./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem11_label02.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 38b53e6a
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_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem11_label02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R --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 30f62f9fddfecd916215dd8f1b75b140359bb989ba38a829add2eea4e4b271dc
--- 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-38b53e6
[2022-11-25 17:06:43,041 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-11-25 17:06:43,044 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-11-25 17:06:43,069 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-11-25 17:06:43,070 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-11-25 17:06:43,072 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-11-25 17:06:43,074 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-11-25 17:06:43,076 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-11-25 17:06:43,078 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-11-25 17:06:43,079 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-11-25 17:06:43,081 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-11-25 17:06:43,082 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-11-25 17:06:43,083 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-11-25 17:06:43,085 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-11-25 17:06:43,086 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-11-25 17:06:43,088 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-11-25 17:06:43,089 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-11-25 17:06:43,091 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-11-25 17:06:43,093 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-11-25 17:06:43,096 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-11-25 17:06:43,098 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-11-25 17:06:43,100 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-11-25 17:06:43,102 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-11-25 17:06:43,103 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-11-25 17:06:43,108 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-11-25 17:06:43,109 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-11-25 17:06:43,110 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-11-25 17:06:43,111 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-11-25 17:06:43,112 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-11-25 17:06:43,113 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-11-25 17:06:43,113 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-11-25 17:06:43,115 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-11-25 17:06:43,116 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-11-25 17:06:43,117 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-11-25 17:06:43,118 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-11-25 17:06:43,119 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-11-25 17:06:43,120 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-11-25 17:06:43,120 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-11-25 17:06:43,121 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-11-25 17:06:43,122 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-11-25 17:06:43,123 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-11-25 17:06:43,131 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf
[2022-11-25 17:06:43,180 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-11-25 17:06:43,181 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-11-25 17:06:43,182 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-11-25 17:06:43,182 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-11-25 17:06:43,184 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-11-25 17:06:43,184 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-11-25 17:06:43,185 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-11-25 17:06:43,186 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-11-25 17:06:43,186 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-11-25 17:06:43,187 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-11-25 17:06:43,188 INFO  L138        SettingsManager]:  * sizeof long=4
[2022-11-25 17:06:43,188 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-11-25 17:06:43,189 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2022-11-25 17:06:43,189 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-11-25 17:06:43,190 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-11-25 17:06:43,190 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-11-25 17:06:43,190 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-11-25 17:06:43,191 INFO  L138        SettingsManager]:  * sizeof long double=12
[2022-11-25 17:06:43,191 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-11-25 17:06:43,191 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-11-25 17:06:43,192 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-11-25 17:06:43,192 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-11-25 17:06:43,193 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-11-25 17:06:43,193 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-11-25 17:06:43,193 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-11-25 17:06:43,194 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-11-25 17:06:43,194 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-11-25 17:06:43,195 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-11-25 17:06:43,195 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-11-25 17:06:43,195 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-11-25 17:06:43,196 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-11-25 17:06:43,196 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-11-25 17:06:43,197 INFO  L138        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2022-11-25 17:06:43,197 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-11-25 17:06:43,198 INFO  L138        SettingsManager]:  * Looper check in Petri net analysis=SEMANTIC
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/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_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R
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 -> 30f62f9fddfecd916215dd8f1b75b140359bb989ba38a829add2eea4e4b271dc
[2022-11-25 17:06:43,552 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-11-25 17:06:43,586 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-11-25 17:06:43,589 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-11-25 17:06:43,591 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-11-25 17:06:43,594 INFO  L275        PluginConnector]: CDTParser initialized
[2022-11-25 17:06:43,596 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/eca-rers2012/Problem11_label02.c
[2022-11-25 17:06:47,229 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2022-11-25 17:06:47,709 INFO  L351              CDTParser]: Found 1 translation units.
[2022-11-25 17:06:47,710 INFO  L172              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/sv-benchmarks/c/eca-rers2012/Problem11_label02.c
[2022-11-25 17:06:47,734 INFO  L394              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/data/63bc08769/2be7b23a5c3845548a7167d08c5ae5a3/FLAG343c7e77e
[2022-11-25 17:06:47,758 INFO  L402              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/data/63bc08769/2be7b23a5c3845548a7167d08c5ae5a3
[2022-11-25 17:06:47,762 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-11-25 17:06:47,764 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-11-25 17:06:47,769 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-11-25 17:06:47,771 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-11-25 17:06:47,777 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-11-25 17:06:47,782 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:06:47" (1/1) ...
[2022-11-25 17:06:47,783 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4744732f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:06:47, skipping insertion in model container
[2022-11-25 17:06:47,784 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:06:47" (1/1) ...
[2022-11-25 17:06:47,794 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-11-25 17:06:47,874 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-11-25 17:06:48,277 WARN  L237   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_2901b235-e8a4-4305-8615-e8a8380102fe/sv-benchmarks/c/eca-rers2012/Problem11_label02.c[7865,7878]
[2022-11-25 17:06:48,563 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-11-25 17:06:48,576 INFO  L203         MainTranslator]: Completed pre-run
[2022-11-25 17:06:48,609 WARN  L237   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_2901b235-e8a4-4305-8615-e8a8380102fe/sv-benchmarks/c/eca-rers2012/Problem11_label02.c[7865,7878]
[2022-11-25 17:06:48,794 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-11-25 17:06:48,815 INFO  L208         MainTranslator]: Completed translation
[2022-11-25 17:06:48,816 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:06:48 WrapperNode
[2022-11-25 17:06:48,816 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-11-25 17:06:48,818 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-11-25 17:06:48,818 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-11-25 17:06:48,818 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-11-25 17:06:48,827 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:06:48" (1/1) ...
[2022-11-25 17:06:48,863 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:06:48" (1/1) ...
[2022-11-25 17:06:49,015 INFO  L138                Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 999
[2022-11-25 17:06:49,016 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-11-25 17:06:49,017 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-11-25 17:06:49,017 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-11-25 17:06:49,017 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-11-25 17:06:49,030 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:06:48" (1/1) ...
[2022-11-25 17:06:49,031 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:06:48" (1/1) ...
[2022-11-25 17:06:49,045 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:06:48" (1/1) ...
[2022-11-25 17:06:49,045 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:06:48" (1/1) ...
[2022-11-25 17:06:49,093 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:06:48" (1/1) ...
[2022-11-25 17:06:49,104 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:06:48" (1/1) ...
[2022-11-25 17:06:49,114 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:06:48" (1/1) ...
[2022-11-25 17:06:49,126 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:06:48" (1/1) ...
[2022-11-25 17:06:49,163 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-11-25 17:06:49,165 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-11-25 17:06:49,167 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-11-25 17:06:49,167 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-11-25 17:06:49,168 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:06:48" (1/1) ...
[2022-11-25 17:06:49,179 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-11-25 17:06:49,195 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3
[2022-11-25 17:06:49,217 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-11-25 17:06:49,243 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-11-25 17:06:49,272 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-11-25 17:06:49,274 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2022-11-25 17:06:49,274 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-11-25 17:06:49,274 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-11-25 17:06:49,369 INFO  L235             CfgBuilder]: Building ICFG
[2022-11-25 17:06:49,372 INFO  L261             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-11-25 17:06:51,679 INFO  L276             CfgBuilder]: Performing block encoding
[2022-11-25 17:06:51,691 INFO  L295             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-11-25 17:06:51,692 INFO  L300             CfgBuilder]: Removed 1 assume(true) statements.
[2022-11-25 17:06:51,695 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:06:51 BoogieIcfgContainer
[2022-11-25 17:06:51,695 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-11-25 17:06:51,698 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-11-25 17:06:51,698 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-11-25 17:06:51,702 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-11-25 17:06:51,702 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:06:47" (1/3) ...
[2022-11-25 17:06:51,703 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55927bb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:06:51, skipping insertion in model container
[2022-11-25 17:06:51,704 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:06:48" (2/3) ...
[2022-11-25 17:06:51,704 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55927bb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:06:51, skipping insertion in model container
[2022-11-25 17:06:51,704 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:06:51" (3/3) ...
[2022-11-25 17:06:51,706 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem11_label02.c
[2022-11-25 17:06:51,731 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-11-25 17:06:51,731 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-11-25 17:06:51,832 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-11-25 17:06:51,844 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;@2354e52e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2022-11-25 17:06:51,845 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-11-25 17:06:51,852 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 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)
[2022-11-25 17:06:51,862 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 55
[2022-11-25 17:06:51,863 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-25 17:06:51,864 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-25 17:06:51,864 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-25 17:06:51,870 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-25 17:06:51,871 INFO  L85        PathProgramCache]: Analyzing trace with hash 1425694346, now seen corresponding path program 1 times
[2022-11-25 17:06:51,883 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-25 17:06:51,883 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251316868]
[2022-11-25 17:06:51,884 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:06:51,884 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-25 17:06:52,102 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:06:52,451 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-25 17:06:52,452 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-25 17:06:52,453 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251316868]
[2022-11-25 17:06:52,454 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251316868] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-25 17:06:52,454 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-25 17:06:52,455 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-11-25 17:06:52,457 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855244935]
[2022-11-25 17:06:52,459 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-25 17:06:52,464 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-25 17:06:52,466 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-25 17:06:52,519 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-25 17:06:52,520 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-25 17:06:52,523 INFO  L87              Difference]: Start difference. First operand  has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 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 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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)
[2022-11-25 17:06:54,398 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-25 17:06:54,399 INFO  L93              Difference]: Finished difference Result 769 states and 1360 transitions.
[2022-11-25 17:06:54,400 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-25 17:06:54,402 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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 54
[2022-11-25 17:06:54,403 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-25 17:06:54,419 INFO  L225             Difference]: With dead ends: 769
[2022-11-25 17:06:54,419 INFO  L226             Difference]: Without dead ends: 422
[2022-11-25 17:06:54,424 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
[2022-11-25 17:06:54,428 INFO  L413           NwaCegarLoop]: 141 mSDtfsCounter, 186 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time
[2022-11-25 17:06:54,430 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 163 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time]
[2022-11-25 17:06:54,451 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 422 states.
[2022-11-25 17:06:54,511 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 412.
[2022-11-25 17:06:54,514 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 412 states, 411 states have (on average 1.5231143552311435) internal successors, (626), 411 states have internal predecessors, (626), 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)
[2022-11-25 17:06:54,516 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 626 transitions.
[2022-11-25 17:06:54,518 INFO  L78                 Accepts]: Start accepts. Automaton has 412 states and 626 transitions. Word has length 54
[2022-11-25 17:06:54,518 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-25 17:06:54,519 INFO  L495      AbstractCegarLoop]: Abstraction has 412 states and 626 transitions.
[2022-11-25 17:06:54,519 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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)
[2022-11-25 17:06:54,519 INFO  L276                IsEmpty]: Start isEmpty. Operand 412 states and 626 transitions.
[2022-11-25 17:06:54,524 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 121
[2022-11-25 17:06:54,524 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-25 17:06:54,525 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2022-11-25 17:06:54,525 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-11-25 17:06:54,525 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-25 17:06:54,526 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-25 17:06:54,527 INFO  L85        PathProgramCache]: Analyzing trace with hash 808427271, now seen corresponding path program 1 times
[2022-11-25 17:06:54,527 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-25 17:06:54,527 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842025611]
[2022-11-25 17:06:54,528 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:06:54,528 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-25 17:06:54,593 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:06:54,759 INFO  L134       CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-25 17:06:54,760 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-25 17:06:54,760 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842025611]
[2022-11-25 17:06:54,761 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842025611] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-25 17:06:54,761 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-25 17:06:54,761 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-11-25 17:06:54,762 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294365129]
[2022-11-25 17:06:54,762 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-25 17:06:54,764 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-25 17:06:54,764 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-25 17:06:54,765 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-25 17:06:54,765 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-25 17:06:54,766 INFO  L87              Difference]: Start difference. First operand 412 states and 626 transitions. Second operand  has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 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)
[2022-11-25 17:06:56,058 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-25 17:06:56,059 INFO  L93              Difference]: Finished difference Result 1194 states and 1821 transitions.
[2022-11-25 17:06:56,062 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-25 17:06:56,063 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 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 120
[2022-11-25 17:06:56,063 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-25 17:06:56,068 INFO  L225             Difference]: With dead ends: 1194
[2022-11-25 17:06:56,068 INFO  L226             Difference]: Without dead ends: 784
[2022-11-25 17:06:56,070 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
[2022-11-25 17:06:56,072 INFO  L413           NwaCegarLoop]: 130 mSDtfsCounter, 175 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time
[2022-11-25 17:06:56,072 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 154 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time]
[2022-11-25 17:06:56,075 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 784 states.
