./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.collision.4.prop1-back-serstep.c --full-output --architecture 64bit


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


Checking for ERROR reachability
Using default analysis
Version 0e0057cc
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_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.collision.4.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --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 78c65132cf8567cb0e48833586d6715b235e5b9872da28c578d017ab5b668f03
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-11-29 02:34:42,941 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-29 02:34:43,007 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-29 02:34:43,012 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-29 02:34:43,013 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-29 02:34:43,038 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-29 02:34:43,038 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-29 02:34:43,039 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-29 02:34:43,039 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-29 02:34:43,040 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-29 02:34:43,041 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-29 02:34:43,041 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-29 02:34:43,042 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-29 02:34:43,042 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-29 02:34:43,043 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-29 02:34:43,043 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-29 02:34:43,044 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-29 02:34:43,044 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-29 02:34:43,045 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-29 02:34:43,045 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-29 02:34:43,046 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-29 02:34:43,047 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-29 02:34:43,047 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-29 02:34:43,047 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-29 02:34:43,048 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-29 02:34:43,048 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-29 02:34:43,049 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-29 02:34:43,049 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-29 02:34:43,050 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-29 02:34:43,050 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-29 02:34:43,051 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-29 02:34:43,051 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-29 02:34:43,051 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-29 02:34:43,052 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-29 02:34:43,052 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-29 02:34:43,052 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-29 02:34:43,053 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-29 02:34:43,053 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-29 02:34:43,053 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-29 02:34:43,053 INFO  L153        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_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/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_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness
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 -> 78c65132cf8567cb0e48833586d6715b235e5b9872da28c578d017ab5b668f03
[2023-11-29 02:34:43,247 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-29 02:34:43,266 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-29 02:34:43,268 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-29 02:34:43,269 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-29 02:34:43,270 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-29 02:34:43,271 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.collision.4.prop1-back-serstep.c
[2023-11-29 02:34:46,009 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-29 02:34:46,348 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-29 02:34:46,349 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.collision.4.prop1-back-serstep.c
[2023-11-29 02:34:46,371 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/data/e1ba89fbf/189415f899994e68b6b911626d2ff1c4/FLAGf6a349436
[2023-11-29 02:34:46,383 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/data/e1ba89fbf/189415f899994e68b6b911626d2ff1c4
[2023-11-29 02:34:46,386 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-29 02:34:46,387 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-29 02:34:46,388 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-29 02:34:46,389 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-29 02:34:46,397 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-29 02:34:46,398 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:34:46" (1/1) ...
[2023-11-29 02:34:46,399 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bae0ea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:34:46, skipping insertion in model container
[2023-11-29 02:34:46,399 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:34:46" (1/1) ...
[2023-11-29 02:34:46,513 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-29 02:34:46,728 WARN  L240   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_a065674d-0970-463b-9db1-55c1beb291ce/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.collision.4.prop1-back-serstep.c[1177,1190]
[2023-11-29 02:34:47,165 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-29 02:34:47,174 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-29 02:34:47,186 WARN  L240   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_a065674d-0970-463b-9db1-55c1beb291ce/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.collision.4.prop1-back-serstep.c[1177,1190]
[2023-11-29 02:34:47,574 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-29 02:34:47,589 INFO  L206         MainTranslator]: Completed translation
[2023-11-29 02:34:47,589 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:34:47 WrapperNode
[2023-11-29 02:34:47,589 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-29 02:34:47,590 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-29 02:34:47,591 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-29 02:34:47,591 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-29 02:34:47,598 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:34:47" (1/1) ...
[2023-11-29 02:34:47,711 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:34:47" (1/1) ...
[2023-11-29 02:34:48,835 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 18118
[2023-11-29 02:34:48,835 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-29 02:34:48,836 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-29 02:34:48,836 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-29 02:34:48,836 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-29 02:34:48,844 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:34:47" (1/1) ...
[2023-11-29 02:34:48,844 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:34:47" (1/1) ...
[2023-11-29 02:34:49,169 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:34:47" (1/1) ...
[2023-11-29 02:34:49,387 INFO  L175           MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0].
[2023-11-29 02:34:49,388 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:34:47" (1/1) ...
[2023-11-29 02:34:49,388 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:34:47" (1/1) ...
[2023-11-29 02:34:49,664 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:34:47" (1/1) ...
[2023-11-29 02:34:49,781 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:34:47" (1/1) ...
[2023-11-29 02:34:49,859 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:34:47" (1/1) ...
[2023-11-29 02:34:49,911 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:34:47" (1/1) ...
[2023-11-29 02:34:50,146 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-29 02:34:50,147 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-29 02:34:50,147 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-29 02:34:50,147 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-29 02:34:50,148 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:34:47" (1/1) ...
[2023-11-29 02:34:50,152 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-29 02:34:50,163 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:34:50,176 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2023-11-29 02:34:50,181 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2023-11-29 02:34:50,209 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-29 02:34:50,209 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-11-29 02:34:50,209 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-29 02:34:50,209 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-29 02:34:50,999 INFO  L241             CfgBuilder]: Building ICFG
[2023-11-29 02:34:51,002 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-29 02:35:01,889 INFO  L282             CfgBuilder]: Performing block encoding
[2023-11-29 02:35:02,095 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-29 02:35:02,096 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-29 02:35:02,098 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:35:02 BoogieIcfgContainer
[2023-11-29 02:35:02,098 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-29 02:35:02,100 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-29 02:35:02,100 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-29 02:35:02,103 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-29 02:35:02,103 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:34:46" (1/3) ...
[2023-11-29 02:35:02,104 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bdf42ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:35:02, skipping insertion in model container
[2023-11-29 02:35:02,104 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:34:47" (2/3) ...
[2023-11-29 02:35:02,104 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bdf42ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:35:02, skipping insertion in model container
[2023-11-29 02:35:02,104 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:35:02" (3/3) ...
[2023-11-29 02:35:02,106 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.collision.4.prop1-back-serstep.c
[2023-11-29 02:35:02,119 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-29 02:35:02,119 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-29 02:35:02,223 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-29 02:35:02,229 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=LoopHeads, 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;@a1d496f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-29 02:35:02,230 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-29 02:35:02,246 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 4606 states, 4604 states have (on average 1.6772371850564727) internal successors, (7722), 4605 states have internal predecessors, (7722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:02,272 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 375
[2023-11-29 02:35:02,272 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:35:02,273 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:35:02,274 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:35:02,278 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:35:02,278 INFO  L85        PathProgramCache]: Analyzing trace with hash -235180906, now seen corresponding path program 1 times
[2023-11-29 02:35:02,285 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:35:02,286 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409753302]
[2023-11-29 02:35:02,286 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:02,286 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:35:02,794 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:35:04,531 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:35:04,531 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:35:04,532 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409753302]
[2023-11-29 02:35:04,533 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409753302] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:35:04,533 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:35:04,533 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:35:04,535 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069115511]
[2023-11-29 02:35:04,535 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:35:04,541 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:35:04,541 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:35:04,571 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:35:04,572 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:04,587 INFO  L87              Difference]: Start difference. First operand  has 4606 states, 4604 states have (on average 1.6772371850564727) internal successors, (7722), 4605 states have internal predecessors, (7722), 0 states have call successors, (0), 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 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:04,926 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:35:04,926 INFO  L93              Difference]: Finished difference Result 9079 states and 15225 transitions.
[2023-11-29 02:35:04,927 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:35:04,928 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 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 374
[2023-11-29 02:35:04,930 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:35:04,962 INFO  L225             Difference]: With dead ends: 9079
[2023-11-29 02:35:04,963 INFO  L226             Difference]: Without dead ends: 4606
[2023-11-29 02:35:04,972 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:04,975 INFO  L413           NwaCegarLoop]: 7715 mSDtfsCounter, 1 mSDsluCounter, 15425 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 23140 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:35:04,976 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 23140 Invalid, 13 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:35:04,997 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4606 states.
[2023-11-29 02:35:05,086 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4606 to 4606.
[2023-11-29 02:35:05,096 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4606 states, 4605 states have (on average 1.6764386536373508) internal successors, (7720), 4605 states have internal predecessors, (7720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:05,108 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4606 states to 4606 states and 7720 transitions.
[2023-11-29 02:35:05,109 INFO  L78                 Accepts]: Start accepts. Automaton has 4606 states and 7720 transitions. Word has length 374
[2023-11-29 02:35:05,111 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:35:05,111 INFO  L495      AbstractCegarLoop]: Abstraction has 4606 states and 7720 transitions.
[2023-11-29 02:35:05,111 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:05,112 INFO  L276                IsEmpty]: Start isEmpty. Operand 4606 states and 7720 transitions.
[2023-11-29 02:35:05,116 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 376
[2023-11-29 02:35:05,116 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:35:05,117 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:35:05,117 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-29 02:35:05,117 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:35:05,118 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:35:05,118 INFO  L85        PathProgramCache]: Analyzing trace with hash 1301053674, now seen corresponding path program 1 times
[2023-11-29 02:35:05,118 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:35:05,118 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837844924]
[2023-11-29 02:35:05,118 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:05,119 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:35:05,270 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:35:05,745 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:35:05,745 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:35:05,745 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837844924]
[2023-11-29 02:35:05,746 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837844924] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:35:05,746 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:35:05,746 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:35:05,746 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794223752]
[2023-11-29 02:35:05,746 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:35:05,748 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:35:05,749 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:35:05,749 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:35:05,750 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:05,750 INFO  L87              Difference]: Start difference. First operand 4606 states and 7720 transitions. Second operand  has 4 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:05,926 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:35:05,926 INFO  L93              Difference]: Finished difference Result 9082 states and 15223 transitions.
[2023-11-29 02:35:05,926 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:35:05,927 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 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 375
[2023-11-29 02:35:05,928 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:35:05,946 INFO  L225             Difference]: With dead ends: 9082
[2023-11-29 02:35:05,947 INFO  L226             Difference]: Without dead ends: 4609
[2023-11-29 02:35:05,951 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:05,953 INFO  L413           NwaCegarLoop]: 7715 mSDtfsCounter, 1 mSDsluCounter, 15423 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 23138 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:35:05,953 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 23138 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:35:05,961 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4609 states.
[2023-11-29 02:35:06,011 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4609 to 4608.
[2023-11-29 02:35:06,019 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4608 states, 4607 states have (on average 1.6761449967440851) internal successors, (7722), 4607 states have internal predecessors, (7722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:06,031 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4608 states to 4608 states and 7722 transitions.
[2023-11-29 02:35:06,031 INFO  L78                 Accepts]: Start accepts. Automaton has 4608 states and 7722 transitions. Word has length 375
[2023-11-29 02:35:06,032 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:35:06,032 INFO  L495      AbstractCegarLoop]: Abstraction has 4608 states and 7722 transitions.
[2023-11-29 02:35:06,032 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:06,032 INFO  L276                IsEmpty]: Start isEmpty. Operand 4608 states and 7722 transitions.
[2023-11-29 02:35:06,036 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 377
[2023-11-29 02:35:06,036 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:35:06,037 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:35:06,037 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-29 02:35:06,037 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:35:06,038 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:35:06,038 INFO  L85        PathProgramCache]: Analyzing trace with hash 1467527984, now seen corresponding path program 1 times
[2023-11-29 02:35:06,038 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:35:06,038 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748772569]
[2023-11-29 02:35:06,038 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:06,039 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:35:06,161 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:35:06,645 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:35:06,645 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:35:06,645 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748772569]
[2023-11-29 02:35:06,645 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748772569] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:35:06,645 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:35:06,646 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:35:06,646 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710744554]
[2023-11-29 02:35:06,646 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:35:06,647 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:35:06,647 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:35:06,648 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:35:06,649 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:06,649 INFO  L87              Difference]: Start difference. First operand 4608 states and 7722 transitions. Second operand  has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:06,921 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:35:06,921 INFO  L93              Difference]: Finished difference Result 13552 states and 22715 transitions.
[2023-11-29 02:35:06,922 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 02:35:06,922 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 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 376
[2023-11-29 02:35:06,923 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:35:06,960 INFO  L225             Difference]: With dead ends: 13552
[2023-11-29 02:35:06,960 INFO  L226             Difference]: Without dead ends: 9077
[2023-11-29 02:35:06,967 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
[2023-11-29 02:35:06,968 INFO  L413           NwaCegarLoop]: 8410 mSDtfsCounter, 7488 mSDsluCounter, 16116 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7488 SdHoareTripleChecker+Valid, 24526 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:35:06,969 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [7488 Valid, 24526 Invalid, 19 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:35:06,982 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9077 states.
[2023-11-29 02:35:07,075 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9077 to 4610.
[2023-11-29 02:35:07,084 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4610 states, 4609 states have (on average 1.67585159470601) internal successors, (7724), 4609 states have internal predecessors, (7724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:07,101 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 7724 transitions.
[2023-11-29 02:35:07,101 INFO  L78                 Accepts]: Start accepts. Automaton has 4610 states and 7724 transitions. Word has length 376
[2023-11-29 02:35:07,102 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:35:07,102 INFO  L495      AbstractCegarLoop]: Abstraction has 4610 states and 7724 transitions.
[2023-11-29 02:35:07,103 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:07,103 INFO  L276                IsEmpty]: Start isEmpty. Operand 4610 states and 7724 transitions.
[2023-11-29 02:35:07,111 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 378
[2023-11-29 02:35:07,111 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:35:07,112 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:35:07,112 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-29 02:35:07,112 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:35:07,113 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:35:07,113 INFO  L85        PathProgramCache]: Analyzing trace with hash -151363760, now seen corresponding path program 1 times
[2023-11-29 02:35:07,113 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:35:07,113 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323427366]
[2023-11-29 02:35:07,114 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:07,114 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:35:07,362 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:35:08,165 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:35:08,165 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:35:08,165 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323427366]
[2023-11-29 02:35:08,165 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323427366] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:35:08,166 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:35:08,166 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-11-29 02:35:08,166 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401381873]
[2023-11-29 02:35:08,166 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:35:08,167 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-29 02:35:08,167 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:35:08,168 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-29 02:35:08,168 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2023-11-29 02:35:08,169 INFO  L87              Difference]: Start difference. First operand 4610 states and 7724 transitions. Second operand  has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 5 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:08,744 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:35:08,745 INFO  L93              Difference]: Finished difference Result 13975 states and 23416 transitions.
[2023-11-29 02:35:08,745 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 02:35:08,745 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 5 states have internal predecessors, (377), 0 states have call successors, (0), 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 377
[2023-11-29 02:35:08,746 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:35:08,794 INFO  L225             Difference]: With dead ends: 13975
[2023-11-29 02:35:08,794 INFO  L226             Difference]: Without dead ends: 9498
[2023-11-29 02:35:08,802 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72
[2023-11-29 02:35:08,803 INFO  L413           NwaCegarLoop]: 8409 mSDtfsCounter, 30512 mSDsluCounter, 23829 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30512 SdHoareTripleChecker+Valid, 32238 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:35:08,803 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [30512 Valid, 32238 Invalid, 26 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:35:08,818 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9498 states.
[2023-11-29 02:35:08,935 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9498 to 5027.
[2023-11-29 02:35:08,944 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5027 states, 5026 states have (on average 1.6750895344210108) internal successors, (8419), 5026 states have internal predecessors, (8419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:08,959 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5027 states to 5027 states and 8419 transitions.
[2023-11-29 02:35:08,959 INFO  L78                 Accepts]: Start accepts. Automaton has 5027 states and 8419 transitions. Word has length 377
[2023-11-29 02:35:08,960 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:35:08,960 INFO  L495      AbstractCegarLoop]: Abstraction has 5027 states and 8419 transitions.
[2023-11-29 02:35:08,960 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 5 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:08,960 INFO  L276                IsEmpty]: Start isEmpty. Operand 5027 states and 8419 transitions.
[2023-11-29 02:35:09,152 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3115
[2023-11-29 02:35:09,152 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:35:09,154 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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]
[2023-11-29 02:35:09,155 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-11-29 02:35:09,155 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:35:09,155 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:35:09,157 INFO  L85        PathProgramCache]: Analyzing trace with hash -1434486012, now seen corresponding path program 1 times
[2023-11-29 02:35:09,157 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:35:09,157 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351587527]
[2023-11-29 02:35:09,158 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:09,158 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:35:09,537 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:35:09,537 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [806139790]
[2023-11-29 02:35:09,538 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:09,538 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:35:09,538 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:35:09,542 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:35:09,545 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-29 02:35:12,981 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:35:13,051 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12626 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:35:13,142 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:35:13,487 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:35:13,487 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:35:13,488 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:35:13,488 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351587527]
[2023-11-29 02:35:13,488 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:35:13,488 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806139790]
[2023-11-29 02:35:13,489 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [806139790] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:35:13,489 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:35:13,490 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:35:13,490 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500342792]
[2023-11-29 02:35:13,491 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:35:13,497 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:35:13,497 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:35:13,503 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:35:13,504 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:13,506 INFO  L87              Difference]: Start difference. First operand 5027 states and 8419 transitions. Second operand  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:13,779 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:35:13,780 INFO  L93              Difference]: Finished difference Result 9514 states and 15938 transitions.
[2023-11-29 02:35:13,780 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:35:13,782 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 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 3114
[2023-11-29 02:35:13,783 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:35:13,795 INFO  L225             Difference]: With dead ends: 9514
[2023-11-29 02:35:13,796 INFO  L226             Difference]: Without dead ends: 5037
[2023-11-29 02:35:13,802 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3113 GetRequests, 3111 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:13,803 INFO  L413           NwaCegarLoop]: 7715 mSDtfsCounter, 12 mSDsluCounter, 15420 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23135 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:35:13,804 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23135 Invalid, 18 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:35:13,815 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5037 states.
[2023-11-29 02:35:13,922 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5037 to 5029.
[2023-11-29 02:35:13,931 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5029 states, 5028 states have (on average 1.6748210023866348) internal successors, (8421), 5028 states have internal predecessors, (8421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:13,946 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5029 states to 5029 states and 8421 transitions.
[2023-11-29 02:35:13,947 INFO  L78                 Accepts]: Start accepts. Automaton has 5029 states and 8421 transitions. Word has length 3114
[2023-11-29 02:35:13,948 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:35:13,949 INFO  L495      AbstractCegarLoop]: Abstraction has 5029 states and 8421 transitions.
[2023-11-29 02:35:13,951 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:13,951 INFO  L276                IsEmpty]: Start isEmpty. Operand 5029 states and 8421 transitions.
[2023-11-29 02:35:14,096 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3115
[2023-11-29 02:35:14,096 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:35:14,099 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:35:14,131 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-29 02:35:14,299 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:35:14,300 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:35:14,300 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:35:14,302 INFO  L85        PathProgramCache]: Analyzing trace with hash 1556640850, now seen corresponding path program 1 times
[2023-11-29 02:35:14,302 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:35:14,303 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087070174]
[2023-11-29 02:35:14,303 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:14,304 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:35:14,827 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:35:14,827 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [76151717]
[2023-11-29 02:35:14,828 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:14,828 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:35:14,828 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:35:14,829 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:35:14,832 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-29 02:35:18,128 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:35:18,194 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12627 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:35:18,256 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:35:18,368 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:35:18,368 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:35:18,369 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:35:18,369 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087070174]
[2023-11-29 02:35:18,369 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:35:18,369 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76151717]
[2023-11-29 02:35:18,369 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [76151717] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:35:18,369 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:35:18,370 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:35:18,371 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247967525]
[2023-11-29 02:35:18,371 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:35:18,375 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:35:18,376 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:35:18,378 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:35:18,378 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:18,379 INFO  L87              Difference]: Start difference. First operand 5029 states and 8421 transitions. Second operand  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:18,531 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:35:18,531 INFO  L93              Difference]: Finished difference Result 9517 states and 15940 transitions.
[2023-11-29 02:35:18,531 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:35:18,533 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 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 3114
[2023-11-29 02:35:18,534 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:35:18,541 INFO  L225             Difference]: With dead ends: 9517
[2023-11-29 02:35:18,541 INFO  L226             Difference]: Without dead ends: 5038
[2023-11-29 02:35:18,546 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3113 GetRequests, 3111 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:18,547 INFO  L413           NwaCegarLoop]: 7715 mSDtfsCounter, 12 mSDsluCounter, 15420 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23135 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:35:18,547 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23135 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:35:18,555 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5038 states.
[2023-11-29 02:35:18,609 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5038 to 5030.
[2023-11-29 02:35:18,615 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5030 states, 5029 states have (on average 1.674686816464506) internal successors, (8422), 5029 states have internal predecessors, (8422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:18,623 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5030 states to 5030 states and 8422 transitions.
[2023-11-29 02:35:18,623 INFO  L78                 Accepts]: Start accepts. Automaton has 5030 states and 8422 transitions. Word has length 3114
[2023-11-29 02:35:18,624 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:35:18,624 INFO  L495      AbstractCegarLoop]: Abstraction has 5030 states and 8422 transitions.
[2023-11-29 02:35:18,626 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:18,626 INFO  L276                IsEmpty]: Start isEmpty. Operand 5030 states and 8422 transitions.
[2023-11-29 02:35:18,674 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3115
[2023-11-29 02:35:18,674 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:35:18,676 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:35:18,707 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2023-11-29 02:35:18,876 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5
[2023-11-29 02:35:18,877 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:35:18,877 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:35:18,878 INFO  L85        PathProgramCache]: Analyzing trace with hash -2037187424, now seen corresponding path program 1 times
[2023-11-29 02:35:18,878 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:35:18,878 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763180854]
[2023-11-29 02:35:18,878 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:18,878 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:35:19,226 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:35:19,226 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067512128]
[2023-11-29 02:35:19,227 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:19,227 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:35:19,227 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:35:19,228 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:35:19,230 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-29 02:35:21,960 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:35:22,027 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12628 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:35:22,067 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:35:22,135 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:35:22,135 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:35:22,135 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:35:22,135 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763180854]
[2023-11-29 02:35:22,135 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:35:22,135 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067512128]
[2023-11-29 02:35:22,135 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067512128] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:35:22,135 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:35:22,136 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:35:22,136 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998023640]
[2023-11-29 02:35:22,136 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:35:22,139 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:35:22,139 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:35:22,141 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:35:22,141 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:22,142 INFO  L87              Difference]: Start difference. First operand 5030 states and 8422 transitions. Second operand  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:22,325 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:35:22,325 INFO  L93              Difference]: Finished difference Result 9519 states and 15942 transitions.
