./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label58.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version e04fb08f
Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label58.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8 --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 18d91842aba67b15ef1ce5fcca24e96a1a752cfb2bfcabae8ea7bcde2585be09
--- 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-e04fb08
[2022-11-16 11:57:56,216 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-11-16 11:57:56,218 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-11-16 11:57:56,247 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-11-16 11:57:56,251 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-11-16 11:57:56,256 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-11-16 11:57:56,259 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-11-16 11:57:56,264 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-11-16 11:57:56,266 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-11-16 11:57:56,273 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-11-16 11:57:56,275 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-11-16 11:57:56,277 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-11-16 11:57:56,278 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-11-16 11:57:56,280 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-11-16 11:57:56,282 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-11-16 11:57:56,284 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-11-16 11:57:56,286 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-11-16 11:57:56,287 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-11-16 11:57:56,289 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-11-16 11:57:56,295 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-11-16 11:57:56,300 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-11-16 11:57:56,302 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-11-16 11:57:56,303 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-11-16 11:57:56,304 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-11-16 11:57:56,307 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-11-16 11:57:56,307 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-11-16 11:57:56,308 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-11-16 11:57:56,309 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-11-16 11:57:56,309 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-11-16 11:57:56,310 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-11-16 11:57:56,310 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-11-16 11:57:56,311 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-11-16 11:57:56,312 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-11-16 11:57:56,312 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-11-16 11:57:56,313 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-11-16 11:57:56,314 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-11-16 11:57:56,318 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-11-16 11:57:56,319 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-11-16 11:57:56,319 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-11-16 11:57:56,320 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-11-16 11:57:56,321 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-11-16 11:57:56,322 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf
[2022-11-16 11:57:56,354 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-11-16 11:57:56,355 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-11-16 11:57:56,355 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-11-16 11:57:56,355 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-11-16 11:57:56,356 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-11-16 11:57:56,356 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-11-16 11:57:56,357 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-11-16 11:57:56,357 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-11-16 11:57:56,357 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-11-16 11:57:56,357 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-11-16 11:57:56,358 INFO  L138        SettingsManager]:  * sizeof long=4
[2022-11-16 11:57:56,358 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-11-16 11:57:56,358 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2022-11-16 11:57:56,358 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-11-16 11:57:56,358 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-11-16 11:57:56,359 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-11-16 11:57:56,359 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-11-16 11:57:56,359 INFO  L138        SettingsManager]:  * sizeof long double=12
[2022-11-16 11:57:56,359 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-11-16 11:57:56,359 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-11-16 11:57:56,359 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-11-16 11:57:56,360 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-11-16 11:57:56,360 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-11-16 11:57:56,360 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-11-16 11:57:56,360 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-11-16 11:57:56,360 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-11-16 11:57:56,361 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-11-16 11:57:56,361 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-11-16 11:57:56,361 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-11-16 11:57:56,361 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-11-16 11:57:56,361 INFO  L138        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2022-11-16 11:57:56,361 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-11-16 11:57:56,362 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-11-16 11:57:56,362 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_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8/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_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8
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 -> 18d91842aba67b15ef1ce5fcca24e96a1a752cfb2bfcabae8ea7bcde2585be09
[2022-11-16 11:57:56,702 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-11-16 11:57:56,728 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-11-16 11:57:56,731 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-11-16 11:57:56,733 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-11-16 11:57:56,734 INFO  L275        PluginConnector]: CDTParser initialized
[2022-11-16 11:57:56,735 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/eca-rers2012/Problem13_label58.c
[2022-11-16 11:57:56,808 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8/data/75e92a8a9/4bb6423caa884bd4bc2d6937970616e0/FLAG479796c2e
[2022-11-16 11:57:57,703 INFO  L306              CDTParser]: Found 1 translation units.
[2022-11-16 11:57:57,704 INFO  L160              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d32e815-46b4-4c41-af03-74308b906abf/sv-benchmarks/c/eca-rers2012/Problem13_label58.c
[2022-11-16 11:57:57,744 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8/data/75e92a8a9/4bb6423caa884bd4bc2d6937970616e0/FLAG479796c2e
[2022-11-16 11:57:58,204 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8/data/75e92a8a9/4bb6423caa884bd4bc2d6937970616e0
[2022-11-16 11:57:58,207 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-11-16 11:57:58,209 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-11-16 11:57:58,211 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-11-16 11:57:58,211 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-11-16 11:57:58,215 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-11-16 11:57:58,215 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:57:58" (1/1) ...
[2022-11-16 11:57:58,216 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c434e9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:57:58, skipping insertion in model container
[2022-11-16 11:57:58,216 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:57:58" (1/1) ...
[2022-11-16 11:57:58,224 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-11-16 11:57:58,392 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-11-16 11:57:58,682 WARN  L229   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_1d32e815-46b4-4c41-af03-74308b906abf/sv-benchmarks/c/eca-rers2012/Problem13_label58.c[2071,2084]
[2022-11-16 11:57:59,947 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-11-16 11:57:59,961 INFO  L203         MainTranslator]: Completed pre-run
[2022-11-16 11:57:59,993 WARN  L229   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_1d32e815-46b4-4c41-af03-74308b906abf/sv-benchmarks/c/eca-rers2012/Problem13_label58.c[2071,2084]
[2022-11-16 11:58:00,754 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-11-16 11:58:00,779 INFO  L208         MainTranslator]: Completed translation
[2022-11-16 11:58:00,779 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:58:00 WrapperNode
[2022-11-16 11:58:00,779 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-11-16 11:58:00,781 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-11-16 11:58:00,781 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-11-16 11:58:00,781 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-11-16 11:58:00,789 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:58:00" (1/1) ...
[2022-11-16 11:58:00,871 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:58:00" (1/1) ...
[2022-11-16 11:58:01,472 INFO  L138                Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583
[2022-11-16 11:58:01,473 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-11-16 11:58:01,474 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-11-16 11:58:01,474 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-11-16 11:58:01,474 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-11-16 11:58:01,483 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:58:00" (1/1) ...
[2022-11-16 11:58:01,484 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:58:00" (1/1) ...
[2022-11-16 11:58:01,713 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:58:00" (1/1) ...
[2022-11-16 11:58:01,721 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:58:00" (1/1) ...
[2022-11-16 11:58:01,997 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:58:00" (1/1) ...
[2022-11-16 11:58:02,090 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:58:00" (1/1) ...
[2022-11-16 11:58:02,183 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:58:00" (1/1) ...
[2022-11-16 11:58:02,196 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:58:00" (1/1) ...
[2022-11-16 11:58:02,399 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-11-16 11:58:02,415 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-11-16 11:58:02,415 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-11-16 11:58:02,415 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-11-16 11:58:02,417 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:58:00" (1/1) ...
