./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rether.7.prop1-func-interl.c --full-output --architecture 64bit


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


Checking for ERROR reachability
Using default analysis
Version 8393723b
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_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rether.7.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro --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 64bit --witnessprinter.graph.data.programhash 31793d9db33fd67787666e2c5067c043f20215b55c69f8b3e1528500898f204e
--- 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-8393723
[2022-11-18 20:26:25,705 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-11-18 20:26:25,707 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-11-18 20:26:25,725 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-11-18 20:26:25,728 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-11-18 20:26:25,731 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-11-18 20:26:25,734 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-11-18 20:26:25,737 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-11-18 20:26:25,741 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-11-18 20:26:25,746 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-11-18 20:26:25,748 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-11-18 20:26:25,750 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-11-18 20:26:25,750 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-11-18 20:26:25,753 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-11-18 20:26:25,756 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-11-18 20:26:25,759 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-11-18 20:26:25,760 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-11-18 20:26:25,761 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-11-18 20:26:25,763 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-11-18 20:26:25,770 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-11-18 20:26:25,772 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-11-18 20:26:25,773 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-11-18 20:26:25,777 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-11-18 20:26:25,778 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-11-18 20:26:25,786 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-11-18 20:26:25,787 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-11-18 20:26:25,787 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-11-18 20:26:25,790 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-11-18 20:26:25,791 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-11-18 20:26:25,792 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-11-18 20:26:25,792 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-11-18 20:26:25,794 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-11-18 20:26:25,796 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-11-18 20:26:25,797 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-11-18 20:26:25,799 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-11-18 20:26:25,800 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-11-18 20:26:25,801 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-11-18 20:26:25,801 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-11-18 20:26:25,801 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-11-18 20:26:25,802 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-11-18 20:26:25,803 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-11-18 20:26:25,804 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf
[2022-11-18 20:26:25,843 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-11-18 20:26:25,847 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-11-18 20:26:25,848 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-11-18 20:26:25,848 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-11-18 20:26:25,849 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-11-18 20:26:25,850 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-11-18 20:26:25,850 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-11-18 20:26:25,851 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-11-18 20:26:25,851 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-11-18 20:26:25,851 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-11-18 20:26:25,853 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-11-18 20:26:25,853 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-11-18 20:26:25,853 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-11-18 20:26:25,854 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-11-18 20:26:25,854 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-11-18 20:26:25,854 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-11-18 20:26:25,855 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-11-18 20:26:25,855 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-11-18 20:26:25,855 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-11-18 20:26:25,855 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-11-18 20:26:25,856 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-11-18 20:26:25,856 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-11-18 20:26:25,856 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-11-18 20:26:25,857 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-11-18 20:26:25,857 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-11-18 20:26:25,857 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-11-18 20:26:25,859 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-11-18 20:26:25,860 INFO  L138        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2022-11-18 20:26:25,860 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-11-18 20:26:25,860 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-11-18 20:26:25,860 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/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_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro
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 -> 64bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31793d9db33fd67787666e2c5067c043f20215b55c69f8b3e1528500898f204e
[2022-11-18 20:26:26,156 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-11-18 20:26:26,178 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-11-18 20:26:26,181 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-11-18 20:26:26,182 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-11-18 20:26:26,183 INFO  L275        PluginConnector]: CDTParser initialized
[2022-11-18 20:26:26,185 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rether.7.prop1-func-interl.c
[2022-11-18 20:26:26,256 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/data/7d8f90c7f/74829df5e7164804930e8045e606e1a3/FLAGba285e6a1
[2022-11-18 20:26:27,163 INFO  L306              CDTParser]: Found 1 translation units.