[2022-11-25 17:06:56,109 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 784.
[2022-11-25 17:06:56,111 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 784 states, 783 states have (on average 1.3742017879948913) internal successors, (1076), 783 states have internal predecessors, (1076), 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)
[2022-11-25 17:06:56,115 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1076 transitions.
[2022-11-25 17:06:56,116 INFO  L78                 Accepts]: Start accepts. Automaton has 784 states and 1076 transitions. Word has length 120
[2022-11-25 17:06:56,116 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-25 17:06:56,116 INFO  L495      AbstractCegarLoop]: Abstraction has 784 states and 1076 transitions.
[2022-11-25 17:06:56,117 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 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)
[2022-11-25 17:06:56,117 INFO  L276                IsEmpty]: Start isEmpty. Operand 784 states and 1076 transitions.
[2022-11-25 17:06:56,121 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 125
[2022-11-25 17:06:56,121 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-25 17:06:56,122 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2022-11-25 17:06:56,122 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-11-25 17:06:56,123 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-25 17:06:56,123 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-25 17:06:56,124 INFO  L85        PathProgramCache]: Analyzing trace with hash -1746590275, now seen corresponding path program 1 times
[2022-11-25 17:06:56,124 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-25 17:06:56,124 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732531123]
[2022-11-25 17:06:56,125 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:06:56,125 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-25 17:06:56,217 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:06:56,747 INFO  L134       CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-25 17:06:56,748 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-25 17:06:56,748 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732531123]
[2022-11-25 17:06:56,748 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732531123] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-25 17:06:56,749 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-25 17:06:56,749 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-11-25 17:06:56,749 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575610028]
[2022-11-25 17:06:56,750 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-25 17:06:56,750 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-25 17:06:56,751 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-25 17:06:56,751 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-25 17:06:56,752 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-25 17:06:56,752 INFO  L87              Difference]: Start difference. First operand 784 states and 1076 transitions. Second operand  has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 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)
[2022-11-25 17:06:57,979 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-25 17:06:57,980 INFO  L93              Difference]: Finished difference Result 1936 states and 2599 transitions.
[2022-11-25 17:06:57,981 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-25 17:06:57,981 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 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 124
[2022-11-25 17:06:57,982 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-25 17:06:57,989 INFO  L225             Difference]: With dead ends: 1936
[2022-11-25 17:06:57,990 INFO  L226             Difference]: Without dead ends: 1154
[2022-11-25 17:06:57,996 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
[2022-11-25 17:06:58,000 INFO  L413           NwaCegarLoop]: 168 mSDtfsCounter, 119 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time
[2022-11-25 17:06:58,003 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 190 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time]
[2022-11-25 17:06:58,006 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1154 states.
[2022-11-25 17:06:58,046 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 1153.
[2022-11-25 17:06:58,075 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1153 states, 1152 states have (on average 1.2699652777777777) internal successors, (1463), 1152 states have internal predecessors, (1463), 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)
[2022-11-25 17:06:58,080 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1463 transitions.
[2022-11-25 17:06:58,080 INFO  L78                 Accepts]: Start accepts. Automaton has 1153 states and 1463 transitions. Word has length 124
[2022-11-25 17:06:58,081 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-25 17:06:58,081 INFO  L495      AbstractCegarLoop]: Abstraction has 1153 states and 1463 transitions.
[2022-11-25 17:06:58,081 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 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)
[2022-11-25 17:06:58,082 INFO  L276                IsEmpty]: Start isEmpty. Operand 1153 states and 1463 transitions.
[2022-11-25 17:06:58,085 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 167
[2022-11-25 17:06:58,085 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-25 17:06:58,086 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-25 17:06:58,086 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2022-11-25 17:06:58,086 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-25 17:06:58,087 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-25 17:06:58,087 INFO  L85        PathProgramCache]: Analyzing trace with hash -948152282, now seen corresponding path program 1 times
[2022-11-25 17:06:58,088 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-25 17:06:58,088 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658658736]
[2022-11-25 17:06:58,088 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:06:58,088 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-25 17:06:58,153 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:06:58,364 INFO  L134       CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked.
[2022-11-25 17:06:58,365 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-25 17:06:58,366 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658658736]
[2022-11-25 17:06:58,366 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658658736] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-25 17:06:58,366 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-25 17:06:58,366 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-11-25 17:06:58,367 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99887572]
[2022-11-25 17:06:58,367 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-25 17:06:58,369 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-25 17:06:58,369 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-25 17:06:58,370 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-25 17:06:58,370 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-25 17:06:58,370 INFO  L87              Difference]: Start difference. First operand 1153 states and 1463 transitions. Second operand  has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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)
[2022-11-25 17:06:59,455 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-25 17:06:59,455 INFO  L93              Difference]: Finished difference Result 2494 states and 3189 transitions.
[2022-11-25 17:06:59,456 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-25 17:06:59,457 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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 166
[2022-11-25 17:06:59,459 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-25 17:06:59,465 INFO  L225             Difference]: With dead ends: 2494
[2022-11-25 17:06:59,468 INFO  L226             Difference]: Without dead ends: 1527
[2022-11-25 17:06:59,469 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
[2022-11-25 17:06:59,482 INFO  L413           NwaCegarLoop]: 126 mSDtfsCounter, 106 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time
[2022-11-25 17:06:59,483 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 154 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time]
[2022-11-25 17:06:59,485 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1527 states.
[2022-11-25 17:06:59,522 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 1526.
[2022-11-25 17:06:59,525 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1526 states, 1525 states have (on average 1.2557377049180327) internal successors, (1915), 1525 states have internal predecessors, (1915), 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)
[2022-11-25 17:06:59,532 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 1915 transitions.
[2022-11-25 17:06:59,533 INFO  L78                 Accepts]: Start accepts. Automaton has 1526 states and 1915 transitions. Word has length 166
[2022-11-25 17:06:59,533 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-25 17:06:59,534 INFO  L495      AbstractCegarLoop]: Abstraction has 1526 states and 1915 transitions.
[2022-11-25 17:06:59,534 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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)
[2022-11-25 17:06:59,535 INFO  L276                IsEmpty]: Start isEmpty. Operand 1526 states and 1915 transitions.
[2022-11-25 17:06:59,546 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 182
[2022-11-25 17:06:59,547 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-25 17:06:59,547 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-25 17:06:59,548 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2022-11-25 17:06:59,548 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-25 17:06:59,550 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-25 17:06:59,550 INFO  L85        PathProgramCache]: Analyzing trace with hash -728761857, now seen corresponding path program 1 times
[2022-11-25 17:06:59,550 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-25 17:06:59,551 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084776876]
[2022-11-25 17:06:59,552 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:06:59,552 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-25 17:06:59,641 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:06:59,880 INFO  L134       CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-25 17:06:59,881 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-25 17:06:59,881 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084776876]
[2022-11-25 17:06:59,881 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084776876] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-25 17:06:59,881 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-25 17:06:59,882 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-11-25 17:06:59,882 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776181098]
[2022-11-25 17:06:59,882 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-25 17:06:59,883 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-25 17:06:59,883 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-25 17:06:59,884 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-25 17:06:59,884 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-25 17:06:59,885 INFO  L87              Difference]: Start difference. First operand 1526 states and 1915 transitions. Second operand  has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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)
[2022-11-25 17:07:01,028 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-25 17:07:01,029 INFO  L93              Difference]: Finished difference Result 2864 states and 3636 transitions.
[2022-11-25 17:07:01,029 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-25 17:07:01,030 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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 181
[2022-11-25 17:07:01,030 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-25 17:07:01,036 INFO  L225             Difference]: With dead ends: 2864
[2022-11-25 17:07:01,037 INFO  L226             Difference]: Without dead ends: 1524
[2022-11-25 17:07:01,038 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
[2022-11-25 17:07:01,040 INFO  L413           NwaCegarLoop]: 286 mSDtfsCounter, 181 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time
[2022-11-25 17:07:01,040 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 306 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time]
[2022-11-25 17:07:01,043 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1524 states.
[2022-11-25 17:07:01,072 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1524.
[2022-11-25 17:07:01,075 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1524 states, 1523 states have (on average 1.2107682206172028) internal successors, (1844), 1523 states have internal predecessors, (1844), 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)
[2022-11-25 17:07:01,080 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 1844 transitions.
[2022-11-25 17:07:01,081 INFO  L78                 Accepts]: Start accepts. Automaton has 1524 states and 1844 transitions. Word has length 181
[2022-11-25 17:07:01,082 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-25 17:07:01,083 INFO  L495      AbstractCegarLoop]: Abstraction has 1524 states and 1844 transitions.
[2022-11-25 17:07:01,087 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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)
[2022-11-25 17:07:01,088 INFO  L276                IsEmpty]: Start isEmpty. Operand 1524 states and 1844 transitions.
[2022-11-25 17:07:01,094 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 237
[2022-11-25 17:07:01,095 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-25 17:07:01,095 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-25 17:07:01,096 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2022-11-25 17:07:01,098 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-25 17:07:01,098 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-25 17:07:01,099 INFO  L85        PathProgramCache]: Analyzing trace with hash -845047207, now seen corresponding path program 1 times
[2022-11-25 17:07:01,106 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-25 17:07:01,106 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027186180]
[2022-11-25 17:07:01,106 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:07:01,107 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-25 17:07:01,222 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:07:01,468 INFO  L134       CoverageAnalysis]: Checked inductivity of 172 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked.
[2022-11-25 17:07:01,469 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-25 17:07:01,469 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027186180]
[2022-11-25 17:07:01,469 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027186180] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-25 17:07:01,469 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-25 17:07:01,470 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-11-25 17:07:01,470 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056623638]
[2022-11-25 17:07:01,470 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-25 17:07:01,471 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-25 17:07:01,471 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-25 17:07:01,472 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-25 17:07:01,472 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-25 17:07:01,473 INFO  L87              Difference]: Start difference. First operand 1524 states and 1844 transitions. Second operand  has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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)
[2022-11-25 17:07:02,826 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-25 17:07:02,826 INFO  L93              Difference]: Finished difference Result 3603 states and 4427 transitions.
[2022-11-25 17:07:02,827 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-25 17:07:02,827 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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 236
[2022-11-25 17:07:02,828 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-25 17:07:02,837 INFO  L225             Difference]: With dead ends: 3603
[2022-11-25 17:07:02,838 INFO  L226             Difference]: Without dead ends: 2265
[2022-11-25 17:07:02,840 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
[2022-11-25 17:07:02,842 INFO  L413           NwaCegarLoop]: 366 mSDtfsCounter, 143 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time
[2022-11-25 17:07:02,843 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 386 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time]
[2022-11-25 17:07:02,848 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2265 states.
[2022-11-25 17:07:02,891 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 2076.
[2022-11-25 17:07:02,895 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2076 states, 2075 states have (on average 1.192289156626506) internal successors, (2474), 2075 states have internal predecessors, (2474), 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)
[2022-11-25 17:07:02,902 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 2474 transitions.
[2022-11-25 17:07:02,902 INFO  L78                 Accepts]: Start accepts. Automaton has 2076 states and 2474 transitions. Word has length 236
[2022-11-25 17:07:02,904 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-25 17:07:02,904 INFO  L495      AbstractCegarLoop]: Abstraction has 2076 states and 2474 transitions.
[2022-11-25 17:07:02,904 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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)
[2022-11-25 17:07:02,905 INFO  L276                IsEmpty]: Start isEmpty. Operand 2076 states and 2474 transitions.
[2022-11-25 17:07:02,912 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 243
[2022-11-25 17:07:02,913 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-25 17:07:02,913 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-25 17:07:02,913 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2022-11-25 17:07:02,914 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-25 17:07:02,914 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-25 17:07:02,915 INFO  L85        PathProgramCache]: Analyzing trace with hash 1327280490, now seen corresponding path program 1 times
[2022-11-25 17:07:02,915 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-25 17:07:02,916 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719605499]
[2022-11-25 17:07:02,916 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:07:02,916 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-25 17:07:03,018 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:07:03,280 INFO  L134       CoverageAnalysis]: Checked inductivity of 178 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked.