[2023-11-29 02:35:22,326 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:35:22,328 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 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 3114
[2023-11-29 02:35:22,329 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:35:22,338 INFO  L225             Difference]: With dead ends: 9519
[2023-11-29 02:35:22,338 INFO  L226             Difference]: Without dead ends: 5039
[2023-11-29 02:35:22,344 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3113 GetRequests, 3111 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:22,345 INFO  L413           NwaCegarLoop]: 7715 mSDtfsCounter, 12 mSDsluCounter, 15420 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23135 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:35:22,345 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23135 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:35:22,353 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5039 states.
[2023-11-29 02:35:22,419 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5039 to 5031.
[2023-11-29 02:35:22,427 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5031 states, 5030 states have (on average 1.6745526838966203) internal successors, (8423), 5030 states have internal predecessors, (8423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:22,437 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5031 states to 5031 states and 8423 transitions.
[2023-11-29 02:35:22,438 INFO  L78                 Accepts]: Start accepts. Automaton has 5031 states and 8423 transitions. Word has length 3114
[2023-11-29 02:35:22,439 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:35:22,439 INFO  L495      AbstractCegarLoop]: Abstraction has 5031 states and 8423 transitions.
[2023-11-29 02:35:22,441 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:22,441 INFO  L276                IsEmpty]: Start isEmpty. Operand 5031 states and 8423 transitions.
[2023-11-29 02:35:22,517 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3115
[2023-11-29 02:35:22,517 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:35:22,520 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:35:22,559 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2023-11-29 02:35:22,720 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:35:22,721 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:35:22,721 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:35:22,722 INFO  L85        PathProgramCache]: Analyzing trace with hash 1948630290, now seen corresponding path program 1 times
[2023-11-29 02:35:22,722 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:35:22,723 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34224318]
[2023-11-29 02:35:22,723 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:22,723 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:35:23,055 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:35:23,055 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136639780]
[2023-11-29 02:35:23,056 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:23,056 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:35:23,056 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:35:23,057 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:35:23,058 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-29 02:35:25,656 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:35:25,722 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12629 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:35:25,773 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:35:25,877 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:35:25,877 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:35:25,877 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:35:25,878 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34224318]
[2023-11-29 02:35:25,878 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:35:25,878 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136639780]
[2023-11-29 02:35:25,878 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136639780] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:35:25,878 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:35:25,879 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:35:25,879 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2797648]
[2023-11-29 02:35:25,879 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:35:25,883 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:35:25,884 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:35:25,887 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:35:25,888 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:25,889 INFO  L87              Difference]: Start difference. First operand 5031 states and 8423 transitions. Second operand  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:26,069 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:35:26,070 INFO  L93              Difference]: Finished difference Result 9521 states and 15944 transitions.
[2023-11-29 02:35:26,070 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:35:26,071 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 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 3114
[2023-11-29 02:35:26,073 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:35:26,083 INFO  L225             Difference]: With dead ends: 9521
[2023-11-29 02:35:26,083 INFO  L226             Difference]: Without dead ends: 5040
[2023-11-29 02:35:26,089 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3113 GetRequests, 3111 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:26,089 INFO  L413           NwaCegarLoop]: 7715 mSDtfsCounter, 12 mSDsluCounter, 15420 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23135 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:35:26,090 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23135 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:35:26,097 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5040 states.
[2023-11-29 02:35:26,163 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5040 to 5032.
[2023-11-29 02:35:26,171 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5032 states, 5031 states have (on average 1.6744186046511629) internal successors, (8424), 5031 states have internal predecessors, (8424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:26,181 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5032 states to 5032 states and 8424 transitions.
[2023-11-29 02:35:26,181 INFO  L78                 Accepts]: Start accepts. Automaton has 5032 states and 8424 transitions. Word has length 3114
[2023-11-29 02:35:26,183 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:35:26,183 INFO  L495      AbstractCegarLoop]: Abstraction has 5032 states and 8424 transitions.
[2023-11-29 02:35:26,184 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:26,184 INFO  L276                IsEmpty]: Start isEmpty. Operand 5032 states and 8424 transitions.
[2023-11-29 02:35:26,260 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3115
[2023-11-29 02:35:26,260 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:35:26,262 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:35:26,300 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0
[2023-11-29 02:35:26,463 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:35:26,464 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:35:26,464 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:35:26,465 INFO  L85        PathProgramCache]: Analyzing trace with hash -1014743072, now seen corresponding path program 1 times
[2023-11-29 02:35:26,465 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:35:26,465 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978715290]
[2023-11-29 02:35:26,466 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:26,466 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:35:26,713 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:35:26,714 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [888555515]
[2023-11-29 02:35:26,714 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:26,714 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:35:26,715 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:35:26,717 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:35:26,719 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-29 02:35:29,420 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:35:29,490 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12630 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:35:29,524 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:35:29,599 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:35:29,599 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:35:29,599 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:35:29,599 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978715290]
[2023-11-29 02:35:29,599 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:35:29,599 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888555515]
[2023-11-29 02:35:29,599 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [888555515] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:35:29,599 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:35:29,601 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:35:29,601 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975525052]
[2023-11-29 02:35:29,601 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:35:29,603 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:35:29,603 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:35:29,606 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:35:29,606 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:29,607 INFO  L87              Difference]: Start difference. First operand 5032 states and 8424 transitions. Second operand  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:29,792 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:35:29,792 INFO  L93              Difference]: Finished difference Result 9523 states and 15946 transitions.
[2023-11-29 02:35:29,794 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:35:29,795 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 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 3114
[2023-11-29 02:35:29,797 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:35:29,806 INFO  L225             Difference]: With dead ends: 9523
[2023-11-29 02:35:29,807 INFO  L226             Difference]: Without dead ends: 5041
[2023-11-29 02:35:29,810 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3113 GetRequests, 3111 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:29,811 INFO  L413           NwaCegarLoop]: 7715 mSDtfsCounter, 12 mSDsluCounter, 15420 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23135 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:35:29,811 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23135 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:35:29,817 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5041 states.
[2023-11-29 02:35:29,862 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5041 to 5033.
[2023-11-29 02:35:29,867 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5033 states, 5032 states have (on average 1.6742845786963434) internal successors, (8425), 5032 states have internal predecessors, (8425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:29,875 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5033 states to 5033 states and 8425 transitions.
[2023-11-29 02:35:29,875 INFO  L78                 Accepts]: Start accepts. Automaton has 5033 states and 8425 transitions. Word has length 3114
[2023-11-29 02:35:29,877 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:35:29,877 INFO  L495      AbstractCegarLoop]: Abstraction has 5033 states and 8425 transitions.
[2023-11-29 02:35:29,878 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:29,878 INFO  L276                IsEmpty]: Start isEmpty. Operand 5033 states and 8425 transitions.
[2023-11-29 02:35:29,924 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3115
[2023-11-29 02:35:29,924 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:35:29,926 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:35:29,957 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0
[2023-11-29 02:35:30,126 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:35:30,127 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:35:30,127 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:35:30,128 INFO  L85        PathProgramCache]: Analyzing trace with hash 1401085650, now seen corresponding path program 1 times
[2023-11-29 02:35:30,128 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:35:30,128 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505410714]
[2023-11-29 02:35:30,129 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:30,129 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:35:30,340 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:35:30,340 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [866478284]
[2023-11-29 02:35:30,341 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:30,341 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:35:30,341 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:35:30,342 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:35:30,343 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-29 02:35:33,025 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:35:33,093 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12631 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:35:33,141 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:35:33,228 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:35:33,228 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:35:33,228 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:35:33,228 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505410714]
[2023-11-29 02:35:33,228 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:35:33,228 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866478284]
[2023-11-29 02:35:33,229 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [866478284] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:35:33,229 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:35:33,230 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:35:33,230 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609234240]
[2023-11-29 02:35:33,230 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:35:33,234 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:35:33,234 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:35:33,238 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:35:33,238 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:33,239 INFO  L87              Difference]: Start difference. First operand 5033 states and 8425 transitions. Second operand  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:33,370 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:35:33,370 INFO  L93              Difference]: Finished difference Result 9525 states and 15948 transitions.
[2023-11-29 02:35:33,371 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:35:33,372 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 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 3114
[2023-11-29 02:35:33,375 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:35:33,384 INFO  L225             Difference]: With dead ends: 9525
[2023-11-29 02:35:33,384 INFO  L226             Difference]: Without dead ends: 5042
[2023-11-29 02:35:33,389 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3113 GetRequests, 3111 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:33,390 INFO  L413           NwaCegarLoop]: 7715 mSDtfsCounter, 12 mSDsluCounter, 15420 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23135 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:35:33,390 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23135 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:35:33,398 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5042 states.
[2023-11-29 02:35:33,464 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5042 to 5034.
[2023-11-29 02:35:33,471 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5034 states, 5033 states have (on average 1.6741506060003974) internal successors, (8426), 5033 states have internal predecessors, (8426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:33,482 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5034 states to 5034 states and 8426 transitions.
[2023-11-29 02:35:33,482 INFO  L78                 Accepts]: Start accepts. Automaton has 5034 states and 8426 transitions. Word has length 3114
[2023-11-29 02:35:33,484 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:35:33,485 INFO  L495      AbstractCegarLoop]: Abstraction has 5034 states and 8426 transitions.
[2023-11-29 02:35:33,486 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:33,486 INFO  L276                IsEmpty]: Start isEmpty. Operand 5034 states and 8426 transitions.
[2023-11-29 02:35:33,557 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3115
[2023-11-29 02:35:33,557 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:35:33,559 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:35:33,599 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0
[2023-11-29 02:35:33,772 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:35:33,773 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:35:33,773 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:35:33,774 INFO  L85        PathProgramCache]: Analyzing trace with hash -1356980960, now seen corresponding path program 1 times
[2023-11-29 02:35:33,774 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:35:33,774 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668512161]
[2023-11-29 02:35:33,775 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:33,775 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:35:34,062 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:35:34,062 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606723483]
[2023-11-29 02:35:34,063 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:34,063 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:35:34,063 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:35:34,064 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:35:34,069 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-29 02:35:36,667 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:35:36,733 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12632 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:35:36,765 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:35:36,832 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:35:36,832 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:35:36,833 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:35:36,833 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668512161]
[2023-11-29 02:35:36,833 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:35:36,833 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606723483]
[2023-11-29 02:35:36,833 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [606723483] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:35:36,833 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:35:36,834 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:35:36,834 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411628582]
[2023-11-29 02:35:36,834 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:35:36,838 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:35:36,839 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:35:36,842 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:35:36,842 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:36,843 INFO  L87              Difference]: Start difference. First operand 5034 states and 8426 transitions. Second operand  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:36,955 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:35:36,955 INFO  L93              Difference]: Finished difference Result 9527 states and 15950 transitions.
[2023-11-29 02:35:36,955 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:35:36,956 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 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 3114
[2023-11-29 02:35:36,958 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:35:36,963 INFO  L225             Difference]: With dead ends: 9527
[2023-11-29 02:35:36,963 INFO  L226             Difference]: Without dead ends: 5043
[2023-11-29 02:35:36,969 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3113 GetRequests, 3111 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:36,969 INFO  L413           NwaCegarLoop]: 7715 mSDtfsCounter, 12 mSDsluCounter, 15420 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23135 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:35:36,969 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23135 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:35:36,975 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5043 states.
[2023-11-29 02:35:37,017 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5043 to 5035.
[2023-11-29 02:35:37,023 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5035 states, 5034 states have (on average 1.6740166865315853) internal successors, (8427), 5034 states have internal predecessors, (8427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:37,030 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5035 states to 5035 states and 8427 transitions.
[2023-11-29 02:35:37,030 INFO  L78                 Accepts]: Start accepts. Automaton has 5035 states and 8427 transitions. Word has length 3114
[2023-11-29 02:35:37,032 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:35:37,032 INFO  L495      AbstractCegarLoop]: Abstraction has 5035 states and 8427 transitions.
[2023-11-29 02:35:37,033 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:37,033 INFO  L276                IsEmpty]: Start isEmpty. Operand 5035 states and 8427 transitions.
[2023-11-29 02:35:37,078 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3115
[2023-11-29 02:35:37,078 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:35:37,080 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:35:37,111 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0
[2023-11-29 02:35:37,280 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10
[2023-11-29 02:35:37,281 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:35:37,281 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:35:37,282 INFO  L85        PathProgramCache]: Analyzing trace with hash 291102830, now seen corresponding path program 1 times
[2023-11-29 02:35:37,282 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:35:37,282 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742794865]
[2023-11-29 02:35:37,283 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:37,283 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:35:37,492 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:35:37,492 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2020378141]
[2023-11-29 02:35:37,493 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:37,493 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:35:37,493 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:35:37,494 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:35:37,495 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-11-29 02:35:40,023 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:35:40,088 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12633 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:35:40,120 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:35:40,184 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:35:40,184 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:35:40,184 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:35:40,184 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742794865]
[2023-11-29 02:35:40,184 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:35:40,184 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020378141]
[2023-11-29 02:35:40,184 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020378141] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:35:40,184 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:35:40,185 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:35:40,186 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062593824]
[2023-11-29 02:35:40,186 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:35:40,190 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:35:40,190 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:35:40,193 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:35:40,193 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:40,194 INFO  L87              Difference]: Start difference. First operand 5035 states and 8427 transitions. Second operand  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:40,306 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:35:40,306 INFO  L93              Difference]: Finished difference Result 9529 states and 15952 transitions.
[2023-11-29 02:35:40,307 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:35:40,308 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 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 3114
[2023-11-29 02:35:40,309 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:35:40,314 INFO  L225             Difference]: With dead ends: 9529
[2023-11-29 02:35:40,314 INFO  L226             Difference]: Without dead ends: 5044
[2023-11-29 02:35:40,318 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3113 GetRequests, 3111 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:40,319 INFO  L413           NwaCegarLoop]: 7715 mSDtfsCounter, 12 mSDsluCounter, 15420 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23135 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:35:40,319 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23135 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:35:40,325 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5044 states.
[2023-11-29 02:35:40,367 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5044 to 5036.
[2023-11-29 02:35:40,372 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5036 states, 5035 states have (on average 1.6738828202581926) internal successors, (8428), 5035 states have internal predecessors, (8428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:40,379 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5036 states to 5036 states and 8428 transitions.
[2023-11-29 02:35:40,379 INFO  L78                 Accepts]: Start accepts. Automaton has 5036 states and 8428 transitions. Word has length 3114
[2023-11-29 02:35:40,380 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:35:40,380 INFO  L495      AbstractCegarLoop]: Abstraction has 5036 states and 8428 transitions.
[2023-11-29 02:35:40,381 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:40,381 INFO  L276                IsEmpty]: Start isEmpty. Operand 5036 states and 8428 transitions.
[2023-11-29 02:35:40,426 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3115
[2023-11-29 02:35:40,426 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:35:40,428 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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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]
[2023-11-29 02:35:40,460 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0
[2023-11-29 02:35:40,629 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11
[2023-11-29 02:35:40,629 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:35:40,629 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:35:40,630 INFO  L85        PathProgramCache]: Analyzing trace with hash 2028373216, now seen corresponding path program 1 times
[2023-11-29 02:35:40,630 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:35:40,631 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762164514]
[2023-11-29 02:35:40,631 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:40,631 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:35:40,857 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:35:40,857 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [632144734]
[2023-11-29 02:35:40,858 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:40,858 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:35:40,858 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:35:40,859 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:35:40,860 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-11-29 02:35:43,576 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:35:43,641 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12634 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:35:43,672 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:35:43,733 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:35:43,733 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:35:43,733 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:35:43,733 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762164514]
[2023-11-29 02:35:43,733 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:35:43,733 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632144734]
[2023-11-29 02:35:43,734 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [632144734] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:35:43,734 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:35:43,735 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:35:43,735 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513784578]
[2023-11-29 02:35:43,735 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:35:43,738 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:35:43,738 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:35:43,741 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:35:43,741 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:43,742 INFO  L87              Difference]: Start difference. First operand 5036 states and 8428 transitions. Second operand  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:43,846 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:35:43,846 INFO  L93              Difference]: Finished difference Result 9531 states and 15954 transitions.
[2023-11-29 02:35:43,847 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:35:43,847 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 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 3114
[2023-11-29 02:35:43,849 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:35:43,854 INFO  L225             Difference]: With dead ends: 9531
[2023-11-29 02:35:43,854 INFO  L226             Difference]: Without dead ends: 5045
[2023-11-29 02:35:43,859 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3113 GetRequests, 3111 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:43,860 INFO  L413           NwaCegarLoop]: 7715 mSDtfsCounter, 12 mSDsluCounter, 15420 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23135 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:35:43,860 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23135 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:35:43,868 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5045 states.
[2023-11-29 02:35:43,933 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5045 to 5037.
[2023-11-29 02:35:43,939 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5037 states, 5036 states have (on average 1.6737490071485306) internal successors, (8429), 5036 states have internal predecessors, (8429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:43,951 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5037 states to 5037 states and 8429 transitions.
[2023-11-29 02:35:43,951 INFO  L78                 Accepts]: Start accepts. Automaton has 5037 states and 8429 transitions. Word has length 3114
[2023-11-29 02:35:43,952 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:35:43,952 INFO  L495      AbstractCegarLoop]: Abstraction has 5037 states and 8429 transitions.
[2023-11-29 02:35:43,954 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:43,954 INFO  L276                IsEmpty]: Start isEmpty. Operand 5037 states and 8429 transitions.
[2023-11-29 02:35:44,025 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3115
[2023-11-29 02:35:44,026 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:35:44,028 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:35:44,068 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0
[2023-11-29 02:35:44,229 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12
[2023-11-29 02:35:44,229 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:35:44,230 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:35:44,231 INFO  L85        PathProgramCache]: Analyzing trace with hash 41993298, now seen corresponding path program 1 times
[2023-11-29 02:35:44,231 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:35:44,231 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287056435]
[2023-11-29 02:35:44,231 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:44,231 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:35:44,442 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:35:44,443 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549537820]
[2023-11-29 02:35:44,443 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:44,443 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:35:44,444 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:35:44,444 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:35:44,447 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2023-11-29 02:35:47,081 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:35:47,147 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12635 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:35:47,179 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:35:47,245 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:35:47,245 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:35:47,245 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:35:47,245 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287056435]
[2023-11-29 02:35:47,245 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:35:47,245 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549537820]
[2023-11-29 02:35:47,245 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549537820] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:35:47,246 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:35:47,246 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:35:47,247 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048029865]
[2023-11-29 02:35:47,247 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:35:47,251 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:35:47,251 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:35:47,255 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:35:47,255 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:47,256 INFO  L87              Difference]: Start difference. First operand 5037 states and 8429 transitions. Second operand  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:47,367 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:35:47,367 INFO  L93              Difference]: Finished difference Result 9533 states and 15956 transitions.
[2023-11-29 02:35:47,368 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:35:47,369 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 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 3114
[2023-11-29 02:35:47,370 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:35:47,373 INFO  L225             Difference]: With dead ends: 9533
[2023-11-29 02:35:47,373 INFO  L226             Difference]: Without dead ends: 5046
[2023-11-29 02:35:47,378 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3113 GetRequests, 3111 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:47,379 INFO  L413           NwaCegarLoop]: 7715 mSDtfsCounter, 12 mSDsluCounter, 15420 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23135 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:35:47,379 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23135 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:35:47,387 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5046 states.
[2023-11-29 02:35:47,448 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5046 to 5038.
[2023-11-29 02:35:47,454 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5038 states, 5037 states have (on average 1.6736152471709351) internal successors, (8430), 5037 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:47,462 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5038 states to 5038 states and 8430 transitions.
[2023-11-29 02:35:47,462 INFO  L78                 Accepts]: Start accepts. Automaton has 5038 states and 8430 transitions. Word has length 3114
[2023-11-29 02:35:47,464 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:35:47,464 INFO  L495      AbstractCegarLoop]: Abstraction has 5038 states and 8430 transitions.
[2023-11-29 02:35:47,465 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:47,465 INFO  L276                IsEmpty]: Start isEmpty. Operand 5038 states and 8430 transitions.
[2023-11-29 02:35:47,537 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3115
[2023-11-29 02:35:47,537 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:35:47,540 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:35:47,583 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0
[2023-11-29 02:35:47,752 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13
[2023-11-29 02:35:47,753 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:35:47,753 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:35:47,754 INFO  L85        PathProgramCache]: Analyzing trace with hash -1368786748, now seen corresponding path program 1 times
[2023-11-29 02:35:47,754 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:35:47,754 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670343965]
[2023-11-29 02:35:47,755 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:47,755 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:35:47,955 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:35:47,955 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [822896912]
[2023-11-29 02:35:47,956 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:47,956 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:35:47,956 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:35:47,957 INFO  L229       MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:35:47,958 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2023-11-29 02:35:50,563 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:35:50,634 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12636 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:35:50,665 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:35:50,742 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:35:50,742 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:35:50,742 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:35:50,742 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670343965]
[2023-11-29 02:35:50,742 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:35:50,742 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822896912]
[2023-11-29 02:35:50,742 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [822896912] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:35:50,742 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:35:50,743 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:35:50,744 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161366003]
[2023-11-29 02:35:50,744 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:35:50,747 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:35:50,748 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:35:50,751 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:35:50,751 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:50,752 INFO  L87              Difference]: Start difference. First operand 5038 states and 8430 transitions. Second operand  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:50,854 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:35:50,854 INFO  L93              Difference]: Finished difference Result 9535 states and 15958 transitions.