[2022-11-16 11:58:02,424 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-11-16 11:58:02,450 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8/z3
[2022-11-16 11:58:02,477 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-11-16 11:58:02,506 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-11-16 11:58:02,538 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-11-16 11:58:02,538 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2022-11-16 11:58:02,538 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-11-16 11:58:02,539 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-11-16 11:58:02,645 INFO  L235             CfgBuilder]: Building ICFG
[2022-11-16 11:58:02,647 INFO  L261             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-11-16 11:58:09,457 INFO  L276             CfgBuilder]: Performing block encoding
[2022-11-16 11:58:09,480 INFO  L295             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-11-16 11:58:09,480 INFO  L300             CfgBuilder]: Removed 1 assume(true) statements.
[2022-11-16 11:58:09,484 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:58:09 BoogieIcfgContainer
[2022-11-16 11:58:09,484 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-11-16 11:58:09,492 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-11-16 11:58:09,492 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-11-16 11:58:09,497 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-11-16 11:58:09,498 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:57:58" (1/3) ...
[2022-11-16 11:58:09,499 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1cd89e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:58:09, skipping insertion in model container
[2022-11-16 11:58:09,500 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:58:00" (2/3) ...
[2022-11-16 11:58:09,500 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1cd89e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:58:09, skipping insertion in model container
[2022-11-16 11:58:09,500 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:58:09" (3/3) ...
[2022-11-16 11:58:09,502 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem13_label58.c
[2022-11-16 11:58:09,520 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-11-16 11:58:09,521 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-11-16 11:58:09,632 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-11-16 11:58:09,639 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;@58af94bb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2022-11-16 11:58:09,639 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-11-16 11:58:09,651 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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)
[2022-11-16 11:58:09,657 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2022-11-16 11:58:09,658 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-16 11:58:09,658 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-16 11:58:09,659 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-16 11:58:09,667 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-16 11:58:09,667 INFO  L85        PathProgramCache]: Analyzing trace with hash -569068670, now seen corresponding path program 1 times
[2022-11-16 11:58:09,677 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-16 11:58:09,677 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662139639]
[2022-11-16 11:58:09,678 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-16 11:58:09,678 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-16 11:58:09,803 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-16 11:58:09,974 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-16 11:58:09,975 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-16 11:58:09,975 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662139639]
[2022-11-16 11:58:09,976 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662139639] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-16 11:58:09,977 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-16 11:58:09,977 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-11-16 11:58:09,978 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781082372]
[2022-11-16 11:58:09,979 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-16 11:58:09,983 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-16 11:58:09,984 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-16 11:58:10,014 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-16 11:58:10,015 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-16 11:58:10,021 INFO  L87              Difference]: Start difference. First operand  has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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)
[2022-11-16 11:58:16,478 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-16 11:58:16,478 INFO  L93              Difference]: Finished difference Result 3121 states and 5804 transitions.
[2022-11-16 11:58:16,479 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-16 11:58:16,480 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12
[2022-11-16 11:58:16,481 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-16 11:58:16,508 INFO  L225             Difference]: With dead ends: 3121
[2022-11-16 11:58:16,508 INFO  L226             Difference]: Without dead ends: 1944
[2022-11-16 11:58:16,515 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
[2022-11-16 11:58:16,518 INFO  L413           NwaCegarLoop]: 438 mSDtfsCounter, 977 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3124 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 3701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 3124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time
[2022-11-16 11:58:16,519 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [977 Valid, 575 Invalid, 3701 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [577 Valid, 3124 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time]
[2022-11-16 11:58:16,541 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1944 states.
[2022-11-16 11:58:16,657 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1873.
[2022-11-16 11:58:16,664 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1873 states, 1872 states have (on average 1.7393162393162394) internal successors, (3256), 1872 states have internal predecessors, (3256), 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)
[2022-11-16 11:58:16,671 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3256 transitions.
[2022-11-16 11:58:16,673 INFO  L78                 Accepts]: Start accepts. Automaton has 1873 states and 3256 transitions. Word has length 12
[2022-11-16 11:58:16,673 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-16 11:58:16,674 INFO  L495      AbstractCegarLoop]: Abstraction has 1873 states and 3256 transitions.
[2022-11-16 11:58:16,675 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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)
[2022-11-16 11:58:16,675 INFO  L276                IsEmpty]: Start isEmpty. Operand 1873 states and 3256 transitions.
[2022-11-16 11:58:16,677 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 78
[2022-11-16 11:58:16,677 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-16 11:58:16,678 INFO  L195           NwaCegarLoop]: trace histogram [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]
[2022-11-16 11:58:16,678 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-11-16 11:58:16,678 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-16 11:58:16,679 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-16 11:58:16,679 INFO  L85        PathProgramCache]: Analyzing trace with hash -873389910, now seen corresponding path program 1 times
[2022-11-16 11:58:16,679 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-16 11:58:16,680 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534165881]
[2022-11-16 11:58:16,680 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-16 11:58:16,681 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-16 11:58:16,757 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-16 11:58:16,909 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-16 11:58:16,909 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-16 11:58:16,909 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534165881]
[2022-11-16 11:58:16,910 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534165881] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-16 11:58:16,910 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-16 11:58:16,910 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-11-16 11:58:16,910 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744230391]
[2022-11-16 11:58:16,911 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-16 11:58:16,912 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-16 11:58:16,912 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-16 11:58:16,913 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-16 11:58:16,913 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-16 11:58:16,913 INFO  L87              Difference]: Start difference. First operand 1873 states and 3256 transitions. Second operand  has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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)
[2022-11-16 11:58:21,916 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-16 11:58:21,916 INFO  L93              Difference]: Finished difference Result 5351 states and 9369 transitions.
[2022-11-16 11:58:21,918 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-16 11:58:21,919 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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 77
[2022-11-16 11:58:21,920 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-16 11:58:21,934 INFO  L225             Difference]: With dead ends: 5351
[2022-11-16 11:58:21,935 INFO  L226             Difference]: Without dead ends: 3480
[2022-11-16 11:58:21,943 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
[2022-11-16 11:58:21,947 INFO  L413           NwaCegarLoop]: 926 mSDtfsCounter, 884 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 878 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 3216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 878 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time
[2022-11-16 11:58:21,948 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [884 Valid, 1079 Invalid, 3216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [878 Valid, 2338 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time]
[2022-11-16 11:58:21,955 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3480 states.
[2022-11-16 11:58:22,013 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3479.
[2022-11-16 11:58:22,019 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3479 states, 3478 states have (on average 1.518688901667625) internal successors, (5282), 3478 states have internal predecessors, (5282), 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)
[2022-11-16 11:58:22,028 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3479 states to 3479 states and 5282 transitions.
[2022-11-16 11:58:22,029 INFO  L78                 Accepts]: Start accepts. Automaton has 3479 states and 5282 transitions. Word has length 77
[2022-11-16 11:58:22,031 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-16 11:58:22,031 INFO  L495      AbstractCegarLoop]: Abstraction has 3479 states and 5282 transitions.