[2022-11-25 17:07:03,281 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-25 17:07:03,281 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719605499]
[2022-11-25 17:07:03,281 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719605499] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-25 17:07:03,281 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-25 17:07:03,282 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-11-25 17:07:03,282 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821152739]
[2022-11-25 17:07:03,282 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-25 17:07:03,283 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-25 17:07:03,283 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-25 17:07:03,284 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-25 17:07:03,284 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-25 17:07:03,284 INFO  L87              Difference]: Start difference. First operand 2076 states and 2474 transitions. Second operand  has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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)
[2022-11-25 17:07:04,674 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-25 17:07:04,674 INFO  L93              Difference]: Finished difference Result 4890 states and 5877 transitions.
[2022-11-25 17:07:04,675 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-25 17:07:04,675 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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 242
[2022-11-25 17:07:04,676 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-25 17:07:04,686 INFO  L225             Difference]: With dead ends: 4890
[2022-11-25 17:07:04,687 INFO  L226             Difference]: Without dead ends: 2816
[2022-11-25 17:07:04,690 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
[2022-11-25 17:07:04,691 INFO  L413           NwaCegarLoop]: 365 mSDtfsCounter, 142 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time
[2022-11-25 17:07:04,692 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 387 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time]
[2022-11-25 17:07:04,696 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2816 states.
[2022-11-25 17:07:04,748 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2816 to 2811.
[2022-11-25 17:07:04,754 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2811 states, 2810 states have (on average 1.1736654804270463) internal successors, (3298), 2810 states have internal predecessors, (3298), 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)
[2022-11-25 17:07:04,762 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2811 states to 2811 states and 3298 transitions.
[2022-11-25 17:07:04,763 INFO  L78                 Accepts]: Start accepts. Automaton has 2811 states and 3298 transitions. Word has length 242
[2022-11-25 17:07:04,763 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-25 17:07:04,763 INFO  L495      AbstractCegarLoop]: Abstraction has 2811 states and 3298 transitions.
[2022-11-25 17:07:04,764 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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)
[2022-11-25 17:07:04,764 INFO  L276                IsEmpty]: Start isEmpty. Operand 2811 states and 3298 transitions.
[2022-11-25 17:07:04,772 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 282
[2022-11-25 17:07:04,772 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-25 17:07:04,773 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-25 17:07:04,773 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2022-11-25 17:07:04,773 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-25 17:07:04,774 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-25 17:07:04,774 INFO  L85        PathProgramCache]: Analyzing trace with hash 1752037152, now seen corresponding path program 1 times
[2022-11-25 17:07:04,774 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-25 17:07:04,775 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502331647]
[2022-11-25 17:07:04,775 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:07:04,775 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-25 17:07:04,891 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:07:05,356 INFO  L134       CoverageAnalysis]: Checked inductivity of 202 backedges. 202 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-25 17:07:05,357 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-25 17:07:05,357 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502331647]
[2022-11-25 17:07:05,358 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502331647] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-25 17:07:05,358 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-25 17:07:05,358 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-11-25 17:07:05,359 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883798603]
[2022-11-25 17:07:05,359 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-25 17:07:05,360 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-11-25 17:07:05,360 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-25 17:07:05,361 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-11-25 17:07:05,361 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-25 17:07:05,362 INFO  L87              Difference]: Start difference. First operand 2811 states and 3298 transitions. Second operand  has 4 states, 4 states have (on average 70.25) internal successors, (281), 3 states have internal predecessors, (281), 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)
[2022-11-25 17:07:07,418 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-25 17:07:07,418 INFO  L93              Difference]: Finished difference Result 8956 states and 10588 transitions.
[2022-11-25 17:07:07,419 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-11-25 17:07:07,420 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 70.25) internal successors, (281), 3 states have internal predecessors, (281), 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 281
[2022-11-25 17:07:07,420 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-25 17:07:07,444 INFO  L225             Difference]: With dead ends: 8956
[2022-11-25 17:07:07,444 INFO  L226             Difference]: Without dead ends: 6147
[2022-11-25 17:07:07,449 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
[2022-11-25 17:07:07,450 INFO  L413           NwaCegarLoop]: 37 mSDtfsCounter, 284 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time
[2022-11-25 17:07:07,451 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 78 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time]
[2022-11-25 17:07:07,459 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6147 states.
[2022-11-25 17:07:07,577 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6147 to 5961.
[2022-11-25 17:07:07,588 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5961 states, 5960 states have (on average 1.1758389261744966) internal successors, (7008), 5960 states have internal predecessors, (7008), 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)
[2022-11-25 17:07:07,651 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5961 states to 5961 states and 7008 transitions.
[2022-11-25 17:07:07,653 INFO  L78                 Accepts]: Start accepts. Automaton has 5961 states and 7008 transitions. Word has length 281
[2022-11-25 17:07:07,654 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-25 17:07:07,654 INFO  L495      AbstractCegarLoop]: Abstraction has 5961 states and 7008 transitions.
[2022-11-25 17:07:07,655 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 70.25) internal successors, (281), 3 states have internal predecessors, (281), 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)
[2022-11-25 17:07:07,655 INFO  L276                IsEmpty]: Start isEmpty. Operand 5961 states and 7008 transitions.
[2022-11-25 17:07:07,667 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 320
[2022-11-25 17:07:07,667 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-25 17:07:07,670 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-25 17:07:07,670 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2022-11-25 17:07:07,671 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-25 17:07:07,671 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-25 17:07:07,672 INFO  L85        PathProgramCache]: Analyzing trace with hash -1184279150, now seen corresponding path program 1 times
[2022-11-25 17:07:07,672 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-25 17:07:07,672 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402823229]
[2022-11-25 17:07:07,672 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:07:07,673 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-25 17:07:07,776 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:07:08,055 INFO  L134       CoverageAnalysis]: Checked inductivity of 376 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked.
[2022-11-25 17:07:08,055 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-25 17:07:08,056 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402823229]
[2022-11-25 17:07:08,056 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402823229] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-25 17:07:08,056 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-25 17:07:08,056 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-11-25 17:07:08,056 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519905077]
[2022-11-25 17:07:08,057 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-25 17:07:08,058 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-25 17:07:08,058 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-25 17:07:08,059 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-25 17:07:08,059 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-25 17:07:08,060 INFO  L87              Difference]: Start difference. First operand 5961 states and 7008 transitions. Second operand  has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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)
[2022-11-25 17:07:09,140 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-25 17:07:09,140 INFO  L93              Difference]: Finished difference Result 12099 states and 14259 transitions.
[2022-11-25 17:07:09,141 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-25 17:07:09,141 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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 319
[2022-11-25 17:07:09,142 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-25 17:07:09,169 INFO  L225             Difference]: With dead ends: 12099
[2022-11-25 17:07:09,169 INFO  L226             Difference]: Without dead ends: 7248
[2022-11-25 17:07:09,175 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
[2022-11-25 17:07:09,178 INFO  L413           NwaCegarLoop]: 122 mSDtfsCounter, 168 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time
[2022-11-25 17:07:09,179 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 146 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time]
[2022-11-25 17:07:09,187 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7248 states.
[2022-11-25 17:07:09,288 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7248 to 4664.
[2022-11-25 17:07:09,296 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4664 states, 4663 states have (on average 1.1799270855672315) internal successors, (5502), 4663 states have internal predecessors, (5502), 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)
[2022-11-25 17:07:09,306 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4664 states to 4664 states and 5502 transitions.
[2022-11-25 17:07:09,307 INFO  L78                 Accepts]: Start accepts. Automaton has 4664 states and 5502 transitions. Word has length 319
[2022-11-25 17:07:09,307 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-25 17:07:09,308 INFO  L495      AbstractCegarLoop]: Abstraction has 4664 states and 5502 transitions.
[2022-11-25 17:07:09,308 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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)
[2022-11-25 17:07:09,308 INFO  L276                IsEmpty]: Start isEmpty. Operand 4664 states and 5502 transitions.
[2022-11-25 17:07:09,318 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 329
[2022-11-25 17:07:09,319 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-25 17:07:09,320 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-25 17:07:09,321 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8
[2022-11-25 17:07:09,321 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-25 17:07:09,333 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-25 17:07:09,333 INFO  L85        PathProgramCache]: Analyzing trace with hash 1130496183, now seen corresponding path program 1 times
[2022-11-25 17:07:09,334 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-25 17:07:09,334 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006954260]
[2022-11-25 17:07:09,334 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:07:09,334 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-25 17:07:09,432 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:07:10,495 INFO  L134       CoverageAnalysis]: Checked inductivity of 214 backedges. 171 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-25 17:07:10,496 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-25 17:07:10,496 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006954260]
[2022-11-25 17:07:10,496 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006954260] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-25 17:07:10,497 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309881835]
[2022-11-25 17:07:10,497 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:07:10,497 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-25 17:07:10,497 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3
[2022-11-25 17:07:10,502 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-25 17:07:10,510 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-11-25 17:07:10,815 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:07:10,826 INFO  L263         TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 13 conjunts are in the unsatisfiable core
[2022-11-25 17:07:10,844 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-25 17:07:13,339 INFO  L134       CoverageAnalysis]: Checked inductivity of 214 backedges. 171 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-25 17:07:13,339 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-11-25 17:07:16,349 INFO  L134       CoverageAnalysis]: Checked inductivity of 214 backedges. 171 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-25 17:07:16,351 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309881835] provided 0 perfect and 2 imperfect interpolant sequences
[2022-11-25 17:07:16,351 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-11-25 17:07:16,352 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7
[2022-11-25 17:07:16,352 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172064319]
[2022-11-25 17:07:16,352 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-11-25 17:07:16,354 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-11-25 17:07:16,354 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-25 17:07:16,355 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-11-25 17:07:16,356 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56
[2022-11-25 17:07:16,356 INFO  L87              Difference]: Start difference. First operand 4664 states and 5502 transitions. Second operand  has 8 states, 8 states have (on average 72.5) internal successors, (580), 7 states have internal predecessors, (580), 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)
[2022-11-25 17:07:20,560 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-25 17:07:20,560 INFO  L93              Difference]: Finished difference Result 12185 states and 14338 transitions.
[2022-11-25 17:07:20,562 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2022-11-25 17:07:20,563 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 72.5) internal successors, (580), 7 states have internal predecessors, (580), 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 328
[2022-11-25 17:07:20,563 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-25 17:07:20,590 INFO  L225             Difference]: With dead ends: 12185
[2022-11-25 17:07:20,590 INFO  L226             Difference]: Without dead ends: 7891
[2022-11-25 17:07:20,597 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 665 GetRequests, 651 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210
[2022-11-25 17:07:20,598 INFO  L413           NwaCegarLoop]: 102 mSDtfsCounter, 1038 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2345 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1038 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 2751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 2345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time
[2022-11-25 17:07:20,598 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1038 Valid, 185 Invalid, 2751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 2345 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time]
[2022-11-25 17:07:20,609 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7891 states.
[2022-11-25 17:07:20,752 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7891 to 4477.
[2022-11-25 17:07:20,761 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4477 states, 4476 states have (on average 1.1735924932975872) internal successors, (5253), 4476 states have internal predecessors, (5253), 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)
[2022-11-25 17:07:20,773 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4477 states to 4477 states and 5253 transitions.
[2022-11-25 17:07:20,774 INFO  L78                 Accepts]: Start accepts. Automaton has 4477 states and 5253 transitions. Word has length 328
[2022-11-25 17:07:20,774 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-25 17:07:20,775 INFO  L495      AbstractCegarLoop]: Abstraction has 4477 states and 5253 transitions.
[2022-11-25 17:07:20,775 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 72.5) internal successors, (580), 7 states have internal predecessors, (580), 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)
[2022-11-25 17:07:20,776 INFO  L276                IsEmpty]: Start isEmpty. Operand 4477 states and 5253 transitions.
[2022-11-25 17:07:20,791 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 349
[2022-11-25 17:07:20,791 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-25 17:07:20,792 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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]
[2022-11-25 17:07:20,806 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-11-25 17:07:20,999 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2022-11-25 17:07:21,000 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-25 17:07:21,000 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-25 17:07:21,001 INFO  L85        PathProgramCache]: Analyzing trace with hash -1345956964, now seen corresponding path program 1 times
[2022-11-25 17:07:21,001 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-25 17:07:21,001 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171056220]
[2022-11-25 17:07:21,001 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:07:21,001 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-25 17:07:21,139 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:07:22,791 INFO  L134       CoverageAnalysis]: Checked inductivity of 417 backedges. 188 proven. 148 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked.