[2022-11-18 20:26:27,164 INFO  L160              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rether.7.prop1-func-interl.c
[2022-11-18 20:26:27,205 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/data/7d8f90c7f/74829df5e7164804930e8045e606e1a3/FLAGba285e6a1
[2022-11-18 20:26:27,626 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/data/7d8f90c7f/74829df5e7164804930e8045e606e1a3
[2022-11-18 20:26:27,629 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-11-18 20:26:27,631 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-11-18 20:26:27,638 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-11-18 20:26:27,638 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-11-18 20:26:27,642 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-11-18 20:26:27,643 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:26:27" (1/1) ...
[2022-11-18 20:26:27,644 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@445e39dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:27, skipping insertion in model container
[2022-11-18 20:26:27,644 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:26:27" (1/1) ...
[2022-11-18 20:26:27,652 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-11-18 20:26:27,880 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-11-18 20:26:28,261 WARN  L234   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_2ed77574-1a53-41e1-b12f-4f04b643eda7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rether.7.prop1-func-interl.c[1014,1027]
[2022-11-18 20:26:29,447 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-11-18 20:26:29,452 INFO  L203         MainTranslator]: Completed pre-run
[2022-11-18 20:26:29,464 WARN  L234   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_2ed77574-1a53-41e1-b12f-4f04b643eda7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rether.7.prop1-func-interl.c[1014,1027]
[2022-11-18 20:26:30,276 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-11-18 20:26:30,288 INFO  L208         MainTranslator]: Completed translation
[2022-11-18 20:26:30,289 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:30 WrapperNode
[2022-11-18 20:26:30,290 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-11-18 20:26:30,292 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-11-18 20:26:30,293 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-11-18 20:26:30,293 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-11-18 20:26:30,301 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:30" (1/1) ...
[2022-11-18 20:26:30,449 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:30" (1/1) ...
[2022-11-18 20:26:31,427 INFO  L138                Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 20338
[2022-11-18 20:26:31,427 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-11-18 20:26:31,428 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-11-18 20:26:31,429 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-11-18 20:26:31,429 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-11-18 20:26:31,440 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:30" (1/1) ...
[2022-11-18 20:26:31,448 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:30" (1/1) ...
[2022-11-18 20:26:31,746 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:30" (1/1) ...
[2022-11-18 20:26:31,746 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:30" (1/1) ...
[2022-11-18 20:26:32,259 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:30" (1/1) ...
[2022-11-18 20:26:32,440 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:30" (1/1) ...
[2022-11-18 20:26:32,529 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:30" (1/1) ...
[2022-11-18 20:26:32,570 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:30" (1/1) ...
[2022-11-18 20:26:32,809 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-11-18 20:26:32,810 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-11-18 20:26:32,810 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-11-18 20:26:32,811 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-11-18 20:26:32,812 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:30" (1/1) ...
[2022-11-18 20:26:32,820 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-11-18 20:26:32,831 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/z3
[2022-11-18 20:26:32,846 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-11-18 20:26:32,879 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-11-18 20:26:32,911 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-11-18 20:26:32,911 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-11-18 20:26:34,612 INFO  L235             CfgBuilder]: Building ICFG
[2022-11-18 20:26:34,614 INFO  L261             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-11-18 20:31:03,055 INFO  L276             CfgBuilder]: Performing block encoding
[2022-11-18 20:31:03,079 INFO  L295             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-11-18 20:31:03,080 INFO  L300             CfgBuilder]: Removed 1 assume(true) statements.
[2022-11-18 20:31:03,086 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:31:03 BoogieIcfgContainer
[2022-11-18 20:31:03,086 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-11-18 20:31:03,089 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-11-18 20:31:03,089 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-11-18 20:31:03,093 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-11-18 20:31:03,093 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:26:27" (1/3) ...
[2022-11-18 20:31:03,094 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26546c66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:31:03, skipping insertion in model container
[2022-11-18 20:31:03,094 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:30" (2/3) ...
[2022-11-18 20:31:03,094 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26546c66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:31:03, skipping insertion in model container
[2022-11-18 20:31:03,094 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:31:03" (3/3) ...