[2022-11-16 11:58:22,032 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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)
[2022-11-16 11:58:22,032 INFO  L276                IsEmpty]: Start isEmpty. Operand 3479 states and 5282 transitions.
[2022-11-16 11:58:22,033 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 80
[2022-11-16 11:58:22,034 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-16 11:58:22,034 INFO  L195           NwaCegarLoop]: trace histogram [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]
[2022-11-16 11:58:22,034 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-11-16 11:58:22,035 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-16 11:58:22,035 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-16 11:58:22,035 INFO  L85        PathProgramCache]: Analyzing trace with hash 1023071909, now seen corresponding path program 1 times
[2022-11-16 11:58:22,036 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-16 11:58:22,036 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029513905]
[2022-11-16 11:58:22,036 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-16 11:58:22,036 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-16 11:58:22,063 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-16 11:58:22,176 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-16 11:58:22,176 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-16 11:58:22,177 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029513905]
[2022-11-16 11:58:22,177 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029513905] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-16 11:58:22,177 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-16 11:58:22,177 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-11-16 11:58:22,177 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349179422]
[2022-11-16 11:58:22,178 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-16 11:58:22,178 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-16 11:58:22,178 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-16 11:58:22,179 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-16 11:58:22,179 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-16 11:58:22,179 INFO  L87              Difference]: Start difference. First operand 3479 states and 5282 transitions. Second operand  has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 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)
[2022-11-16 11:58:27,027 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-16 11:58:27,027 INFO  L93              Difference]: Finished difference Result 10144 states and 15439 transitions.
[2022-11-16 11:58:27,028 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-16 11:58:27,028 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 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 79
[2022-11-16 11:58:27,029 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-16 11:58:27,052 INFO  L225             Difference]: With dead ends: 10144
[2022-11-16 11:58:27,052 INFO  L226             Difference]: Without dead ends: 6667
[2022-11-16 11:58:27,058 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
[2022-11-16 11:58:27,059 INFO  L413           NwaCegarLoop]: 745 mSDtfsCounter, 977 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 3325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time
[2022-11-16 11:58:27,059 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [977 Valid, 879 Invalid, 3325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 2554 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time]
[2022-11-16 11:58:27,068 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6667 states.
[2022-11-16 11:58:27,249 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6667 to 6657.
[2022-11-16 11:58:27,260 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6657 states, 6656 states have (on average 1.3728966346153846) internal successors, (9138), 6656 states have internal predecessors, (9138), 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)
[2022-11-16 11:58:27,280 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6657 states to 6657 states and 9138 transitions.
[2022-11-16 11:58:27,280 INFO  L78                 Accepts]: Start accepts. Automaton has 6657 states and 9138 transitions. Word has length 79
[2022-11-16 11:58:27,281 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-16 11:58:27,281 INFO  L495      AbstractCegarLoop]: Abstraction has 6657 states and 9138 transitions.
[2022-11-16 11:58:27,281 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 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)
[2022-11-16 11:58:27,281 INFO  L276                IsEmpty]: Start isEmpty. Operand 6657 states and 9138 transitions.
[2022-11-16 11:58:27,283 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 86
[2022-11-16 11:58:27,283 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-16 11:58:27,283 INFO  L195           NwaCegarLoop]: trace histogram [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]
[2022-11-16 11:58:27,284 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2022-11-16 11:58:27,284 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-16 11:58:27,287 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-16 11:58:27,288 INFO  L85        PathProgramCache]: Analyzing trace with hash -1614025002, now seen corresponding path program 1 times
[2022-11-16 11:58:27,288 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-16 11:58:27,288 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043641319]
[2022-11-16 11:58:27,288 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-16 11:58:27,289 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-16 11:58:27,345 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-16 11:58:27,572 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-16 11:58:27,573 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-16 11:58:27,573 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043641319]
[2022-11-16 11:58:27,573 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043641319] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-16 11:58:27,574 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-16 11:58:27,574 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-11-16 11:58:27,574 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724977996]
[2022-11-16 11:58:27,574 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-16 11:58:27,575 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-16 11:58:27,575 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-16 11:58:27,575 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-16 11:58:27,576 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-16 11:58:27,576 INFO  L87              Difference]: Start difference. First operand 6657 states and 9138 transitions. Second operand  has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-16 11:58:32,334 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-16 11:58:32,334 INFO  L93              Difference]: Finished difference Result 19637 states and 26969 transitions.
[2022-11-16 11:58:32,335 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-16 11:58:32,335 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85
[2022-11-16 11:58:32,335 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-16 11:58:32,378 INFO  L225             Difference]: With dead ends: 19637
[2022-11-16 11:58:32,378 INFO  L226             Difference]: Without dead ends: 12982
[2022-11-16 11:58:32,389 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
[2022-11-16 11:58:32,390 INFO  L413           NwaCegarLoop]: 1012 mSDtfsCounter, 791 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2485 mSolverCounterSat, 792 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 792 IncrementalHoareTripleChecker+Valid, 2485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time
[2022-11-16 11:58:32,391 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 1163 Invalid, 3277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [792 Valid, 2485 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time]
[2022-11-16 11:58:32,407 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12982 states.
[2022-11-16 11:58:32,612 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12982 to 12175.
[2022-11-16 11:58:32,634 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12175 states, 12174 states have (on average 1.2529160505996386) internal successors, (15253), 12174 states have internal predecessors, (15253), 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)
[2022-11-16 11:58:32,674 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12175 states to 12175 states and 15253 transitions.
[2022-11-16 11:58:32,674 INFO  L78                 Accepts]: Start accepts. Automaton has 12175 states and 15253 transitions. Word has length 85
[2022-11-16 11:58:32,675 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-16 11:58:32,675 INFO  L495      AbstractCegarLoop]: Abstraction has 12175 states and 15253 transitions.
[2022-11-16 11:58:32,675 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-16 11:58:32,676 INFO  L276                IsEmpty]: Start isEmpty. Operand 12175 states and 15253 transitions.
[2022-11-16 11:58:32,682 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 102
[2022-11-16 11:58:32,683 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-16 11:58:32,683 INFO  L195           NwaCegarLoop]: trace histogram [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]
[2022-11-16 11:58:32,683 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2022-11-16 11:58:32,683 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-16 11:58:32,684 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-16 11:58:32,684 INFO  L85        PathProgramCache]: Analyzing trace with hash -583563538, now seen corresponding path program 1 times
[2022-11-16 11:58:32,684 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-16 11:58:32,685 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086107114]
[2022-11-16 11:58:32,685 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-16 11:58:32,685 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-16 11:58:32,741 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-16 11:58:33,179 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-16 11:58:33,180 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-16 11:58:33,180 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086107114]
[2022-11-16 11:58:33,180 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086107114] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-16 11:58:33,181 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42480153]
[2022-11-16 11:58:33,181 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-16 11:58:33,181 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-16 11:58:33,181 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8/z3
[2022-11-16 11:58:33,185 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-16 11:58:33,218 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-11-16 11:58:33,298 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-16 11:58:33,300 INFO  L263         TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 2 conjunts are in the unsatisfiable core
[2022-11-16 11:58:33,308 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-16 11:58:33,504 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked.
