./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem15_label27.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version dbf71c69
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec476c-b532-49b0-830b-a9b31e2c62cd/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec476c-b532-49b0-830b-a9b31e2c62cd/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec476c-b532-49b0-830b-a9b31e2c62cd/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec476c-b532-49b0-830b-a9b31e2c62cd/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem15_label27.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec476c-b532-49b0-830b-a9b31e2c62cd/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec476c-b532-49b0-830b-a9b31e2c62cd/bin/uautomizer-J5u9QxTXDZ --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 dc961fc62f24960fbef105f97d1eee66be6194c126d8d078cb5da412dc4c48ac
--- Real Ultimate output ---
[0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset.
This is Ultimate 0.2.2-dev-dbf71c6-m
[2022-10-17 10:52:45,791 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-10-17 10:52:45,794 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-10-17 10:52:45,839 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-10-17 10:52:45,840 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-10-17 10:52:45,844 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-10-17 10:52:45,850 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-10-17 10:52:45,854 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-10-17 10:52:45,859 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-10-17 10:52:45,864 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-10-17 10:52:45,866 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-10-17 10:52:45,869 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-10-17 10:52:45,869 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-10-17 10:52:45,872 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-10-17 10:52:45,875 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-10-17 10:52:45,877 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-10-17 10:52:45,879 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-10-17 10:52:45,880 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-10-17 10:52:45,883 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-10-17 10:52:45,892 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-10-17 10:52:45,894 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-10-17 10:52:45,896 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-10-17 10:52:45,900 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-10-17 10:52:45,901 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-10-17 10:52:45,913 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-10-17 10:52:45,913 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-10-17 10:52:45,914 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-10-17 10:52:45,916 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-10-17 10:52:45,917 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-10-17 10:52:45,918 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-10-17 10:52:45,920 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-10-17 10:52:45,922 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-10-17 10:52:45,924 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-10-17 10:52:45,926 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-10-17 10:52:45,927 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-10-17 10:52:45,927 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-10-17 10:52:45,928 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-10-17 10:52:45,928 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-10-17 10:52:45,929 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-10-17 10:52:45,930 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-10-17 10:52:45,931 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-10-17 10:52:45,932 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec476c-b532-49b0-830b-a9b31e2c62cd/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf
[2022-10-17 10:52:45,990 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-10-17 10:52:45,992 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-10-17 10:52:45,992 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-10-17 10:52:45,993 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-10-17 10:52:45,994 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-10-17 10:52:45,994 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-10-17 10:52:45,995 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-10-17 10:52:45,995 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-10-17 10:52:45,995 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-10-17 10:52:45,996 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-10-17 10:52:45,997 INFO  L138        SettingsManager]:  * sizeof long=4
[2022-10-17 10:52:45,997 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-10-17 10:52:45,998 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2022-10-17 10:52:45,998 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-10-17 10:52:45,998 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-10-17 10:52:45,998 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-10-17 10:52:45,998 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-10-17 10:52:45,999 INFO  L138        SettingsManager]:  * sizeof long double=12
[2022-10-17 10:52:45,999 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-10-17 10:52:45,999 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-10-17 10:52:45,999 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-10-17 10:52:46,000 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-10-17 10:52:46,000 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-10-17 10:52:46,000 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-10-17 10:52:46,000 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-10-17 10:52:46,001 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-10-17 10:52:46,003 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-10-17 10:52:46,016 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-10-17 10:52:46,016 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-10-17 10:52:46,016 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-10-17 10:52:46,017 INFO  L138        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2022-10-17 10:52:46,017 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-10-17 10:52:46,017 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-10-17 10:52:46,017 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_b0ec476c-b532-49b0-830b-a9b31e2c62cd/bin/uautomizer-J5u9QxTXDZ/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_b0ec476c-b532-49b0-830b-a9b31e2c62cd/bin/uautomizer-J5u9QxTXDZ
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 -> dc961fc62f24960fbef105f97d1eee66be6194c126d8d078cb5da412dc4c48ac
[2022-10-17 10:52:46,311 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-10-17 10:52:46,349 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-10-17 10:52:46,352 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-10-17 10:52:46,354 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-10-17 10:52:46,355 INFO  L275        PluginConnector]: CDTParser initialized
[2022-10-17 10:52:46,356 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec476c-b532-49b0-830b-a9b31e2c62cd/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/eca-rers2012/Problem15_label27.c
[2022-10-17 10:52:46,433 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec476c-b532-49b0-830b-a9b31e2c62cd/bin/uautomizer-J5u9QxTXDZ/data/060536b51/23b5f0effae649889682b9c13b3179ed/FLAG5354aff63
[2022-10-17 10:52:47,212 INFO  L306              CDTParser]: Found 1 translation units.