[2022-11-25 17:07:22,791 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-25 17:07:22,792 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171056220]
[2022-11-25 17:07:22,792 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171056220] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-25 17:07:22,792 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720194572]
[2022-11-25 17:07:22,792 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:07:22,793 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-25 17:07:22,793 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3
[2022-11-25 17:07:22,795 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-25 17:07:22,842 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-11-25 17:07:23,055 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:07:23,058 INFO  L263         TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 3 conjunts are in the unsatisfiable core
[2022-11-25 17:07:23,075 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-25 17:07:23,296 INFO  L134       CoverageAnalysis]: Checked inductivity of 417 backedges. 336 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked.
[2022-11-25 17:07:23,296 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-11-25 17:07:23,297 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720194572] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-25 17:07:23,297 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2022-11-25 17:07:23,297 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9
[2022-11-25 17:07:23,298 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538677388]
[2022-11-25 17:07:23,298 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-25 17:07:23,299 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-25 17:07:23,299 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-25 17:07:23,300 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-25 17:07:23,300 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72
[2022-11-25 17:07:23,300 INFO  L87              Difference]: Start difference. First operand 4477 states and 5253 transitions. Second operand  has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 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)
[2022-11-25 17:07:24,476 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-25 17:07:24,476 INFO  L93              Difference]: Finished difference Result 8778 states and 10330 transitions.
[2022-11-25 17:07:24,477 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-25 17:07:24,477 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 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 348
[2022-11-25 17:07:24,478 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-25 17:07:24,497 INFO  L225             Difference]: With dead ends: 8778
[2022-11-25 17:07:24,497 INFO  L226             Difference]: Without dead ends: 4671
[2022-11-25 17:07:24,502 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72
[2022-11-25 17:07:24,503 INFO  L413           NwaCegarLoop]: 306 mSDtfsCounter, 103 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time
[2022-11-25 17:07:24,504 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 324 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time]
[2022-11-25 17:07:24,510 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4671 states.
[2022-11-25 17:07:24,589 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4671 to 4477.
[2022-11-25 17:07:24,606 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4477 states, 4476 states have (on average 1.1427613941018766) internal successors, (5115), 4476 states have internal predecessors, (5115), 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)
[2022-11-25 17:07:24,614 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4477 states to 4477 states and 5115 transitions.
[2022-11-25 17:07:24,615 INFO  L78                 Accepts]: Start accepts. Automaton has 4477 states and 5115 transitions. Word has length 348
[2022-11-25 17:07:24,615 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-25 17:07:24,616 INFO  L495      AbstractCegarLoop]: Abstraction has 4477 states and 5115 transitions.
[2022-11-25 17:07:24,617 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 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)
[2022-11-25 17:07:24,617 INFO  L276                IsEmpty]: Start isEmpty. Operand 4477 states and 5115 transitions.
[2022-11-25 17:07:24,624 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 357
[2022-11-25 17:07:24,624 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-25 17:07:24,625 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-25 17:07:24,638 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2022-11-25 17:07:24,832 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10
[2022-11-25 17:07:24,832 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-25 17:07:24,833 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-25 17:07:24,833 INFO  L85        PathProgramCache]: Analyzing trace with hash -87231958, now seen corresponding path program 1 times
[2022-11-25 17:07:24,833 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-25 17:07:24,833 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703888170]
[2022-11-25 17:07:24,833 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:07:24,833 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-25 17:07:24,951 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:07:25,407 INFO  L134       CoverageAnalysis]: Checked inductivity of 227 backedges. 227 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-25 17:07:25,407 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-25 17:07:25,408 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703888170]
[2022-11-25 17:07:25,408 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703888170] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-25 17:07:25,408 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-25 17:07:25,408 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-11-25 17:07:25,408 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892973873]
[2022-11-25 17:07:25,409 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-25 17:07:25,409 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-25 17:07:25,410 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-25 17:07:25,411 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-25 17:07:25,411 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-25 17:07:25,412 INFO  L87              Difference]: Start difference. First operand 4477 states and 5115 transitions. Second operand  has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 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)
[2022-11-25 17:07:26,673 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-25 17:07:26,673 INFO  L93              Difference]: Finished difference Result 11713 states and 13473 transitions.
[2022-11-25 17:07:26,674 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-25 17:07:26,674 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 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 356
[2022-11-25 17:07:26,675 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-25 17:07:26,690 INFO  L225             Difference]: With dead ends: 11713
[2022-11-25 17:07:26,691 INFO  L226             Difference]: Without dead ends: 7606
[2022-11-25 17:07:26,696 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
[2022-11-25 17:07:26,697 INFO  L413           NwaCegarLoop]: 63 mSDtfsCounter, 57 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time
[2022-11-25 17:07:26,697 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 70 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time]
[2022-11-25 17:07:26,707 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7606 states.
[2022-11-25 17:07:26,820 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7606 to 7601.
[2022-11-25 17:07:26,831 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7601 states, 7600 states have (on average 1.137763157894737) internal successors, (8647), 7600 states have internal predecessors, (8647), 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)
[2022-11-25 17:07:26,846 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7601 states to 7601 states and 8647 transitions.
[2022-11-25 17:07:26,846 INFO  L78                 Accepts]: Start accepts. Automaton has 7601 states and 8647 transitions. Word has length 356
[2022-11-25 17:07:26,847 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-25 17:07:26,847 INFO  L495      AbstractCegarLoop]: Abstraction has 7601 states and 8647 transitions.
[2022-11-25 17:07:26,848 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 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)
[2022-11-25 17:07:26,848 INFO  L276                IsEmpty]: Start isEmpty. Operand 7601 states and 8647 transitions.
[2022-11-25 17:07:26,857 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 360
[2022-11-25 17:07:26,857 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-25 17:07:26,858 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-25 17:07:26,858 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11
[2022-11-25 17:07:26,858 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-25 17:07:26,859 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-25 17:07:26,859 INFO  L85        PathProgramCache]: Analyzing trace with hash -2000820814, now seen corresponding path program 1 times
[2022-11-25 17:07:26,860 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-25 17:07:26,860 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477670416]
[2022-11-25 17:07:26,860 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:07:26,860 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-25 17:07:26,996 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:07:28,173 INFO  L134       CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked.
[2022-11-25 17:07:28,173 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-25 17:07:28,174 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477670416]
[2022-11-25 17:07:28,174 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477670416] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-25 17:07:28,174 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742719455]
[2022-11-25 17:07:28,174 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:07:28,174 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-25 17:07:28,175 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3
[2022-11-25 17:07:28,176 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-25 17:07:28,195 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-11-25 17:07:28,407 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:07:28,410 INFO  L263         TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 3 conjunts are in the unsatisfiable core
[2022-11-25 17:07:28,421 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-25 17:07:29,545 INFO  L134       CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked.
[2022-11-25 17:07:29,545 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-11-25 17:07:29,970 INFO  L134       CoverageAnalysis]: Checked inductivity of 245 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked.
[2022-11-25 17:07:29,971 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742719455] provided 1 perfect and 1 imperfect interpolant sequences
[2022-11-25 17:07:29,971 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences.
[2022-11-25 17:07:29,971 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5
[2022-11-25 17:07:29,972 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940153505]
[2022-11-25 17:07:29,972 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-25 17:07:29,973 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-25 17:07:29,973 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-25 17:07:29,974 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-25 17:07:29,974 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2022-11-25 17:07:29,974 INFO  L87              Difference]: Start difference. First operand 7601 states and 8647 transitions. Second operand  has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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)
[2022-11-25 17:07:31,321 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-25 17:07:31,321 INFO  L93              Difference]: Finished difference Result 17036 states and 19446 transitions.
[2022-11-25 17:07:31,326 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-25 17:07:31,327 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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 359
[2022-11-25 17:07:31,328 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-25 17:07:31,347 INFO  L225             Difference]: With dead ends: 17036
[2022-11-25 17:07:31,347 INFO  L226             Difference]: Without dead ends: 9805
[2022-11-25 17:07:31,353 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 715 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2022-11-25 17:07:31,355 INFO  L413           NwaCegarLoop]: 102 mSDtfsCounter, 174 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time
[2022-11-25 17:07:31,355 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 119 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time]
[2022-11-25 17:07:31,367 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9805 states.
[2022-11-25 17:07:31,501 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9805 to 7964.
[2022-11-25 17:07:31,513 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7964 states, 7963 states have (on average 1.1312319477583825) internal successors, (9008), 7963 states have internal predecessors, (9008), 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)
[2022-11-25 17:07:31,528 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7964 states to 7964 states and 9008 transitions.
[2022-11-25 17:07:31,529 INFO  L78                 Accepts]: Start accepts. Automaton has 7964 states and 9008 transitions. Word has length 359
[2022-11-25 17:07:31,529 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-25 17:07:31,530 INFO  L495      AbstractCegarLoop]: Abstraction has 7964 states and 9008 transitions.
[2022-11-25 17:07:31,530 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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)
[2022-11-25 17:07:31,530 INFO  L276                IsEmpty]: Start isEmpty. Operand 7964 states and 9008 transitions.
[2022-11-25 17:07:31,544 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 447
[2022-11-25 17:07:31,544 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-25 17:07:31,545 INFO  L195           NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-25 17:07:31,552 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2022-11-25 17:07:31,751 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12
[2022-11-25 17:07:31,752 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-25 17:07:31,752 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-25 17:07:31,752 INFO  L85        PathProgramCache]: Analyzing trace with hash -1108276798, now seen corresponding path program 1 times
[2022-11-25 17:07:31,752 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-25 17:07:31,752 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559452437]
[2022-11-25 17:07:31,752 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:07:31,753 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-25 17:07:31,886 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:07:32,163 INFO  L134       CoverageAnalysis]: Checked inductivity of 746 backedges. 486 proven. 0 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked.
[2022-11-25 17:07:32,163 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-25 17:07:32,163 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559452437]
[2022-11-25 17:07:32,164 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559452437] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-25 17:07:32,164 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-25 17:07:32,164 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-11-25 17:07:32,164 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820329085]
[2022-11-25 17:07:32,165 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-25 17:07:32,165 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-25 17:07:32,166 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-25 17:07:32,167 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-25 17:07:32,167 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-25 17:07:32,167 INFO  L87              Difference]: Start difference. First operand 7964 states and 9008 transitions. Second operand  has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 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)
[2022-11-25 17:07:33,351 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-25 17:07:33,351 INFO  L93              Difference]: Finished difference Result 17029 states and 19297 transitions.
[2022-11-25 17:07:33,352 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-25 17:07:33,352 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 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 446
[2022-11-25 17:07:33,353 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-25 17:07:33,371 INFO  L225             Difference]: With dead ends: 17029
[2022-11-25 17:07:33,371 INFO  L226             Difference]: Without dead ends: 9435
[2022-11-25 17:07:33,378 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
[2022-11-25 17:07:33,379 INFO  L413           NwaCegarLoop]: 303 mSDtfsCounter, 101 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time
[2022-11-25 17:07:33,380 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 322 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time]
[2022-11-25 17:07:33,392 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9435 states.
[2022-11-25 17:07:33,557 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9435 to 7587.
[2022-11-25 17:07:33,566 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7587 states, 7586 states have (on average 1.119825995254416) internal successors, (8495), 7586 states have internal predecessors, (8495), 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)
[2022-11-25 17:07:33,579 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7587 states to 7587 states and 8495 transitions.
[2022-11-25 17:07:33,580 INFO  L78                 Accepts]: Start accepts. Automaton has 7587 states and 8495 transitions. Word has length 446
[2022-11-25 17:07:33,580 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-25 17:07:33,581 INFO  L495      AbstractCegarLoop]: Abstraction has 7587 states and 8495 transitions.
[2022-11-25 17:07:33,581 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 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)
[2022-11-25 17:07:33,581 INFO  L276                IsEmpty]: Start isEmpty. Operand 7587 states and 8495 transitions.
[2022-11-25 17:07:33,594 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 481
[2022-11-25 17:07:33,594 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-25 17:07:33,596 INFO  L195           NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-25 17:07:33,596 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13
[2022-11-25 17:07:33,597 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-25 17:07:33,597 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-25 17:07:33,597 INFO  L85        PathProgramCache]: Analyzing trace with hash -1480841082, now seen corresponding path program 1 times
[2022-11-25 17:07:33,598 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-25 17:07:33,598 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835575079]
[2022-11-25 17:07:33,598 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:07:33,598 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-25 17:07:33,716 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:07:34,464 INFO  L134       CoverageAnalysis]: Checked inductivity of 762 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked.