[2022-11-16 11:58:33,505 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-11-16 11:58:33,505 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [42480153] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-16 11:58:33,505 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2022-11-16 11:58:33,506 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4
[2022-11-16 11:58:33,506 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814043848]
[2022-11-16 11:58:33,506 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-16 11:58:33,508 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-16 11:58:33,508 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-16 11:58:33,508 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-16 11:58:33,509 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2022-11-16 11:58:33,509 INFO  L87              Difference]: Start difference. First operand 12175 states and 15253 transitions. Second operand  has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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)
[2022-11-16 11:58:38,612 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-16 11:58:38,612 INFO  L93              Difference]: Finished difference Result 36312 states and 45491 transitions.
[2022-11-16 11:58:38,613 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-16 11:58:38,613 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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 101
[2022-11-16 11:58:38,613 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-16 11:58:38,659 INFO  L225             Difference]: With dead ends: 36312
[2022-11-16 11:58:38,659 INFO  L226             Difference]: Without dead ends: 24139
[2022-11-16 11:58:38,670 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2022-11-16 11:58:38,671 INFO  L413           NwaCegarLoop]: 708 mSDtfsCounter, 1053 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 2631 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 3175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 2631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time
[2022-11-16 11:58:38,672 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1053 Valid, 922 Invalid, 3175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 2631 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time]
[2022-11-16 11:58:38,696 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24139 states.
[2022-11-16 11:58:38,955 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24139 to 24121.
[2022-11-16 11:58:38,997 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 24121 states, 24120 states have (on average 1.2004145936981758) internal successors, (28954), 24120 states have internal predecessors, (28954), 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)
[2022-11-16 11:58:39,038 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 24121 states to 24121 states and 28954 transitions.
[2022-11-16 11:58:39,039 INFO  L78                 Accepts]: Start accepts. Automaton has 24121 states and 28954 transitions. Word has length 101
[2022-11-16 11:58:39,046 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-16 11:58:39,046 INFO  L495      AbstractCegarLoop]: Abstraction has 24121 states and 28954 transitions.
[2022-11-16 11:58:39,047 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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)
[2022-11-16 11:58:39,047 INFO  L276                IsEmpty]: Start isEmpty. Operand 24121 states and 28954 transitions.
[2022-11-16 11:58:39,053 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 205
[2022-11-16 11:58:39,053 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-16 11:58:39,053 INFO  L195           NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-16 11:58:39,064 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-11-16 11:58:39,259 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-16 11:58:39,260 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-16 11:58:39,260 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-16 11:58:39,260 INFO  L85        PathProgramCache]: Analyzing trace with hash -1395611265, now seen corresponding path program 1 times
[2022-11-16 11:58:39,260 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-16 11:58:39,261 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165910161]
[2022-11-16 11:58:39,261 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-16 11:58:39,261 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-16 11:58:39,305 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-16 11:58:39,816 INFO  L134       CoverageAnalysis]: Checked inductivity of 107 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2022-11-16 11:58:39,816 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-16 11:58:39,817 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165910161]
[2022-11-16 11:58:39,818 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165910161] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-16 11:58:39,818 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-16 11:58:39,818 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-11-16 11:58:39,818 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157330422]
[2022-11-16 11:58:39,818 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-16 11:58:39,819 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-16 11:58:39,820 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-16 11:58:39,820 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-16 11:58:39,820 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-16 11:58:39,821 INFO  L87              Difference]: Start difference. First operand 24121 states and 28954 transitions. Second operand  has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 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)
[2022-11-16 11:58:43,830 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-16 11:58:43,831 INFO  L93              Difference]: Finished difference Result 49027 states and 58708 transitions.
[2022-11-16 11:58:43,831 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-16 11:58:43,831 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 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 204
[2022-11-16 11:58:43,832 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-16 11:58:43,875 INFO  L225             Difference]: With dead ends: 49027
[2022-11-16 11:58:43,875 INFO  L226             Difference]: Without dead ends: 24908
[2022-11-16 11:58:43,896 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
[2022-11-16 11:58:43,897 INFO  L413           NwaCegarLoop]: 1083 mSDtfsCounter, 700 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 2529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time
[2022-11-16 11:58:43,897 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 1212 Invalid, 2529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time]
[2022-11-16 11:58:43,921 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24908 states.
[2022-11-16 11:58:44,206 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24908 to 24908.
[2022-11-16 11:58:44,231 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 24908 states, 24907 states have (on average 1.1942827317621552) internal successors, (29746), 24907 states have internal predecessors, (29746), 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)
[2022-11-16 11:58:44,272 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 24908 states to 24908 states and 29746 transitions.
[2022-11-16 11:58:44,273 INFO  L78                 Accepts]: Start accepts. Automaton has 24908 states and 29746 transitions. Word has length 204
[2022-11-16 11:58:44,273 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-16 11:58:44,273 INFO  L495      AbstractCegarLoop]: Abstraction has 24908 states and 29746 transitions.
[2022-11-16 11:58:44,274 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 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)
[2022-11-16 11:58:44,274 INFO  L276                IsEmpty]: Start isEmpty. Operand 24908 states and 29746 transitions.
[2022-11-16 11:58:44,276 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 212
[2022-11-16 11:58:44,277 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-16 11:58:44,277 INFO  L195           NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-16 11:58:44,277 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2022-11-16 11:58:44,277 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-16 11:58:44,278 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-16 11:58:44,278 INFO  L85        PathProgramCache]: Analyzing trace with hash -302953078, now seen corresponding path program 1 times
[2022-11-16 11:58:44,278 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-16 11:58:44,278 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332449736]
[2022-11-16 11:58:44,279 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-16 11:58:44,279 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-16 11:58:44,336 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-16 11:58:44,542 INFO  L134       CoverageAnalysis]: Checked inductivity of 114 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-16 11:58:44,543 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-16 11:58:44,543 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332449736]
[2022-11-16 11:58:44,543 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332449736] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-16 11:58:44,543 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-16 11:58:44,543 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-11-16 11:58:44,544 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882246897]
[2022-11-16 11:58:44,544 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-16 11:58:44,544 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-16 11:58:44,545 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-16 11:58:44,545 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-16 11:58:44,545 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-16 11:58:44,545 INFO  L87              Difference]: Start difference. First operand 24908 states and 29746 transitions. Second operand  has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 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)
[2022-11-16 11:58:49,585 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-16 11:58:49,585 INFO  L93              Difference]: Finished difference Result 61634 states and 75007 transitions.