[2022-11-18 20:31:03,096 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.rether.7.prop1-func-interl.c
[2022-11-18 20:31:03,118 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-11-18 20:31:03,118 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-11-18 20:31:03,246 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-11-18 20:31:03,256 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;@10caafd4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2022-11-18 20:31:03,257 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-11-18 20:31:03,275 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 3236 states, 3234 states have (on average 1.6660482374768089) internal successors, (5388), 3235 states have internal predecessors, (5388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-18 20:31:03,292 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 232
[2022-11-18 20:31:03,292 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-18 20:31:03,293 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-18 20:31:03,294 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-18 20:31:03,301 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-18 20:31:03,301 INFO  L85        PathProgramCache]: Analyzing trace with hash -225198174, now seen corresponding path program 1 times
[2022-11-18 20:31:03,310 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-18 20:31:03,311 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398788050]
[2022-11-18 20:31:03,311 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-18 20:31:03,312 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-18 20:31:03,719 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-18 20:31:04,614 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-18 20:31:04,614 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-18 20:31:04,615 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398788050]
[2022-11-18 20:31:04,615 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398788050] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-18 20:31:04,616 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-18 20:31:04,616 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-11-18 20:31:04,618 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895496171]
[2022-11-18 20:31:04,619 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-18 20:31:04,625 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-11-18 20:31:04,625 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-18 20:31:04,662 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-11-18 20:31:04,664 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-11-18 20:31:04,673 INFO  L87              Difference]: Start difference. First operand  has 3236 states, 3234 states have (on average 1.6660482374768089) internal successors, (5388), 3235 states have internal predecessors, (5388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-18 20:31:05,104 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-18 20:31:05,104 INFO  L93              Difference]: Finished difference Result 10033 states and 16717 transitions.
[2022-11-18 20:31:05,106 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-11-18 20:31:05,107 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 0 states have call successors, (0), 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 231
[2022-11-18 20:31:05,109 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-18 20:31:05,151 INFO  L225             Difference]: With dead ends: 10033
[2022-11-18 20:31:05,152 INFO  L226             Difference]: Without dead ends: 6799
[2022-11-18 20:31:05,164 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2022-11-18 20:31:05,168 INFO  L413           NwaCegarLoop]: 5945 mSDtfsCounter, 16122 mSDsluCounter, 6503 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16122 SdHoareTripleChecker+Valid, 12448 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-11-18 20:31:05,170 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [16122 Valid, 12448 Invalid, 18 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-11-18 20:31:05,200 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6799 states.
[2022-11-18 20:31:05,327 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6799 to 3234.
[2022-11-18 20:31:05,337 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3234 states, 3233 states have (on average 1.6653263223012682) internal successors, (5384), 3233 states have internal predecessors, (5384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-18 20:31:05,346 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3234 states to 3234 states and 5384 transitions.
[2022-11-18 20:31:05,348 INFO  L78                 Accepts]: Start accepts. Automaton has 3234 states and 5384 transitions. Word has length 231
[2022-11-18 20:31:05,353 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-18 20:31:05,353 INFO  L495      AbstractCegarLoop]: Abstraction has 3234 states and 5384 transitions.
[2022-11-18 20:31:05,354 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-18 20:31:05,354 INFO  L276                IsEmpty]: Start isEmpty. Operand 3234 states and 5384 transitions.