[2022-11-25 17:07:34,465 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-25 17:07:34,465 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835575079]
[2022-11-25 17:07:34,465 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835575079] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-25 17:07:34,465 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-25 17:07:34,466 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-11-25 17:07:34,466 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051375624]
[2022-11-25 17:07:34,466 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-25 17:07:34,467 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-25 17:07:34,468 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-25 17:07:34,469 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-25 17:07:34,469 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-25 17:07:34,469 INFO  L87              Difference]: Start difference. First operand 7587 states and 8495 transitions. Second operand  has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 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)
[2022-11-25 17:07:35,641 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-25 17:07:35,641 INFO  L93              Difference]: Finished difference Result 15359 states and 17218 transitions.
[2022-11-25 17:07:35,641 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-25 17:07:35,642 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 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 480
[2022-11-25 17:07:35,643 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-25 17:07:35,657 INFO  L225             Difference]: With dead ends: 15359
[2022-11-25 17:07:35,657 INFO  L226             Difference]: Without dead ends: 7958
[2022-11-25 17:07:35,664 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
[2022-11-25 17:07:35,665 INFO  L413           NwaCegarLoop]: 153 mSDtfsCounter, 89 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time
[2022-11-25 17:07:35,665 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 172 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time]
[2022-11-25 17:07:35,674 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7958 states.
[2022-11-25 17:07:35,791 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7958 to 7955.
[2022-11-25 17:07:35,799 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7955 states, 7954 states have (on average 1.1079959768669851) internal successors, (8813), 7954 states have internal predecessors, (8813), 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)
[2022-11-25 17:07:35,813 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7955 states to 7955 states and 8813 transitions.
[2022-11-25 17:07:35,814 INFO  L78                 Accepts]: Start accepts. Automaton has 7955 states and 8813 transitions. Word has length 480
[2022-11-25 17:07:35,815 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-25 17:07:35,815 INFO  L495      AbstractCegarLoop]: Abstraction has 7955 states and 8813 transitions.
[2022-11-25 17:07:35,815 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 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)
[2022-11-25 17:07:35,815 INFO  L276                IsEmpty]: Start isEmpty. Operand 7955 states and 8813 transitions.
[2022-11-25 17:07:35,828 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 482
[2022-11-25 17:07:35,828 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-25 17:07:35,829 INFO  L195           NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-25 17:07:35,829 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14
[2022-11-25 17:07:35,829 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-25 17:07:35,830 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-25 17:07:35,830 INFO  L85        PathProgramCache]: Analyzing trace with hash -380186503, now seen corresponding path program 1 times
[2022-11-25 17:07:35,830 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-25 17:07:35,830 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041242624]
[2022-11-25 17:07:35,831 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:07:35,831 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-25 17:07:35,945 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:07:36,567 INFO  L134       CoverageAnalysis]: Checked inductivity of 762 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked.
[2022-11-25 17:07:36,568 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-25 17:07:36,568 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041242624]
[2022-11-25 17:07:36,568 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041242624] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-25 17:07:36,568 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-25 17:07:36,568 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-11-25 17:07:36,569 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828159847]
[2022-11-25 17:07:36,569 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-25 17:07:36,570 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-11-25 17:07:36,570 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-25 17:07:36,571 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-11-25 17:07:36,571 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-25 17:07:36,571 INFO  L87              Difference]: Start difference. First operand 7955 states and 8813 transitions. Second operand  has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 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)
[2022-11-25 17:07:38,222 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-25 17:07:38,223 INFO  L93              Difference]: Finished difference Result 17379 states and 19317 transitions.
[2022-11-25 17:07:38,223 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-11-25 17:07:38,223 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 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 481
[2022-11-25 17:07:38,224 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-25 17:07:38,243 INFO  L225             Difference]: With dead ends: 17379
[2022-11-25 17:07:38,243 INFO  L226             Difference]: Without dead ends: 9794
[2022-11-25 17:07:38,251 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-25 17:07:38,252 INFO  L413           NwaCegarLoop]: 127 mSDtfsCounter, 284 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time
[2022-11-25 17:07:38,252 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 167 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time]
[2022-11-25 17:07:38,261 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9794 states.
[2022-11-25 17:07:38,395 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9794 to 8874.
[2022-11-25 17:07:38,404 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 8874 states, 8873 states have (on average 1.1000788910176942) internal successors, (9761), 8873 states have internal predecessors, (9761), 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)
[2022-11-25 17:07:38,419 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8874 states to 8874 states and 9761 transitions.
[2022-11-25 17:07:38,419 INFO  L78                 Accepts]: Start accepts. Automaton has 8874 states and 9761 transitions. Word has length 481
[2022-11-25 17:07:38,420 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-25 17:07:38,420 INFO  L495      AbstractCegarLoop]: Abstraction has 8874 states and 9761 transitions.
[2022-11-25 17:07:38,421 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 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)
[2022-11-25 17:07:38,421 INFO  L276                IsEmpty]: Start isEmpty. Operand 8874 states and 9761 transitions.
[2022-11-25 17:07:38,434 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 519
[2022-11-25 17:07:38,434 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-25 17:07:38,435 INFO  L195           NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-25 17:07:38,435 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15
[2022-11-25 17:07:38,435 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-25 17:07:38,436 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-25 17:07:38,436 INFO  L85        PathProgramCache]: Analyzing trace with hash -914071402, now seen corresponding path program 1 times
[2022-11-25 17:07:38,436 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-25 17:07:38,436 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720101104]
[2022-11-25 17:07:38,437 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:07:38,437 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-25 17:07:38,567 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:07:39,646 INFO  L134       CoverageAnalysis]: Checked inductivity of 835 backedges. 578 proven. 133 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked.
[2022-11-25 17:07:39,647 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-25 17:07:39,647 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720101104]
[2022-11-25 17:07:39,648 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720101104] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-25 17:07:39,648 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124068133]
[2022-11-25 17:07:39,648 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:07:39,648 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-25 17:07:39,649 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3
[2022-11-25 17:07:39,650 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-25 17:07:39,655 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-11-25 17:07:39,993 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:07:39,997 INFO  L263         TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 2 conjunts are in the unsatisfiable core
[2022-11-25 17:07:40,007 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-25 17:07:40,214 INFO  L134       CoverageAnalysis]: Checked inductivity of 835 backedges. 659 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked.
[2022-11-25 17:07:40,214 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-11-25 17:07:40,214 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124068133] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-25 17:07:40,215 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2022-11-25 17:07:40,215 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7
[2022-11-25 17:07:40,215 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832061228]
[2022-11-25 17:07:40,215 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-25 17:07:40,216 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-25 17:07:40,217 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-25 17:07:40,217 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-25 17:07:40,218 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42
[2022-11-25 17:07:40,218 INFO  L87              Difference]: Start difference. First operand 8874 states and 9761 transitions. Second operand  has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 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)
[2022-11-25 17:07:41,251 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-25 17:07:41,251 INFO  L93              Difference]: Finished difference Result 18305 states and 20183 transitions.
[2022-11-25 17:07:41,252 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-25 17:07:41,252 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 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 518
[2022-11-25 17:07:41,252 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-25 17:07:41,270 INFO  L225             Difference]: With dead ends: 18305
[2022-11-25 17:07:41,270 INFO  L226             Difference]: Without dead ends: 9801
[2022-11-25 17:07:41,278 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42
[2022-11-25 17:07:41,278 INFO  L413           NwaCegarLoop]: 310 mSDtfsCounter, 93 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time
[2022-11-25 17:07:41,279 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 329 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time]
[2022-11-25 17:07:41,289 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9801 states.
[2022-11-25 17:07:41,428 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9801 to 9610.
[2022-11-25 17:07:41,437 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9610 states, 9609 states have (on average 1.0999063378083047) internal successors, (10569), 9609 states have internal predecessors, (10569), 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)
[2022-11-25 17:07:41,454 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9610 states to 9610 states and 10569 transitions.
[2022-11-25 17:07:41,454 INFO  L78                 Accepts]: Start accepts. Automaton has 9610 states and 10569 transitions. Word has length 518
[2022-11-25 17:07:41,455 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-25 17:07:41,455 INFO  L495      AbstractCegarLoop]: Abstraction has 9610 states and 10569 transitions.
[2022-11-25 17:07:41,456 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 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)
[2022-11-25 17:07:41,456 INFO  L276                IsEmpty]: Start isEmpty. Operand 9610 states and 10569 transitions.
[2022-11-25 17:07:41,471 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 573
[2022-11-25 17:07:41,471 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-25 17:07:41,472 INFO  L195           NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-25 17:07:41,485 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2022-11-25 17:07:41,679 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16
[2022-11-25 17:07:41,680 INFO  L420      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-25 17:07:41,680 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-25 17:07:41,680 INFO  L85        PathProgramCache]: Analyzing trace with hash 978702432, now seen corresponding path program 1 times
[2022-11-25 17:07:41,681 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-25 17:07:41,681 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653918228]
[2022-11-25 17:07:41,681 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:07:41,681 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-25 17:07:41,794 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:07:42,583 INFO  L134       CoverageAnalysis]: Checked inductivity of 853 backedges. 659 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked.
[2022-11-25 17:07:42,585 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-25 17:07:42,588 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653918228]
[2022-11-25 17:07:42,588 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653918228] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-25 17:07:42,589 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-25 17:07:42,589 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-11-25 17:07:42,589 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693403769]
[2022-11-25 17:07:42,589 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-25 17:07:42,592 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-25 17:07:42,592 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-25 17:07:42,594 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-25 17:07:42,595 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-25 17:07:42,595 INFO  L87              Difference]: Start difference. First operand 9610 states and 10569 transitions. Second operand  has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 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)
[2022-11-25 17:07:43,827 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-25 17:07:43,827 INFO  L93              Difference]: Finished difference Result 20509 states and 22627 transitions.
[2022-11-25 17:07:43,828 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-25 17:07:43,828 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 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 572
[2022-11-25 17:07:43,831 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-25 17:07:43,851 INFO  L225             Difference]: With dead ends: 20509
[2022-11-25 17:07:43,851 INFO  L226             Difference]: Without dead ends: 11269
[2022-11-25 17:07:43,859 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
[2022-11-25 17:07:43,862 INFO  L413           NwaCegarLoop]: 69 mSDtfsCounter, 120 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time
[2022-11-25 17:07:43,862 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 73 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time]
[2022-11-25 17:07:43,873 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11269 states.
[2022-11-25 17:07:44,025 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11269 to 9426.
[2022-11-25 17:07:44,035 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9426 states, 9425 states have (on average 1.0980371352785145) internal successors, (10349), 9425 states have internal predecessors, (10349), 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)
[2022-11-25 17:07:44,052 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9426 states to 9426 states and 10349 transitions.
[2022-11-25 17:07:44,053 INFO  L78                 Accepts]: Start accepts. Automaton has 9426 states and 10349 transitions. Word has length 572
[2022-11-25 17:07:44,053 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-25 17:07:44,053 INFO  L495      AbstractCegarLoop]: Abstraction has 9426 states and 10349 transitions.
[2022-11-25 17:07:44,055 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 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)
[2022-11-25 17:07:44,055 INFO  L276                IsEmpty]: Start isEmpty. Operand 9426 states and 10349 transitions.
[2022-11-25 17:07:44,076 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 683
[2022-11-25 17:07:44,076 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-25 17:07:44,077 INFO  L195           NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 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]
[2022-11-25 17:07:44,077 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17
[2022-11-25 17:07:44,077 INFO  L420      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-25 17:07:44,078 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-25 17:07:44,078 INFO  L85        PathProgramCache]: Analyzing trace with hash 47691538, now seen corresponding path program 1 times
[2022-11-25 17:07:44,078 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-25 17:07:44,078 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281715726]
[2022-11-25 17:07:44,079 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:07:44,079 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-25 17:07:44,265 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:07:45,227 INFO  L134       CoverageAnalysis]: Checked inductivity of 1718 backedges. 1189 proven. 0 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked.
[2022-11-25 17:07:45,227 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-25 17:07:45,227 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281715726]
[2022-11-25 17:07:45,228 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281715726] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-25 17:07:45,228 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-25 17:07:45,229 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-11-25 17:07:45,229 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000555483]
[2022-11-25 17:07:45,230 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-25 17:07:45,233 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-11-25 17:07:45,233 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-25 17:07:45,234 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-11-25 17:07:45,234 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-25 17:07:45,235 INFO  L87              Difference]: Start difference. First operand 9426 states and 10349 transitions. Second operand  has 4 states, 4 states have (on average 89.25) internal successors, (357), 3 states have internal predecessors, (357), 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)
[2022-11-25 17:07:46,932 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-25 17:07:46,932 INFO  L93              Difference]: Finished difference Result 20333 states and 22350 transitions.