[2022-11-16 11:58:49,585 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-16 11:58:49,585 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 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 211
[2022-11-16 11:58:49,586 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-16 11:58:49,654 INFO  L225             Difference]: With dead ends: 61634
[2022-11-16 11:58:49,654 INFO  L226             Difference]: Without dead ends: 37515
[2022-11-16 11:58:49,676 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-16 11:58:49,677 INFO  L413           NwaCegarLoop]: 826 mSDtfsCounter, 860 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 2390 mSolverCounterSat, 915 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 3305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 915 IncrementalHoareTripleChecker+Valid, 2390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time
[2022-11-16 11:58:49,677 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [860 Valid, 946 Invalid, 3305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [915 Valid, 2390 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time]
[2022-11-16 11:58:49,707 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 37515 states.
[2022-11-16 11:58:50,057 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 37515 to 35930.
[2022-11-16 11:58:50,088 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 35930 states, 35929 states have (on average 1.1822761557516213) internal successors, (42478), 35929 states have internal predecessors, (42478), 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)
[2022-11-16 11:58:50,136 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 35930 states to 35930 states and 42478 transitions.
[2022-11-16 11:58:50,136 INFO  L78                 Accepts]: Start accepts. Automaton has 35930 states and 42478 transitions. Word has length 211
[2022-11-16 11:58:50,137 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-16 11:58:50,138 INFO  L495      AbstractCegarLoop]: Abstraction has 35930 states and 42478 transitions.
[2022-11-16 11:58:50,138 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 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)
[2022-11-16 11:58:50,138 INFO  L276                IsEmpty]: Start isEmpty. Operand 35930 states and 42478 transitions.
[2022-11-16 11:58:50,143 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 227
[2022-11-16 11:58:50,143 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-16 11:58:50,143 INFO  L195           NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-16 11:58:50,144 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2022-11-16 11:58:50,144 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-16 11:58:50,145 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-16 11:58:50,145 INFO  L85        PathProgramCache]: Analyzing trace with hash -679347293, now seen corresponding path program 1 times
[2022-11-16 11:58:50,146 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-16 11:58:50,146 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811270080]
[2022-11-16 11:58:50,147 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-16 11:58:50,147 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-16 11:58:50,198 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-16 11:58:50,342 INFO  L134       CoverageAnalysis]: Checked inductivity of 107 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-16 11:58:50,343 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-16 11:58:50,343 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811270080]
[2022-11-16 11:58:50,343 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811270080] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-16 11:58:50,343 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-16 11:58:50,343 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-11-16 11:58:50,344 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993777071]
[2022-11-16 11:58:50,344 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-16 11:58:50,344 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-16 11:58:50,344 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-16 11:58:50,345 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-16 11:58:50,345 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-16 11:58:50,345 INFO  L87              Difference]: Start difference. First operand 35930 states and 42478 transitions. Second operand  has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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)
[2022-11-16 11:58:54,620 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-16 11:58:54,620 INFO  L93              Difference]: Finished difference Result 70920 states and 83955 transitions.
[2022-11-16 11:58:54,627 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-16 11:58:54,627 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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 226
[2022-11-16 11:58:54,628 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-16 11:58:54,682 INFO  L225             Difference]: With dead ends: 70920
[2022-11-16 11:58:54,682 INFO  L226             Difference]: Without dead ends: 35779
[2022-11-16 11:58:54,703 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-16 11:58:54,704 INFO  L413           NwaCegarLoop]: 1504 mSDtfsCounter, 1036 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2350 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 1641 SdHoareTripleChecker+Invalid, 2952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 2350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time
[2022-11-16 11:58:54,710 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1036 Valid, 1641 Invalid, 2952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 2350 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time]
[2022-11-16 11:58:54,740 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 35779 states.
[2022-11-16 11:58:55,253 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 35779 to 34201.
[2022-11-16 11:58:55,283 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 34201 states, 34200 states have (on average 1.1295906432748537) internal successors, (38632), 34200 states have internal predecessors, (38632), 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)
[2022-11-16 11:58:55,329 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 34201 states to 34201 states and 38632 transitions.
[2022-11-16 11:58:55,329 INFO  L78                 Accepts]: Start accepts. Automaton has 34201 states and 38632 transitions. Word has length 226
[2022-11-16 11:58:55,330 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-16 11:58:55,330 INFO  L495      AbstractCegarLoop]: Abstraction has 34201 states and 38632 transitions.
[2022-11-16 11:58:55,330 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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)
[2022-11-16 11:58:55,330 INFO  L276                IsEmpty]: Start isEmpty. Operand 34201 states and 38632 transitions.
[2022-11-16 11:58:55,335 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 301
[2022-11-16 11:58:55,336 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-16 11:58:55,336 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-16 11:58:55,336 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2022-11-16 11:58:55,336 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-16 11:58:55,337 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-16 11:58:55,337 INFO  L85        PathProgramCache]: Analyzing trace with hash -107437248, now seen corresponding path program 1 times
[2022-11-16 11:58:55,337 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-16 11:58:55,337 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685494251]
[2022-11-16 11:58:55,337 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-16 11:58:55,338 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-16 11:58:55,413 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-16 11:58:56,030 INFO  L134       CoverageAnalysis]: Checked inductivity of 301 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked.
[2022-11-16 11:58:56,030 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-16 11:58:56,030 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685494251]
[2022-11-16 11:58:56,030 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685494251] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-16 11:58:56,031 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-16 11:58:56,031 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-11-16 11:58:56,031 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955084091]
[2022-11-16 11:58:56,031 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-16 11:58:56,032 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-11-16 11:58:56,032 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-16 11:58:56,032 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-11-16 11:58:56,032 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-16 11:58:56,033 INFO  L87              Difference]: Start difference. First operand 34201 states and 38632 transitions. Second operand  has 4 states, 4 states have (on average 29.5) internal successors, (118), 3 states have internal predecessors, (118), 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)
[2022-11-16 11:59:03,674 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-16 11:59:03,674 INFO  L93              Difference]: Finished difference Result 109366 states and 124639 transitions.
[2022-11-16 11:59:03,675 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-11-16 11:59:03,675 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 29.5) internal successors, (118), 3 states have internal predecessors, (118), 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 300
[2022-11-16 11:59:03,676 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-16 11:59:03,761 INFO  L225             Difference]: With dead ends: 109366
[2022-11-16 11:59:03,762 INFO  L226             Difference]: Without dead ends: 75954
[2022-11-16 11:59:03,788 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
[2022-11-16 11:59:03,789 INFO  L413           NwaCegarLoop]: 576 mSDtfsCounter, 1807 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 4623 mSolverCounterSat, 1173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1807 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 5796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1173 IncrementalHoareTripleChecker+Valid, 4623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time
[2022-11-16 11:59:03,789 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1807 Valid, 752 Invalid, 5796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1173 Valid, 4623 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time]
[2022-11-16 11:59:03,849 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 75954 states.
[2022-11-16 11:59:04,703 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 75954 to 72802.
[2022-11-16 11:59:04,753 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 72802 states, 72801 states have (on average 1.120424169997665) internal successors, (81568), 72801 states have internal predecessors, (81568), 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)
[2022-11-16 11:59:04,855 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 72802 states to 72802 states and 81568 transitions.