[2022-10-17 10:52:47,214 INFO  L160              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec476c-b532-49b0-830b-a9b31e2c62cd/sv-benchmarks/c/eca-rers2012/Problem15_label27.c
[2022-10-17 10:52:47,242 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec476c-b532-49b0-830b-a9b31e2c62cd/bin/uautomizer-J5u9QxTXDZ/data/060536b51/23b5f0effae649889682b9c13b3179ed/FLAG5354aff63
[2022-10-17 10:52:47,323 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec476c-b532-49b0-830b-a9b31e2c62cd/bin/uautomizer-J5u9QxTXDZ/data/060536b51/23b5f0effae649889682b9c13b3179ed
[2022-10-17 10:52:47,326 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-10-17 10:52:47,328 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-10-17 10:52:47,332 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-10-17 10:52:47,332 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-10-17 10:52:47,336 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-10-17 10:52:47,336 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:52:47" (1/1) ...
[2022-10-17 10:52:47,339 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a70710b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:47, skipping insertion in model container
[2022-10-17 10:52:47,339 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:52:47" (1/1) ...
[2022-10-17 10:52:47,347 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-10-17 10:52:47,444 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-10-17 10:52:47,799 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_b0ec476c-b532-49b0-830b-a9b31e2c62cd/sv-benchmarks/c/eca-rers2012/Problem15_label27.c[4605,4618]
[2022-10-17 10:52:48,371 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-10-17 10:52:48,381 INFO  L203         MainTranslator]: Completed pre-run
[2022-10-17 10:52:48,405 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_b0ec476c-b532-49b0-830b-a9b31e2c62cd/sv-benchmarks/c/eca-rers2012/Problem15_label27.c[4605,4618]
[2022-10-17 10:52:48,720 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-10-17 10:52:48,739 INFO  L208         MainTranslator]: Completed translation
[2022-10-17 10:52:48,739 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:48 WrapperNode
[2022-10-17 10:52:48,740 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-10-17 10:52:48,741 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-10-17 10:52:48,741 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-10-17 10:52:48,742 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-10-17 10:52:48,751 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:48" (1/1) ...
[2022-10-17 10:52:48,804 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:48" (1/1) ...
[2022-10-17 10:52:49,034 INFO  L138                Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1758
[2022-10-17 10:52:49,035 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-10-17 10:52:49,036 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-10-17 10:52:49,036 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-10-17 10:52:49,036 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-10-17 10:52:49,047 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:48" (1/1) ...
[2022-10-17 10:52:49,047 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:48" (1/1) ...
[2022-10-17 10:52:49,104 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:48" (1/1) ...
[2022-10-17 10:52:49,110 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:48" (1/1) ...
[2022-10-17 10:52:49,223 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:48" (1/1) ...
[2022-10-17 10:52:49,256 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:48" (1/1) ...
[2022-10-17 10:52:49,304 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:48" (1/1) ...
[2022-10-17 10:52:49,317 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:48" (1/1) ...
[2022-10-17 10:52:49,365 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-10-17 10:52:49,367 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-10-17 10:52:49,368 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-10-17 10:52:49,368 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-10-17 10:52:49,369 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:48" (1/1) ...
[2022-10-17 10:52:49,377 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-10-17 10:52:49,392 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec476c-b532-49b0-830b-a9b31e2c62cd/bin/uautomizer-J5u9QxTXDZ/z3
[2022-10-17 10:52:49,409 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec476c-b532-49b0-830b-a9b31e2c62cd/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-10-17 10:52:49,426 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec476c-b532-49b0-830b-a9b31e2c62cd/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-10-17 10:52:49,470 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-10-17 10:52:49,470 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2022-10-17 10:52:49,470 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-10-17 10:52:49,470 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-10-17 10:52:49,563 INFO  L235             CfgBuilder]: Building ICFG
[2022-10-17 10:52:49,567 INFO  L261             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-10-17 10:52:53,502 INFO  L276             CfgBuilder]: Performing block encoding
[2022-10-17 10:52:53,527 INFO  L295             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-10-17 10:52:53,527 INFO  L300             CfgBuilder]: Removed 1 assume(true) statements.
[2022-10-17 10:52:53,532 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:52:53 BoogieIcfgContainer
[2022-10-17 10:52:53,532 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-10-17 10:52:53,537 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-10-17 10:52:53,537 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-10-17 10:52:53,543 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-10-17 10:52:53,543 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:52:47" (1/3) ...
[2022-10-17 10:52:53,544 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dfcb86e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:52:53, skipping insertion in model container
[2022-10-17 10:52:53,544 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:48" (2/3) ...
[2022-10-17 10:52:53,545 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dfcb86e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:52:53, skipping insertion in model container
[2022-10-17 10:52:53,545 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:52:53" (3/3) ...
[2022-10-17 10:52:53,547 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem15_label27.c
[2022-10-17 10:52:53,572 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-10-17 10:52:53,572 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-10-17 10:52:53,681 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-10-17 10:52:53,693 INFO  L357      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f87a0ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2022-10-17 10:52:53,693 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-10-17 10:52:53,704 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 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)
[2022-10-17 10:52:53,715 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2022-10-17 10:52:53,716 INFO  L187           NwaCegarLoop]: Found error trace
[2022-10-17 10:52:53,717 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-10-17 10:52:53,718 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-10-17 10:52:53,726 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-10-17 10:52:53,727 INFO  L85        PathProgramCache]: Analyzing trace with hash 2088660649, now seen corresponding path program 1 times
[2022-10-17 10:52:53,737 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-10-17 10:52:53,738 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975213984]
[2022-10-17 10:52:53,738 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-17 10:52:53,739 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-10-17 10:52:53,892 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-10-17 10:52:54,218 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-10-17 10:52:54,219 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-10-17 10:52:54,219 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975213984]
[2022-10-17 10:52:54,220 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975213984] provided 1 perfect and 0 imperfect interpolant sequences
[2022-10-17 10:52:54,221 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-10-17 10:52:54,221 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-10-17 10:52:54,225 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167631014]
[2022-10-17 10:52:54,228 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-10-17 10:52:54,235 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-10-17 10:52:54,237 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-10-17 10:52:54,279 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-10-17 10:52:54,280 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-10-17 10:52:54,286 INFO  L87              Difference]: Start difference. First operand  has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 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)
[2022-10-17 10:52:57,581 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-10-17 10:52:57,581 INFO  L93              Difference]: Finished difference Result 1154 states and 2106 transitions.
[2022-10-17 10:52:57,582 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-10-17 10:52:57,583 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 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 37
[2022-10-17 10:52:57,583 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-10-17 10:52:57,602 INFO  L225             Difference]: With dead ends: 1154
[2022-10-17 10:52:57,603 INFO  L226             Difference]: Without dead ends: 665
[2022-10-17 10:52:57,622 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-10-17 10:52:57,625 INFO  L413           NwaCegarLoop]: 334 mSDtfsCounter, 284 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time
[2022-10-17 10:52:57,626 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 383 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time]
[2022-10-17 10:52:57,646 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 665 states.
[2022-10-17 10:52:57,697 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 663.
[2022-10-17 10:52:57,700 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 663 states, 662 states have (on average 1.4818731117824773) internal successors, (981), 662 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-10-17 10:52:57,703 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 981 transitions.
[2022-10-17 10:52:57,704 INFO  L78                 Accepts]: Start accepts. Automaton has 663 states and 981 transitions. Word has length 37
[2022-10-17 10:52:57,705 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-10-17 10:52:57,705 INFO  L495      AbstractCegarLoop]: Abstraction has 663 states and 981 transitions.
[2022-10-17 10:52:57,706 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 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)
[2022-10-17 10:52:57,706 INFO  L276                IsEmpty]: Start isEmpty. Operand 663 states and 981 transitions.
[2022-10-17 10:52:57,710 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 103
[2022-10-17 10:52:57,710 INFO  L187           NwaCegarLoop]: Found error trace
[2022-10-17 10:52:57,711 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2022-10-17 10:52:57,711 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-10-17 10:52:57,711 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-10-17 10:52:57,712 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-10-17 10:52:57,712 INFO  L85        PathProgramCache]: Analyzing trace with hash 1560092623, now seen corresponding path program 1 times
[2022-10-17 10:52:57,712 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-10-17 10:52:57,713 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535726088]
[2022-10-17 10:52:57,713 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-17 10:52:57,713 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-10-17 10:52:57,770 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-10-17 10:52:58,245 INFO  L134       CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-10-17 10:52:58,246 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-10-17 10:52:58,246 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535726088]
[2022-10-17 10:52:58,246 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535726088] provided 1 perfect and 0 imperfect interpolant sequences
[2022-10-17 10:52:58,246 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-10-17 10:52:58,247 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-10-17 10:52:58,247 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148825345]
[2022-10-17 10:52:58,247 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-10-17 10:52:58,248 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-10-17 10:52:58,249 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-10-17 10:52:58,249 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-10-17 10:52:58,249 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-10-17 10:52:58,250 INFO  L87              Difference]: Start difference. First operand 663 states and 981 transitions. Second operand  has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 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)
[2022-10-17 10:53:00,824 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-10-17 10:53:00,825 INFO  L93              Difference]: Finished difference Result 1624 states and 2315 transitions.
[2022-10-17 10:53:00,831 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-10-17 10:53:00,832 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 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 102
[2022-10-17 10:53:00,833 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-10-17 10:53:00,840 INFO  L225             Difference]: With dead ends: 1624
[2022-10-17 10:53:00,841 INFO  L226             Difference]: Without dead ends: 963
[2022-10-17 10:53:00,852 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-10-17 10:53:00,855 INFO  L413           NwaCegarLoop]: 299 mSDtfsCounter, 237 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time
[2022-10-17 10:53:00,856 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 337 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time]
[2022-10-17 10:53:00,861 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 963 states.
[2022-10-17 10:53:00,891 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963.
[2022-10-17 10:53:00,894 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 963 states, 962 states have (on average 1.362785862785863) internal successors, (1311), 962 states have internal predecessors, (1311), 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)
[2022-10-17 10:53:00,898 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1311 transitions.
[2022-10-17 10:53:00,899 INFO  L78                 Accepts]: Start accepts. Automaton has 963 states and 1311 transitions. Word has length 102
[2022-10-17 10:53:00,899 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-10-17 10:53:00,899 INFO  L495      AbstractCegarLoop]: Abstraction has 963 states and 1311 transitions.
[2022-10-17 10:53:00,900 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 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)
[2022-10-17 10:53:00,900 INFO  L276                IsEmpty]: Start isEmpty. Operand 963 states and 1311 transitions.
[2022-10-17 10:53:00,902 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 108
[2022-10-17 10:53:00,903 INFO  L187           NwaCegarLoop]: Found error trace
[2022-10-17 10:53:00,903 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2022-10-17 10:53:00,903 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-10-17 10:53:00,904 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-10-17 10:53:00,904 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-10-17 10:53:00,904 INFO  L85        PathProgramCache]: Analyzing trace with hash -1622553922, now seen corresponding path program 1 times
[2022-10-17 10:53:00,905 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-10-17 10:53:00,905 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625384502]
[2022-10-17 10:53:00,905 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-17 10:53:00,905 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-10-17 10:53:00,947 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-10-17 10:53:01,264 INFO  L134       CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-10-17 10:53:01,265 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-10-17 10:53:01,265 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625384502]
[2022-10-17 10:53:01,266 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625384502] provided 1 perfect and 0 imperfect interpolant sequences
[2022-10-17 10:53:01,268 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-10-17 10:53:01,268 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-10-17 10:53:01,268 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007080512]
[2022-10-17 10:53:01,268 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-10-17 10:53:01,269 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-10-17 10:53:01,269 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-10-17 10:53:01,270 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-10-17 10:53:01,271 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2022-10-17 10:53:01,272 INFO  L87              Difference]: Start difference. First operand 963 states and 1311 transitions. Second operand  has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 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)
[2022-10-17 10:53:04,760 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-10-17 10:53:04,761 INFO  L93              Difference]: Finished difference Result 2244 states and 3201 transitions.
[2022-10-17 10:53:04,764 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-10-17 10:53:04,764 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 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 107
[2022-10-17 10:53:04,767 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-10-17 10:53:04,778 INFO  L225             Difference]: With dead ends: 2244
[2022-10-17 10:53:04,778 INFO  L226             Difference]: Without dead ends: 1582
[2022-10-17 10:53:04,782 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2022-10-17 10:53:04,783 INFO  L413           NwaCegarLoop]: 268 mSDtfsCounter, 361 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 1664 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 2146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 1664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time
[2022-10-17 10:53:04,784 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 366 Invalid, 2146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 1664 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time]
[2022-10-17 10:53:04,788 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1582 states.
[2022-10-17 10:53:04,818 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1266.
[2022-10-17 10:53:04,821 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1266 states, 1265 states have (on average 1.3043478260869565) internal successors, (1650), 1265 states have internal predecessors, (1650), 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)
[2022-10-17 10:53:04,828 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1650 transitions.
[2022-10-17 10:53:04,828 INFO  L78                 Accepts]: Start accepts. Automaton has 1266 states and 1650 transitions. Word has length 107
[2022-10-17 10:53:04,829 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-10-17 10:53:04,829 INFO  L495      AbstractCegarLoop]: Abstraction has 1266 states and 1650 transitions.
[2022-10-17 10:53:04,829 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 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)
[2022-10-17 10:53:04,830 INFO  L276                IsEmpty]: Start isEmpty. Operand 1266 states and 1650 transitions.
[2022-10-17 10:53:04,842 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 204
[2022-10-17 10:53:04,843 INFO  L187           NwaCegarLoop]: Found error trace
[2022-10-17 10:53:04,843 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-10-17 10:53:04,844 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2022-10-17 10:53:04,844 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-10-17 10:53:04,845 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-10-17 10:53:04,845 INFO  L85        PathProgramCache]: Analyzing trace with hash 416877114, now seen corresponding path program 1 times
[2022-10-17 10:53:04,845 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-10-17 10:53:04,846 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935763049]
[2022-10-17 10:53:04,846 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-17 10:53:04,846 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-10-17 10:53:04,913 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-10-17 10:53:05,256 INFO  L134       CoverageAnalysis]: Checked inductivity of 143 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-10-17 10:53:05,256 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-10-17 10:53:05,256 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935763049]
[2022-10-17 10:53:05,257 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935763049] provided 1 perfect and 0 imperfect interpolant sequences
[2022-10-17 10:53:05,257 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-10-17 10:53:05,257 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-10-17 10:53:05,258 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998763932]
[2022-10-17 10:53:05,258 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-10-17 10:53:05,260 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-10-17 10:53:05,261 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-10-17 10:53:05,261 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-10-17 10:53:05,261 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-10-17 10:53:05,262 INFO  L87              Difference]: Start difference. First operand 1266 states and 1650 transitions. Second operand  has 4 states, 4 states have (on average 50.75) internal successors, (203), 3 states have internal predecessors, (203), 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)
[2022-10-17 10:53:09,875 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-10-17 10:53:09,876 INFO  L93              Difference]: Finished difference Result 4670 states and 6170 transitions.
[2022-10-17 10:53:09,876 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-10-17 10:53:09,876 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 50.75) internal successors, (203), 3 states have internal predecessors, (203), 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 203
[2022-10-17 10:53:09,877 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-10-17 10:53:09,897 INFO  L225             Difference]: With dead ends: 4670
[2022-10-17 10:53:09,897 INFO  L226             Difference]: Without dead ends: 3406
[2022-10-17 10:53:09,900 INFO  L412           NwaCegarLoop]: 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
[2022-10-17 10:53:09,901 INFO  L413           NwaCegarLoop]: 292 mSDtfsCounter, 491 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1956 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 2240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 1956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time
[2022-10-17 10:53:09,902 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 347 Invalid, 2240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 1956 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time]
[2022-10-17 10:53:09,908 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3406 states.
[2022-10-17 10:53:09,979 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3406 to 3381.
[2022-10-17 10:53:09,987 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3381 states, 3380 states have (on average 1.23698224852071) internal successors, (4181), 3380 states have internal predecessors, (4181), 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)
[2022-10-17 10:53:09,997 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3381 states to 3381 states and 4181 transitions.
[2022-10-17 10:53:09,998 INFO  L78                 Accepts]: Start accepts. Automaton has 3381 states and 4181 transitions. Word has length 203
[2022-10-17 10:53:09,999 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-10-17 10:53:09,999 INFO  L495      AbstractCegarLoop]: Abstraction has 3381 states and 4181 transitions.
[2022-10-17 10:53:09,999 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 50.75) internal successors, (203), 3 states have internal predecessors, (203), 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)
[2022-10-17 10:53:10,000 INFO  L276                IsEmpty]: Start isEmpty. Operand 3381 states and 4181 transitions.
[2022-10-17 10:53:10,003 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 208
[2022-10-17 10:53:10,004 INFO  L187           NwaCegarLoop]: Found error trace
[2022-10-17 10:53:10,004 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-10-17 10:53:10,005 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2022-10-17 10:53:10,005 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-10-17 10:53:10,005 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-10-17 10:53:10,006 INFO  L85        PathProgramCache]: Analyzing trace with hash 1982643012, now seen corresponding path program 1 times
[2022-10-17 10:53:10,006 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-10-17 10:53:10,006 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80874723]
[2022-10-17 10:53:10,007 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-17 10:53:10,007 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-10-17 10:53:10,068 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-10-17 10:53:10,312 INFO  L134       CoverageAnalysis]: Checked inductivity of 147 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked.
[2022-10-17 10:53:10,312 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-10-17 10:53:10,312 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80874723]
[2022-10-17 10:53:10,313 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80874723] provided 1 perfect and 0 imperfect interpolant sequences
[2022-10-17 10:53:10,313 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-10-17 10:53:10,313 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-10-17 10:53:10,315 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70487349]
[2022-10-17 10:53:10,315 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-10-17 10:53:10,317 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-10-17 10:53:10,317 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-10-17 10:53:10,318 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-10-17 10:53:10,318 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-10-17 10:53:10,319 INFO  L87              Difference]: Start difference. First operand 3381 states and 4181 transitions. Second operand  has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 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)
[2022-10-17 10:53:12,135 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-10-17 10:53:12,136 INFO  L93              Difference]: Finished difference Result 8563 states and 10756 transitions.
[2022-10-17 10:53:12,136 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-10-17 10:53:12,136 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 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 207
[2022-10-17 10:53:12,137 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-10-17 10:53:12,166 INFO  L225             Difference]: With dead ends: 8563
[2022-10-17 10:53:12,167 INFO  L226             Difference]: Without dead ends: 5483
[2022-10-17 10:53:12,171 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-10-17 10:53:12,172 INFO  L413           NwaCegarLoop]: 272 mSDtfsCounter, 257 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time
[2022-10-17 10:53:12,173 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 339 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time]
[2022-10-17 10:53:12,180 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5483 states.
[2022-10-17 10:53:12,283 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5483 to 5478.
[2022-10-17 10:53:12,296 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5478 states, 5477 states have (on average 1.168888077414643) internal successors, (6402), 5477 states have internal predecessors, (6402), 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)
[2022-10-17 10:53:12,309 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 6402 transitions.
[2022-10-17 10:53:12,310 INFO  L78                 Accepts]: Start accepts. Automaton has 5478 states and 6402 transitions. Word has length 207
[2022-10-17 10:53:12,310 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-10-17 10:53:12,311 INFO  L495      AbstractCegarLoop]: Abstraction has 5478 states and 6402 transitions.
[2022-10-17 10:53:12,311 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 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)
[2022-10-17 10:53:12,312 INFO  L276                IsEmpty]: Start isEmpty. Operand 5478 states and 6402 transitions.
[2022-10-17 10:53:12,318 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 310
[2022-10-17 10:53:12,318 INFO  L187           NwaCegarLoop]: Found error trace
[2022-10-17 10:53:12,319 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-10-17 10:53:12,319 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2022-10-17 10:53:12,320 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-10-17 10:53:12,320 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-10-17 10:53:12,321 INFO  L85        PathProgramCache]: Analyzing trace with hash -611803236, now seen corresponding path program 1 times
[2022-10-17 10:53:12,321 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-10-17 10:53:12,321 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819884608]
[2022-10-17 10:53:12,322 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-17 10:53:12,322 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-10-17 10:53:12,408 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-10-17 10:53:13,181 INFO  L134       CoverageAnalysis]: Checked inductivity of 144 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked.
[2022-10-17 10:53:13,182 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-10-17 10:53:13,182 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819884608]
[2022-10-17 10:53:13,182 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819884608] provided 1 perfect and 0 imperfect interpolant sequences
[2022-10-17 10:53:13,183 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-10-17 10:53:13,183 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-10-17 10:53:13,183 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726981570]
[2022-10-17 10:53:13,183 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-10-17 10:53:13,184 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-10-17 10:53:13,184 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-10-17 10:53:13,185 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-10-17 10:53:13,185 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-10-17 10:53:13,186 INFO  L87              Difference]: Start difference. First operand 5478 states and 6402 transitions. Second operand  has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 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)
[2022-10-17 10:53:15,432 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-10-17 10:53:15,432 INFO  L93              Difference]: Finished difference Result 10655 states and 12491 transitions.
[2022-10-17 10:53:15,437 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-10-17 10:53:15,438 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 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 309
[2022-10-17 10:53:15,438 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-10-17 10:53:15,467 INFO  L225             Difference]: With dead ends: 10655
[2022-10-17 10:53:15,467 INFO  L226             Difference]: Without dead ends: 5478
[2022-10-17 10:53:15,474 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-10-17 10:53:15,476 INFO  L413           NwaCegarLoop]: 324 mSDtfsCounter, 105 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time
[2022-10-17 10:53:15,476 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 359 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time]
[2022-10-17 10:53:15,484 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5478 states.
[2022-10-17 10:53:15,656 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5478 to 5478.
[2022-10-17 10:53:15,669 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5478 states, 5477 states have (on average 1.1677925871827644) internal successors, (6396), 5477 states have internal predecessors, (6396), 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)
[2022-10-17 10:53:15,686 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 6396 transitions.
[2022-10-17 10:53:15,687 INFO  L78                 Accepts]: Start accepts. Automaton has 5478 states and 6396 transitions. Word has length 309
[2022-10-17 10:53:15,687 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-10-17 10:53:15,688 INFO  L495      AbstractCegarLoop]: Abstraction has 5478 states and 6396 transitions.
[2022-10-17 10:53:15,688 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 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)
[2022-10-17 10:53:15,689 INFO  L276                IsEmpty]: Start isEmpty. Operand 5478 states and 6396 transitions.
[2022-10-17 10:53:15,696 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 325
[2022-10-17 10:53:15,696 INFO  L187           NwaCegarLoop]: Found error trace
[2022-10-17 10:53:15,697 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-10-17 10:53:15,698 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2022-10-17 10:53:15,698 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-10-17 10:53:15,698 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-10-17 10:53:15,699 INFO  L85        PathProgramCache]: Analyzing trace with hash 17846925, now seen corresponding path program 1 times
[2022-10-17 10:53:15,699 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-10-17 10:53:15,699 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277675936]
[2022-10-17 10:53:15,700 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-17 10:53:15,700 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-10-17 10:53:15,842 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-10-17 10:53:16,176 INFO  L134       CoverageAnalysis]: Checked inductivity of 159 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked.
[2022-10-17 10:53:16,176 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-10-17 10:53:16,176 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277675936]
[2022-10-17 10:53:16,176 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277675936] provided 1 perfect and 0 imperfect interpolant sequences
[2022-10-17 10:53:16,177 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-10-17 10:53:16,177 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-10-17 10:53:16,177 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165561032]
[2022-10-17 10:53:16,177 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-10-17 10:53:16,178 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-10-17 10:53:16,178 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-10-17 10:53:16,179 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-10-17 10:53:16,179 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-10-17 10:53:16,179 INFO  L87              Difference]: Start difference. First operand 5478 states and 6396 transitions. Second operand  has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 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)