[2022-11-25 17:07:46,932 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-11-25 17:07:46,932 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 89.25) internal successors, (357), 3 states have internal predecessors, (357), 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 682
[2022-11-25 17:07:46,933 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-25 17:07:46,951 INFO  L225             Difference]: With dead ends: 20333
[2022-11-25 17:07:46,951 INFO  L226             Difference]: Without dead ends: 11092
[2022-11-25 17:07:46,958 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
[2022-11-25 17:07:46,959 INFO  L413           NwaCegarLoop]: 36 mSDtfsCounter, 205 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time
[2022-11-25 17:07:46,960 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 73 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time]
[2022-11-25 17:07:46,971 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11092 states.
[2022-11-25 17:07:47,103 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11092 to 8506.
[2022-11-25 17:07:47,113 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 8506 states, 8505 states have (on average 1.0979423868312757) internal successors, (9338), 8505 states have internal predecessors, (9338), 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)
[2022-11-25 17:07:47,129 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8506 states to 8506 states and 9338 transitions.
[2022-11-25 17:07:47,129 INFO  L78                 Accepts]: Start accepts. Automaton has 8506 states and 9338 transitions. Word has length 682
[2022-11-25 17:07:47,130 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-25 17:07:47,130 INFO  L495      AbstractCegarLoop]: Abstraction has 8506 states and 9338 transitions.
[2022-11-25 17:07:47,130 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 89.25) internal successors, (357), 3 states have internal predecessors, (357), 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)
[2022-11-25 17:07:47,131 INFO  L276                IsEmpty]: Start isEmpty. Operand 8506 states and 9338 transitions.
[2022-11-25 17:07:47,145 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 775
[2022-11-25 17:07:47,145 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-25 17:07:47,146 INFO  L195           NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-25 17:07:47,146 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18
[2022-11-25 17:07:47,146 INFO  L420      AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-25 17:07:47,147 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-25 17:07:47,147 INFO  L85        PathProgramCache]: Analyzing trace with hash -534851769, now seen corresponding path program 1 times
[2022-11-25 17:07:47,147 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-25 17:07:47,148 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441205819]
[2022-11-25 17:07:47,148 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:07:47,148 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-25 17:07:47,367 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:07:48,341 INFO  L134       CoverageAnalysis]: Checked inductivity of 2242 backedges. 1055 proven. 0 refuted. 0 times theorem prover too weak. 1187 trivial. 0 not checked.
[2022-11-25 17:07:48,341 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-25 17:07:48,341 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441205819]
[2022-11-25 17:07:48,342 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441205819] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-25 17:07:48,342 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-25 17:07:48,342 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-11-25 17:07:48,345 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871619630]
[2022-11-25 17:07:48,345 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-25 17:07:48,349 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-11-25 17:07:48,349 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-25 17:07:48,351 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-11-25 17:07:48,351 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-25 17:07:48,352 INFO  L87              Difference]: Start difference. First operand 8506 states and 9338 transitions. Second operand  has 4 states, 4 states have (on average 86.0) internal successors, (344), 3 states have internal predecessors, (344), 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)
[2022-11-25 17:07:50,255 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-25 17:07:50,255 INFO  L93              Difference]: Finished difference Result 22725 states and 25044 transitions.
[2022-11-25 17:07:50,255 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-11-25 17:07:50,256 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 86.0) internal successors, (344), 3 states have internal predecessors, (344), 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 774
[2022-11-25 17:07:50,256 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-25 17:07:50,277 INFO  L225             Difference]: With dead ends: 22725
[2022-11-25 17:07:50,278 INFO  L226             Difference]: Without dead ends: 14589
[2022-11-25 17:07:50,286 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
[2022-11-25 17:07:50,287 INFO  L413           NwaCegarLoop]: 66 mSDtfsCounter, 236 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time
[2022-11-25 17:07:50,288 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 97 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time]
[2022-11-25 17:07:50,310 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14589 states.
[2022-11-25 17:07:50,524 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14589 to 13665.
[2022-11-25 17:07:50,538 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13665 states, 13664 states have (on average 1.088041569086651) internal successors, (14867), 13664 states have internal predecessors, (14867), 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)
[2022-11-25 17:07:50,562 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13665 states to 13665 states and 14867 transitions.
[2022-11-25 17:07:50,563 INFO  L78                 Accepts]: Start accepts. Automaton has 13665 states and 14867 transitions. Word has length 774
[2022-11-25 17:07:50,563 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-25 17:07:50,563 INFO  L495      AbstractCegarLoop]: Abstraction has 13665 states and 14867 transitions.
[2022-11-25 17:07:50,563 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 86.0) internal successors, (344), 3 states have internal predecessors, (344), 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)
[2022-11-25 17:07:50,564 INFO  L276                IsEmpty]: Start isEmpty. Operand 13665 states and 14867 transitions.
[2022-11-25 17:07:50,585 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 789
[2022-11-25 17:07:50,585 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-25 17:07:50,586 INFO  L195           NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 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]
[2022-11-25 17:07:50,586 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19
[2022-11-25 17:07:50,586 INFO  L420      AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-25 17:07:50,587 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-25 17:07:50,587 INFO  L85        PathProgramCache]: Analyzing trace with hash 542249316, now seen corresponding path program 1 times
[2022-11-25 17:07:50,587 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-25 17:07:50,588 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913527956]
[2022-11-25 17:07:50,588 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:07:50,589 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-25 17:07:50,780 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:07:53,185 INFO  L134       CoverageAnalysis]: Checked inductivity of 2362 backedges. 1107 proven. 336 refuted. 0 times theorem prover too weak. 919 trivial. 0 not checked.
[2022-11-25 17:07:53,185 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-25 17:07:53,185 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913527956]
[2022-11-25 17:07:53,186 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913527956] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-25 17:07:53,186 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004515390]
[2022-11-25 17:07:53,186 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:07:53,186 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-25 17:07:53,187 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3
[2022-11-25 17:07:53,188 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-25 17:07:53,214 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2022-11-25 17:07:53,596 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:07:53,601 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-11-25 17:07:53,612 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-25 17:07:54,463 INFO  L134       CoverageAnalysis]: Checked inductivity of 2362 backedges. 1429 proven. 380 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked.
[2022-11-25 17:07:54,464 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-11-25 17:07:56,434 INFO  L134       CoverageAnalysis]: Checked inductivity of 2362 backedges. 1809 proven. 0 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked.
[2022-11-25 17:07:56,434 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004515390] provided 1 perfect and 1 imperfect interpolant sequences
[2022-11-25 17:07:56,434 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences.
[2022-11-25 17:07:56,435 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 11
[2022-11-25 17:07:56,435 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853915977]
[2022-11-25 17:07:56,436 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-25 17:07:56,437 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-11-25 17:07:56,437 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-25 17:07:56,438 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-11-25 17:07:56,438 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132
[2022-11-25 17:07:56,439 INFO  L87              Difference]: Start difference. First operand 13665 states and 14867 transitions. Second operand  has 5 states, 5 states have (on average 87.8) internal successors, (439), 4 states have internal predecessors, (439), 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)
[2022-11-25 17:07:59,001 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-25 17:07:59,001 INFO  L93              Difference]: Finished difference Result 32855 states and 35805 transitions.
[2022-11-25 17:07:59,002 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-11-25 17:07:59,002 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 87.8) internal successors, (439), 4 states have internal predecessors, (439), 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 788
[2022-11-25 17:07:59,003 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-25 17:07:59,024 INFO  L225             Difference]: With dead ends: 32855
[2022-11-25 17:07:59,025 INFO  L226             Difference]: Without dead ends: 19560
[2022-11-25 17:07:59,036 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 1580 GetRequests, 1570 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132
[2022-11-25 17:07:59,037 INFO  L413           NwaCegarLoop]: 34 mSDtfsCounter, 221 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time
[2022-11-25 17:07:59,037 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 69 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time]
[2022-11-25 17:07:59,059 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19560 states.
[2022-11-25 17:07:59,347 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19560 to 17165.
[2022-11-25 17:07:59,362 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 17165 states, 17164 states have (on average 1.0907131204847356) internal successors, (18721), 17164 states have internal predecessors, (18721), 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)
[2022-11-25 17:07:59,397 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 17165 states to 17165 states and 18721 transitions.
[2022-11-25 17:07:59,398 INFO  L78                 Accepts]: Start accepts. Automaton has 17165 states and 18721 transitions. Word has length 788
[2022-11-25 17:07:59,398 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-25 17:07:59,399 INFO  L495      AbstractCegarLoop]: Abstraction has 17165 states and 18721 transitions.
[2022-11-25 17:07:59,399 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 87.8) internal successors, (439), 4 states have internal predecessors, (439), 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)
[2022-11-25 17:07:59,399 INFO  L276                IsEmpty]: Start isEmpty. Operand 17165 states and 18721 transitions.
[2022-11-25 17:07:59,425 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 887
[2022-11-25 17:07:59,425 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-25 17:07:59,426 INFO  L195           NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-25 17:07:59,440 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2022-11-25 17:07:59,634 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-25 17:07:59,635 INFO  L420      AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-25 17:07:59,635 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-25 17:07:59,635 INFO  L85        PathProgramCache]: Analyzing trace with hash 1151524527, now seen corresponding path program 1 times
[2022-11-25 17:07:59,635 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-25 17:07:59,635 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714650502]
[2022-11-25 17:07:59,636 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:07:59,636 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-25 17:07:59,816 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:08:00,469 INFO  L134       CoverageAnalysis]: Checked inductivity of 2967 backedges. 1261 proven. 0 refuted. 0 times theorem prover too weak. 1706 trivial. 0 not checked.
[2022-11-25 17:08:00,470 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-25 17:08:00,470 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714650502]
[2022-11-25 17:08:00,470 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714650502] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-25 17:08:00,470 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-25 17:08:00,471 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-11-25 17:08:00,471 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353445992]
[2022-11-25 17:08:00,471 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-25 17:08:00,472 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-25 17:08:00,472 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-25 17:08:00,473 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-25 17:08:00,473 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-25 17:08:00,474 INFO  L87              Difference]: Start difference. First operand 17165 states and 18721 transitions. Second operand  has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 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)
[2022-11-25 17:08:01,700 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-25 17:08:01,700 INFO  L93              Difference]: Finished difference Result 36912 states and 40337 transitions.
[2022-11-25 17:08:01,701 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-25 17:08:01,701 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 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 886
[2022-11-25 17:08:01,702 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-25 17:08:01,722 INFO  L225             Difference]: With dead ends: 36912
[2022-11-25 17:08:01,722 INFO  L226             Difference]: Without dead ends: 20117
[2022-11-25 17:08:01,733 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
[2022-11-25 17:08:01,734 INFO  L413           NwaCegarLoop]: 114 mSDtfsCounter, 128 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time
[2022-11-25 17:08:01,735 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 132 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time]
[2022-11-25 17:08:01,756 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20117 states.
[2022-11-25 17:08:02,078 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20117 to 18824.
[2022-11-25 17:08:02,095 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 18824 states, 18823 states have (on average 1.0910588110290602) internal successors, (20537), 18823 states have internal predecessors, (20537), 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)
[2022-11-25 17:08:02,268 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18824 states to 18824 states and 20537 transitions.
[2022-11-25 17:08:02,269 INFO  L78                 Accepts]: Start accepts. Automaton has 18824 states and 20537 transitions. Word has length 886
[2022-11-25 17:08:02,269 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-25 17:08:02,269 INFO  L495      AbstractCegarLoop]: Abstraction has 18824 states and 20537 transitions.
[2022-11-25 17:08:02,270 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 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)
[2022-11-25 17:08:02,270 INFO  L276                IsEmpty]: Start isEmpty. Operand 18824 states and 20537 transitions.