[2022-11-16 11:59:04,855 INFO  L78                 Accepts]: Start accepts. Automaton has 72802 states and 81568 transitions. Word has length 300
[2022-11-16 11:59:04,856 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-16 11:59:04,856 INFO  L495      AbstractCegarLoop]: Abstraction has 72802 states and 81568 transitions.
[2022-11-16 11:59:04,856 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 29.5) internal successors, (118), 3 states have internal predecessors, (118), 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)
[2022-11-16 11:59:04,857 INFO  L276                IsEmpty]: Start isEmpty. Operand 72802 states and 81568 transitions.
[2022-11-16 11:59:04,862 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 301
[2022-11-16 11:59:04,862 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-16 11:59:04,862 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-16 11:59:04,863 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8
[2022-11-16 11:59:04,863 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-16 11:59:04,863 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-16 11:59:04,864 INFO  L85        PathProgramCache]: Analyzing trace with hash -697400388, now seen corresponding path program 1 times
[2022-11-16 11:59:04,864 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-16 11:59:04,864 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985553844]
[2022-11-16 11:59:04,864 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-16 11:59:04,864 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-16 11:59:04,922 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-16 11:59:05,188 INFO  L134       CoverageAnalysis]: Checked inductivity of 305 backedges. 295 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2022-11-16 11:59:05,189 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-16 11:59:05,189 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985553844]
[2022-11-16 11:59:05,189 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985553844] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-16 11:59:05,189 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-16 11:59:05,189 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-11-16 11:59:05,190 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123091537]
[2022-11-16 11:59:05,190 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-16 11:59:05,190 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-11-16 11:59:05,190 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-16 11:59:05,191 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-11-16 11:59:05,191 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-16 11:59:05,191 INFO  L87              Difference]: Start difference. First operand 72802 states and 81568 transitions. Second operand  has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 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)
[2022-11-16 11:59:15,011 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-16 11:59:15,011 INFO  L93              Difference]: Finished difference Result 202479 states and 227410 transitions.
[2022-11-16 11:59:15,012 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-11-16 11:59:15,012 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 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 300
[2022-11-16 11:59:15,012 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-16 11:59:15,320 INFO  L225             Difference]: With dead ends: 202479
[2022-11-16 11:59:15,320 INFO  L226             Difference]: Without dead ends: 130466
[2022-11-16 11:59:15,374 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
[2022-11-16 11:59:15,375 INFO  L413           NwaCegarLoop]: 542 mSDtfsCounter, 1726 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 5971 mSolverCounterSat, 1114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1726 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 7085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1114 IncrementalHoareTripleChecker+Valid, 5971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time
[2022-11-16 11:59:15,377 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1726 Valid, 731 Invalid, 7085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1114 Valid, 5971 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time]
[2022-11-16 11:59:15,483 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 130466 states.
[2022-11-16 11:59:16,977 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 130466 to 128762.
[2022-11-16 11:59:17,080 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 128762 states, 128761 states have (on average 1.1134427349896319) internal successors, (143368), 128761 states have internal predecessors, (143368), 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)
[2022-11-16 11:59:17,590 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 128762 states to 128762 states and 143368 transitions.
[2022-11-16 11:59:17,590 INFO  L78                 Accepts]: Start accepts. Automaton has 128762 states and 143368 transitions. Word has length 300
[2022-11-16 11:59:17,591 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-16 11:59:17,591 INFO  L495      AbstractCegarLoop]: Abstraction has 128762 states and 143368 transitions.
[2022-11-16 11:59:17,591 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 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)
[2022-11-16 11:59:17,591 INFO  L276                IsEmpty]: Start isEmpty. Operand 128762 states and 143368 transitions.
[2022-11-16 11:59:17,597 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 310
[2022-11-16 11:59:17,597 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-16 11:59:17,598 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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]
[2022-11-16 11:59:17,598 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9
[2022-11-16 11:59:17,598 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-16 11:59:17,599 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-16 11:59:17,599 INFO  L85        PathProgramCache]: Analyzing trace with hash -920626445, now seen corresponding path program 1 times
[2022-11-16 11:59:17,599 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-16 11:59:17,599 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119441957]
[2022-11-16 11:59:17,600 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-16 11:59:17,600 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-16 11:59:17,660 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-16 11:59:18,150 INFO  L134       CoverageAnalysis]: Checked inductivity of 293 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked.
[2022-11-16 11:59:18,150 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-16 11:59:18,150 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119441957]
[2022-11-16 11:59:18,150 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119441957] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-16 11:59:18,151 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-16 11:59:18,151 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-11-16 11:59:18,151 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656927818]
[2022-11-16 11:59:18,151 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-16 11:59:18,152 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-16 11:59:18,152 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-16 11:59:18,153 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-16 11:59:18,153 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-16 11:59:18,153 INFO  L87              Difference]: Start difference. First operand 128762 states and 143368 transitions. Second operand  has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 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)
[2022-11-16 11:59:23,455 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-16 11:59:23,455 INFO  L93              Difference]: Finished difference Result 243358 states and 271906 transitions.
[2022-11-16 11:59:23,456 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-16 11:59:23,456 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 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
[2022-11-16 11:59:23,456 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-16 11:59:23,626 INFO  L225             Difference]: With dead ends: 243358
[2022-11-16 11:59:23,626 INFO  L226             Difference]: Without dead ends: 127987
[2022-11-16 11:59:23,680 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
[2022-11-16 11:59:23,690 INFO  L413           NwaCegarLoop]: 1000 mSDtfsCounter, 728 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 2688 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 2692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time
[2022-11-16 11:59:23,692 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 1176 Invalid, 2692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2688 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time]
[2022-11-16 11:59:23,788 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 127987 states.
[2022-11-16 11:59:25,059 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 127987 to 127188.
[2022-11-16 11:59:25,131 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 127188 states, 127187 states have (on average 1.1140525368158696) internal successors, (141693), 127187 states have internal predecessors, (141693), 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)
[2022-11-16 11:59:25,618 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 127188 states to 127188 states and 141693 transitions.
[2022-11-16 11:59:25,618 INFO  L78                 Accepts]: Start accepts. Automaton has 127188 states and 141693 transitions. Word has length 309
[2022-11-16 11:59:25,619 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-16 11:59:25,619 INFO  L495      AbstractCegarLoop]: Abstraction has 127188 states and 141693 transitions.
[2022-11-16 11:59:25,628 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 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)
[2022-11-16 11:59:25,629 INFO  L276                IsEmpty]: Start isEmpty. Operand 127188 states and 141693 transitions.