[2022-11-18 20:31:05,364 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 233
[2022-11-18 20:31:05,364 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-18 20:31:05,364 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-18 20:31:05,365 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-11-18 20:31:05,365 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-18 20:31:05,365 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-18 20:31:05,366 INFO  L85        PathProgramCache]: Analyzing trace with hash 1610517502, now seen corresponding path program 1 times
[2022-11-18 20:31:05,366 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-18 20:31:05,366 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729768494]
[2022-11-18 20:31:05,366 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-18 20:31:05,367 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-18 20:31:05,524 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-18 20:31:06,158 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-18 20:31:06,160 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-18 20:31:06,161 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729768494]
[2022-11-18 20:31:06,161 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729768494] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-18 20:31:06,161 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-18 20:31:06,161 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-11-18 20:31:06,162 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373138869]
[2022-11-18 20:31:06,162 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-18 20:31:06,165 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-11-18 20:31:06,165 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-18 20:31:06,166 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-11-18 20:31:06,166 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-11-18 20:31:06,167 INFO  L87              Difference]: Start difference. First operand 3234 states and 5384 transitions. Second operand  has 5 states, 5 states have (on average 46.4) internal successors, (232), 5 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-18 20:31:06,958 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-18 20:31:06,958 INFO  L93              Difference]: Finished difference Result 13251 states and 22070 transitions.
[2022-11-18 20:31:06,960 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2022-11-18 20:31:06,960 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 46.4) internal successors, (232), 5 states have internal predecessors, (232), 0 states have call successors, (0), 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 232
[2022-11-18 20:31:06,963 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-18 20:31:06,992 INFO  L225             Difference]: With dead ends: 13251
[2022-11-18 20:31:06,992 INFO  L226             Difference]: Without dead ends: 10019
[2022-11-18 20:31:07,005 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2022-11-18 20:31:07,006 INFO  L413           NwaCegarLoop]: 5937 mSDtfsCounter, 21267 mSDsluCounter, 16683 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21267 SdHoareTripleChecker+Valid, 22620 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-11-18 20:31:07,007 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21267 Valid, 22620 Invalid, 24 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-11-18 20:31:07,021 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10019 states.
[2022-11-18 20:31:07,122 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10019 to 3572.
[2022-11-18 20:31:07,130 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3572 states, 3571 states have (on average 1.6650798095771493) internal successors, (5946), 3571 states have internal predecessors, (5946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-18 20:31:07,140 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3572 states to 3572 states and 5946 transitions.
[2022-11-18 20:31:07,141 INFO  L78                 Accepts]: Start accepts. Automaton has 3572 states and 5946 transitions. Word has length 232
[2022-11-18 20:31:07,142 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-18 20:31:07,143 INFO  L495      AbstractCegarLoop]: Abstraction has 3572 states and 5946 transitions.
[2022-11-18 20:31:07,144 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 46.4) internal successors, (232), 5 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-18 20:31:07,144 INFO  L276                IsEmpty]: Start isEmpty. Operand 3572 states and 5946 transitions.
[2022-11-18 20:31:07,318 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2386
[2022-11-18 20:31:07,319 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-18 20:31:07,324 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-18 20:31:07,324 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-11-18 20:31:07,324 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-18 20:31:07,334 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-18 20:31:07,335 INFO  L85        PathProgramCache]: Analyzing trace with hash 136482959, now seen corresponding path program 1 times
[2022-11-18 20:31:07,336 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-18 20:31:07,336 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261421601]
[2022-11-18 20:31:07,336 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-18 20:31:07,337 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-18 20:31:08,636 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-18 20:31:08,636 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995581078]
[2022-11-18 20:31:08,638 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-18 20:31:08,639 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-18 20:31:08,639 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/z3
[2022-11-18 20:31:08,643 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-18 20:31:08,676 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-11-18 20:31:18,124 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-18 20:31:18,321 INFO  L263         TraceCheckSpWp]: Trace formula consists of 24741 conjuncts, 23 conjunts are in the unsatisfiable core
[2022-11-18 20:31:18,438 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-18 20:31:36,031 INFO  L134       CoverageAnalysis]: Checked inductivity of 228 backedges. 2 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-18 20:31:36,031 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-11-18 20:31:36,323 INFO  L134       CoverageAnalysis]: Checked inductivity of 228 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked.
[2022-11-18 20:31:36,324 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-18 20:31:36,324 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261421601]
[2022-11-18 20:31:36,324 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-18 20:31:36,324 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995581078]
[2022-11-18 20:31:36,327 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [995581078] provided 1 perfect and 1 imperfect interpolant sequences
[2022-11-18 20:31:36,327 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2022-11-18 20:31:36,328 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11
[2022-11-18 20:31:36,331 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690262349]
[2022-11-18 20:31:36,331 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-18 20:31:36,334 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-11-18 20:31:36,335 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-18 20:31:36,336 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-11-18 20:31:36,336 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110
[2022-11-18 20:31:36,338 INFO  L87              Difference]: Start difference. First operand 3572 states and 5946 transitions. Second operand  has 5 states, 5 states have (on average 432.4) internal successors, (2162), 5 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-18 20:32:03,232 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-18 20:32:03,232 INFO  L93              Difference]: Finished difference Result 20844 states and 34023 transitions.
[2022-11-18 20:32:03,233 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2022-11-18 20:32:03,234 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 432.4) internal successors, (2162), 5 states have internal predecessors, (2162), 0 states have call successors, (0), 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 2385
[2022-11-18 20:32:03,239 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-18 20:32:03,292 INFO  L225             Difference]: With dead ends: 20844
[2022-11-18 20:32:03,293 INFO  L226             Difference]: Without dead ends: 17612
[2022-11-18 20:32:03,302 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4772 GetRequests, 4761 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156
[2022-11-18 20:32:03,303 INFO  L413           NwaCegarLoop]: 2987 mSDtfsCounter, 30140 mSDsluCounter, 5073 mSDsCounter, 0 mSdLazyCounter, 18595 mSolverCounterSat, 2081 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30140 SdHoareTripleChecker+Valid, 8060 SdHoareTripleChecker+Invalid, 20676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2081 IncrementalHoareTripleChecker+Valid, 18595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.9s IncrementalHoareTripleChecker+Time
[2022-11-18 20:32:03,304 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [30140 Valid, 8060 Invalid, 20676 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2081 Valid, 18595 Invalid, 0 Unknown, 0 Unchecked, 25.9s Time]
[2022-11-18 20:32:03,323 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 17612 states.
[2022-11-18 20:32:03,458 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 17612 to 3575.
[2022-11-18 20:32:03,465 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3575 states, 3574 states have (on average 1.6648013430330162) internal successors, (5950), 3574 states have internal predecessors, (5950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-18 20:32:03,475 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3575 states to 3575 states and 5950 transitions.
[2022-11-18 20:32:03,475 INFO  L78                 Accepts]: Start accepts. Automaton has 3575 states and 5950 transitions. Word has length 2385
[2022-11-18 20:32:03,479 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-18 20:32:03,479 INFO  L495      AbstractCegarLoop]: Abstraction has 3575 states and 5950 transitions.
[2022-11-18 20:32:03,481 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 432.4) internal successors, (2162), 5 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-18 20:32:03,481 INFO  L276                IsEmpty]: Start isEmpty. Operand 3575 states and 5950 transitions.
[2022-11-18 20:32:03,826 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2386
[2022-11-18 20:32:03,826 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-18 20:32:03,829 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-18 20:32:03,921 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-11-18 20:32:04,044 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-18 20:32:04,045 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-18 20:32:04,049 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-18 20:32:04,050 INFO  L85        PathProgramCache]: Analyzing trace with hash 136542541, now seen corresponding path program 1 times
[2022-11-18 20:32:04,050 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-18 20:32:04,051 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850826179]
[2022-11-18 20:32:04,051 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-18 20:32:04,051 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-18 20:32:05,345 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-18 20:32:05,346 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1063223507]
[2022-11-18 20:32:05,346 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-18 20:32:05,347 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-18 20:32:05,347 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/z3
[2022-11-18 20:32:05,348 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-18 20:32:05,380 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-11-18 20:32:15,063 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-18 20:32:15,249 INFO  L263         TraceCheckSpWp]: Trace formula consists of 24741 conjuncts, 19 conjunts are in the unsatisfiable core
[2022-11-18 20:32:15,342 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-18 20:32:21,499 INFO  L134       CoverageAnalysis]: Checked inductivity of 228 backedges. 2 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-18 20:32:21,499 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-11-18 20:32:21,646 INFO  L134       CoverageAnalysis]: Checked inductivity of 228 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked.
[2022-11-18 20:32:21,646 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-18 20:32:21,646 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850826179]
[2022-11-18 20:32:21,647 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-18 20:32:21,647 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063223507]
[2022-11-18 20:32:21,649 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063223507] provided 1 perfect and 1 imperfect interpolant sequences
[2022-11-18 20:32:21,652 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2022-11-18 20:32:21,653 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 8
[2022-11-18 20:32:21,653 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110992065]
[2022-11-18 20:32:21,654 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-18 20:32:21,656 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-11-18 20:32:21,656 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-18 20:32:21,657 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-11-18 20:32:21,657 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56
[2022-11-18 20:32:21,658 INFO  L87              Difference]: Start difference. First operand 3575 states and 5950 transitions. Second operand  has 4 states, 4 states have (on average 540.5) internal successors, (2162), 4 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-18 20:32:21,956 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-18 20:32:21,956 INFO  L93              Difference]: Finished difference Result 13259 states and 22079 transitions.
[2022-11-18 20:32:21,957 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-11-18 20:32:21,958 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 540.5) internal successors, (2162), 4 states have internal predecessors, (2162), 0 states have call successors, (0), 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 2385
[2022-11-18 20:32:21,963 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-18 20:32:21,989 INFO  L225             Difference]: With dead ends: 13259
[2022-11-18 20:32:21,990 INFO  L226             Difference]: Without dead ends: 10024
[2022-11-18 20:32:21,995 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4770 GetRequests, 4763 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72
[2022-11-18 20:32:21,997 INFO  L413           NwaCegarLoop]: 5939 mSDtfsCounter, 16112 mSDsluCounter, 11304 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16112 SdHoareTripleChecker+Valid, 17243 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-11-18 20:32:21,998 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [16112 Valid, 17243 Invalid, 25 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-11-18 20:32:22,010 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10024 states.
[2022-11-18 20:32:22,092 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10024 to 3572.
[2022-11-18 20:32:22,113 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3572 states, 3571 states have (on average 1.6650798095771493) internal successors, (5946), 3571 states have internal predecessors, (5946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-18 20:32:22,120 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3572 states to 3572 states and 5946 transitions.
[2022-11-18 20:32:22,120 INFO  L78                 Accepts]: Start accepts. Automaton has 3572 states and 5946 transitions. Word has length 2385
[2022-11-18 20:32:22,124 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-18 20:32:22,124 INFO  L495      AbstractCegarLoop]: Abstraction has 3572 states and 5946 transitions.
[2022-11-18 20:32:22,126 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 540.5) internal successors, (2162), 4 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-18 20:32:22,126 INFO  L276                IsEmpty]: Start isEmpty. Operand 3572 states and 5946 transitions.
[2022-11-18 20:32:22,170 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2387
[2022-11-18 20:32:22,170 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-18 20:32:22,172 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-18 20:32:22,286 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-11-18 20:32:22,388 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-18 20:32:22,389 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-18 20:32:22,389 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-18 20:32:22,390 INFO  L85        PathProgramCache]: Analyzing trace with hash -274426677, now seen corresponding path program 1 times
[2022-11-18 20:32:22,390 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-18 20:32:22,391 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344241463]
[2022-11-18 20:32:22,391 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-18 20:32:22,391 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-18 20:32:23,465 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-18 20:32:23,465 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [300350925]
[2022-11-18 20:32:23,466 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-18 20:32:23,466 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-18 20:32:23,466 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/z3
[2022-11-18 20:32:23,469 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-18 20:32:23,490 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-11-18 20:36:57,819 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-18 20:36:58,054 INFO  L263         TraceCheckSpWp]: Trace formula consists of 24744 conjuncts, 30 conjunts are in the unsatisfiable core
[2022-11-18 20:36:58,151 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-18 20:37:15,461 INFO  L134       CoverageAnalysis]: Checked inductivity of 228 backedges. 228 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-18 20:37:15,461 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-11-18 20:37:15,462 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-18 20:37:15,462 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344241463]
[2022-11-18 20:37:15,462 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-18 20:37:15,462 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300350925]
[2022-11-18 20:37:15,462 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [300350925] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-18 20:37:15,463 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-18 20:37:15,463 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-11-18 20:37:15,463 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027718300]
[2022-11-18 20:37:15,464 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-18 20:37:15,466 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-11-18 20:37:15,466 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-18 20:37:15,467 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-11-18 20:37:15,467 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-11-18 20:37:15,469 INFO  L87              Difference]: Start difference. First operand 3572 states and 5946 transitions. Second operand  has 4 states, 4 states have (on average 596.5) internal successors, (2386), 4 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-18 20:37:17,515 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-18 20:37:17,516 INFO  L93              Difference]: Finished difference Result 9697 states and 16145 transitions.
[2022-11-18 20:37:17,516 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-11-18 20:37:17,517 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 596.5) internal successors, (2386), 4 states have internal predecessors, (2386), 0 states have call successors, (0), 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 2386
[2022-11-18 20:37:17,519 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-18 20:37:17,532 INFO  L225             Difference]: With dead ends: 9697
[2022-11-18 20:37:17,532 INFO  L226             Difference]: Without dead ends: 6463
[2022-11-18 20:37:17,537 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2386 GetRequests, 2383 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2022-11-18 20:37:17,538 INFO  L413           NwaCegarLoop]: 5239 mSDtfsCounter, 4511 mSDsluCounter, 10470 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4511 SdHoareTripleChecker+Valid, 15709 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time
[2022-11-18 20:37:17,539 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [4511 Valid, 15709 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time]
[2022-11-18 20:37:17,548 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6463 states.
[2022-11-18 20:37:17,630 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6463 to 4530.
[2022-11-18 20:37:17,638 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4530 states, 4529 states have (on average 1.6643850739677633) internal successors, (7538), 4529 states have internal predecessors, (7538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-18 20:37:17,647 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4530 states to 4530 states and 7538 transitions.
[2022-11-18 20:37:17,648 INFO  L78                 Accepts]: Start accepts. Automaton has 4530 states and 7538 transitions. Word has length 2386
[2022-11-18 20:37:17,649 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-18 20:37:17,650 INFO  L495      AbstractCegarLoop]: Abstraction has 4530 states and 7538 transitions.
[2022-11-18 20:37:17,651 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 596.5) internal successors, (2386), 4 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-18 20:37:17,651 INFO  L276                IsEmpty]: Start isEmpty. Operand 4530 states and 7538 transitions.
[2022-11-18 20:37:17,783 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2388
[2022-11-18 20:37:17,786 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-18 20:37:17,788 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2022-11-18 20:37:18,004 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forcibly destroying the process
[2022-11-18 20:37:18,037 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 137
[2022-11-18 20:37:18,037 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-18 20:37:18,037 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-18 20:37:18,039 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-18 20:37:18,040 INFO  L85        PathProgramCache]: Analyzing trace with hash 1398495391, now seen corresponding path program 1 times
[2022-11-18 20:37:18,041 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-18 20:37:18,041 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493638700]
[2022-11-18 20:37:18,041 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-18 20:37:18,041 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-18 20:37:19,195 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-18 20:37:19,196 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604793286]
[2022-11-18 20:37:19,196 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-18 20:37:19,197 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-18 20:37:19,197 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/z3
[2022-11-18 20:37:19,198 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-18 20:37:19,205 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed77574-1a53-41e1-b12f-4f04b643eda7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process