[2022-11-25 17:08:02,319 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 897
[2022-11-25 17:08:02,319 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-25 17:08:02,319 INFO  L195           NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1]
[2022-11-25 17:08:02,320 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21
[2022-11-25 17:08:02,320 INFO  L420      AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-25 17:08:02,321 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-25 17:08:02,321 INFO  L85        PathProgramCache]: Analyzing trace with hash 414037878, now seen corresponding path program 1 times
[2022-11-25 17:08:02,321 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-25 17:08:02,322 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096856983]
[2022-11-25 17:08:02,322 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:08:02,322 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-25 17:08:02,620 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:08:04,303 INFO  L134       CoverageAnalysis]: Checked inductivity of 2987 backedges. 2309 proven. 0 refuted. 0 times theorem prover too weak. 678 trivial. 0 not checked.
[2022-11-25 17:08:04,303 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-25 17:08:04,303 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096856983]
[2022-11-25 17:08:04,304 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096856983] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-25 17:08:04,304 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-25 17:08:04,304 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-11-25 17:08:04,304 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135038253]
[2022-11-25 17:08:04,304 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-25 17:08:04,306 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-11-25 17:08:04,306 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-25 17:08:04,307 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-11-25 17:08:04,307 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-25 17:08:04,307 INFO  L87              Difference]: Start difference. First operand 18824 states and 20537 transitions. Second operand  has 4 states, 4 states have (on average 124.25) internal successors, (497), 4 states have internal predecessors, (497), 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)
[2022-11-25 17:08:06,216 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-25 17:08:06,217 INFO  L93              Difference]: Finished difference Result 42075 states and 45858 transitions.
[2022-11-25 17:08:06,217 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-11-25 17:08:06,217 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 124.25) internal successors, (497), 4 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 896
[2022-11-25 17:08:06,218 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-25 17:08:06,246 INFO  L225             Difference]: With dead ends: 42075
[2022-11-25 17:08:06,246 INFO  L226             Difference]: Without dead ends: 23621
[2022-11-25 17:08:06,259 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-25 17:08:06,261 INFO  L413           NwaCegarLoop]: 40 mSDtfsCounter, 196 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time
[2022-11-25 17:08:06,264 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 71 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time]
[2022-11-25 17:08:06,287 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23621 states.
[2022-11-25 17:08:06,611 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23621 to 19569.
[2022-11-25 17:08:06,622 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 19569 states, 19568 states have (on average 1.0917313982011447) internal successors, (21363), 19568 states have internal predecessors, (21363), 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)
[2022-11-25 17:08:06,643 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19569 states to 19569 states and 21363 transitions.
[2022-11-25 17:08:06,643 INFO  L78                 Accepts]: Start accepts. Automaton has 19569 states and 21363 transitions. Word has length 896
[2022-11-25 17:08:06,643 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-25 17:08:06,644 INFO  L495      AbstractCegarLoop]: Abstraction has 19569 states and 21363 transitions.
[2022-11-25 17:08:06,644 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 124.25) internal successors, (497), 4 states have internal predecessors, (497), 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)
[2022-11-25 17:08:06,644 INFO  L276                IsEmpty]: Start isEmpty. Operand 19569 states and 21363 transitions.
[2022-11-25 17:08:06,670 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 908
[2022-11-25 17:08:06,671 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-25 17:08:06,671 INFO  L195           NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-25 17:08:06,672 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22
[2022-11-25 17:08:06,672 INFO  L420      AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-25 17:08:06,672 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-25 17:08:06,673 INFO  L85        PathProgramCache]: Analyzing trace with hash 1401252317, now seen corresponding path program 1 times
[2022-11-25 17:08:06,673 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-25 17:08:06,673 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290767752]
[2022-11-25 17:08:06,673 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:08:06,674 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-25 17:08:06,883 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:08:07,908 INFO  L134       CoverageAnalysis]: Checked inductivity of 3075 backedges. 2450 proven. 0 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked.
[2022-11-25 17:08:07,909 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-25 17:08:07,909 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290767752]
[2022-11-25 17:08:07,909 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290767752] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-25 17:08:07,909 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-25 17:08:07,909 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-11-25 17:08:07,910 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729756913]
[2022-11-25 17:08:07,910 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-25 17:08:07,911 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-11-25 17:08:07,911 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-25 17:08:07,912 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-11-25 17:08:07,912 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-25 17:08:07,913 INFO  L87              Difference]: Start difference. First operand 19569 states and 21363 transitions. Second operand  has 4 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 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)
[2022-11-25 17:08:09,800 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-25 17:08:09,800 INFO  L93              Difference]: Finished difference Result 44118 states and 48129 transitions.
[2022-11-25 17:08:09,803 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-11-25 17:08:09,809 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 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 907
[2022-11-25 17:08:09,810 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-25 17:08:09,837 INFO  L225             Difference]: With dead ends: 44118
[2022-11-25 17:08:09,837 INFO  L226             Difference]: Without dead ends: 24919
[2022-11-25 17:08:09,849 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-25 17:08:09,850 INFO  L413           NwaCegarLoop]: 40 mSDtfsCounter, 180 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time
[2022-11-25 17:08:09,850 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 73 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time]
[2022-11-25 17:08:09,874 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24919 states.
[2022-11-25 17:08:10,215 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24919 to 19753.
[2022-11-25 17:08:10,225 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 19753 states, 19752 states have (on average 1.0881429728635075) internal successors, (21493), 19752 states have internal predecessors, (21493), 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)
[2022-11-25 17:08:10,246 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19753 states to 19753 states and 21493 transitions.
[2022-11-25 17:08:10,246 INFO  L78                 Accepts]: Start accepts. Automaton has 19753 states and 21493 transitions. Word has length 907
[2022-11-25 17:08:10,246 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-25 17:08:10,246 INFO  L495      AbstractCegarLoop]: Abstraction has 19753 states and 21493 transitions.
[2022-11-25 17:08:10,247 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 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)
[2022-11-25 17:08:10,247 INFO  L276                IsEmpty]: Start isEmpty. Operand 19753 states and 21493 transitions.
[2022-11-25 17:08:10,267 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1051
[2022-11-25 17:08:10,267 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-25 17:08:10,267 INFO  L195           NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-25 17:08:10,268 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23
[2022-11-25 17:08:10,268 INFO  L420      AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-25 17:08:10,268 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-25 17:08:10,269 INFO  L85        PathProgramCache]: Analyzing trace with hash 198152612, now seen corresponding path program 1 times
[2022-11-25 17:08:10,269 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-25 17:08:10,269 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332749045]
[2022-11-25 17:08:10,269 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:08:10,269 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-25 17:08:10,451 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:08:13,815 INFO  L134       CoverageAnalysis]: Checked inductivity of 3765 backedges. 2224 proven. 830 refuted. 0 times theorem prover too weak. 711 trivial. 0 not checked.
[2022-11-25 17:08:13,815 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-25 17:08:13,816 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332749045]
[2022-11-25 17:08:13,816 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332749045] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-25 17:08:13,816 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398557146]
[2022-11-25 17:08:13,816 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:08:13,817 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-25 17:08:13,817 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3
[2022-11-25 17:08:13,818 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-25 17:08:13,852 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2022-11-25 17:08:14,326 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:08:14,333 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1362 conjuncts, 3 conjunts are in the unsatisfiable core
[2022-11-25 17:08:14,350 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-25 17:08:14,815 INFO  L134       CoverageAnalysis]: Checked inductivity of 3765 backedges. 2291 proven. 0 refuted. 0 times theorem prover too weak. 1474 trivial. 0 not checked.
[2022-11-25 17:08:14,816 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-11-25 17:08:14,816 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398557146] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-25 17:08:14,817 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2022-11-25 17:08:14,817 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8
[2022-11-25 17:08:14,817 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514237059]
[2022-11-25 17:08:14,817 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-25 17:08:14,819 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-25 17:08:14,819 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-25 17:08:14,820 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-25 17:08:14,820 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2022-11-25 17:08:14,820 INFO  L87              Difference]: Start difference. First operand 19753 states and 21493 transitions. Second operand  has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 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)
[2022-11-25 17:08:15,940 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-25 17:08:15,940 INFO  L93              Difference]: Finished difference Result 39890 states and 43462 transitions.
[2022-11-25 17:08:15,941 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-25 17:08:15,941 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 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 1050
[2022-11-25 17:08:15,942 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-25 17:08:15,963 INFO  L225             Difference]: With dead ends: 39890
[2022-11-25 17:08:15,963 INFO  L226             Difference]: Without dead ends: 20507
[2022-11-25 17:08:15,973 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 1057 GetRequests, 1051 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2022-11-25 17:08:15,973 INFO  L413           NwaCegarLoop]: 310 mSDtfsCounter, 106 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time
[2022-11-25 17:08:15,974 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 328 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time]
[2022-11-25 17:08:15,989 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20507 states.
[2022-11-25 17:08:16,260 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20507 to 19763.
[2022-11-25 17:08:16,273 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 19763 states, 19762 states have (on average 1.0865803056370813) internal successors, (21473), 19762 states have internal predecessors, (21473), 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)
[2022-11-25 17:08:16,294 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19763 states to 19763 states and 21473 transitions.
[2022-11-25 17:08:16,294 INFO  L78                 Accepts]: Start accepts. Automaton has 19763 states and 21473 transitions. Word has length 1050
[2022-11-25 17:08:16,294 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-25 17:08:16,295 INFO  L495      AbstractCegarLoop]: Abstraction has 19763 states and 21473 transitions.
[2022-11-25 17:08:16,295 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 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)
[2022-11-25 17:08:16,295 INFO  L276                IsEmpty]: Start isEmpty. Operand 19763 states and 21473 transitions.
[2022-11-25 17:08:16,312 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1055
[2022-11-25 17:08:16,312 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-25 17:08:16,313 INFO  L195           NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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]
[2022-11-25 17:08:16,319 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2022-11-25 17:08:16,518 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24
[2022-11-25 17:08:16,519 INFO  L420      AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-25 17:08:16,519 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-25 17:08:16,519 INFO  L85        PathProgramCache]: Analyzing trace with hash 256274069, now seen corresponding path program 1 times
[2022-11-25 17:08:16,519 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-25 17:08:16,520 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591974046]
[2022-11-25 17:08:16,520 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:08:16,520 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-25 17:08:16,706 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:08:18,132 INFO  L134       CoverageAnalysis]: Checked inductivity of 3893 backedges. 3097 proven. 0 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked.
[2022-11-25 17:08:18,133 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-25 17:08:18,133 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591974046]
[2022-11-25 17:08:18,133 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591974046] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-25 17:08:18,133 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-25 17:08:18,134 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-11-25 17:08:18,134 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191871308]
[2022-11-25 17:08:18,134 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-25 17:08:18,135 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-11-25 17:08:18,135 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-25 17:08:18,137 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-11-25 17:08:18,137 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-25 17:08:18,137 INFO  L87              Difference]: Start difference. First operand 19763 states and 21473 transitions. Second operand  has 4 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 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)
[2022-11-25 17:08:20,180 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-25 17:08:20,181 INFO  L93              Difference]: Finished difference Result 44880 states and 48738 transitions.
[2022-11-25 17:08:20,181 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-11-25 17:08:20,181 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 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 1054
[2022-11-25 17:08:20,182 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-25 17:08:20,207 INFO  L225             Difference]: With dead ends: 44880
[2022-11-25 17:08:20,207 INFO  L226             Difference]: Without dead ends: 25487
[2022-11-25 17:08:20,217 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-25 17:08:20,218 INFO  L413           NwaCegarLoop]: 40 mSDtfsCounter, 182 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time
[2022-11-25 17:08:20,218 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 73 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1058 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time]
[2022-11-25 17:08:20,241 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25487 states.
[2022-11-25 17:08:20,507 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25487 to 19395.
[2022-11-25 17:08:20,519 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 19395 states, 19394 states have (on average 1.087604413736207) internal successors, (21093), 19394 states have internal predecessors, (21093), 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)
[2022-11-25 17:08:20,540 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19395 states to 19395 states and 21093 transitions.
[2022-11-25 17:08:20,540 INFO  L78                 Accepts]: Start accepts. Automaton has 19395 states and 21093 transitions. Word has length 1054
[2022-11-25 17:08:20,541 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-25 17:08:20,541 INFO  L495      AbstractCegarLoop]: Abstraction has 19395 states and 21093 transitions.
[2022-11-25 17:08:20,541 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 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)
[2022-11-25 17:08:20,541 INFO  L276                IsEmpty]: Start isEmpty. Operand 19395 states and 21093 transitions.