[2022-11-16 11:59:25,636 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 339
[2022-11-16 11:59:25,636 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-16 11:59:25,636 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-16 11:59:25,636 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10
[2022-11-16 11:59:25,637 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-16 11:59:25,637 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-16 11:59:25,637 INFO  L85        PathProgramCache]: Analyzing trace with hash -89253303, now seen corresponding path program 1 times
[2022-11-16 11:59:25,637 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-16 11:59:25,638 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879733467]
[2022-11-16 11:59:25,638 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-16 11:59:25,650 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-16 11:59:25,739 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-16 11:59:27,492 INFO  L134       CoverageAnalysis]: Checked inductivity of 311 backedges. 188 proven. 113 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2022-11-16 11:59:27,492 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-16 11:59:27,492 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879733467]
[2022-11-16 11:59:27,492 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879733467] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-16 11:59:27,492 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048141865]
[2022-11-16 11:59:27,493 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-16 11:59:27,493 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-16 11:59:27,493 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8/z3
[2022-11-16 11:59:27,494 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-16 11:59:27,497 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-11-16 11:59:27,667 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-16 11:59:27,670 INFO  L263         TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 2 conjunts are in the unsatisfiable core
[2022-11-16 11:59:27,690 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-16 11:59:27,884 INFO  L134       CoverageAnalysis]: Checked inductivity of 311 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked.
[2022-11-16 11:59:27,884 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-11-16 11:59:27,884 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048141865] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-16 11:59:27,885 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2022-11-16 11:59:27,885 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9
[2022-11-16 11:59:27,885 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845684469]
[2022-11-16 11:59:27,885 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-16 11:59:27,886 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-16 11:59:27,886 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-16 11:59:27,886 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-16 11:59:27,886 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72
[2022-11-16 11:59:27,887 INFO  L87              Difference]: Start difference. First operand 127188 states and 141693 transitions. Second operand  has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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)
[2022-11-16 11:59:32,593 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-16 11:59:32,593 INFO  L93              Difference]: Finished difference Result 253586 states and 282592 transitions.
[2022-11-16 11:59:32,594 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-16 11:59:32,594 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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 338
[2022-11-16 11:59:32,595 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-16 11:59:33,078 INFO  L225             Difference]: With dead ends: 253586
[2022-11-16 11:59:33,078 INFO  L226             Difference]: Without dead ends: 127187
[2022-11-16 11:59:33,137 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72
[2022-11-16 11:59:33,138 INFO  L413           NwaCegarLoop]: 1342 mSDtfsCounter, 1113 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2462 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 2462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time
[2022-11-16 11:59:33,138 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1113 Valid, 1421 Invalid, 2905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 2462 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time]
[2022-11-16 11:59:33,236 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 127187 states.
[2022-11-16 11:59:34,440 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 127187 to 127185.
[2022-11-16 11:59:34,513 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 127185 states, 127184 states have (on average 1.085451000125802) internal successors, (138052), 127184 states have internal predecessors, (138052), 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)
[2022-11-16 11:59:34,637 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 127185 states to 127185 states and 138052 transitions.
[2022-11-16 11:59:34,638 INFO  L78                 Accepts]: Start accepts. Automaton has 127185 states and 138052 transitions. Word has length 338
[2022-11-16 11:59:34,638 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-16 11:59:34,638 INFO  L495      AbstractCegarLoop]: Abstraction has 127185 states and 138052 transitions.
[2022-11-16 11:59:34,638 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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)
[2022-11-16 11:59:34,639 INFO  L276                IsEmpty]: Start isEmpty. Operand 127185 states and 138052 transitions.
[2022-11-16 11:59:34,644 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 407
[2022-11-16 11:59:34,644 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-16 11:59:34,645 INFO  L195           NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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]
[2022-11-16 11:59:34,655 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-11-16 11:59:34,850 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11
[2022-11-16 11:59:34,850 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-16 11:59:34,851 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-16 11:59:34,851 INFO  L85        PathProgramCache]: Analyzing trace with hash 826877036, now seen corresponding path program 1 times
[2022-11-16 11:59:34,851 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-16 11:59:34,851 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35471270]
[2022-11-16 11:59:34,851 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-16 11:59:34,851 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-16 11:59:35,407 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-16 11:59:35,673 INFO  L134       CoverageAnalysis]: Checked inductivity of 538 backedges. 266 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked.
[2022-11-16 11:59:35,673 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-16 11:59:35,673 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35471270]
[2022-11-16 11:59:35,673 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35471270] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-16 11:59:35,674 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-16 11:59:35,674 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-11-16 11:59:35,674 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373026433]
[2022-11-16 11:59:35,674 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-16 11:59:35,675 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-16 11:59:35,675 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-16 11:59:35,675 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-16 11:59:35,675 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-16 11:59:35,676 INFO  L87              Difference]: Start difference. First operand 127185 states and 138052 transitions. Second operand  has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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)
[2022-11-16 11:59:41,530 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-16 11:59:41,531 INFO  L93              Difference]: Finished difference Result 292945 states and 320174 transitions.
[2022-11-16 11:59:41,531 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-16 11:59:41,532 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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 406
[2022-11-16 11:59:41,533 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-16 11:59:41,730 INFO  L225             Difference]: With dead ends: 292945
[2022-11-16 11:59:41,730 INFO  L226             Difference]: Without dead ends: 164188
[2022-11-16 11:59:41,777 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-16 11:59:41,781 INFO  L413           NwaCegarLoop]: 1750 mSDtfsCounter, 785 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 2530 mSolverCounterSat, 714 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 1894 SdHoareTripleChecker+Invalid, 3244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 714 IncrementalHoareTripleChecker+Valid, 2530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time
[2022-11-16 11:59:41,782 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [785 Valid, 1894 Invalid, 3244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [714 Valid, 2530 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time]
[2022-11-16 11:59:41,910 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 164188 states.
[2022-11-16 11:59:43,407 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 164188 to 161023.
[2022-11-16 11:59:43,865 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 161023 states, 161022 states have (on average 1.0724310963719244) internal successors, (172685), 161022 states have internal predecessors, (172685), 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)
[2022-11-16 11:59:44,134 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 161023 states to 161023 states and 172685 transitions.
[2022-11-16 11:59:44,134 INFO  L78                 Accepts]: Start accepts. Automaton has 161023 states and 172685 transitions. Word has length 406
[2022-11-16 11:59:44,135 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-16 11:59:44,135 INFO  L495      AbstractCegarLoop]: Abstraction has 161023 states and 172685 transitions.
[2022-11-16 11:59:44,135 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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)
[2022-11-16 11:59:44,135 INFO  L276                IsEmpty]: Start isEmpty. Operand 161023 states and 172685 transitions.