[2023-11-29 02:35:50,855 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:35:50,856 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 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 3114
[2023-11-29 02:35:50,857 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:35:50,861 INFO  L225             Difference]: With dead ends: 9535
[2023-11-29 02:35:50,861 INFO  L226             Difference]: Without dead ends: 5047
[2023-11-29 02:35:50,863 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3113 GetRequests, 3111 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:50,864 INFO  L413           NwaCegarLoop]: 7715 mSDtfsCounter, 12 mSDsluCounter, 15420 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23135 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:35:50,864 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23135 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:35:50,870 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5047 states.
[2023-11-29 02:35:50,925 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5047 to 5039.
[2023-11-29 02:35:50,930 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5039 states, 5038 states have (on average 1.6734815402937673) internal successors, (8431), 5038 states have internal predecessors, (8431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:50,938 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5039 states to 5039 states and 8431 transitions.
[2023-11-29 02:35:50,939 INFO  L78                 Accepts]: Start accepts. Automaton has 5039 states and 8431 transitions. Word has length 3114
[2023-11-29 02:35:50,940 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:35:50,940 INFO  L495      AbstractCegarLoop]: Abstraction has 5039 states and 8431 transitions.
[2023-11-29 02:35:50,941 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:50,942 INFO  L276                IsEmpty]: Start isEmpty. Operand 5039 states and 8431 transitions.
[2023-11-29 02:35:51,015 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3115
[2023-11-29 02:35:51,015 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:35:51,017 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:35:51,047 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0
[2023-11-29 02:35:51,218 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2023-11-29 02:35:51,218 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:35:51,218 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:35:51,219 INFO  L85        PathProgramCache]: Analyzing trace with hash 918079542, now seen corresponding path program 1 times
[2023-11-29 02:35:51,219 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:35:51,219 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678592637]
[2023-11-29 02:35:51,220 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:51,220 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:35:51,428 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:35:51,428 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [559867448]
[2023-11-29 02:35:51,429 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:51,429 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:35:51,429 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:35:51,430 INFO  L229       MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:35:51,431 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2023-11-29 02:35:54,013 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:35:54,081 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12637 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:35:54,112 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:35:54,169 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:35:54,169 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:35:54,169 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:35:54,169 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678592637]
[2023-11-29 02:35:54,169 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:35:54,169 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559867448]
[2023-11-29 02:35:54,169 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [559867448] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:35:54,169 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:35:54,170 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:35:54,171 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139061890]
[2023-11-29 02:35:54,171 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:35:54,174 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:35:54,174 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:35:54,178 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:35:54,178 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:54,179 INFO  L87              Difference]: Start difference. First operand 5039 states and 8431 transitions. Second operand  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:54,286 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:35:54,286 INFO  L93              Difference]: Finished difference Result 9537 states and 15960 transitions.
[2023-11-29 02:35:54,287 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:35:54,287 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 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 3114
[2023-11-29 02:35:54,290 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:35:54,294 INFO  L225             Difference]: With dead ends: 9537
[2023-11-29 02:35:54,294 INFO  L226             Difference]: Without dead ends: 5048
[2023-11-29 02:35:54,297 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3113 GetRequests, 3111 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:54,297 INFO  L413           NwaCegarLoop]: 7715 mSDtfsCounter, 12 mSDsluCounter, 15420 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23135 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:35:54,297 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23135 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:35:54,302 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5048 states.
[2023-11-29 02:35:54,342 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5048 to 5040.
[2023-11-29 02:35:54,346 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5040 states, 5039 states have (on average 1.6733478864854139) internal successors, (8432), 5039 states have internal predecessors, (8432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:54,352 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5040 states to 5040 states and 8432 transitions.
[2023-11-29 02:35:54,352 INFO  L78                 Accepts]: Start accepts. Automaton has 5040 states and 8432 transitions. Word has length 3114
[2023-11-29 02:35:54,353 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:35:54,353 INFO  L495      AbstractCegarLoop]: Abstraction has 5040 states and 8432 transitions.
[2023-11-29 02:35:54,354 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:54,354 INFO  L276                IsEmpty]: Start isEmpty. Operand 5040 states and 8432 transitions.
[2023-11-29 02:35:54,397 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3115
[2023-11-29 02:35:54,397 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:35:54,399 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:35:54,430 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0
[2023-11-29 02:35:54,599 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2023-11-29 02:35:54,600 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:35:54,600 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:35:54,601 INFO  L85        PathProgramCache]: Analyzing trace with hash 1263967236, now seen corresponding path program 1 times
[2023-11-29 02:35:54,601 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:35:54,601 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761090338]
[2023-11-29 02:35:54,602 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:54,602 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:35:54,802 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:35:54,802 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981637296]
[2023-11-29 02:35:54,802 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:54,803 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:35:54,803 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:35:54,804 INFO  L229       MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:35:54,804 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2023-11-29 02:35:57,479 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:35:57,543 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12638 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:35:57,574 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:35:57,628 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:35:57,629 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:35:57,629 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:35:57,629 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761090338]
[2023-11-29 02:35:57,629 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:35:57,629 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981637296]
[2023-11-29 02:35:57,629 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981637296] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:35:57,629 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:35:57,630 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:35:57,630 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881566982]
[2023-11-29 02:35:57,631 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:35:57,633 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:35:57,634 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:35:57,636 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:35:57,636 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:57,637 INFO  L87              Difference]: Start difference. First operand 5040 states and 8432 transitions. Second operand  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:57,734 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:35:57,735 INFO  L93              Difference]: Finished difference Result 9539 states and 15962 transitions.
[2023-11-29 02:35:57,735 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:35:57,736 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 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 3114
[2023-11-29 02:35:57,737 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:35:57,741 INFO  L225             Difference]: With dead ends: 9539
[2023-11-29 02:35:57,741 INFO  L226             Difference]: Without dead ends: 5049
[2023-11-29 02:35:57,743 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3113 GetRequests, 3111 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:35:57,743 INFO  L413           NwaCegarLoop]: 7715 mSDtfsCounter, 12 mSDsluCounter, 15420 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23135 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:35:57,744 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23135 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:35:57,747 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5049 states.
[2023-11-29 02:35:57,783 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5049 to 5041.
[2023-11-29 02:35:57,787 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5041 states, 5040 states have (on average 1.6732142857142858) internal successors, (8433), 5040 states have internal predecessors, (8433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:57,794 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5041 states to 5041 states and 8433 transitions.
[2023-11-29 02:35:57,794 INFO  L78                 Accepts]: Start accepts. Automaton has 5041 states and 8433 transitions. Word has length 3114
[2023-11-29 02:35:57,795 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:35:57,795 INFO  L495      AbstractCegarLoop]: Abstraction has 5041 states and 8433 transitions.
[2023-11-29 02:35:57,796 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:35:57,796 INFO  L276                IsEmpty]: Start isEmpty. Operand 5041 states and 8433 transitions.
[2023-11-29 02:35:57,842 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3115
[2023-11-29 02:35:57,842 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:35:57,844 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:35:57,876 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0
[2023-11-29 02:35:58,044 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16
[2023-11-29 02:35:58,045 INFO  L420      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:35:58,045 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:35:58,046 INFO  L85        PathProgramCache]: Analyzing trace with hash -1851181870, now seen corresponding path program 1 times
[2023-11-29 02:35:58,046 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:35:58,046 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786319524]
[2023-11-29 02:35:58,047 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:58,047 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:35:58,271 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:35:58,271 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817613296]
[2023-11-29 02:35:58,272 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:35:58,272 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:35:58,272 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:35:58,273 INFO  L229       MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:35:58,274 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2023-11-29 02:36:00,814 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:36:00,881 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12639 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:36:00,916 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:36:00,980 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:36:00,980 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:36:00,980 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:36:00,980 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786319524]
[2023-11-29 02:36:00,980 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:36:00,981 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817613296]
[2023-11-29 02:36:00,981 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [817613296] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:36:00,981 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:36:00,982 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:36:00,982 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128522560]
[2023-11-29 02:36:00,982 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:36:00,984 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:36:00,984 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:36:00,986 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:36:00,986 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:36:00,987 INFO  L87              Difference]: Start difference. First operand 5041 states and 8433 transitions. Second operand  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:01,093 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:36:01,093 INFO  L93              Difference]: Finished difference Result 9541 states and 15964 transitions.
[2023-11-29 02:36:01,094 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:36:01,094 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 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 3114
[2023-11-29 02:36:01,096 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:36:01,099 INFO  L225             Difference]: With dead ends: 9541
[2023-11-29 02:36:01,099 INFO  L226             Difference]: Without dead ends: 5050
[2023-11-29 02:36:01,102 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3113 GetRequests, 3111 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:36:01,102 INFO  L413           NwaCegarLoop]: 7715 mSDtfsCounter, 12 mSDsluCounter, 15420 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23135 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:36:01,102 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23135 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:36:01,106 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5050 states.
[2023-11-29 02:36:01,137 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5050 to 5042.
[2023-11-29 02:36:01,141 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5042 states, 5041 states have (on average 1.6730807379488197) internal successors, (8434), 5041 states have internal predecessors, (8434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:01,147 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5042 states to 5042 states and 8434 transitions.
[2023-11-29 02:36:01,147 INFO  L78                 Accepts]: Start accepts. Automaton has 5042 states and 8434 transitions. Word has length 3114
[2023-11-29 02:36:01,148 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:36:01,148 INFO  L495      AbstractCegarLoop]: Abstraction has 5042 states and 8434 transitions.
[2023-11-29 02:36:01,149 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:01,149 INFO  L276                IsEmpty]: Start isEmpty. Operand 5042 states and 8434 transitions.
[2023-11-29 02:36:01,193 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3115
[2023-11-29 02:36:01,193 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:36:01,195 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:36:01,225 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0
[2023-11-29 02:36:01,396 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17
[2023-11-29 02:36:01,396 INFO  L420      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:36:01,396 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:36:01,397 INFO  L85        PathProgramCache]: Analyzing trace with hash -1385221216, now seen corresponding path program 1 times
[2023-11-29 02:36:01,397 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:36:01,397 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379722026]
[2023-11-29 02:36:01,398 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:01,398 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:36:01,595 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:36:01,596 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2019209652]
[2023-11-29 02:36:01,596 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:01,596 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:36:01,596 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:36:01,597 INFO  L229       MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:36:01,598 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process
[2023-11-29 02:36:04,234 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:36:04,300 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12640 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:36:04,331 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:36:04,399 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:36:04,399 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:36:04,400 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:36:04,400 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379722026]
[2023-11-29 02:36:04,400 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:36:04,400 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019209652]
[2023-11-29 02:36:04,400 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019209652] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:36:04,400 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:36:04,401 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:36:04,401 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740733806]
[2023-11-29 02:36:04,401 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:36:04,403 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:36:04,403 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:36:04,405 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:36:04,405 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:36:04,406 INFO  L87              Difference]: Start difference. First operand 5042 states and 8434 transitions. Second operand  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:04,507 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:36:04,507 INFO  L93              Difference]: Finished difference Result 9543 states and 15966 transitions.
[2023-11-29 02:36:04,508 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:36:04,508 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 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 3114
[2023-11-29 02:36:04,509 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:36:04,513 INFO  L225             Difference]: With dead ends: 9543
[2023-11-29 02:36:04,513 INFO  L226             Difference]: Without dead ends: 5051
[2023-11-29 02:36:04,515 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3113 GetRequests, 3111 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:36:04,516 INFO  L413           NwaCegarLoop]: 7715 mSDtfsCounter, 12 mSDsluCounter, 15420 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23135 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:36:04,516 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23135 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:36:04,520 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5051 states.
[2023-11-29 02:36:04,550 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 5043.
[2023-11-29 02:36:04,554 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5043 states, 5042 states have (on average 1.6729472431574772) internal successors, (8435), 5042 states have internal predecessors, (8435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:04,559 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5043 states to 5043 states and 8435 transitions.
[2023-11-29 02:36:04,559 INFO  L78                 Accepts]: Start accepts. Automaton has 5043 states and 8435 transitions. Word has length 3114
[2023-11-29 02:36:04,560 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:36:04,560 INFO  L495      AbstractCegarLoop]: Abstraction has 5043 states and 8435 transitions.
[2023-11-29 02:36:04,561 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:04,561 INFO  L276                IsEmpty]: Start isEmpty. Operand 5043 states and 8435 transitions.
[2023-11-29 02:36:04,604 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3115
[2023-11-29 02:36:04,604 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:36:04,606 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:36:04,643 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0
[2023-11-29 02:36:04,806 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:36:04,806 INFO  L420      AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:36:04,806 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:36:04,807 INFO  L85        PathProgramCache]: Analyzing trace with hash 2114044562, now seen corresponding path program 1 times
[2023-11-29 02:36:04,808 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:36:04,808 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013521505]
[2023-11-29 02:36:04,808 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:04,808 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:36:05,007 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:36:05,008 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676714415]
[2023-11-29 02:36:05,008 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:05,009 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:36:05,009 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:36:05,009 INFO  L229       MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:36:05,010 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process
[2023-11-29 02:36:07,581 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:36:07,648 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12641 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:36:07,680 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:36:07,742 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:36:07,743 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:36:07,743 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:36:07,743 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013521505]
[2023-11-29 02:36:07,743 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:36:07,743 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676714415]
[2023-11-29 02:36:07,743 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [676714415] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:36:07,743 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:36:07,744 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:36:07,744 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804096143]
[2023-11-29 02:36:07,744 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:36:07,746 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:36:07,746 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:36:07,748 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:36:07,749 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:36:07,749 INFO  L87              Difference]: Start difference. First operand 5043 states and 8435 transitions. Second operand  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:07,850 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:36:07,850 INFO  L93              Difference]: Finished difference Result 9545 states and 15968 transitions.
[2023-11-29 02:36:07,850 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:36:07,851 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 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 3114
[2023-11-29 02:36:07,852 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:36:07,856 INFO  L225             Difference]: With dead ends: 9545
[2023-11-29 02:36:07,856 INFO  L226             Difference]: Without dead ends: 5052
[2023-11-29 02:36:07,858 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3113 GetRequests, 3111 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:36:07,859 INFO  L413           NwaCegarLoop]: 7715 mSDtfsCounter, 12 mSDsluCounter, 15420 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23135 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:36:07,859 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23135 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:36:07,864 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5052 states.
[2023-11-29 02:36:07,893 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5052 to 5044.
[2023-11-29 02:36:07,898 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5044 states, 5043 states have (on average 1.6728138013087448) internal successors, (8436), 5043 states have internal predecessors, (8436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:07,903 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5044 states to 5044 states and 8436 transitions.
[2023-11-29 02:36:07,903 INFO  L78                 Accepts]: Start accepts. Automaton has 5044 states and 8436 transitions. Word has length 3114
[2023-11-29 02:36:07,904 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:36:07,904 INFO  L495      AbstractCegarLoop]: Abstraction has 5044 states and 8436 transitions.
[2023-11-29 02:36:07,905 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:07,905 INFO  L276                IsEmpty]: Start isEmpty. Operand 5044 states and 8436 transitions.
[2023-11-29 02:36:07,947 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3115
[2023-11-29 02:36:07,947 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:36:07,949 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:36:07,978 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0
[2023-11-29 02:36:08,149 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19
[2023-11-29 02:36:08,149 INFO  L420      AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:36:08,150 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:36:08,151 INFO  L85        PathProgramCache]: Analyzing trace with hash -1370641276, now seen corresponding path program 1 times
[2023-11-29 02:36:08,151 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:36:08,151 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395842785]
[2023-11-29 02:36:08,151 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:08,151 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:36:08,353 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:36:08,354 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [778926712]
[2023-11-29 02:36:08,354 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:08,354 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:36:08,354 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:36:08,355 INFO  L229       MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:36:08,358 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process
[2023-11-29 02:36:11,056 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:36:11,118 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12642 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:36:11,148 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:36:11,203 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:36:11,204 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:36:11,204 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:36:11,204 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395842785]
[2023-11-29 02:36:11,204 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:36:11,204 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778926712]
[2023-11-29 02:36:11,204 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [778926712] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:36:11,204 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:36:11,205 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:36:11,205 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663320470]
[2023-11-29 02:36:11,205 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:36:11,207 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:36:11,207 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:36:11,209 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:36:11,209 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:36:11,210 INFO  L87              Difference]: Start difference. First operand 5044 states and 8436 transitions. Second operand  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:11,307 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:36:11,307 INFO  L93              Difference]: Finished difference Result 9547 states and 15970 transitions.
[2023-11-29 02:36:11,307 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:36:11,308 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 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 3114
[2023-11-29 02:36:11,309 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:36:11,313 INFO  L225             Difference]: With dead ends: 9547
[2023-11-29 02:36:11,313 INFO  L226             Difference]: Without dead ends: 5053
[2023-11-29 02:36:11,315 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3113 GetRequests, 3111 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:36:11,315 INFO  L413           NwaCegarLoop]: 7715 mSDtfsCounter, 12 mSDsluCounter, 15420 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23135 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:36:11,316 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23135 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:36:11,319 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5053 states.
[2023-11-29 02:36:11,349 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5053 to 5045.
[2023-11-29 02:36:11,353 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5045 states, 5044 states have (on average 1.672680412371134) internal successors, (8437), 5044 states have internal predecessors, (8437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:11,358 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5045 states to 5045 states and 8437 transitions.
[2023-11-29 02:36:11,358 INFO  L78                 Accepts]: Start accepts. Automaton has 5045 states and 8437 transitions. Word has length 3114
[2023-11-29 02:36:11,359 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:36:11,359 INFO  L495      AbstractCegarLoop]: Abstraction has 5045 states and 8437 transitions.
[2023-11-29 02:36:11,360 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:11,360 INFO  L276                IsEmpty]: Start isEmpty. Operand 5045 states and 8437 transitions.
[2023-11-29 02:36:11,402 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3115
[2023-11-29 02:36:11,402 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:36:11,404 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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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]
[2023-11-29 02:36:11,432 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0
[2023-11-29 02:36:11,604 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20
[2023-11-29 02:36:11,604 INFO  L420      AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:36:11,605 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:36:11,606 INFO  L85        PathProgramCache]: Analyzing trace with hash -1701715758, now seen corresponding path program 1 times
[2023-11-29 02:36:11,606 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:36:11,606 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246768048]
[2023-11-29 02:36:11,606 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:11,606 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:36:11,840 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:36:11,840 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482911063]
[2023-11-29 02:36:11,841 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:11,841 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:36:11,841 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:36:11,842 INFO  L229       MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:36:11,843 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process
[2023-11-29 02:36:14,334 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:36:14,408 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12643 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:36:14,442 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:36:14,503 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:36:14,504 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:36:14,504 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:36:14,504 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246768048]
[2023-11-29 02:36:14,504 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:36:14,504 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482911063]
[2023-11-29 02:36:14,504 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482911063] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:36:14,504 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:36:14,505 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:36:14,505 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703019254]
[2023-11-29 02:36:14,505 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:36:14,509 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:36:14,509 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:36:14,511 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:36:14,511 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:36:14,512 INFO  L87              Difference]: Start difference. First operand 5045 states and 8437 transitions. Second operand  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:14,618 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:36:14,618 INFO  L93              Difference]: Finished difference Result 9549 states and 15972 transitions.
[2023-11-29 02:36:14,618 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:36:14,619 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 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 3114
[2023-11-29 02:36:14,621 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:36:14,624 INFO  L225             Difference]: With dead ends: 9549
[2023-11-29 02:36:14,624 INFO  L226             Difference]: Without dead ends: 5054
[2023-11-29 02:36:14,627 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3113 GetRequests, 3111 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:36:14,628 INFO  L413           NwaCegarLoop]: 7715 mSDtfsCounter, 12 mSDsluCounter, 15420 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23135 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:36:14,628 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23135 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:36:14,632 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5054 states.
[2023-11-29 02:36:14,663 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5054 to 5046.
[2023-11-29 02:36:14,667 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5046 states, 5045 states have (on average 1.6725470763131813) internal successors, (8438), 5045 states have internal predecessors, (8438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:14,672 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5046 states to 5046 states and 8438 transitions.
[2023-11-29 02:36:14,673 INFO  L78                 Accepts]: Start accepts. Automaton has 5046 states and 8438 transitions. Word has length 3114
[2023-11-29 02:36:14,673 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:36:14,674 INFO  L495      AbstractCegarLoop]: Abstraction has 5046 states and 8438 transitions.
[2023-11-29 02:36:14,674 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:14,674 INFO  L276                IsEmpty]: Start isEmpty. Operand 5046 states and 8438 transitions.
[2023-11-29 02:36:14,718 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3115
[2023-11-29 02:36:14,718 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:36:14,719 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:36:14,749 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0
[2023-11-29 02:36:14,919 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:36:14,920 INFO  L420      AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:36:14,920 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:36:14,921 INFO  L85        PathProgramCache]: Analyzing trace with hash 362775840, now seen corresponding path program 1 times
[2023-11-29 02:36:14,921 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:36:14,921 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536923587]
[2023-11-29 02:36:14,922 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:14,922 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:36:15,121 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:36:15,121 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752775557]
[2023-11-29 02:36:15,122 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:15,122 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:36:15,122 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:36:15,122 INFO  L229       MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:36:15,124 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process
[2023-11-29 02:36:17,763 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:36:17,839 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12644 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 02:36:17,874 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:36:17,940 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:36:17,940 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:36:17,940 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:36:17,940 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536923587]
[2023-11-29 02:36:17,940 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:36:17,940 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752775557]
[2023-11-29 02:36:17,940 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752775557] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:36:17,940 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:36:17,941 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:36:17,941 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067027820]
[2023-11-29 02:36:17,941 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:36:17,944 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:36:17,944 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:36:17,946 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:36:17,946 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:36:17,947 INFO  L87              Difference]: Start difference. First operand 5046 states and 8438 transitions. Second operand  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:18,053 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:36:18,053 INFO  L93              Difference]: Finished difference Result 9551 states and 15974 transitions.
[2023-11-29 02:36:18,054 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:36:18,054 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 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 3114
[2023-11-29 02:36:18,056 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:36:18,061 INFO  L225             Difference]: With dead ends: 9551
[2023-11-29 02:36:18,061 INFO  L226             Difference]: Without dead ends: 5055
[2023-11-29 02:36:18,064 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3113 GetRequests, 3111 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:36:18,064 INFO  L413           NwaCegarLoop]: 7715 mSDtfsCounter, 12 mSDsluCounter, 15420 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23135 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:36:18,064 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23135 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:36:18,070 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5055 states.
[2023-11-29 02:36:18,103 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5055 to 5047.
[2023-11-29 02:36:18,107 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5047 states, 5046 states have (on average 1.6724137931034482) internal successors, (8439), 5046 states have internal predecessors, (8439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:18,112 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5047 states to 5047 states and 8439 transitions.
[2023-11-29 02:36:18,113 INFO  L78                 Accepts]: Start accepts. Automaton has 5047 states and 8439 transitions. Word has length 3114
[2023-11-29 02:36:18,114 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:36:18,114 INFO  L495      AbstractCegarLoop]: Abstraction has 5047 states and 8439 transitions.
[2023-11-29 02:36:18,114 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 778.5) internal successors, (3114), 4 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:18,115 INFO  L276                IsEmpty]: Start isEmpty. Operand 5047 states and 8439 transitions.
[2023-11-29 02:36:18,157 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3115
[2023-11-29 02:36:18,157 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:36:18,158 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:36:18,190 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0
[2023-11-29 02:36:18,358 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:36:18,359 INFO  L420      AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:36:18,359 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:36:18,360 INFO  L85        PathProgramCache]: Analyzing trace with hash 259210990, now seen corresponding path program 1 times
[2023-11-29 02:36:18,360 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:36:18,360 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295740235]
[2023-11-29 02:36:18,361 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:18,361 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:36:18,564 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:36:18,564 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [172773590]
[2023-11-29 02:36:18,565 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:18,565 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:36:18,565 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:36:18,566 INFO  L229       MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:36:18,567 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process
[2023-11-29 02:36:21,213 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:36:21,280 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12645 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:36:21,333 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:36:21,513 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked.
[2023-11-29 02:36:21,513 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:36:21,513 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:36:21,513 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295740235]
[2023-11-29 02:36:21,514 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:36:21,514 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172773590]
[2023-11-29 02:36:21,514 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [172773590] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:36:21,514 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:36:21,515 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:36:21,515 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730651547]
[2023-11-29 02:36:21,515 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:36:21,518 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:36:21,519 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:36:21,521 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:36:21,522 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:36:21,523 INFO  L87              Difference]: Start difference. First operand 5047 states and 8439 transitions. Second operand  has 7 states, 7 states have (on average 405.57142857142856) internal successors, (2839), 7 states have internal predecessors, (2839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:21,878 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:36:21,878 INFO  L93              Difference]: Finished difference Result 14036 states and 23477 transitions.
[2023-11-29 02:36:21,879 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:36:21,880 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 405.57142857142856) internal successors, (2839), 7 states have internal predecessors, (2839), 0 states have call successors, (0), 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 3114
[2023-11-29 02:36:21,882 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:36:21,889 INFO  L225             Difference]: With dead ends: 14036
[2023-11-29 02:36:21,889 INFO  L226             Difference]: Without dead ends: 9538
[2023-11-29 02:36:21,893 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3123 GetRequests, 3111 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:36:21,894 INFO  L413           NwaCegarLoop]: 8402 mSDtfsCounter, 21916 mSDsluCounter, 32902 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21916 SdHoareTripleChecker+Valid, 41304 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:36:21,894 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21916 Valid, 41304 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:36:21,902 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9538 states.
[2023-11-29 02:36:21,947 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9538 to 5049.
[2023-11-29 02:36:21,951 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5049 states, 5048 states have (on average 1.672147385103011) internal successors, (8441), 5048 states have internal predecessors, (8441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:21,957 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5049 states to 5049 states and 8441 transitions.
[2023-11-29 02:36:21,957 INFO  L78                 Accepts]: Start accepts. Automaton has 5049 states and 8441 transitions. Word has length 3114
[2023-11-29 02:36:21,958 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:36:21,958 INFO  L495      AbstractCegarLoop]: Abstraction has 5049 states and 8441 transitions.
[2023-11-29 02:36:21,959 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 405.57142857142856) internal successors, (2839), 7 states have internal predecessors, (2839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:21,959 INFO  L276                IsEmpty]: Start isEmpty. Operand 5049 states and 8441 transitions.
[2023-11-29 02:36:22,001 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3116
[2023-11-29 02:36:22,002 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:36:22,002 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:36:22,041 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0
[2023-11-29 02:36:22,203 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23
[2023-11-29 02:36:22,203 INFO  L420      AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:36:22,204 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:36:22,204 INFO  L85        PathProgramCache]: Analyzing trace with hash 370612462, now seen corresponding path program 1 times
[2023-11-29 02:36:22,205 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:36:22,205 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884336840]
[2023-11-29 02:36:22,205 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:22,205 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:36:22,447 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:36:22,447 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [641315605]
[2023-11-29 02:36:22,447 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:22,447 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:36:22,448 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:36:22,448 INFO  L229       MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:36:22,449 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process
[2023-11-29 02:36:24,958 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:36:25,024 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12649 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:36:25,065 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:36:25,271 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked.
[2023-11-29 02:36:25,271 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:36:25,271 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:36:25,271 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884336840]
[2023-11-29 02:36:25,271 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:36:25,271 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641315605]
[2023-11-29 02:36:25,272 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [641315605] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:36:25,272 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:36:25,273 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:36:25,273 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157936506]
[2023-11-29 02:36:25,273 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:36:25,275 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:36:25,276 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:36:25,278 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:36:25,278 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:36:25,279 INFO  L87              Difference]: Start difference. First operand 5049 states and 8441 transitions. Second operand  has 7 states, 7 states have (on average 406.0) internal successors, (2842), 7 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:25,643 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:36:25,644 INFO  L93              Difference]: Finished difference Result 14042 states and 23483 transitions.
[2023-11-29 02:36:25,644 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:36:25,645 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 406.0) internal successors, (2842), 7 states have internal predecessors, (2842), 0 states have call successors, (0), 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 3115
[2023-11-29 02:36:25,647 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:36:25,654 INFO  L225             Difference]: With dead ends: 14042
[2023-11-29 02:36:25,654 INFO  L226             Difference]: Without dead ends: 9539
[2023-11-29 02:36:25,658 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3124 GetRequests, 3112 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:36:25,658 INFO  L413           NwaCegarLoop]: 8397 mSDtfsCounter, 21915 mSDsluCounter, 32887 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21915 SdHoareTripleChecker+Valid, 41284 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:36:25,659 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21915 Valid, 41284 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:36:25,667 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9539 states.
[2023-11-29 02:36:25,708 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9539 to 5051.
[2023-11-29 02:36:25,712 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5051 states, 5050 states have (on average 1.6718811881188118) internal successors, (8443), 5050 states have internal predecessors, (8443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:25,717 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5051 states to 5051 states and 8443 transitions.
[2023-11-29 02:36:25,717 INFO  L78                 Accepts]: Start accepts. Automaton has 5051 states and 8443 transitions. Word has length 3115
[2023-11-29 02:36:25,719 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:36:25,719 INFO  L495      AbstractCegarLoop]: Abstraction has 5051 states and 8443 transitions.
[2023-11-29 02:36:25,720 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 406.0) internal successors, (2842), 7 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:25,720 INFO  L276                IsEmpty]: Start isEmpty. Operand 5051 states and 8443 transitions.
[2023-11-29 02:36:25,761 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3117
[2023-11-29 02:36:25,762 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:36:25,762 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:36:25,794 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0
[2023-11-29 02:36:25,963 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:36:25,963 INFO  L420      AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:36:25,963 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:36:25,964 INFO  L85        PathProgramCache]: Analyzing trace with hash 278998230, now seen corresponding path program 1 times
[2023-11-29 02:36:25,964 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:36:25,964 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937381136]
[2023-11-29 02:36:25,964 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:25,964 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:36:26,188 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:36:26,188 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1260979074]
[2023-11-29 02:36:26,189 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:26,189 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:36:26,189 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:36:26,190 INFO  L229       MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:36:26,190 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process
[2023-11-29 02:36:28,894 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:36:28,974 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12652 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:36:29,013 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:36:29,159 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked.
[2023-11-29 02:36:29,159 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:36:29,159 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:36:29,159 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937381136]
[2023-11-29 02:36:29,159 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:36:29,159 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260979074]
[2023-11-29 02:36:29,159 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260979074] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:36:29,159 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:36:29,160 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:36:29,160 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744119411]
[2023-11-29 02:36:29,161 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:36:29,162 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:36:29,162 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:36:29,164 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:36:29,164 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:36:29,165 INFO  L87              Difference]: Start difference. First operand 5051 states and 8443 transitions. Second operand  has 7 states, 7 states have (on average 406.42857142857144) internal successors, (2845), 7 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:29,471 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:36:29,471 INFO  L93              Difference]: Finished difference Result 14048 states and 23489 transitions.
[2023-11-29 02:36:29,472 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:36:29,472 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 406.42857142857144) internal successors, (2845), 7 states have internal predecessors, (2845), 0 states have call successors, (0), 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 3116
[2023-11-29 02:36:29,474 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:36:29,481 INFO  L225             Difference]: With dead ends: 14048
[2023-11-29 02:36:29,482 INFO  L226             Difference]: Without dead ends: 9540
[2023-11-29 02:36:29,485 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3125 GetRequests, 3113 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:36:29,486 INFO  L413           NwaCegarLoop]: 8392 mSDtfsCounter, 21914 mSDsluCounter, 32872 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21914 SdHoareTripleChecker+Valid, 41264 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:36:29,486 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21914 Valid, 41264 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:36:29,494 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9540 states.
[2023-11-29 02:36:29,541 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9540 to 5053.
[2023-11-29 02:36:29,546 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5053 states, 5052 states have (on average 1.6716152019002375) internal successors, (8445), 5052 states have internal predecessors, (8445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:29,552 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5053 states to 5053 states and 8445 transitions.
[2023-11-29 02:36:29,552 INFO  L78                 Accepts]: Start accepts. Automaton has 5053 states and 8445 transitions. Word has length 3116
[2023-11-29 02:36:29,554 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:36:29,554 INFO  L495      AbstractCegarLoop]: Abstraction has 5053 states and 8445 transitions.
[2023-11-29 02:36:29,554 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 406.42857142857144) internal successors, (2845), 7 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:29,555 INFO  L276                IsEmpty]: Start isEmpty. Operand 5053 states and 8445 transitions.
[2023-11-29 02:36:29,659 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3118
[2023-11-29 02:36:29,660 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:36:29,661 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:36:29,695 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0
[2023-11-29 02:36:29,861 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:36:29,862 INFO  L420      AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:36:29,862 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:36:29,863 INFO  L85        PathProgramCache]: Analyzing trace with hash -1781990648, now seen corresponding path program 1 times
[2023-11-29 02:36:29,863 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:36:29,863 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522710245]
[2023-11-29 02:36:29,863 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:29,863 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:36:30,081 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:36:30,081 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [499053255]
[2023-11-29 02:36:30,082 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:30,082 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:36:30,083 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:36:30,083 INFO  L229       MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:36:30,084 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process
[2023-11-29 02:36:32,751 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:36:32,817 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12655 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:36:32,849 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:36:32,991 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked.
[2023-11-29 02:36:32,992 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:36:32,992 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:36:32,992 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522710245]
[2023-11-29 02:36:32,992 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:36:32,992 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499053255]
[2023-11-29 02:36:32,992 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [499053255] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:36:32,992 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:36:32,993 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:36:32,993 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659604513]
[2023-11-29 02:36:32,993 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:36:32,996 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:36:32,996 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:36:32,998 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:36:32,998 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:36:32,999 INFO  L87              Difference]: Start difference. First operand 5053 states and 8445 transitions. Second operand  has 7 states, 7 states have (on average 406.85714285714283) internal successors, (2848), 7 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:33,312 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:36:33,313 INFO  L93              Difference]: Finished difference Result 14054 states and 23495 transitions.
[2023-11-29 02:36:33,313 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:36:33,314 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 406.85714285714283) internal successors, (2848), 7 states have internal predecessors, (2848), 0 states have call successors, (0), 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 3117
[2023-11-29 02:36:33,317 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:36:33,325 INFO  L225             Difference]: With dead ends: 14054
[2023-11-29 02:36:33,326 INFO  L226             Difference]: Without dead ends: 9541
[2023-11-29 02:36:33,329 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3126 GetRequests, 3114 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:36:33,330 INFO  L413           NwaCegarLoop]: 8387 mSDtfsCounter, 21913 mSDsluCounter, 32857 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21913 SdHoareTripleChecker+Valid, 41244 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:36:33,330 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21913 Valid, 41244 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:36:33,337 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9541 states.
[2023-11-29 02:36:33,378 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9541 to 5055.
[2023-11-29 02:36:33,382 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5055 states, 5054 states have (on average 1.6713494261970716) internal successors, (8447), 5054 states have internal predecessors, (8447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:33,387 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5055 states to 5055 states and 8447 transitions.
[2023-11-29 02:36:33,387 INFO  L78                 Accepts]: Start accepts. Automaton has 5055 states and 8447 transitions. Word has length 3117
[2023-11-29 02:36:33,389 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:36:33,389 INFO  L495      AbstractCegarLoop]: Abstraction has 5055 states and 8447 transitions.
[2023-11-29 02:36:33,390 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 406.85714285714283) internal successors, (2848), 7 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:33,390 INFO  L276                IsEmpty]: Start isEmpty. Operand 5055 states and 8447 transitions.
[2023-11-29 02:36:33,434 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3119
[2023-11-29 02:36:33,434 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:36:33,435 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:36:33,475 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0
[2023-11-29 02:36:33,636 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26
[2023-11-29 02:36:33,636 INFO  L420      AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:36:33,636 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:36:33,637 INFO  L85        PathProgramCache]: Analyzing trace with hash 1791049660, now seen corresponding path program 1 times
[2023-11-29 02:36:33,637 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:36:33,637 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888639876]
[2023-11-29 02:36:33,637 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:33,637 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:36:33,836 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:36:33,836 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [457950241]
[2023-11-29 02:36:33,837 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:33,837 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:36:33,837 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:36:33,838 INFO  L229       MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:36:33,839 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process
[2023-11-29 02:36:36,449 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:36:36,516 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12658 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:36:36,547 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:36:36,690 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked.
[2023-11-29 02:36:36,690 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:36:36,690 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:36:36,690 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888639876]
[2023-11-29 02:36:36,691 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:36:36,691 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457950241]
[2023-11-29 02:36:36,691 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [457950241] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:36:36,691 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:36:36,692 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:36:36,692 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832307598]
[2023-11-29 02:36:36,692 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:36:36,694 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:36:36,694 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:36:36,695 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:36:36,695 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:36:36,696 INFO  L87              Difference]: Start difference. First operand 5055 states and 8447 transitions. Second operand  has 7 states, 7 states have (on average 407.2857142857143) internal successors, (2851), 7 states have internal predecessors, (2851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:37,038 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:36:37,038 INFO  L93              Difference]: Finished difference Result 14060 states and 23501 transitions.
[2023-11-29 02:36:37,038 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:36:37,039 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 407.2857142857143) internal successors, (2851), 7 states have internal predecessors, (2851), 0 states have call successors, (0), 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 3118
[2023-11-29 02:36:37,041 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:36:37,048 INFO  L225             Difference]: With dead ends: 14060
[2023-11-29 02:36:37,048 INFO  L226             Difference]: Without dead ends: 9542
[2023-11-29 02:36:37,051 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3127 GetRequests, 3115 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:36:37,051 INFO  L413           NwaCegarLoop]: 8382 mSDtfsCounter, 21912 mSDsluCounter, 32842 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21912 SdHoareTripleChecker+Valid, 41224 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:36:37,052 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21912 Valid, 41224 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:36:37,059 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9542 states.
[2023-11-29 02:36:37,099 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9542 to 5057.
[2023-11-29 02:36:37,103 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5057 states, 5056 states have (on average 1.6710838607594938) internal successors, (8449), 5056 states have internal predecessors, (8449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:37,108 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5057 states to 5057 states and 8449 transitions.
[2023-11-29 02:36:37,109 INFO  L78                 Accepts]: Start accepts. Automaton has 5057 states and 8449 transitions. Word has length 3118
[2023-11-29 02:36:37,110 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:36:37,110 INFO  L495      AbstractCegarLoop]: Abstraction has 5057 states and 8449 transitions.
[2023-11-29 02:36:37,111 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 407.2857142857143) internal successors, (2851), 7 states have internal predecessors, (2851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:37,111 INFO  L276                IsEmpty]: Start isEmpty. Operand 5057 states and 8449 transitions.
[2023-11-29 02:36:37,153 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3120
[2023-11-29 02:36:37,153 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:36:37,154 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:36:37,186 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0
[2023-11-29 02:36:37,354 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27
[2023-11-29 02:36:37,355 INFO  L420      AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:36:37,355 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:36:37,355 INFO  L85        PathProgramCache]: Analyzing trace with hash -786180828, now seen corresponding path program 1 times
[2023-11-29 02:36:37,356 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:36:37,356 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567085467]
[2023-11-29 02:36:37,356 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:37,356 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:36:37,551 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:36:37,551 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740779077]
[2023-11-29 02:36:37,552 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:37,552 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:36:37,552 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:36:37,553 INFO  L229       MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:36:37,553 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process
[2023-11-29 02:36:40,131 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:36:40,198 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12662 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:36:40,229 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:36:40,373 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked.
[2023-11-29 02:36:40,373 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:36:40,373 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:36:40,374 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567085467]
[2023-11-29 02:36:40,374 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:36:40,374 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740779077]
[2023-11-29 02:36:40,374 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [740779077] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:36:40,374 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:36:40,375 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:36:40,375 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7061129]
[2023-11-29 02:36:40,375 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:36:40,377 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:36:40,377 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:36:40,378 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:36:40,379 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:36:40,379 INFO  L87              Difference]: Start difference. First operand 5057 states and 8449 transitions. Second operand  has 7 states, 7 states have (on average 407.7142857142857) internal successors, (2854), 7 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:40,678 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:36:40,678 INFO  L93              Difference]: Finished difference Result 14066 states and 23507 transitions.
[2023-11-29 02:36:40,678 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:36:40,679 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 407.7142857142857) internal successors, (2854), 7 states have internal predecessors, (2854), 0 states have call successors, (0), 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 3119
[2023-11-29 02:36:40,681 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:36:40,689 INFO  L225             Difference]: With dead ends: 14066
[2023-11-29 02:36:40,689 INFO  L226             Difference]: Without dead ends: 9543
[2023-11-29 02:36:40,692 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3128 GetRequests, 3116 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:36:40,693 INFO  L413           NwaCegarLoop]: 8377 mSDtfsCounter, 21911 mSDsluCounter, 32827 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21911 SdHoareTripleChecker+Valid, 41204 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:36:40,693 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21911 Valid, 41204 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:36:40,700 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9543 states.
[2023-11-29 02:36:40,740 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9543 to 5059.
[2023-11-29 02:36:40,744 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5059 states, 5058 states have (on average 1.6708185053380782) internal successors, (8451), 5058 states have internal predecessors, (8451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:40,749 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5059 states to 5059 states and 8451 transitions.
[2023-11-29 02:36:40,749 INFO  L78                 Accepts]: Start accepts. Automaton has 5059 states and 8451 transitions. Word has length 3119
[2023-11-29 02:36:40,750 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:36:40,751 INFO  L495      AbstractCegarLoop]: Abstraction has 5059 states and 8451 transitions.
[2023-11-29 02:36:40,751 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 407.7142857142857) internal successors, (2854), 7 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:40,751 INFO  L276                IsEmpty]: Start isEmpty. Operand 5059 states and 8451 transitions.
[2023-11-29 02:36:40,793 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3121
[2023-11-29 02:36:40,793 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:36:40,794 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:36:40,826 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0
[2023-11-29 02:36:40,994 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28
[2023-11-29 02:36:40,994 INFO  L420      AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:36:40,995 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:36:40,995 INFO  L85        PathProgramCache]: Analyzing trace with hash -1696006492, now seen corresponding path program 1 times
[2023-11-29 02:36:40,995 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:36:40,995 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406434254]
[2023-11-29 02:36:40,996 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:40,996 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:36:41,196 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:36:41,196 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [819064204]
[2023-11-29 02:36:41,197 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:41,197 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:36:41,197 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:36:41,198 INFO  L229       MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:36:41,198 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process
[2023-11-29 02:36:43,898 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:36:43,961 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12665 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-29 02:36:43,991 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:36:44,140 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked.