[2022-11-25 17:08:20,559 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1161
[2022-11-25 17:08:20,560 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-25 17:08:20,560 INFO  L195           NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 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, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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]
[2022-11-25 17:08:20,560 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25
[2022-11-25 17:08:20,560 INFO  L420      AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-25 17:08:20,561 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-25 17:08:20,561 INFO  L85        PathProgramCache]: Analyzing trace with hash -1982006465, now seen corresponding path program 1 times
[2022-11-25 17:08:20,561 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-25 17:08:20,561 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947160359]
[2022-11-25 17:08:20,561 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:08:20,561 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-25 17:08:20,734 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:08:21,327 INFO  L134       CoverageAnalysis]: Checked inductivity of 4178 backedges. 2244 proven. 0 refuted. 0 times theorem prover too weak. 1934 trivial. 0 not checked.
[2022-11-25 17:08:21,327 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-25 17:08:21,328 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947160359]
[2022-11-25 17:08:21,328 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947160359] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-25 17:08:21,328 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-25 17:08:21,328 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-11-25 17:08:21,328 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345001252]
[2022-11-25 17:08:21,329 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-25 17:08:21,330 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-25 17:08:21,330 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-25 17:08:21,331 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-25 17:08:21,331 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-25 17:08:21,331 INFO  L87              Difference]: Start difference. First operand 19395 states and 21093 transitions. Second operand  has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 states have internal predecessors, (320), 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)
[2022-11-25 17:08:22,094 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-25 17:08:22,094 INFO  L93              Difference]: Finished difference Result 37672 states and 40972 transitions.
[2022-11-25 17:08:22,095 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-25 17:08:22,095 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 states have internal predecessors, (320), 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 1160
[2022-11-25 17:08:22,098 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-25 17:08:22,120 INFO  L225             Difference]: With dead ends: 37672
[2022-11-25 17:08:22,120 INFO  L226             Difference]: Without dead ends: 18646
[2022-11-25 17:08:22,131 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
[2022-11-25 17:08:22,133 INFO  L413           NwaCegarLoop]: 31 mSDtfsCounter, 151 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-11-25 17:08:22,133 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 31 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-11-25 17:08:22,152 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 18646 states.
[2022-11-25 17:08:22,447 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 18646 to 18640.
[2022-11-25 17:08:22,458 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 18640 states, 18639 states have (on average 1.0858951660496807) internal successors, (20240), 18639 states have internal predecessors, (20240), 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)
[2022-11-25 17:08:22,478 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18640 states to 18640 states and 20240 transitions.
[2022-11-25 17:08:22,479 INFO  L78                 Accepts]: Start accepts. Automaton has 18640 states and 20240 transitions. Word has length 1160
[2022-11-25 17:08:22,479 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-25 17:08:22,479 INFO  L495      AbstractCegarLoop]: Abstraction has 18640 states and 20240 transitions.
[2022-11-25 17:08:22,479 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 states have internal predecessors, (320), 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)
[2022-11-25 17:08:22,479 INFO  L276                IsEmpty]: Start isEmpty. Operand 18640 states and 20240 transitions.
[2022-11-25 17:08:22,498 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1185
[2022-11-25 17:08:22,498 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-25 17:08:22,498 INFO  L195           NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 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, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-25 17:08:22,498 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26
[2022-11-25 17:08:22,499 INFO  L420      AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-25 17:08:22,499 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-25 17:08:22,499 INFO  L85        PathProgramCache]: Analyzing trace with hash -1536632297, now seen corresponding path program 1 times
[2022-11-25 17:08:22,499 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-25 17:08:22,499 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264970454]
[2022-11-25 17:08:22,500 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:08:22,500 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-25 17:08:22,722 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:08:25,355 INFO  L134       CoverageAnalysis]: Checked inductivity of 4195 backedges. 1524 proven. 0 refuted. 0 times theorem prover too weak. 2671 trivial. 0 not checked.
[2022-11-25 17:08:25,356 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-25 17:08:25,356 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264970454]
[2022-11-25 17:08:25,356 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264970454] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-25 17:08:25,356 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-25 17:08:25,357 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-11-25 17:08:25,357 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601209689]
[2022-11-25 17:08:25,357 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-25 17:08:25,358 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-11-25 17:08:25,358 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-25 17:08:25,359 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-11-25 17:08:25,359 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-25 17:08:25,359 INFO  L87              Difference]: Start difference. First operand 18640 states and 20240 transitions. Second operand  has 4 states, 4 states have (on average 102.5) internal successors, (410), 3 states have internal predecessors, (410), 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)
[2022-11-25 17:08:27,123 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-25 17:08:27,124 INFO  L93              Difference]: Finished difference Result 37831 states and 41085 transitions.
[2022-11-25 17:08:27,124 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-11-25 17:08:27,124 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 102.5) internal successors, (410), 3 states have internal predecessors, (410), 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 1184
[2022-11-25 17:08:27,125 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-25 17:08:27,142 INFO  L225             Difference]: With dead ends: 37831
[2022-11-25 17:08:27,142 INFO  L226             Difference]: Without dead ends: 19193
[2022-11-25 17:08:27,151 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
[2022-11-25 17:08:27,152 INFO  L413           NwaCegarLoop]: 46 mSDtfsCounter, 203 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time
[2022-11-25 17:08:27,153 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 75 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time]
[2022-11-25 17:08:27,172 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19193 states.
[2022-11-25 17:08:27,402 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19193 to 19192.
[2022-11-25 17:08:27,414 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 19192 states, 19191 states have (on average 1.0842582460528372) internal successors, (20808), 19191 states have internal predecessors, (20808), 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)
[2022-11-25 17:08:27,434 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19192 states to 19192 states and 20808 transitions.
[2022-11-25 17:08:27,435 INFO  L78                 Accepts]: Start accepts. Automaton has 19192 states and 20808 transitions. Word has length 1184
[2022-11-25 17:08:27,435 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-25 17:08:27,435 INFO  L495      AbstractCegarLoop]: Abstraction has 19192 states and 20808 transitions.
[2022-11-25 17:08:27,436 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 102.5) internal successors, (410), 3 states have internal predecessors, (410), 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)
[2022-11-25 17:08:27,436 INFO  L276                IsEmpty]: Start isEmpty. Operand 19192 states and 20808 transitions.
[2022-11-25 17:08:27,455 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1223
[2022-11-25 17:08:27,455 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-25 17:08:27,455 INFO  L195           NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-25 17:08:27,456 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27
[2022-11-25 17:08:27,456 INFO  L420      AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-25 17:08:27,456 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-25 17:08:27,456 INFO  L85        PathProgramCache]: Analyzing trace with hash 1855217040, now seen corresponding path program 1 times
[2022-11-25 17:08:27,456 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-25 17:08:27,456 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386196439]
[2022-11-25 17:08:27,457 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:08:27,457 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-25 17:08:27,634 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:08:29,032 INFO  L134       CoverageAnalysis]: Checked inductivity of 4769 backedges. 2030 proven. 0 refuted. 0 times theorem prover too weak. 2739 trivial. 0 not checked.
[2022-11-25 17:08:29,032 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-25 17:08:29,033 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386196439]
[2022-11-25 17:08:29,033 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386196439] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-25 17:08:29,033 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-25 17:08:29,033 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-11-25 17:08:29,034 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887295136]
[2022-11-25 17:08:29,034 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-25 17:08:29,035 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-25 17:08:29,035 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-25 17:08:29,036 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-25 17:08:29,036 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-25 17:08:29,037 INFO  L87              Difference]: Start difference. First operand 19192 states and 20808 transitions. Second operand  has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 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)
[2022-11-25 17:08:30,360 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-25 17:08:30,360 INFO  L93              Difference]: Finished difference Result 41337 states and 44764 transitions.
[2022-11-25 17:08:30,361 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-25 17:08:30,361 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 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 1222
[2022-11-25 17:08:30,361 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-25 17:08:30,380 INFO  L225             Difference]: With dead ends: 41337
[2022-11-25 17:08:30,380 INFO  L226             Difference]: Without dead ends: 21411
[2022-11-25 17:08:30,390 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
[2022-11-25 17:08:30,391 INFO  L413           NwaCegarLoop]: 310 mSDtfsCounter, 135 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time
[2022-11-25 17:08:30,391 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 324 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time]
[2022-11-25 17:08:30,409 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21411 states.
[2022-11-25 17:08:30,659 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21411 to 19749.
[2022-11-25 17:08:30,671 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 19749 states, 19748 states have (on average 1.08122341502937) internal successors, (21352), 19748 states have internal predecessors, (21352), 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)
[2022-11-25 17:08:30,692 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19749 states to 19749 states and 21352 transitions.
[2022-11-25 17:08:30,692 INFO  L78                 Accepts]: Start accepts. Automaton has 19749 states and 21352 transitions. Word has length 1222
[2022-11-25 17:08:30,693 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-25 17:08:30,693 INFO  L495      AbstractCegarLoop]: Abstraction has 19749 states and 21352 transitions.
[2022-11-25 17:08:30,693 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 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)
[2022-11-25 17:08:30,693 INFO  L276                IsEmpty]: Start isEmpty. Operand 19749 states and 21352 transitions.
[2022-11-25 17:08:30,712 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1223
[2022-11-25 17:08:30,712 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-25 17:08:30,713 INFO  L195           NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 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, 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, 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]
[2022-11-25 17:08:30,713 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28
[2022-11-25 17:08:30,713 INFO  L420      AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-25 17:08:30,714 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-25 17:08:30,714 INFO  L85        PathProgramCache]: Analyzing trace with hash 1480409017, now seen corresponding path program 1 times
[2022-11-25 17:08:30,714 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-25 17:08:30,715 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53386374]
[2022-11-25 17:08:30,715 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:08:30,715 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-25 17:08:30,914 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:08:33,379 INFO  L134       CoverageAnalysis]: Checked inductivity of 4256 backedges. 2293 proven. 73 refuted. 0 times theorem prover too weak. 1890 trivial. 0 not checked.
[2022-11-25 17:08:33,379 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-25 17:08:33,379 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53386374]
[2022-11-25 17:08:33,379 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53386374] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-25 17:08:33,380 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982668228]
[2022-11-25 17:08:33,380 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-25 17:08:33,381 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-25 17:08:33,381 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3
[2022-11-25 17:08:33,382 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-25 17:08:33,402 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2022-11-25 17:08:33,955 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-25 17:08:33,963 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1535 conjuncts, 3 conjunts are in the unsatisfiable core
[2022-11-25 17:08:33,982 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-25 17:08:34,268 INFO  L134       CoverageAnalysis]: Checked inductivity of 4256 backedges. 2616 proven. 0 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked.
[2022-11-25 17:08:34,268 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-11-25 17:08:34,268 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982668228] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-25 17:08:34,269 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2022-11-25 17:08:34,269 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4
[2022-11-25 17:08:34,270 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730422440]
[2022-11-25 17:08:34,270 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-25 17:08:34,271 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-25 17:08:34,271 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-25 17:08:34,272 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-25 17:08:34,272 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-11-25 17:08:34,272 INFO  L87              Difference]: Start difference. First operand 19749 states and 21352 transitions. Second operand  has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 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)
[2022-11-25 17:08:35,415 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-25 17:08:35,415 INFO  L93              Difference]: Finished difference Result 33400 states and 36118 transitions.
[2022-11-25 17:08:35,416 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-25 17:08:35,416 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 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 1222
[2022-11-25 17:08:35,416 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-25 17:08:35,417 INFO  L225             Difference]: With dead ends: 33400
[2022-11-25 17:08:35,417 INFO  L226             Difference]: Without dead ends: 0
[2022-11-25 17:08:35,426 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 1225 GetRequests, 1223 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-11-25 17:08:35,426 INFO  L413           NwaCegarLoop]: 267 mSDtfsCounter, 64 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time
[2022-11-25 17:08:35,426 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 279 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time]
[2022-11-25 17:08:35,427 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2022-11-25 17:08:35,427 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2022-11-25 17:08:35,427 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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)
[2022-11-25 17:08:35,427 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2022-11-25 17:08:35,428 INFO  L78                 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1222
[2022-11-25 17:08:35,428 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-25 17:08:35,428 INFO  L495      AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2022-11-25 17:08:35,428 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 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)
[2022-11-25 17:08:35,428 INFO  L276                IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2022-11-25 17:08:35,428 INFO  L282                IsEmpty]: Finished isEmpty. No accepting run.
[2022-11-25 17:08:35,431 INFO  L805   garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining)
[2022-11-25 17:08:35,447 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2022-11-25 17:08:35,638 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2901b235-e8a4-4305-8615-e8a8380102fe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-25 17:08:35,640 INFO  L343    DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.