[2022-11-16 11:59:44,143 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 429
[2022-11-16 11:59:44,143 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-16 11:59:44,144 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-16 11:59:44,144 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12
[2022-11-16 11:59:44,144 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-16 11:59:44,145 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-16 11:59:44,145 INFO  L85        PathProgramCache]: Analyzing trace with hash -2077582457, now seen corresponding path program 1 times
[2022-11-16 11:59:44,145 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-16 11:59:44,145 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551022712]
[2022-11-16 11:59:44,145 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-16 11:59:44,146 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-16 11:59:44,221 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-16 11:59:45,776 INFO  L134       CoverageAnalysis]: Checked inductivity of 380 backedges. 260 proven. 110 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2022-11-16 11:59:45,777 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-16 11:59:45,777 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551022712]
[2022-11-16 11:59:45,777 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551022712] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-16 11:59:45,777 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239930329]
[2022-11-16 11:59:45,777 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-16 11:59:45,778 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-16 11:59:45,778 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8/z3
[2022-11-16 11:59:45,779 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-16 11:59:45,798 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-11-16 11:59:45,978 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-16 11:59:45,981 INFO  L263         TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 2 conjunts are in the unsatisfiable core
[2022-11-16 11:59:45,987 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-16 11:59:46,036 INFO  L134       CoverageAnalysis]: Checked inductivity of 380 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked.
[2022-11-16 11:59:46,036 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-11-16 11:59:46,036 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239930329] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-16 11:59:46,036 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2022-11-16 11:59:46,037 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8
[2022-11-16 11:59:46,037 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713721677]
[2022-11-16 11:59:46,037 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-16 11:59:46,038 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-16 11:59:46,038 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-16 11:59:46,038 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-16 11:59:46,039 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2022-11-16 11:59:46,039 INFO  L87              Difference]: Start difference. First operand 161023 states and 172685 transitions. Second operand  has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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)
[2022-11-16 11:59:52,095 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-16 11:59:52,095 INFO  L93              Difference]: Finished difference Result 354320 states and 382192 transitions.
[2022-11-16 11:59:52,096 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-16 11:59:52,096 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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 428
[2022-11-16 11:59:52,097 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-16 11:59:52,348 INFO  L225             Difference]: With dead ends: 354320
[2022-11-16 11:59:52,348 INFO  L226             Difference]: Without dead ends: 194086
[2022-11-16 11:59:52,418 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2022-11-16 11:59:52,419 INFO  L413           NwaCegarLoop]: 651 mSDtfsCounter, 1023 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2367 mSolverCounterSat, 998 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 3365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 998 IncrementalHoareTripleChecker+Valid, 2367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time
[2022-11-16 11:59:52,419 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1023 Valid, 734 Invalid, 3365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [998 Valid, 2367 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time]
[2022-11-16 11:59:52,576 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 194086 states.
[2022-11-16 11:59:54,493 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 194086 to 191704.
[2022-11-16 11:59:54,572 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 191704 states, 191703 states have (on average 1.0757630292692342) internal successors, (206227), 191703 states have internal predecessors, (206227), 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)
[2022-11-16 11:59:54,793 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 191704 states to 191704 states and 206227 transitions.
[2022-11-16 11:59:54,793 INFO  L78                 Accepts]: Start accepts. Automaton has 191704 states and 206227 transitions. Word has length 428
[2022-11-16 11:59:54,794 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-16 11:59:54,794 INFO  L495      AbstractCegarLoop]: Abstraction has 191704 states and 206227 transitions.
[2022-11-16 11:59:54,794 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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)
[2022-11-16 11:59:54,794 INFO  L276                IsEmpty]: Start isEmpty. Operand 191704 states and 206227 transitions.
[2022-11-16 11:59:54,808 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 526
[2022-11-16 11:59:54,808 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-16 11:59:54,808 INFO  L195           NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 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]
[2022-11-16 11:59:54,813 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2022-11-16 11:59:55,009 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d32e815-46b4-4c41-af03-74308b906abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-16 11:59:55,009 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-16 11:59:55,010 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-16 11:59:55,010 INFO  L85        PathProgramCache]: Analyzing trace with hash -851661849, now seen corresponding path program 1 times
[2022-11-16 11:59:55,010 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-16 11:59:55,010 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142366624]
[2022-11-16 11:59:55,010 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-16 11:59:55,011 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-16 11:59:55,115 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-16 11:59:55,424 INFO  L134       CoverageAnalysis]: Checked inductivity of 967 backedges. 768 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked.
[2022-11-16 11:59:55,424 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-16 11:59:55,424 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142366624]
[2022-11-16 11:59:55,424 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142366624] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-16 11:59:55,424 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-16 11:59:55,425 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-11-16 11:59:55,425 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353187381]
[2022-11-16 11:59:55,425 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-16 11:59:55,426 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-16 11:59:55,426 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-16 11:59:55,426 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-16 11:59:55,426 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-16 11:59:55,427 INFO  L87              Difference]: Start difference. First operand 191704 states and 206227 transitions. Second operand  has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 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)
[2022-11-16 12:00:01,640 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-16 12:00:01,640 INFO  L93              Difference]: Finished difference Result 384202 states and 413257 transitions.
[2022-11-16 12:00:01,640 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-16 12:00:01,640 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 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 525
[2022-11-16 12:00:01,641 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-16 12:00:01,843 INFO  L225             Difference]: With dead ends: 384202
[2022-11-16 12:00:01,844 INFO  L226             Difference]: Without dead ends: 193287
[2022-11-16 12:00:01,915 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-16 12:00:01,916 INFO  L413           NwaCegarLoop]: 1397 mSDtfsCounter, 934 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2485 mSolverCounterSat, 581 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 3066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 581 IncrementalHoareTripleChecker+Valid, 2485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time
[2022-11-16 12:00:01,916 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [934 Valid, 1482 Invalid, 3066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [581 Valid, 2485 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time]
[2022-11-16 12:00:02,061 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 193287 states.
[2022-11-16 12:00:03,920 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 193287 to 191697.
[2022-11-16 12:00:04,002 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 191697 states, 191696 states have (on average 1.0583371588348218) internal successors, (202879), 191696 states have internal predecessors, (202879), 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)
[2022-11-16 12:00:04,185 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 191697 states to 191697 states and 202879 transitions.
[2022-11-16 12:00:04,185 INFO  L78                 Accepts]: Start accepts. Automaton has 191697 states and 202879 transitions. Word has length 525
[2022-11-16 12:00:04,186 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-16 12:00:04,186 INFO  L495      AbstractCegarLoop]: Abstraction has 191697 states and 202879 transitions.
[2022-11-16 12:00:04,186 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 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)
[2022-11-16 12:00:04,186 INFO  L276                IsEmpty]: Start isEmpty. Operand 191697 states and 202879 transitions.
[2022-11-16 12:00:04,200 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 567
[2022-11-16 12:00:04,200 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-16 12:00:04,201 INFO  L195           NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-16 12:00:04,201 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14
[2022-11-16 12:00:04,201 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-16 12:00:04,202 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-16 12:00:04,202 INFO  L85        PathProgramCache]: Analyzing trace with hash -1699556428, now seen corresponding path program 1 times
[2022-11-16 12:00:04,202 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-16 12:00:04,202 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521329796]
[2022-11-16 12:00:04,202 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-16 12:00:04,203 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-16 12:00:04,296 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat