876 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-11-20 05:53:23,876 INFO  L87              Difference]: Start difference. First operand 201343 states and 229189 transitions. Second operand  has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 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)
[2021-11-20 05:53:31,037 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-20 05:53:31,038 INFO  L93              Difference]: Finished difference Result 408144 states and 463983 transitions.
[2021-11-20 05:53:31,038 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-11-20 05:53:31,038 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 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 1069
[2021-11-20 05:53:31,039 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-20 05:53:31,313 INFO  L225             Difference]: With dead ends: 408144
[2021-11-20 05:53:31,314 INFO  L226             Difference]: Without dead ends: 204071
[2021-11-20 05:53:31,401 INFO  L932         BasicCegarLoop]: 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
[2021-11-20 05:53:31,403 INFO  L933         BasicCegarLoop]: 2867 mSDtfsCounter, 1471 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 3662 mSolverCounterSat, 1255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1471 SdHoareTripleChecker+Valid, 3046 SdHoareTripleChecker+Invalid, 4917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1255 IncrementalHoareTripleChecker+Valid, 3662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time
[2021-11-20 05:53:31,404 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1471 Valid, 3046 Invalid, 4917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1255 Valid, 3662 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time]
[2021-11-20 05:53:31,566 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 204071 states.
[2021-11-20 05:53:33,658 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 204071 to 199971.
[2021-11-20 05:53:33,757 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 199971 states, 199970 states have (on average 1.1108316247437116) internal successors, (222133), 199970 states have internal predecessors, (222133), 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)
[2021-11-20 05:53:33,965 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 199971 states to 199971 states and 222133 transitions.
[2021-11-20 05:53:33,965 INFO  L78                 Accepts]: Start accepts. Automaton has 199971 states and 222133 transitions. Word has length 1069
[2021-11-20 05:53:33,966 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-20 05:53:33,966 INFO  L470      AbstractCegarLoop]: Abstraction has 199971 states and 222133 transitions.
[2021-11-20 05:53:33,966 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 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)
[2021-11-20 05:53:33,966 INFO  L276                IsEmpty]: Start isEmpty. Operand 199971 states and 222133 transitions.
[2021-11-20 05:53:33,979 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1101
[2021-11-20 05:53:33,979 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-20 05:53:33,980 INFO  L514         BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-20 05:53:33,980 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12
[2021-11-20 05:53:33,980 INFO  L402      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-20 05:53:33,980 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-20 05:53:33,981 INFO  L85        PathProgramCache]: Analyzing trace with hash -1799774254, now seen corresponding path program 1 times
[2021-11-20 05:53:33,981 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-20 05:53:33,981 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847229697]
[2021-11-20 05:53:33,981 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 05:53:33,981 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-20 05:53:34,088 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 05:53:35,087 INFO  L134       CoverageAnalysis]: Checked inductivity of 1421 backedges. 1033 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked.
[2021-11-20 05:53:35,087 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-20 05:53:35,087 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847229697]
[2021-11-20 05:53:35,088 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847229697] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-20 05:53:35,088 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-20 05:53:35,088 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-11-20 05:53:35,088 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946900806]
[2021-11-20 05:53:35,088 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-20 05:53:35,090 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-11-20 05:53:35,090 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-20 05:53:35,091 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-11-20 05:53:35,091 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-11-20 05:53:35,091 INFO  L87              Difference]: Start difference. First operand 199971 states and 222133 transitions. Second operand  has 3 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 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)
[2021-11-20 05:53:43,247 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-20 05:53:43,247 INFO  L93              Difference]: Finished difference Result 438233 states and 491363 transitions.
[2021-11-20 05:53:43,248 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-11-20 05:53:43,248 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 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 1100
[2021-11-20 05:53:43,249 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-20 05:53:43,538 INFO  L225             Difference]: With dead ends: 438233
[2021-11-20 05:53:43,538 INFO  L226             Difference]: Without dead ends: 254650
[2021-11-20 05:53:43,603 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-11-20 05:53:43,604 INFO  L933         BasicCegarLoop]: 752 mSDtfsCounter, 1582 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 4244 mSolverCounterSat, 2078 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1582 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 6322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2078 IncrementalHoareTripleChecker+Valid, 4244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time
[2021-11-20 05:53:43,604 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1582 Valid, 804 Invalid, 6322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2078 Valid, 4244 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time]
[2021-11-20 05:53:43,790 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 254650 states.
[2021-11-20 05:53:46,223 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 254650 to 242279.
[2021-11-20 05:53:46,352 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 242279 states, 242278 states have (on average 1.1248895896449533) internal successors, (272536), 242278 states have internal predecessors, (272536), 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)
[2021-11-20 05:53:47,351 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 242279 states to 242279 states and 272536 transitions.
[2021-11-20 05:53:47,352 INFO  L78                 Accepts]: Start accepts. Automaton has 242279 states and 272536 transitions. Word has length 1100
[2021-11-20 05:53:47,352 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-20 05:53:47,352 INFO  L470      AbstractCegarLoop]: Abstraction has 242279 states and 272536 transitions.
[2021-11-20 05:53:47,353 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 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)
[2021-11-20 05:53:47,353 INFO  L276                IsEmpty]: Start isEmpty. Operand 242279 states and 272536 transitions.
[2021-11-20 05:53:47,372 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1137
[2021-11-20 05:53:47,372 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-20 05:53:47,375 INFO  L514         BasicCegarLoop]: trace histogram [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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-20 05:53:47,376 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13
[2021-11-20 05:53:47,376 INFO  L402      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-20 05:53:47,376 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-20 05:53:47,377 INFO  L85        PathProgramCache]: Analyzing trace with hash -179232052, now seen corresponding path program 1 times
[2021-11-20 05:53:47,377 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-20 05:53:47,377 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637772484]
[2021-11-20 05:53:47,377 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 05:53:47,377 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-20 05:53:47,499 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 05:53:47,820 INFO  L134       CoverageAnalysis]: Checked inductivity of 1709 backedges. 1079 proven. 0 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked.
[2021-11-20 05:53:47,821 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-20 05:53:47,821 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637772484]
[2021-11-20 05:53:47,821 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637772484] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-20 05:53:47,821 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-20 05:53:47,822 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2021-11-20 05:53:47,822 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221083915]
[2021-11-20 05:53:47,822 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-20 05:53:47,823 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2021-11-20 05:53:47,823 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-20 05:53:47,824 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-11-20 05:53:47,824 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-11-20 05:53:47,824 INFO  L87              Difference]: Start difference. First operand 242279 states and 272536 transitions. Second operand  has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 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)