[2023-11-29 02:36:44,140 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:36:44,140 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:36:44,141 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406434254]
[2023-11-29 02:36:44,141 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:36:44,141 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819064204]
[2023-11-29 02:36:44,141 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [819064204] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:36:44,141 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:36:44,142 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:36:44,142 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058625137]
[2023-11-29 02:36:44,142 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:36:44,144 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:36:44,144 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:36:44,145 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:36:44,146 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:36:44,146 INFO  L87              Difference]: Start difference. First operand 5059 states and 8451 transitions. Second operand  has 8 states, 8 states have (on average 357.125) internal successors, (2857), 8 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:44,502 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:36:44,502 INFO  L93              Difference]: Finished difference Result 14072 states and 23513 transitions.
[2023-11-29 02:36:44,502 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:36:44,503 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 357.125) internal successors, (2857), 8 states have internal predecessors, (2857), 0 states have call successors, (0), 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 3120
[2023-11-29 02:36:44,506 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:36:44,513 INFO  L225             Difference]: With dead ends: 14072
[2023-11-29 02:36:44,513 INFO  L226             Difference]: Without dead ends: 9544
[2023-11-29 02:36:44,516 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3129 GetRequests, 3116 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210
[2023-11-29 02:36:44,517 INFO  L413           NwaCegarLoop]: 8372 mSDtfsCounter, 21910 mSDsluCounter, 41181 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21910 SdHoareTripleChecker+Valid, 49553 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:36:44,517 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21910 Valid, 49553 Invalid, 59 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:36:44,524 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9544 states.
[2023-11-29 02:36:44,563 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9544 to 5061.
[2023-11-29 02:36:44,567 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5061 states, 5060 states have (on average 1.6705533596837945) internal successors, (8453), 5060 states have internal predecessors, (8453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:44,572 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5061 states to 5061 states and 8453 transitions.
[2023-11-29 02:36:44,573 INFO  L78                 Accepts]: Start accepts. Automaton has 5061 states and 8453 transitions. Word has length 3120
[2023-11-29 02:36:44,574 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:36:44,574 INFO  L495      AbstractCegarLoop]: Abstraction has 5061 states and 8453 transitions.
[2023-11-29 02:36:44,575 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 357.125) internal successors, (2857), 8 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:44,575 INFO  L276                IsEmpty]: Start isEmpty. Operand 5061 states and 8453 transitions.
[2023-11-29 02:36:44,625 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3122
[2023-11-29 02:36:44,625 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:36:44,625 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:36:44,657 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0
[2023-11-29 02:36:44,826 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:36:44,826 INFO  L420      AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:36:44,826 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:36:44,827 INFO  L85        PathProgramCache]: Analyzing trace with hash -191392962, now seen corresponding path program 1 times
[2023-11-29 02:36:44,827 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:36:44,827 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634082574]
[2023-11-29 02:36:44,827 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:44,827 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:36:45,040 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:36:45,040 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [859154264]
[2023-11-29 02:36:45,041 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:45,041 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:36:45,041 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:36:45,042 INFO  L229       MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:36:45,043 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process
[2023-11-29 02:36:47,604 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:36:47,673 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12668 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:36:47,704 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:36:47,838 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked.
[2023-11-29 02:36:47,838 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:36:47,838 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:36:47,838 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634082574]
[2023-11-29 02:36:47,838 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:36:47,838 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859154264]
[2023-11-29 02:36:47,838 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [859154264] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:36:47,839 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:36:47,840 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:36:47,840 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103464283]
[2023-11-29 02:36:47,840 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:36:47,841 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:36:47,841 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:36:47,843 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:36:47,843 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:36:47,843 INFO  L87              Difference]: Start difference. First operand 5061 states and 8453 transitions. Second operand  has 7 states, 7 states have (on average 408.57142857142856) internal successors, (2860), 7 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:48,139 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:36:48,140 INFO  L93              Difference]: Finished difference Result 14078 states and 23519 transitions.
[2023-11-29 02:36:48,140 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:36:48,141 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 408.57142857142856) internal successors, (2860), 7 states have internal predecessors, (2860), 0 states have call successors, (0), 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 3121
[2023-11-29 02:36:48,143 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:36:48,150 INFO  L225             Difference]: With dead ends: 14078
[2023-11-29 02:36:48,150 INFO  L226             Difference]: Without dead ends: 9545
[2023-11-29 02:36:48,154 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3130 GetRequests, 3118 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:36:48,154 INFO  L413           NwaCegarLoop]: 8367 mSDtfsCounter, 21909 mSDsluCounter, 32797 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21909 SdHoareTripleChecker+Valid, 41164 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:36:48,154 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21909 Valid, 41164 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:36:48,162 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9545 states.
[2023-11-29 02:36:48,203 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9545 to 5063.
[2023-11-29 02:36:48,207 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5063 states, 5062 states have (on average 1.6702884235480047) internal successors, (8455), 5062 states have internal predecessors, (8455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:48,212 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5063 states to 5063 states and 8455 transitions.
[2023-11-29 02:36:48,212 INFO  L78                 Accepts]: Start accepts. Automaton has 5063 states and 8455 transitions. Word has length 3121
[2023-11-29 02:36:48,213 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:36:48,213 INFO  L495      AbstractCegarLoop]: Abstraction has 5063 states and 8455 transitions.
[2023-11-29 02:36:48,214 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 408.57142857142856) internal successors, (2860), 7 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:48,214 INFO  L276                IsEmpty]: Start isEmpty. Operand 5063 states and 8455 transitions.
[2023-11-29 02:36:48,255 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3123
[2023-11-29 02:36:48,255 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:36:48,256 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:36:48,287 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0
[2023-11-29 02:36:48,456 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:36:48,457 INFO  L420      AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:36:48,457 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:36:48,458 INFO  L85        PathProgramCache]: Analyzing trace with hash -1949952630, now seen corresponding path program 1 times
[2023-11-29 02:36:48,458 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:36:48,458 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070491546]
[2023-11-29 02:36:48,458 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:48,459 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:36:48,696 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:36:48,696 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [37956534]
[2023-11-29 02:36:48,697 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:48,697 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:36:48,697 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:36:48,697 INFO  L229       MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:36:48,699 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process
[2023-11-29 02:36:51,351 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:36:51,419 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12671 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:36:51,452 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:36:51,589 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked.
[2023-11-29 02:36:51,590 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:36:51,590 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:36:51,590 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070491546]
[2023-11-29 02:36:51,590 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:36:51,590 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37956534]
[2023-11-29 02:36:51,590 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [37956534] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:36:51,590 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:36:51,591 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:36:51,591 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774268665]
[2023-11-29 02:36:51,591 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:36:51,593 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:36:51,593 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:36:51,595 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:36:51,595 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:36:51,595 INFO  L87              Difference]: Start difference. First operand 5063 states and 8455 transitions. Second operand  has 7 states, 7 states have (on average 409.0) internal successors, (2863), 7 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:51,891 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:36:51,891 INFO  L93              Difference]: Finished difference Result 14084 states and 23525 transitions.
[2023-11-29 02:36:51,891 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:36:51,892 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 409.0) internal successors, (2863), 7 states have internal predecessors, (2863), 0 states have call successors, (0), 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 3122
[2023-11-29 02:36:51,894 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:36:51,901 INFO  L225             Difference]: With dead ends: 14084
[2023-11-29 02:36:51,901 INFO  L226             Difference]: Without dead ends: 9546
[2023-11-29 02:36:51,904 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3131 GetRequests, 3119 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:36:51,904 INFO  L413           NwaCegarLoop]: 8362 mSDtfsCounter, 21908 mSDsluCounter, 32782 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21908 SdHoareTripleChecker+Valid, 41144 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:36:51,905 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21908 Valid, 41144 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:36:51,912 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9546 states.
[2023-11-29 02:36:51,952 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9546 to 5065.
[2023-11-29 02:36:51,956 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5065 states, 5064 states have (on average 1.6700236966824644) internal successors, (8457), 5064 states have internal predecessors, (8457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:51,961 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5065 states to 5065 states and 8457 transitions.
[2023-11-29 02:36:51,961 INFO  L78                 Accepts]: Start accepts. Automaton has 5065 states and 8457 transitions. Word has length 3122
[2023-11-29 02:36:51,962 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:36:51,962 INFO  L495      AbstractCegarLoop]: Abstraction has 5065 states and 8457 transitions.
[2023-11-29 02:36:51,963 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 409.0) internal successors, (2863), 7 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:51,963 INFO  L276                IsEmpty]: Start isEmpty. Operand 5065 states and 8457 transitions.
[2023-11-29 02:36:52,004 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3124
[2023-11-29 02:36:52,004 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:36:52,005 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:36:52,037 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0
[2023-11-29 02:36:52,206 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:36:52,206 INFO  L420      AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:36:52,206 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:36:52,207 INFO  L85        PathProgramCache]: Analyzing trace with hash 776312410, now seen corresponding path program 1 times
[2023-11-29 02:36:52,207 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:36:52,207 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102105095]
[2023-11-29 02:36:52,207 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:52,207 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:36:52,402 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:36:52,403 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254963783]
[2023-11-29 02:36:52,403 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:52,403 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:36:52,404 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:36:52,404 INFO  L229       MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:36:52,405 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process
[2023-11-29 02:36:54,968 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:36:55,041 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12675 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:36:55,073 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:36:55,216 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked.
[2023-11-29 02:36:55,216 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:36:55,216 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:36:55,216 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102105095]
[2023-11-29 02:36:55,216 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:36:55,216 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254963783]
[2023-11-29 02:36:55,216 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254963783] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:36:55,216 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:36:55,217 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:36:55,217 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125482436]
[2023-11-29 02:36:55,217 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:36:55,218 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:36:55,219 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:36:55,220 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:36:55,220 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:36:55,221 INFO  L87              Difference]: Start difference. First operand 5065 states and 8457 transitions. Second operand  has 7 states, 7 states have (on average 409.42857142857144) internal successors, (2866), 7 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:55,510 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:36:55,510 INFO  L93              Difference]: Finished difference Result 14090 states and 23531 transitions.
[2023-11-29 02:36:55,510 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:36:55,511 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 409.42857142857144) internal successors, (2866), 7 states have internal predecessors, (2866), 0 states have call successors, (0), 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 3123
[2023-11-29 02:36:55,513 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:36:55,520 INFO  L225             Difference]: With dead ends: 14090
[2023-11-29 02:36:55,520 INFO  L226             Difference]: Without dead ends: 9547
[2023-11-29 02:36:55,523 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3132 GetRequests, 3120 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:36:55,523 INFO  L413           NwaCegarLoop]: 8357 mSDtfsCounter, 21907 mSDsluCounter, 32767 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21907 SdHoareTripleChecker+Valid, 41124 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:36:55,524 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21907 Valid, 41124 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:36:55,531 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9547 states.
[2023-11-29 02:36:55,571 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9547 to 5067.
[2023-11-29 02:36:55,575 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5067 states, 5066 states have (on average 1.669759178839321) internal successors, (8459), 5066 states have internal predecessors, (8459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:55,579 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5067 states to 5067 states and 8459 transitions.
[2023-11-29 02:36:55,580 INFO  L78                 Accepts]: Start accepts. Automaton has 5067 states and 8459 transitions. Word has length 3123
[2023-11-29 02:36:55,581 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:36:55,581 INFO  L495      AbstractCegarLoop]: Abstraction has 5067 states and 8459 transitions.
[2023-11-29 02:36:55,582 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 409.42857142857144) internal successors, (2866), 7 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:55,582 INFO  L276                IsEmpty]: Start isEmpty. Operand 5067 states and 8459 transitions.
[2023-11-29 02:36:55,649 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3125
[2023-11-29 02:36:55,649 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:36:55,650 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:36:55,684 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0
[2023-11-29 02:36:55,850 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32
[2023-11-29 02:36:55,851 INFO  L420      AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:36:55,852 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:36:55,852 INFO  L85        PathProgramCache]: Analyzing trace with hash 37201266, now seen corresponding path program 1 times
[2023-11-29 02:36:55,852 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:36:55,853 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903140146]
[2023-11-29 02:36:55,853 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:55,853 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:36:56,048 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:36:56,049 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1775731996]
[2023-11-29 02:36:56,049 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:56,049 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:36:56,049 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:36:56,050 INFO  L229       MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:36:56,051 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process
[2023-11-29 02:36:58,753 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:36:58,821 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12678 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:36:58,853 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:36:58,988 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked.
[2023-11-29 02:36:58,988 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:36:58,989 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:36:58,989 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903140146]
[2023-11-29 02:36:58,989 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:36:58,989 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775731996]
[2023-11-29 02:36:58,989 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775731996] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:36:58,989 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:36:58,990 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:36:58,990 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34783673]
[2023-11-29 02:36:58,990 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:36:58,993 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:36:58,993 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:36:58,995 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:36:58,995 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:36:58,996 INFO  L87              Difference]: Start difference. First operand 5067 states and 8459 transitions. Second operand  has 7 states, 7 states have (on average 409.85714285714283) internal successors, (2869), 7 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:59,300 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:36:59,300 INFO  L93              Difference]: Finished difference Result 14096 states and 23537 transitions.
[2023-11-29 02:36:59,300 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:36:59,301 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 409.85714285714283) internal successors, (2869), 7 states have internal predecessors, (2869), 0 states have call successors, (0), 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 3124
[2023-11-29 02:36:59,303 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:36:59,310 INFO  L225             Difference]: With dead ends: 14096
[2023-11-29 02:36:59,310 INFO  L226             Difference]: Without dead ends: 9548
[2023-11-29 02:36:59,313 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3133 GetRequests, 3121 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:36:59,314 INFO  L413           NwaCegarLoop]: 8352 mSDtfsCounter, 21906 mSDsluCounter, 32752 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21906 SdHoareTripleChecker+Valid, 41104 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:36:59,314 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21906 Valid, 41104 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:36:59,321 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9548 states.
[2023-11-29 02:36:59,361 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9548 to 5069.
[2023-11-29 02:36:59,365 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5069 states, 5068 states have (on average 1.669494869771113) internal successors, (8461), 5068 states have internal predecessors, (8461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:59,369 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5069 states to 5069 states and 8461 transitions.
[2023-11-29 02:36:59,370 INFO  L78                 Accepts]: Start accepts. Automaton has 5069 states and 8461 transitions. Word has length 3124
[2023-11-29 02:36:59,371 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:36:59,371 INFO  L495      AbstractCegarLoop]: Abstraction has 5069 states and 8461 transitions.
[2023-11-29 02:36:59,372 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 409.85714285714283) internal successors, (2869), 7 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:36:59,372 INFO  L276                IsEmpty]: Start isEmpty. Operand 5069 states and 8461 transitions.
[2023-11-29 02:36:59,413 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3126
[2023-11-29 02:36:59,413 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:36:59,414 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:36:59,445 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0
[2023-11-29 02:36:59,614 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33
[2023-11-29 02:36:59,615 INFO  L420      AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:36:59,615 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:36:59,615 INFO  L85        PathProgramCache]: Analyzing trace with hash -1187008396, now seen corresponding path program 1 times
[2023-11-29 02:36:59,615 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:36:59,616 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844171840]
[2023-11-29 02:36:59,616 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:59,616 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:36:59,812 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:36:59,812 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999577790]
[2023-11-29 02:36:59,813 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:36:59,813 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:36:59,813 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:36:59,814 INFO  L229       MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:36:59,814 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process
[2023-11-29 02:37:02,423 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:37:02,491 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12681 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:37:02,522 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:37:02,661 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked.
[2023-11-29 02:37:02,661 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:37:02,661 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:37:02,661 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844171840]
[2023-11-29 02:37:02,661 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:37:02,661 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999577790]
[2023-11-29 02:37:02,661 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [999577790] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:37:02,661 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:37:02,663 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:37:02,663 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199894586]
[2023-11-29 02:37:02,663 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:37:02,664 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:37:02,665 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:37:02,666 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:37:02,666 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:37:02,667 INFO  L87              Difference]: Start difference. First operand 5069 states and 8461 transitions. Second operand  has 7 states, 7 states have (on average 410.2857142857143) internal successors, (2872), 7 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:03,003 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:37:03,003 INFO  L93              Difference]: Finished difference Result 14102 states and 23543 transitions.
[2023-11-29 02:37:03,003 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:37:03,004 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 410.2857142857143) internal successors, (2872), 7 states have internal predecessors, (2872), 0 states have call successors, (0), 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 3125
[2023-11-29 02:37:03,006 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:37:03,013 INFO  L225             Difference]: With dead ends: 14102
[2023-11-29 02:37:03,014 INFO  L226             Difference]: Without dead ends: 9549
[2023-11-29 02:37:03,017 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3134 GetRequests, 3122 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:37:03,017 INFO  L413           NwaCegarLoop]: 8347 mSDtfsCounter, 21905 mSDsluCounter, 32737 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21905 SdHoareTripleChecker+Valid, 41084 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:37:03,018 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21905 Valid, 41084 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:37:03,025 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9549 states.
[2023-11-29 02:37:03,064 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9549 to 5071.
[2023-11-29 02:37:03,068 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5071 states, 5070 states have (on average 1.6692307692307693) internal successors, (8463), 5070 states have internal predecessors, (8463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:03,073 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5071 states to 5071 states and 8463 transitions.
[2023-11-29 02:37:03,073 INFO  L78                 Accepts]: Start accepts. Automaton has 5071 states and 8463 transitions. Word has length 3125
[2023-11-29 02:37:03,075 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:37:03,075 INFO  L495      AbstractCegarLoop]: Abstraction has 5071 states and 8463 transitions.
[2023-11-29 02:37:03,075 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 410.2857142857143) internal successors, (2872), 7 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:03,075 INFO  L276                IsEmpty]: Start isEmpty. Operand 5071 states and 8463 transitions.
[2023-11-29 02:37:03,117 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3127
[2023-11-29 02:37:03,117 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:37:03,118 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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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]
[2023-11-29 02:37:03,150 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0
[2023-11-29 02:37:03,318 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34
[2023-11-29 02:37:03,318 INFO  L420      AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:37:03,319 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:37:03,319 INFO  L85        PathProgramCache]: Analyzing trace with hash 344801368, now seen corresponding path program 1 times
[2023-11-29 02:37:03,319 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:37:03,319 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974712217]
[2023-11-29 02:37:03,320 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:03,320 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:37:03,516 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:37:03,516 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [306651434]
[2023-11-29 02:37:03,516 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:03,517 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:37:03,517 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:37:03,517 INFO  L229       MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:37:03,518 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process
[2023-11-29 02:37:06,129 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:37:06,195 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12684 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:37:06,226 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:37:06,369 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked.
[2023-11-29 02:37:06,369 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:37:06,369 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:37:06,369 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974712217]
[2023-11-29 02:37:06,369 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:37:06,369 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306651434]
[2023-11-29 02:37:06,370 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [306651434] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:37:06,370 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:37:06,370 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:37:06,370 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855660087]
[2023-11-29 02:37:06,371 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:37:06,372 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:37:06,372 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:37:06,374 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:37:06,374 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:37:06,374 INFO  L87              Difference]: Start difference. First operand 5071 states and 8463 transitions. Second operand  has 7 states, 7 states have (on average 411.0) internal successors, (2877), 7 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:06,669 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:37:06,669 INFO  L93              Difference]: Finished difference Result 14111 states and 23554 transitions.
[2023-11-29 02:37:06,670 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:37:06,670 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 411.0) internal successors, (2877), 7 states have internal predecessors, (2877), 0 states have call successors, (0), 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 3126
[2023-11-29 02:37:06,673 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:37:06,681 INFO  L225             Difference]: With dead ends: 14111
[2023-11-29 02:37:06,681 INFO  L226             Difference]: Without dead ends: 9553
[2023-11-29 02:37:06,684 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3135 GetRequests, 3123 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:37:06,685 INFO  L413           NwaCegarLoop]: 8337 mSDtfsCounter, 21907 mSDsluCounter, 32707 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21907 SdHoareTripleChecker+Valid, 41044 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:37:06,685 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21907 Valid, 41044 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:37:06,691 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9553 states.
[2023-11-29 02:37:06,729 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9553 to 5076.
[2023-11-29 02:37:06,733 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5076 states, 5075 states have (on average 1.6689655172413793) internal successors, (8470), 5075 states have internal predecessors, (8470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:06,737 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5076 states to 5076 states and 8470 transitions.
[2023-11-29 02:37:06,737 INFO  L78                 Accepts]: Start accepts. Automaton has 5076 states and 8470 transitions. Word has length 3126
[2023-11-29 02:37:06,739 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:37:06,739 INFO  L495      AbstractCegarLoop]: Abstraction has 5076 states and 8470 transitions.
[2023-11-29 02:37:06,739 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 411.0) internal successors, (2877), 7 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:06,740 INFO  L276                IsEmpty]: Start isEmpty. Operand 5076 states and 8470 transitions.
[2023-11-29 02:37:06,781 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3128
[2023-11-29 02:37:06,781 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:37:06,782 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:37:06,813 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0
[2023-11-29 02:37:06,982 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35
[2023-11-29 02:37:06,982 INFO  L420      AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:37:06,982 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:37:06,983 INFO  L85        PathProgramCache]: Analyzing trace with hash 860562856, now seen corresponding path program 1 times
[2023-11-29 02:37:06,983 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:37:06,983 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325655986]
[2023-11-29 02:37:06,984 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:06,984 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:37:07,176 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:37:07,177 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2032902377]
[2023-11-29 02:37:07,177 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:07,177 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:37:07,177 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:37:07,178 INFO  L229       MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:37:07,179 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process
[2023-11-29 02:37:09,885 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:37:09,958 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12687 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:37:09,993 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:37:10,147 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked.
[2023-11-29 02:37:10,147 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:37:10,147 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:37:10,147 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325655986]
[2023-11-29 02:37:10,147 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:37:10,147 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032902377]
[2023-11-29 02:37:10,148 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032902377] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:37:10,148 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:37:10,149 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:37:10,149 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57067292]
[2023-11-29 02:37:10,149 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:37:10,151 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:37:10,151 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:37:10,153 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:37:10,154 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:37:10,154 INFO  L87              Difference]: Start difference. First operand 5076 states and 8470 transitions. Second operand  has 7 states, 7 states have (on average 411.42857142857144) internal successors, (2880), 7 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:10,452 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:37:10,452 INFO  L93              Difference]: Finished difference Result 14123 states and 23570 transitions.
[2023-11-29 02:37:10,452 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:37:10,453 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 411.42857142857144) internal successors, (2880), 7 states have internal predecessors, (2880), 0 states have call successors, (0), 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 3127
[2023-11-29 02:37:10,455 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:37:10,462 INFO  L225             Difference]: With dead ends: 14123
[2023-11-29 02:37:10,463 INFO  L226             Difference]: Without dead ends: 9554
[2023-11-29 02:37:10,466 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3136 GetRequests, 3124 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:37:10,467 INFO  L413           NwaCegarLoop]: 8332 mSDtfsCounter, 21908 mSDsluCounter, 32692 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21908 SdHoareTripleChecker+Valid, 41024 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:37:10,467 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21908 Valid, 41024 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:37:10,475 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9554 states.
[2023-11-29 02:37:10,520 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9554 to 5078.
[2023-11-29 02:37:10,525 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5078 states, 5077 states have (on average 1.6687019893637975) internal successors, (8472), 5077 states have internal predecessors, (8472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:10,531 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5078 states to 5078 states and 8472 transitions.
[2023-11-29 02:37:10,531 INFO  L78                 Accepts]: Start accepts. Automaton has 5078 states and 8472 transitions. Word has length 3127
[2023-11-29 02:37:10,532 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:37:10,532 INFO  L495      AbstractCegarLoop]: Abstraction has 5078 states and 8472 transitions.
[2023-11-29 02:37:10,533 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 411.42857142857144) internal successors, (2880), 7 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:10,533 INFO  L276                IsEmpty]: Start isEmpty. Operand 5078 states and 8472 transitions.
[2023-11-29 02:37:10,577 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3129
[2023-11-29 02:37:10,577 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:37:10,578 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:37:10,613 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0
[2023-11-29 02:37:10,778 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36
[2023-11-29 02:37:10,779 INFO  L420      AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:37:10,779 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:37:10,780 INFO  L85        PathProgramCache]: Analyzing trace with hash 790896382, now seen corresponding path program 1 times
[2023-11-29 02:37:10,780 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:37:10,780 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680331457]
[2023-11-29 02:37:10,780 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:10,780 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:37:10,986 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:37:10,987 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [123251869]
[2023-11-29 02:37:10,987 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:10,987 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:37:10,988 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:37:10,988 INFO  L229       MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:37:10,989 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process
[2023-11-29 02:37:13,718 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:37:13,796 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12690 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:37:13,833 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:37:13,975 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked.
[2023-11-29 02:37:13,976 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:37:13,976 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:37:13,976 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680331457]
[2023-11-29 02:37:13,976 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:37:13,976 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123251869]
[2023-11-29 02:37:13,976 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [123251869] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:37:13,976 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:37:13,977 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:37:13,977 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592591309]
[2023-11-29 02:37:13,977 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:37:13,980 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:37:13,980 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:37:13,982 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:37:13,982 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:37:13,983 INFO  L87              Difference]: Start difference. First operand 5078 states and 8472 transitions. Second operand  has 7 states, 7 states have (on average 412.14285714285717) internal successors, (2885), 7 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:14,280 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:37:14,280 INFO  L93              Difference]: Finished difference Result 14132 states and 23581 transitions.
[2023-11-29 02:37:14,281 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:37:14,282 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 412.14285714285717) internal successors, (2885), 7 states have internal predecessors, (2885), 0 states have call successors, (0), 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 3128
[2023-11-29 02:37:14,283 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:37:14,291 INFO  L225             Difference]: With dead ends: 14132
[2023-11-29 02:37:14,291 INFO  L226             Difference]: Without dead ends: 9558
[2023-11-29 02:37:14,294 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3137 GetRequests, 3125 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:37:14,295 INFO  L413           NwaCegarLoop]: 8322 mSDtfsCounter, 21910 mSDsluCounter, 32662 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21910 SdHoareTripleChecker+Valid, 40984 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:37:14,295 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21910 Valid, 40984 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:37:14,303 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9558 states.
[2023-11-29 02:37:14,349 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9558 to 5083.
[2023-11-29 02:37:14,354 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5083 states, 5082 states have (on average 1.6684376229830775) internal successors, (8479), 5082 states have internal predecessors, (8479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:14,360 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5083 states to 5083 states and 8479 transitions.
[2023-11-29 02:37:14,360 INFO  L78                 Accepts]: Start accepts. Automaton has 5083 states and 8479 transitions. Word has length 3128
[2023-11-29 02:37:14,361 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:37:14,361 INFO  L495      AbstractCegarLoop]: Abstraction has 5083 states and 8479 transitions.
[2023-11-29 02:37:14,362 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 412.14285714285717) internal successors, (2885), 7 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:14,362 INFO  L276                IsEmpty]: Start isEmpty. Operand 5083 states and 8479 transitions.
[2023-11-29 02:37:14,407 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3130
[2023-11-29 02:37:14,408 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:37:14,409 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:37:14,442 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0
[2023-11-29 02:37:14,609 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37
[2023-11-29 02:37:14,609 INFO  L420      AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:37:14,609 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:37:14,610 INFO  L85        PathProgramCache]: Analyzing trace with hash -883593570, now seen corresponding path program 1 times
[2023-11-29 02:37:14,610 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:37:14,610 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129827490]
[2023-11-29 02:37:14,611 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:14,611 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:37:14,815 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:37:14,815 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241268989]
[2023-11-29 02:37:14,816 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:14,816 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:37:14,816 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:37:14,816 INFO  L229       MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:37:14,817 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process
[2023-11-29 02:37:17,433 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:37:17,510 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12694 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:37:17,547 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:37:17,691 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked.
[2023-11-29 02:37:17,691 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:37:17,691 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:37:17,691 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129827490]
[2023-11-29 02:37:17,691 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:37:17,691 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241268989]
[2023-11-29 02:37:17,692 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241268989] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:37:17,692 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:37:17,693 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:37:17,693 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998924943]
[2023-11-29 02:37:17,693 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:37:17,694 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:37:17,694 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:37:17,696 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:37:17,696 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:37:17,696 INFO  L87              Difference]: Start difference. First operand 5083 states and 8479 transitions. Second operand  has 7 states, 7 states have (on average 412.85714285714283) internal successors, (2890), 7 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:17,994 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:37:17,994 INFO  L93              Difference]: Finished difference Result 14147 states and 23602 transitions.
[2023-11-29 02:37:17,995 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:37:17,995 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 412.85714285714283) internal successors, (2890), 7 states have internal predecessors, (2890), 0 states have call successors, (0), 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 3129
[2023-11-29 02:37:17,997 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:37:18,005 INFO  L225             Difference]: With dead ends: 14147
[2023-11-29 02:37:18,005 INFO  L226             Difference]: Without dead ends: 9562
[2023-11-29 02:37:18,009 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3138 GetRequests, 3126 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:37:18,010 INFO  L413           NwaCegarLoop]: 8312 mSDtfsCounter, 21914 mSDsluCounter, 32632 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21914 SdHoareTripleChecker+Valid, 40944 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:37:18,010 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21914 Valid, 40944 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:37:18,018 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9562 states.
[2023-11-29 02:37:18,065 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9562 to 5088.
[2023-11-29 02:37:18,069 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5088 states, 5087 states have (on average 1.6681737762925104) internal successors, (8486), 5087 states have internal predecessors, (8486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:18,075 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 8486 transitions.
[2023-11-29 02:37:18,076 INFO  L78                 Accepts]: Start accepts. Automaton has 5088 states and 8486 transitions. Word has length 3129
[2023-11-29 02:37:18,077 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:37:18,077 INFO  L495      AbstractCegarLoop]: Abstraction has 5088 states and 8486 transitions.
[2023-11-29 02:37:18,078 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 412.85714285714283) internal successors, (2890), 7 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:18,078 INFO  L276                IsEmpty]: Start isEmpty. Operand 5088 states and 8486 transitions.
[2023-11-29 02:37:18,124 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3131
[2023-11-29 02:37:18,124 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:37:18,125 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:37:18,159 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0
[2023-11-29 02:37:18,326 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38
[2023-11-29 02:37:18,326 INFO  L420      AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:37:18,326 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:37:18,327 INFO  L85        PathProgramCache]: Analyzing trace with hash 2013382668, now seen corresponding path program 1 times
[2023-11-29 02:37:18,327 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:37:18,327 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531230507]
[2023-11-29 02:37:18,327 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:18,327 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:37:18,536 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:37:18,536 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360761905]
[2023-11-29 02:37:18,537 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:18,537 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:37:18,537 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:37:18,538 INFO  L229       MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:37:18,538 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process
[2023-11-29 02:37:21,264 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:37:21,343 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12697 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:37:21,395 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:37:21,536 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked.
[2023-11-29 02:37:21,536 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:37:21,536 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:37:21,536 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531230507]
[2023-11-29 02:37:21,537 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:37:21,537 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360761905]
[2023-11-29 02:37:21,537 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360761905] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:37:21,537 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:37:21,538 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:37:21,538 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008229679]
[2023-11-29 02:37:21,538 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:37:21,540 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:37:21,540 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:37:21,542 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:37:21,542 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:37:21,542 INFO  L87              Difference]: Start difference. First operand 5088 states and 8486 transitions. Second operand  has 7 states, 7 states have (on average 413.2857142857143) internal successors, (2893), 7 states have internal predecessors, (2893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:21,839 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:37:21,839 INFO  L93              Difference]: Finished difference Result 14159 states and 23618 transitions.
[2023-11-29 02:37:21,839 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:37:21,840 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 413.2857142857143) internal successors, (2893), 7 states have internal predecessors, (2893), 0 states have call successors, (0), 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 3130
[2023-11-29 02:37:21,842 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:37:21,850 INFO  L225             Difference]: With dead ends: 14159
[2023-11-29 02:37:21,850 INFO  L226             Difference]: Without dead ends: 9563
[2023-11-29 02:37:21,854 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3139 GetRequests, 3127 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:37:21,854 INFO  L413           NwaCegarLoop]: 8307 mSDtfsCounter, 21915 mSDsluCounter, 32617 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21915 SdHoareTripleChecker+Valid, 40924 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:37:21,854 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21915 Valid, 40924 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:37:21,862 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9563 states.
[2023-11-29 02:37:21,910 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9563 to 5090.
[2023-11-29 02:37:21,915 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5090 states, 5089 states have (on average 1.6679111809785812) internal successors, (8488), 5089 states have internal predecessors, (8488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:21,921 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5090 states to 5090 states and 8488 transitions.
[2023-11-29 02:37:21,921 INFO  L78                 Accepts]: Start accepts. Automaton has 5090 states and 8488 transitions. Word has length 3130
[2023-11-29 02:37:21,922 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:37:21,922 INFO  L495      AbstractCegarLoop]: Abstraction has 5090 states and 8488 transitions.
[2023-11-29 02:37:21,923 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 413.2857142857143) internal successors, (2893), 7 states have internal predecessors, (2893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:21,923 INFO  L276                IsEmpty]: Start isEmpty. Operand 5090 states and 8488 transitions.
[2023-11-29 02:37:21,996 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3132
[2023-11-29 02:37:21,996 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:37:21,997 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:37:22,031 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0
[2023-11-29 02:37:22,197 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39
[2023-11-29 02:37:22,198 INFO  L420      AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:37:22,199 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:37:22,199 INFO  L85        PathProgramCache]: Analyzing trace with hash -1827953288, now seen corresponding path program 1 times
[2023-11-29 02:37:22,199 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:37:22,199 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038771218]
[2023-11-29 02:37:22,199 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:22,199 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:37:22,408 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:37:22,409 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188409338]
[2023-11-29 02:37:22,409 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:22,409 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:37:22,409 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:37:22,410 INFO  L229       MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:37:22,411 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process
[2023-11-29 02:37:25,064 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:37:25,143 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12700 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:37:25,180 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:37:25,326 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked.
[2023-11-29 02:37:25,326 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:37:25,326 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:37:25,326 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038771218]
[2023-11-29 02:37:25,326 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:37:25,326 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188409338]
[2023-11-29 02:37:25,326 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [188409338] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:37:25,326 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:37:25,327 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:37:25,327 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495006571]
[2023-11-29 02:37:25,327 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:37:25,329 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:37:25,329 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:37:25,331 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:37:25,331 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:37:25,332 INFO  L87              Difference]: Start difference. First operand 5090 states and 8488 transitions. Second operand  has 7 states, 7 states have (on average 414.0) internal successors, (2898), 7 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:25,644 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:37:25,644 INFO  L93              Difference]: Finished difference Result 14168 states and 23629 transitions.
[2023-11-29 02:37:25,644 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:37:25,645 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 414.0) internal successors, (2898), 7 states have internal predecessors, (2898), 0 states have call successors, (0), 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 3131
[2023-11-29 02:37:25,647 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:37:25,654 INFO  L225             Difference]: With dead ends: 14168
[2023-11-29 02:37:25,654 INFO  L226             Difference]: Without dead ends: 9567
[2023-11-29 02:37:25,657 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3140 GetRequests, 3128 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:37:25,658 INFO  L413           NwaCegarLoop]: 8297 mSDtfsCounter, 21917 mSDsluCounter, 32587 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21917 SdHoareTripleChecker+Valid, 40884 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:37:25,658 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21917 Valid, 40884 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:37:25,667 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9567 states.
[2023-11-29 02:37:25,707 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9567 to 5095.
[2023-11-29 02:37:25,711 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5095 states, 5094 states have (on average 1.6676482135846094) internal successors, (8495), 5094 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)
[2023-11-29 02:37:25,716 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5095 states to 5095 states and 8495 transitions.
[2023-11-29 02:37:25,716 INFO  L78                 Accepts]: Start accepts. Automaton has 5095 states and 8495 transitions. Word has length 3131
[2023-11-29 02:37:25,717 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:37:25,717 INFO  L495      AbstractCegarLoop]: Abstraction has 5095 states and 8495 transitions.
[2023-11-29 02:37:25,718 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 414.0) internal successors, (2898), 7 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:25,718 INFO  L276                IsEmpty]: Start isEmpty. Operand 5095 states and 8495 transitions.
[2023-11-29 02:37:25,760 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3133
[2023-11-29 02:37:25,760 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:37:25,760 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:37:25,791 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0
[2023-11-29 02:37:25,961 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:37:25,961 INFO  L420      AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:37:25,961 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:37:25,962 INFO  L85        PathProgramCache]: Analyzing trace with hash -268028584, now seen corresponding path program 1 times
[2023-11-29 02:37:25,962 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:37:25,962 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106761826]
[2023-11-29 02:37:25,962 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:25,962 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:37:26,161 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:37:26,162 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585041514]
[2023-11-29 02:37:26,162 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:26,162 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:37:26,162 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:37:26,163 INFO  L229       MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:37:26,164 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process
[2023-11-29 02:37:28,828 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:37:28,894 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12703 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:37:28,929 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:37:29,073 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked.
[2023-11-29 02:37:29,073 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:37:29,073 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:37:29,073 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106761826]
[2023-11-29 02:37:29,073 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:37:29,073 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585041514]
[2023-11-29 02:37:29,073 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585041514] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:37:29,073 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:37:29,074 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:37:29,075 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828757152]
[2023-11-29 02:37:29,075 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:37:29,077 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:37:29,077 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:37:29,079 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:37:29,079 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:37:29,080 INFO  L87              Difference]: Start difference. First operand 5095 states and 8495 transitions. Second operand  has 7 states, 7 states have (on average 414.7142857142857) internal successors, (2903), 7 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:29,399 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:37:29,399 INFO  L93              Difference]: Finished difference Result 14183 states and 23650 transitions.
[2023-11-29 02:37:29,399 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:37:29,400 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 414.7142857142857) internal successors, (2903), 7 states have internal predecessors, (2903), 0 states have call successors, (0), 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 3132
[2023-11-29 02:37:29,402 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:37:29,408 INFO  L225             Difference]: With dead ends: 14183
[2023-11-29 02:37:29,408 INFO  L226             Difference]: Without dead ends: 9571
[2023-11-29 02:37:29,411 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3141 GetRequests, 3129 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:37:29,411 INFO  L413           NwaCegarLoop]: 8287 mSDtfsCounter, 21921 mSDsluCounter, 32557 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21921 SdHoareTripleChecker+Valid, 40844 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:37:29,411 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21921 Valid, 40844 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:37:29,418 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9571 states.
[2023-11-29 02:37:29,459 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9571 to 5100.
[2023-11-29 02:37:29,463 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5100 states, 5099 states have (on average 1.6673857619141008) internal successors, (8502), 5099 states have internal predecessors, (8502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:29,468 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5100 states to 5100 states and 8502 transitions.
[2023-11-29 02:37:29,468 INFO  L78                 Accepts]: Start accepts. Automaton has 5100 states and 8502 transitions. Word has length 3132
[2023-11-29 02:37:29,469 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:37:29,469 INFO  L495      AbstractCegarLoop]: Abstraction has 5100 states and 8502 transitions.
[2023-11-29 02:37:29,470 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 414.7142857142857) internal successors, (2903), 7 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:29,470 INFO  L276                IsEmpty]: Start isEmpty. Operand 5100 states and 8502 transitions.
[2023-11-29 02:37:29,512 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3134
[2023-11-29 02:37:29,512 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:37:29,512 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:37:29,544 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0
[2023-11-29 02:37:29,713 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41
[2023-11-29 02:37:29,713 INFO  L420      AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:37:29,713 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:37:29,714 INFO  L85        PathProgramCache]: Analyzing trace with hash 1649467692, now seen corresponding path program 1 times
[2023-11-29 02:37:29,714 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:37:29,714 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206274186]
[2023-11-29 02:37:29,715 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:29,715 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:37:29,909 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:37:29,909 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909374001]
[2023-11-29 02:37:29,910 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:29,910 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:37:29,910 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:37:29,911 INFO  L229       MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:37:29,912 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process
[2023-11-29 02:37:32,489 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:37:32,556 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12706 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:37:32,586 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:37:32,719 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked.
[2023-11-29 02:37:32,719 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:37:32,719 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:37:32,720 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206274186]
[2023-11-29 02:37:32,720 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:37:32,720 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909374001]
[2023-11-29 02:37:32,720 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909374001] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:37:32,720 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:37:32,721 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:37:32,721 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835641018]
[2023-11-29 02:37:32,721 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:37:32,722 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:37:32,722 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:37:32,724 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:37:32,724 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:37:32,725 INFO  L87              Difference]: Start difference. First operand 5100 states and 8502 transitions. Second operand  has 7 states, 7 states have (on average 415.14285714285717) internal successors, (2906), 7 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:33,024 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:37:33,025 INFO  L93              Difference]: Finished difference Result 14195 states and 23666 transitions.
[2023-11-29 02:37:33,025 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:37:33,026 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 415.14285714285717) internal successors, (2906), 7 states have internal predecessors, (2906), 0 states have call successors, (0), 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 3133
[2023-11-29 02:37:33,028 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:37:33,034 INFO  L225             Difference]: With dead ends: 14195
[2023-11-29 02:37:33,035 INFO  L226             Difference]: Without dead ends: 9572
[2023-11-29 02:37:33,038 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3142 GetRequests, 3130 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:37:33,038 INFO  L413           NwaCegarLoop]: 8282 mSDtfsCounter, 21922 mSDsluCounter, 32542 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21922 SdHoareTripleChecker+Valid, 40824 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:37:33,038 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21922 Valid, 40824 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:37:33,045 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9572 states.
[2023-11-29 02:37:33,086 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9572 to 5102.
[2023-11-29 02:37:33,090 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5102 states, 5101 states have (on average 1.6671240933150362) internal successors, (8504), 5101 states have internal predecessors, (8504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:33,095 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5102 states to 5102 states and 8504 transitions.
[2023-11-29 02:37:33,095 INFO  L78                 Accepts]: Start accepts. Automaton has 5102 states and 8504 transitions. Word has length 3133
[2023-11-29 02:37:33,096 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:37:33,096 INFO  L495      AbstractCegarLoop]: Abstraction has 5102 states and 8504 transitions.
[2023-11-29 02:37:33,097 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 415.14285714285717) internal successors, (2906), 7 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:33,097 INFO  L276                IsEmpty]: Start isEmpty. Operand 5102 states and 8504 transitions.
[2023-11-29 02:37:33,139 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3135
[2023-11-29 02:37:33,139 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:37:33,140 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:37:33,170 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0
[2023-11-29 02:37:33,340 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42
[2023-11-29 02:37:33,340 INFO  L420      AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:37:33,340 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:37:33,341 INFO  L85        PathProgramCache]: Analyzing trace with hash -1651209028, now seen corresponding path program 1 times
[2023-11-29 02:37:33,341 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:37:33,341 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469557234]
[2023-11-29 02:37:33,341 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:33,341 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:37:33,537 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:37:33,537 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078302458]
[2023-11-29 02:37:33,538 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:33,538 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:37:33,538 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:37:33,539 INFO  L229       MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:37:33,539 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process
[2023-11-29 02:37:36,203 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:37:36,268 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12710 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:37:36,297 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:37:36,431 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked.
[2023-11-29 02:37:36,431 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:37:36,432 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:37:36,432 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469557234]
[2023-11-29 02:37:36,432 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:37:36,432 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078302458]
[2023-11-29 02:37:36,432 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078302458] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:37:36,432 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:37:36,433 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:37:36,433 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276552332]
[2023-11-29 02:37:36,433 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:37:36,434 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:37:36,434 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:37:36,436 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:37:36,436 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:37:36,436 INFO  L87              Difference]: Start difference. First operand 5102 states and 8504 transitions. Second operand  has 7 states, 7 states have (on average 415.85714285714283) internal successors, (2911), 7 states have internal predecessors, (2911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:36,730 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:37:36,731 INFO  L93              Difference]: Finished difference Result 14204 states and 23677 transitions.
[2023-11-29 02:37:36,731 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:37:36,732 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 415.85714285714283) internal successors, (2911), 7 states have internal predecessors, (2911), 0 states have call successors, (0), 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 3134
[2023-11-29 02:37:36,734 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:37:36,741 INFO  L225             Difference]: With dead ends: 14204
[2023-11-29 02:37:36,741 INFO  L226             Difference]: Without dead ends: 9576
[2023-11-29 02:37:36,745 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3143 GetRequests, 3131 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:37:36,745 INFO  L413           NwaCegarLoop]: 8272 mSDtfsCounter, 21924 mSDsluCounter, 32512 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21924 SdHoareTripleChecker+Valid, 40784 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:37:36,745 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21924 Valid, 40784 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:37:36,752 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9576 states.
[2023-11-29 02:37:36,792 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9576 to 5107.
[2023-11-29 02:37:36,796 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5107 states, 5106 states have (on average 1.6668625146886016) internal successors, (8511), 5106 states have internal predecessors, (8511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:36,801 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5107 states to 5107 states and 8511 transitions.
[2023-11-29 02:37:36,801 INFO  L78                 Accepts]: Start accepts. Automaton has 5107 states and 8511 transitions. Word has length 3134
[2023-11-29 02:37:36,802 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:37:36,802 INFO  L495      AbstractCegarLoop]: Abstraction has 5107 states and 8511 transitions.
[2023-11-29 02:37:36,803 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 415.85714285714283) internal successors, (2911), 7 states have internal predecessors, (2911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:36,803 INFO  L276                IsEmpty]: Start isEmpty. Operand 5107 states and 8511 transitions.
[2023-11-29 02:37:36,845 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3136
[2023-11-29 02:37:36,845 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:37:36,845 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:37:36,877 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0
[2023-11-29 02:37:37,046 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:37:37,046 INFO  L420      AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:37:37,046 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:37:37,047 INFO  L85        PathProgramCache]: Analyzing trace with hash -1372196130, now seen corresponding path program 1 times
[2023-11-29 02:37:37,047 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:37:37,047 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55752014]
[2023-11-29 02:37:37,047 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:37,047 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:37:37,243 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:37:37,243 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [751174326]
[2023-11-29 02:37:37,244 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:37,244 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:37:37,244 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:37:37,244 INFO  L229       MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:37:37,245 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process
[2023-11-29 02:37:39,833 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:37:39,900 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12713 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:37:39,931 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:37:40,078 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked.
[2023-11-29 02:37:40,078 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:37:40,078 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:37:40,078 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55752014]
[2023-11-29 02:37:40,078 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:37:40,078 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751174326]
[2023-11-29 02:37:40,078 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [751174326] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:37:40,078 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:37:40,079 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:37:40,079 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666192327]
[2023-11-29 02:37:40,080 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:37:40,081 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:37:40,081 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:37:40,082 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:37:40,082 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:37:40,083 INFO  L87              Difference]: Start difference. First operand 5107 states and 8511 transitions. Second operand  has 7 states, 7 states have (on average 416.57142857142856) internal successors, (2916), 7 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:40,391 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:37:40,391 INFO  L93              Difference]: Finished difference Result 14219 states and 23698 transitions.
[2023-11-29 02:37:40,391 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:37:40,392 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 416.57142857142856) internal successors, (2916), 7 states have internal predecessors, (2916), 0 states have call successors, (0), 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 3135
[2023-11-29 02:37:40,394 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:37:40,401 INFO  L225             Difference]: With dead ends: 14219
[2023-11-29 02:37:40,401 INFO  L226             Difference]: Without dead ends: 9580
[2023-11-29 02:37:40,404 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3144 GetRequests, 3132 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:37:40,405 INFO  L413           NwaCegarLoop]: 8262 mSDtfsCounter, 21928 mSDsluCounter, 32482 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21928 SdHoareTripleChecker+Valid, 40744 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:37:40,405 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21928 Valid, 40744 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:37:40,412 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9580 states.
[2023-11-29 02:37:40,452 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9580 to 5112.
[2023-11-29 02:37:40,456 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5112 states, 5111 states have (on average 1.6666014478575621) internal successors, (8518), 5111 states have internal predecessors, (8518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:40,461 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5112 states to 5112 states and 8518 transitions.
[2023-11-29 02:37:40,461 INFO  L78                 Accepts]: Start accepts. Automaton has 5112 states and 8518 transitions. Word has length 3135
[2023-11-29 02:37:40,463 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:37:40,463 INFO  L495      AbstractCegarLoop]: Abstraction has 5112 states and 8518 transitions.
[2023-11-29 02:37:40,463 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 416.57142857142856) internal successors, (2916), 7 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:40,463 INFO  L276                IsEmpty]: Start isEmpty. Operand 5112 states and 8518 transitions.
[2023-11-29 02:37:40,505 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3137
[2023-11-29 02:37:40,505 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:37:40,506 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, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:37:40,537 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0
[2023-11-29 02:37:40,706 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:37:40,707 INFO  L420      AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:37:40,707 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:37:40,707 INFO  L85        PathProgramCache]: Analyzing trace with hash 421522438, now seen corresponding path program 1 times
[2023-11-29 02:37:40,707 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:37:40,707 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67795826]
[2023-11-29 02:37:40,708 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:40,708 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:37:40,904 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:37:40,904 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1655449781]
[2023-11-29 02:37:40,905 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:40,905 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:37:40,905 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:37:40,906 INFO  L229       MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:37:40,908 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process
[2023-11-29 02:37:43,497 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:37:43,565 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12717 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:37:43,595 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:37:43,728 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked.
[2023-11-29 02:37:43,728 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:37:43,728 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:37:43,728 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67795826]
[2023-11-29 02:37:43,728 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:37:43,728 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655449781]
[2023-11-29 02:37:43,728 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655449781] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:37:43,729 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:37:43,730 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:37:43,730 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849052465]
[2023-11-29 02:37:43,730 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:37:43,731 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:37:43,732 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:37:43,733 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:37:43,733 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:37:43,733 INFO  L87              Difference]: Start difference. First operand 5112 states and 8518 transitions. Second operand  has 7 states, 7 states have (on average 417.0) internal successors, (2919), 7 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:44,022 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:37:44,022 INFO  L93              Difference]: Finished difference Result 14231 states and 23714 transitions.
[2023-11-29 02:37:44,022 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:37:44,023 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 417.0) internal successors, (2919), 7 states have internal predecessors, (2919), 0 states have call successors, (0), 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 3136
[2023-11-29 02:37:44,025 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:37:44,032 INFO  L225             Difference]: With dead ends: 14231
[2023-11-29 02:37:44,032 INFO  L226             Difference]: Without dead ends: 9581
[2023-11-29 02:37:44,035 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3145 GetRequests, 3133 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:37:44,035 INFO  L413           NwaCegarLoop]: 8257 mSDtfsCounter, 21929 mSDsluCounter, 32467 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21929 SdHoareTripleChecker+Valid, 40724 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:37:44,036 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21929 Valid, 40724 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:37:44,043 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9581 states.
[2023-11-29 02:37:44,083 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9581 to 5114.
[2023-11-29 02:37:44,087 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5114 states, 5113 states have (on average 1.666340700176022) internal successors, (8520), 5113 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:44,092 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5114 states to 5114 states and 8520 transitions.
[2023-11-29 02:37:44,093 INFO  L78                 Accepts]: Start accepts. Automaton has 5114 states and 8520 transitions. Word has length 3136
[2023-11-29 02:37:44,094 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:37:44,094 INFO  L495      AbstractCegarLoop]: Abstraction has 5114 states and 8520 transitions.
[2023-11-29 02:37:44,095 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 417.0) internal successors, (2919), 7 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:44,095 INFO  L276                IsEmpty]: Start isEmpty. Operand 5114 states and 8520 transitions.
[2023-11-29 02:37:44,136 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3138
[2023-11-29 02:37:44,136 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:37:44,137 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, 2, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:37:44,168 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0
[2023-11-29 02:37:44,337 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:37:44,338 INFO  L420      AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:37:44,338 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:37:44,338 INFO  L85        PathProgramCache]: Analyzing trace with hash -1386380554, now seen corresponding path program 1 times
[2023-11-29 02:37:44,338 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:37:44,339 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438060297]
[2023-11-29 02:37:44,339 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:44,339 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:37:44,534 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:37:44,534 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606860834]
[2023-11-29 02:37:44,535 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:44,535 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:37:44,535 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:37:44,536 INFO  L229       MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:37:44,537 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process
[2023-11-29 02:37:47,222 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:37:47,289 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12720 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:37:47,321 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:37:47,462 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked.
[2023-11-29 02:37:47,462 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:37:47,463 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:37:47,463 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438060297]
[2023-11-29 02:37:47,463 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:37:47,463 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606860834]
[2023-11-29 02:37:47,463 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [606860834] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:37:47,463 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:37:47,464 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:37:47,464 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659214108]
[2023-11-29 02:37:47,464 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:37:47,466 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:37:47,466 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:37:47,467 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:37:47,467 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:37:47,468 INFO  L87              Difference]: Start difference. First operand 5114 states and 8520 transitions. Second operand  has 7 states, 7 states have (on average 417.7142857142857) internal successors, (2924), 7 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:47,767 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:37:47,767 INFO  L93              Difference]: Finished difference Result 14240 states and 23725 transitions.
[2023-11-29 02:37:47,768 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:37:47,768 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 417.7142857142857) internal successors, (2924), 7 states have internal predecessors, (2924), 0 states have call successors, (0), 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 3137
[2023-11-29 02:37:47,770 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:37:47,777 INFO  L225             Difference]: With dead ends: 14240
[2023-11-29 02:37:47,777 INFO  L226             Difference]: Without dead ends: 9585
[2023-11-29 02:37:47,780 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3146 GetRequests, 3134 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:37:47,781 INFO  L413           NwaCegarLoop]: 8247 mSDtfsCounter, 21931 mSDsluCounter, 32437 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21931 SdHoareTripleChecker+Valid, 40684 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:37:47,781 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21931 Valid, 40684 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:37:47,788 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9585 states.
[2023-11-29 02:37:47,830 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9585 to 5119.
[2023-11-29 02:37:47,834 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5119 states, 5118 states have (on average 1.666080500195389) internal successors, (8527), 5118 states have internal predecessors, (8527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:47,839 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5119 states to 5119 states and 8527 transitions.
[2023-11-29 02:37:47,839 INFO  L78                 Accepts]: Start accepts. Automaton has 5119 states and 8527 transitions. Word has length 3137
[2023-11-29 02:37:47,840 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:37:47,840 INFO  L495      AbstractCegarLoop]: Abstraction has 5119 states and 8527 transitions.
[2023-11-29 02:37:47,841 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 417.7142857142857) internal successors, (2924), 7 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:47,841 INFO  L276                IsEmpty]: Start isEmpty. Operand 5119 states and 8527 transitions.
[2023-11-29 02:37:47,908 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3139
[2023-11-29 02:37:47,908 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:37:47,908 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, 2, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:37:47,940 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0
[2023-11-29 02:37:48,109 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:37:48,109 INFO  L420      AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:37:48,110 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:37:48,110 INFO  L85        PathProgramCache]: Analyzing trace with hash 1974739666, now seen corresponding path program 1 times
[2023-11-29 02:37:48,111 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:37:48,111 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141992298]
[2023-11-29 02:37:48,111 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:48,111 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:37:48,307 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:37:48,307 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85924261]
[2023-11-29 02:37:48,308 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:48,308 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:37:48,308 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:37:48,309 INFO  L229       MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:37:48,310 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process
[2023-11-29 02:37:50,954 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:37:51,021 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12723 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:37:51,052 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:37:51,199 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked.
[2023-11-29 02:37:51,199 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:37:51,199 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:37:51,199 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141992298]
[2023-11-29 02:37:51,199 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:37:51,199 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85924261]
[2023-11-29 02:37:51,199 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [85924261] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:37:51,199 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:37:51,200 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:37:51,201 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114285976]
[2023-11-29 02:37:51,201 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:37:51,202 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:37:51,202 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:37:51,204 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:37:51,204 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:37:51,205 INFO  L87              Difference]: Start difference. First operand 5119 states and 8527 transitions. Second operand  has 7 states, 7 states have (on average 418.42857142857144) internal successors, (2929), 7 states have internal predecessors, (2929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:51,501 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:37:51,501 INFO  L93              Difference]: Finished difference Result 14255 states and 23746 transitions.
[2023-11-29 02:37:51,501 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:37:51,502 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 418.42857142857144) internal successors, (2929), 7 states have internal predecessors, (2929), 0 states have call successors, (0), 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 3138
[2023-11-29 02:37:51,505 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:37:51,514 INFO  L225             Difference]: With dead ends: 14255
[2023-11-29 02:37:51,514 INFO  L226             Difference]: Without dead ends: 9589
[2023-11-29 02:37:51,517 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3147 GetRequests, 3135 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:37:51,517 INFO  L413           NwaCegarLoop]: 8237 mSDtfsCounter, 21935 mSDsluCounter, 32407 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21935 SdHoareTripleChecker+Valid, 40644 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:37:51,517 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21935 Valid, 40644 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:37:51,525 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9589 states.
[2023-11-29 02:37:51,565 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9589 to 5124.
[2023-11-29 02:37:51,569 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5124 states, 5123 states have (on average 1.6658208081202421) internal successors, (8534), 5123 states have internal predecessors, (8534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:51,574 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5124 states to 5124 states and 8534 transitions.
[2023-11-29 02:37:51,575 INFO  L78                 Accepts]: Start accepts. Automaton has 5124 states and 8534 transitions. Word has length 3138
[2023-11-29 02:37:51,576 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:37:51,576 INFO  L495      AbstractCegarLoop]: Abstraction has 5124 states and 8534 transitions.
[2023-11-29 02:37:51,577 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 418.42857142857144) internal successors, (2929), 7 states have internal predecessors, (2929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:51,577 INFO  L276                IsEmpty]: Start isEmpty. Operand 5124 states and 8534 transitions.
[2023-11-29 02:37:51,618 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3140
[2023-11-29 02:37:51,619 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:37:51,619 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, 2, 2, 2, 2, 2, 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, 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[2023-11-29 02:37:51,650 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0
[2023-11-29 02:37:51,819 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:37:51,820 INFO  L420      AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:37:51,820 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:37:51,820 INFO  L85        PathProgramCache]: Analyzing trace with hash 1317258538, now seen corresponding path program 1 times
[2023-11-29 02:37:51,821 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:37:51,821 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252075103]
[2023-11-29 02:37:51,821 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:51,821 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:37:52,015 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:37:52,015 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1776866473]
[2023-11-29 02:37:52,016 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:52,016 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:37:52,016 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:37:52,017 INFO  L229       MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:37:52,019 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process
[2023-11-29 02:37:54,621 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:37:54,688 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12726 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:37:54,718 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:37:54,855 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked.
[2023-11-29 02:37:54,855 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:37:54,855 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:37:54,855 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252075103]
[2023-11-29 02:37:54,855 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:37:54,855 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776866473]
[2023-11-29 02:37:54,855 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776866473] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:37:54,855 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:37:54,856 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:37:54,856 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304582690]
[2023-11-29 02:37:54,857 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:37:54,858 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:37:54,858 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:37:54,860 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:37:54,860 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:37:54,861 INFO  L87              Difference]: Start difference. First operand 5124 states and 8534 transitions. Second operand  has 7 states, 7 states have (on average 418.85714285714283) internal successors, (2932), 7 states have internal predecessors, (2932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:55,190 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:37:55,190 INFO  L93              Difference]: Finished difference Result 14267 states and 23762 transitions.
[2023-11-29 02:37:55,190 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:37:55,191 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 418.85714285714283) internal successors, (2932), 7 states have internal predecessors, (2932), 0 states have call successors, (0), 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 3139
[2023-11-29 02:37:55,193 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:37:55,200 INFO  L225             Difference]: With dead ends: 14267
[2023-11-29 02:37:55,200 INFO  L226             Difference]: Without dead ends: 9590
[2023-11-29 02:37:55,203 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3148 GetRequests, 3136 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:37:55,203 INFO  L413           NwaCegarLoop]: 8232 mSDtfsCounter, 21936 mSDsluCounter, 32392 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21936 SdHoareTripleChecker+Valid, 40624 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:37:55,203 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21936 Valid, 40624 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:37:55,211 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9590 states.
[2023-11-29 02:37:55,250 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9590 to 5126.
[2023-11-29 02:37:55,254 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5126 states, 5125 states have (on average 1.665560975609756) internal successors, (8536), 5125 states have internal predecessors, (8536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:55,259 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5126 states to 5126 states and 8536 transitions.
[2023-11-29 02:37:55,259 INFO  L78                 Accepts]: Start accepts. Automaton has 5126 states and 8536 transitions. Word has length 3139
[2023-11-29 02:37:55,260 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:37:55,260 INFO  L495      AbstractCegarLoop]: Abstraction has 5126 states and 8536 transitions.
[2023-11-29 02:37:55,261 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 418.85714285714283) internal successors, (2932), 7 states have internal predecessors, (2932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:55,261 INFO  L276                IsEmpty]: Start isEmpty. Operand 5126 states and 8536 transitions.
[2023-11-29 02:37:55,302 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3141
[2023-11-29 02:37:55,302 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:37:55,303 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, 2, 2, 2, 2, 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, 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[2023-11-29 02:37:55,335 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0
[2023-11-29 02:37:55,503 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:37:55,504 INFO  L420      AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:37:55,504 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:37:55,504 INFO  L85        PathProgramCache]: Analyzing trace with hash 2040511352, now seen corresponding path program 1 times
[2023-11-29 02:37:55,504 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:37:55,504 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93811806]
[2023-11-29 02:37:55,505 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:55,505 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:37:55,700 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:37:55,700 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1911963581]
[2023-11-29 02:37:55,701 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:55,701 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:37:55,701 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:37:55,702 INFO  L229       MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:37:55,703 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process
[2023-11-29 02:37:58,295 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:37:58,365 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12729 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:37:58,396 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:37:58,530 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked.
[2023-11-29 02:37:58,530 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:37:58,530 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:37:58,530 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93811806]
[2023-11-29 02:37:58,530 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:37:58,530 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911963581]
[2023-11-29 02:37:58,530 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911963581] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:37:58,531 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:37:58,532 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:37:58,532 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935572038]
[2023-11-29 02:37:58,532 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:37:58,533 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:37:58,534 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:37:58,535 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:37:58,535 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:37:58,536 INFO  L87              Difference]: Start difference. First operand 5126 states and 8536 transitions. Second operand  has 7 states, 7 states have (on average 419.57142857142856) internal successors, (2937), 7 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:58,830 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:37:58,830 INFO  L93              Difference]: Finished difference Result 14276 states and 23773 transitions.
[2023-11-29 02:37:58,831 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:37:58,832 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 419.57142857142856) internal successors, (2937), 7 states have internal predecessors, (2937), 0 states have call successors, (0), 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 3140
[2023-11-29 02:37:58,834 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:37:58,841 INFO  L225             Difference]: With dead ends: 14276
[2023-11-29 02:37:58,841 INFO  L226             Difference]: Without dead ends: 9594
[2023-11-29 02:37:58,844 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3149 GetRequests, 3137 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:37:58,845 INFO  L413           NwaCegarLoop]: 8222 mSDtfsCounter, 21938 mSDsluCounter, 32362 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21938 SdHoareTripleChecker+Valid, 40584 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:37:58,845 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21938 Valid, 40584 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:37:58,852 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9594 states.
[2023-11-29 02:37:58,896 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9594 to 5131.
[2023-11-29 02:37:58,900 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5131 states, 5130 states have (on average 1.6653021442495126) internal successors, (8543), 5130 states have internal predecessors, (8543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:58,906 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5131 states to 5131 states and 8543 transitions.
[2023-11-29 02:37:58,906 INFO  L78                 Accepts]: Start accepts. Automaton has 5131 states and 8543 transitions. Word has length 3140
[2023-11-29 02:37:58,907 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:37:58,907 INFO  L495      AbstractCegarLoop]: Abstraction has 5131 states and 8543 transitions.
[2023-11-29 02:37:58,908 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 419.57142857142856) internal successors, (2937), 7 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:37:58,908 INFO  L276                IsEmpty]: Start isEmpty. Operand 5131 states and 8543 transitions.
[2023-11-29 02:37:58,950 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3142
[2023-11-29 02:37:58,950 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:37:58,951 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, 2, 2, 2, 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, 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[2023-11-29 02:37:58,984 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0
[2023-11-29 02:37:59,151 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49
[2023-11-29 02:37:59,152 INFO  L420      AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:37:59,152 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:37:59,152 INFO  L85        PathProgramCache]: Analyzing trace with hash 1788616224, now seen corresponding path program 1 times
[2023-11-29 02:37:59,152 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:37:59,152 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697057119]
[2023-11-29 02:37:59,153 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:59,153 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:37:59,349 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:37:59,349 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087719018]
[2023-11-29 02:37:59,350 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:37:59,350 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:37:59,350 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:37:59,351 INFO  L229       MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:37:59,351 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process
[2023-11-29 02:38:02,003 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:38:02,067 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12733 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:38:02,096 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:38:02,231 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked.
[2023-11-29 02:38:02,232 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:38:02,232 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:38:02,232 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697057119]
[2023-11-29 02:38:02,232 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:38:02,232 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087719018]
[2023-11-29 02:38:02,232 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087719018] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:38:02,232 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:38:02,233 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:38:02,233 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981913174]
[2023-11-29 02:38:02,233 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:38:02,234 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:38:02,234 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:38:02,235 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:38:02,235 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:38:02,236 INFO  L87              Difference]: Start difference. First operand 5131 states and 8543 transitions. Second operand  has 7 states, 7 states have (on average 420.2857142857143) internal successors, (2942), 7 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:02,532 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:38:02,532 INFO  L93              Difference]: Finished difference Result 14291 states and 23794 transitions.
[2023-11-29 02:38:02,533 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:38:02,534 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 420.2857142857143) internal successors, (2942), 7 states have internal predecessors, (2942), 0 states have call successors, (0), 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 3141
[2023-11-29 02:38:02,536 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:38:02,543 INFO  L225             Difference]: With dead ends: 14291
[2023-11-29 02:38:02,543 INFO  L226             Difference]: Without dead ends: 9598
[2023-11-29 02:38:02,546 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3150 GetRequests, 3138 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:38:02,546 INFO  L413           NwaCegarLoop]: 8212 mSDtfsCounter, 21942 mSDsluCounter, 32332 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21942 SdHoareTripleChecker+Valid, 40544 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:38:02,547 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21942 Valid, 40544 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:38:02,554 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9598 states.
[2023-11-29 02:38:02,595 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9598 to 5136.
[2023-11-29 02:38:02,599 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5136 states, 5135 states have (on average 1.6650438169425512) internal successors, (8550), 5135 states have internal predecessors, (8550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:02,604 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5136 states to 5136 states and 8550 transitions.
[2023-11-29 02:38:02,604 INFO  L78                 Accepts]: Start accepts. Automaton has 5136 states and 8550 transitions. Word has length 3141
[2023-11-29 02:38:02,605 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:38:02,605 INFO  L495      AbstractCegarLoop]: Abstraction has 5136 states and 8550 transitions.
[2023-11-29 02:38:02,606 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 420.2857142857143) internal successors, (2942), 7 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:02,606 INFO  L276                IsEmpty]: Start isEmpty. Operand 5136 states and 8550 transitions.
[2023-11-29 02:38:02,648 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3143
[2023-11-29 02:38:02,648 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:38:02,649 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, 2, 2, 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, 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[2023-11-29 02:38:02,680 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0
[2023-11-29 02:38:02,849 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:38:02,850 INFO  L420      AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:38:02,850 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:38:02,850 INFO  L85        PathProgramCache]: Analyzing trace with hash -1324025210, now seen corresponding path program 1 times
[2023-11-29 02:38:02,850 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:38:02,850 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933733344]
[2023-11-29 02:38:02,851 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:02,851 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:38:03,046 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:38:03,046 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180565901]
[2023-11-29 02:38:03,047 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:03,047 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:38:03,047 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:38:03,048 INFO  L229       MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:38:03,048 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process
[2023-11-29 02:38:05,596 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:38:05,668 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12736 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:38:05,700 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:38:05,829 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked.
[2023-11-29 02:38:05,829 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:38:05,829 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:38:05,829 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933733344]
[2023-11-29 02:38:05,829 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:38:05,829 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180565901]
[2023-11-29 02:38:05,829 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [180565901] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:38:05,830 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:38:05,830 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:38:05,830 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97381398]
[2023-11-29 02:38:05,830 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:38:05,832 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:38:05,832 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:38:05,833 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:38:05,833 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:38:05,834 INFO  L87              Difference]: Start difference. First operand 5136 states and 8550 transitions. Second operand  has 7 states, 7 states have (on average 420.7142857142857) internal successors, (2945), 7 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:06,132 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:38:06,132 INFO  L93              Difference]: Finished difference Result 14303 states and 23810 transitions.
[2023-11-29 02:38:06,132 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:38:06,133 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 420.7142857142857) internal successors, (2945), 7 states have internal predecessors, (2945), 0 states have call successors, (0), 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 3142
[2023-11-29 02:38:06,135 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:38:06,143 INFO  L225             Difference]: With dead ends: 14303
[2023-11-29 02:38:06,144 INFO  L226             Difference]: Without dead ends: 9599
[2023-11-29 02:38:06,147 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3151 GetRequests, 3139 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:38:06,147 INFO  L413           NwaCegarLoop]: 8207 mSDtfsCounter, 21943 mSDsluCounter, 32317 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21943 SdHoareTripleChecker+Valid, 40524 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:38:06,148 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21943 Valid, 40524 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:38:06,155 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9599 states.
[2023-11-29 02:38:06,195 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9599 to 5138.
[2023-11-29 02:38:06,199 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5138 states, 5137 states have (on average 1.6647848939069496) internal successors, (8552), 5137 states have internal predecessors, (8552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:06,204 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5138 states to 5138 states and 8552 transitions.
[2023-11-29 02:38:06,205 INFO  L78                 Accepts]: Start accepts. Automaton has 5138 states and 8552 transitions. Word has length 3142
[2023-11-29 02:38:06,206 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:38:06,206 INFO  L495      AbstractCegarLoop]: Abstraction has 5138 states and 8552 transitions.
[2023-11-29 02:38:06,207 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 420.7142857142857) internal successors, (2945), 7 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:06,207 INFO  L276                IsEmpty]: Start isEmpty. Operand 5138 states and 8552 transitions.
[2023-11-29 02:38:06,248 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3144
[2023-11-29 02:38:06,249 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:38:06,249 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, 2, 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, 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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]
[2023-11-29 02:38:06,281 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0
[2023-11-29 02:38:06,449 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:38:06,450 INFO  L420      AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:38:06,450 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:38:06,450 INFO  L85        PathProgramCache]: Analyzing trace with hash -1533658374, now seen corresponding path program 1 times
[2023-11-29 02:38:06,450 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:38:06,451 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615497481]
[2023-11-29 02:38:06,451 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:06,451 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:38:06,646 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:38:06,646 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353612193]
[2023-11-29 02:38:06,647 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:06,647 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:38:06,647 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:38:06,648 INFO  L229       MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:38:06,648 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process
[2023-11-29 02:38:09,355 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:38:09,422 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12739 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:38:09,453 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:38:09,599 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked.
[2023-11-29 02:38:09,600 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:38:09,600 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:38:09,600 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615497481]
[2023-11-29 02:38:09,600 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:38:09,600 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353612193]
[2023-11-29 02:38:09,600 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [353612193] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:38:09,600 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:38:09,601 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:38:09,601 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388467287]
[2023-11-29 02:38:09,601 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:38:09,603 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:38:09,603 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:38:09,605 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:38:09,605 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:38:09,605 INFO  L87              Difference]: Start difference. First operand 5138 states and 8552 transitions. Second operand  has 7 states, 7 states have (on average 421.42857142857144) internal successors, (2950), 7 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:09,896 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:38:09,897 INFO  L93              Difference]: Finished difference Result 14312 states and 23821 transitions.
[2023-11-29 02:38:09,897 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:38:09,898 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 421.42857142857144) internal successors, (2950), 7 states have internal predecessors, (2950), 0 states have call successors, (0), 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 3143
[2023-11-29 02:38:09,899 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:38:09,906 INFO  L225             Difference]: With dead ends: 14312
[2023-11-29 02:38:09,906 INFO  L226             Difference]: Without dead ends: 9603
[2023-11-29 02:38:09,910 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3152 GetRequests, 3140 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:38:09,910 INFO  L413           NwaCegarLoop]: 8197 mSDtfsCounter, 21945 mSDsluCounter, 32287 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21945 SdHoareTripleChecker+Valid, 40484 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:38:09,910 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21945 Valid, 40484 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:38:09,917 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9603 states.
[2023-11-29 02:38:09,957 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9603 to 5143.
[2023-11-29 02:38:09,961 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5143 states, 5142 states have (on average 1.6645274212368728) internal successors, (8559), 5142 states have internal predecessors, (8559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:09,966 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5143 states to 5143 states and 8559 transitions.
[2023-11-29 02:38:09,966 INFO  L78                 Accepts]: Start accepts. Automaton has 5143 states and 8559 transitions. Word has length 3143
[2023-11-29 02:38:09,968 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:38:09,968 INFO  L495      AbstractCegarLoop]: Abstraction has 5143 states and 8559 transitions.
[2023-11-29 02:38:09,968 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 421.42857142857144) internal successors, (2950), 7 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:09,968 INFO  L276                IsEmpty]: Start isEmpty. Operand 5143 states and 8559 transitions.
[2023-11-29 02:38:10,010 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3145
[2023-11-29 02:38:10,010 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:38:10,011 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, 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, 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[2023-11-29 02:38:10,042 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0
[2023-11-29 02:38:10,211 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:38:10,211 INFO  L420      AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:38:10,212 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:38:10,212 INFO  L85        PathProgramCache]: Analyzing trace with hash 960084690, now seen corresponding path program 1 times
[2023-11-29 02:38:10,212 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:38:10,212 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228496138]
[2023-11-29 02:38:10,212 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:10,213 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:38:10,409 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:38:10,410 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1275823813]
[2023-11-29 02:38:10,410 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:10,411 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:38:10,411 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:38:10,412 INFO  L229       MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:38:10,412 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process
[2023-11-29 02:38:13,088 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:38:13,155 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12742 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-29 02:38:13,185 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:38:13,329 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked.
[2023-11-29 02:38:13,329 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:38:13,329 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:38:13,329 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228496138]
[2023-11-29 02:38:13,329 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:38:13,329 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275823813]
[2023-11-29 02:38:13,329 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275823813] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:38:13,329 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:38:13,330 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:38:13,330 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705006301]
[2023-11-29 02:38:13,330 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:38:13,332 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:38:13,332 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:38:13,333 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:38:13,333 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:38:13,334 INFO  L87              Difference]: Start difference. First operand 5143 states and 8559 transitions. Second operand  has 8 states, 8 states have (on average 369.375) internal successors, (2955), 8 states have internal predecessors, (2955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:13,683 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:38:13,683 INFO  L93              Difference]: Finished difference Result 14329 states and 23844 transitions.
[2023-11-29 02:38:13,683 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2023-11-29 02:38:13,684 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 369.375) internal successors, (2955), 8 states have internal predecessors, (2955), 0 states have call successors, (0), 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 3144
[2023-11-29 02:38:13,686 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:38:13,693 INFO  L225             Difference]: With dead ends: 14329
[2023-11-29 02:38:13,693 INFO  L226             Difference]: Without dead ends: 9609
[2023-11-29 02:38:13,697 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3154 GetRequests, 3140 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240
[2023-11-29 02:38:13,697 INFO  L413           NwaCegarLoop]: 8186 mSDtfsCounter, 21948 mSDsluCounter, 40433 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21948 SdHoareTripleChecker+Valid, 48619 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:38:13,697 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21948 Valid, 48619 Invalid, 74 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:38:13,704 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9609 states.
[2023-11-29 02:38:13,744 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9609 to 5148.
[2023-11-29 02:38:13,748 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5148 states, 5147 states have (on average 1.6642704488051292) internal successors, (8566), 5147 states have internal predecessors, (8566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:13,753 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5148 states to 5148 states and 8566 transitions.
[2023-11-29 02:38:13,753 INFO  L78                 Accepts]: Start accepts. Automaton has 5148 states and 8566 transitions. Word has length 3144
[2023-11-29 02:38:13,755 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:38:13,755 INFO  L495      AbstractCegarLoop]: Abstraction has 5148 states and 8566 transitions.
[2023-11-29 02:38:13,755 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 369.375) internal successors, (2955), 8 states have internal predecessors, (2955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:13,755 INFO  L276                IsEmpty]: Start isEmpty. Operand 5148 states and 8566 transitions.
[2023-11-29 02:38:13,826 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3146
[2023-11-29 02:38:13,826 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:38:13,827 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, 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, 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[2023-11-29 02:38:13,858 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0
[2023-11-29 02:38:14,027 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:38:14,028 INFO  L420      AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:38:14,028 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:38:14,029 INFO  L85        PathProgramCache]: Analyzing trace with hash 611107758, now seen corresponding path program 1 times
[2023-11-29 02:38:14,029 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:38:14,029 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804162033]
[2023-11-29 02:38:14,029 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:14,029 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:38:14,233 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:38:14,233 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132927645]
[2023-11-29 02:38:14,234 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:14,234 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:38:14,234 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:38:14,235 INFO  L229       MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:38:14,236 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process
[2023-11-29 02:38:16,832 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:38:16,899 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12745 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:38:16,930 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:38:17,062 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked.
[2023-11-29 02:38:17,062 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:38:17,062 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:38:17,062 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804162033]
[2023-11-29 02:38:17,063 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:38:17,063 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132927645]
[2023-11-29 02:38:17,063 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132927645] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:38:17,063 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:38:17,064 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:38:17,064 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998556296]
[2023-11-29 02:38:17,064 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:38:17,066 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:38:17,066 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:38:17,067 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:38:17,068 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:38:17,068 INFO  L87              Difference]: Start difference. First operand 5148 states and 8566 transitions. Second operand  has 7 states, 7 states have (on average 422.57142857142856) internal successors, (2958), 7 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:17,358 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:38:17,358 INFO  L93              Difference]: Finished difference Result 14339 states and 23858 transitions.
[2023-11-29 02:38:17,359 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:38:17,359 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 422.57142857142856) internal successors, (2958), 7 states have internal predecessors, (2958), 0 states have call successors, (0), 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 3145
[2023-11-29 02:38:17,361 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:38:17,368 INFO  L225             Difference]: With dead ends: 14339
[2023-11-29 02:38:17,368 INFO  L226             Difference]: Without dead ends: 9608
[2023-11-29 02:38:17,371 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3154 GetRequests, 3142 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:38:17,372 INFO  L413           NwaCegarLoop]: 8182 mSDtfsCounter, 21950 mSDsluCounter, 32242 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21950 SdHoareTripleChecker+Valid, 40424 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:38:17,372 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21950 Valid, 40424 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:38:17,379 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9608 states.
[2023-11-29 02:38:17,420 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9608 to 5150.
[2023-11-29 02:38:17,424 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5150 states, 5149 states have (on average 1.6640124295979801) internal successors, (8568), 5149 states have internal predecessors, (8568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:17,428 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5150 states to 5150 states and 8568 transitions.
[2023-11-29 02:38:17,429 INFO  L78                 Accepts]: Start accepts. Automaton has 5150 states and 8568 transitions. Word has length 3145
[2023-11-29 02:38:17,430 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:38:17,430 INFO  L495      AbstractCegarLoop]: Abstraction has 5150 states and 8568 transitions.
[2023-11-29 02:38:17,431 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 422.57142857142856) internal successors, (2958), 7 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:17,431 INFO  L276                IsEmpty]: Start isEmpty. Operand 5150 states and 8568 transitions.
[2023-11-29 02:38:17,472 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3147
[2023-11-29 02:38:17,473 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:38:17,473 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, 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, 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[2023-11-29 02:38:17,504 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0
[2023-11-29 02:38:17,673 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54
[2023-11-29 02:38:17,674 INFO  L420      AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:38:17,674 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:38:17,674 INFO  L85        PathProgramCache]: Analyzing trace with hash 279169334, now seen corresponding path program 1 times
[2023-11-29 02:38:17,674 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:38:17,674 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905809690]
[2023-11-29 02:38:17,675 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:17,675 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:38:17,870 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:38:17,871 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2004379050]
[2023-11-29 02:38:17,871 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:17,871 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:38:17,871 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:38:17,872 INFO  L229       MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:38:17,873 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process
[2023-11-29 02:38:20,598 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:38:20,673 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12749 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:38:20,705 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:38:20,841 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked.
[2023-11-29 02:38:20,841 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:38:20,841 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:38:20,841 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905809690]
[2023-11-29 02:38:20,841 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:38:20,841 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004379050]
[2023-11-29 02:38:20,842 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004379050] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:38:20,842 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:38:20,843 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:38:20,843 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092781423]
[2023-11-29 02:38:20,843 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:38:20,844 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:38:20,844 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:38:20,846 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:38:20,846 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:38:20,846 INFO  L87              Difference]: Start difference. First operand 5150 states and 8568 transitions. Second operand  has 7 states, 7 states have (on average 423.2857142857143) internal successors, (2963), 7 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:21,153 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:38:21,153 INFO  L93              Difference]: Finished difference Result 14348 states and 23869 transitions.
[2023-11-29 02:38:21,154 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:38:21,154 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 423.2857142857143) internal successors, (2963), 7 states have internal predecessors, (2963), 0 states have call successors, (0), 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 3146
[2023-11-29 02:38:21,156 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:38:21,164 INFO  L225             Difference]: With dead ends: 14348
[2023-11-29 02:38:21,164 INFO  L226             Difference]: Without dead ends: 9612
[2023-11-29 02:38:21,167 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3155 GetRequests, 3143 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:38:21,168 INFO  L413           NwaCegarLoop]: 8172 mSDtfsCounter, 21952 mSDsluCounter, 32212 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21952 SdHoareTripleChecker+Valid, 40384 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:38:21,168 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21952 Valid, 40384 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:38:21,175 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9612 states.
[2023-11-29 02:38:21,218 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9612 to 5155.
[2023-11-29 02:38:21,222 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5155 states, 5154 states have (on average 1.663756305781917) internal successors, (8575), 5154 states have internal predecessors, (8575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:21,227 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5155 states to 5155 states and 8575 transitions.
[2023-11-29 02:38:21,227 INFO  L78                 Accepts]: Start accepts. Automaton has 5155 states and 8575 transitions. Word has length 3146
[2023-11-29 02:38:21,229 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:38:21,229 INFO  L495      AbstractCegarLoop]: Abstraction has 5155 states and 8575 transitions.
[2023-11-29 02:38:21,229 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 423.2857142857143) internal successors, (2963), 7 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:21,229 INFO  L276                IsEmpty]: Start isEmpty. Operand 5155 states and 8575 transitions.
[2023-11-29 02:38:21,271 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3148
[2023-11-29 02:38:21,271 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:38:21,272 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, 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, 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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]
[2023-11-29 02:38:21,305 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0
[2023-11-29 02:38:21,472 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55
[2023-11-29 02:38:21,473 INFO  L420      AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:38:21,473 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:38:21,473 INFO  L85        PathProgramCache]: Analyzing trace with hash -1404371104, now seen corresponding path program 1 times
[2023-11-29 02:38:21,473 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:38:21,473 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535777773]
[2023-11-29 02:38:21,474 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:21,474 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:38:21,672 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:38:21,672 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1987152441]
[2023-11-29 02:38:21,673 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:21,673 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:38:21,673 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:38:21,674 INFO  L229       MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:38:21,675 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process
[2023-11-29 02:38:24,307 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:38:24,378 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12752 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:38:24,410 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:38:24,560 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked.
[2023-11-29 02:38:24,560 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:38:24,561 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:38:24,561 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535777773]
[2023-11-29 02:38:24,561 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:38:24,561 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987152441]
[2023-11-29 02:38:24,561 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987152441] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:38:24,561 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:38:24,562 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:38:24,562 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736853274]
[2023-11-29 02:38:24,562 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:38:24,564 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:38:24,564 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:38:24,565 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:38:24,565 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:38:24,566 INFO  L87              Difference]: Start difference. First operand 5155 states and 8575 transitions. Second operand  has 7 states, 7 states have (on average 424.0) internal successors, (2968), 7 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:24,864 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:38:24,865 INFO  L93              Difference]: Finished difference Result 14363 states and 23890 transitions.
[2023-11-29 02:38:24,865 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:38:24,866 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 424.0) internal successors, (2968), 7 states have internal predecessors, (2968), 0 states have call successors, (0), 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 3147
[2023-11-29 02:38:24,868 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:38:24,875 INFO  L225             Difference]: With dead ends: 14363
[2023-11-29 02:38:24,875 INFO  L226             Difference]: Without dead ends: 9616
[2023-11-29 02:38:24,878 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3156 GetRequests, 3144 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:38:24,879 INFO  L413           NwaCegarLoop]: 8162 mSDtfsCounter, 21956 mSDsluCounter, 32182 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21956 SdHoareTripleChecker+Valid, 40344 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:38:24,879 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21956 Valid, 40344 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:38:24,888 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9616 states.
[2023-11-29 02:38:24,931 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9616 to 5160.
[2023-11-29 02:38:24,935 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5160 states, 5159 states have (on average 1.6635006784260515) internal successors, (8582), 5159 states have internal predecessors, (8582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:24,940 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5160 states to 5160 states and 8582 transitions.
[2023-11-29 02:38:24,940 INFO  L78                 Accepts]: Start accepts. Automaton has 5160 states and 8582 transitions. Word has length 3147
[2023-11-29 02:38:24,942 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:38:24,942 INFO  L495      AbstractCegarLoop]: Abstraction has 5160 states and 8582 transitions.
[2023-11-29 02:38:24,942 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 424.0) internal successors, (2968), 7 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:24,942 INFO  L276                IsEmpty]: Start isEmpty. Operand 5160 states and 8582 transitions.
[2023-11-29 02:38:24,984 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3149
[2023-11-29 02:38:24,985 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:38:24,985 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, 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, 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[2023-11-29 02:38:25,018 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0
[2023-11-29 02:38:25,186 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56
[2023-11-29 02:38:25,186 INFO  L420      AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:38:25,186 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:38:25,187 INFO  L85        PathProgramCache]: Analyzing trace with hash -1481860992, now seen corresponding path program 1 times
[2023-11-29 02:38:25,187 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:38:25,187 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027581628]
[2023-11-29 02:38:25,187 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:25,187 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:38:25,405 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:38:25,405 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096607733]
[2023-11-29 02:38:25,406 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:25,406 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:38:25,406 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:38:25,407 INFO  L229       MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:38:25,408 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process
[2023-11-29 02:38:28,295 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:38:28,364 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12756 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:38:28,395 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:38:28,533 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked.
[2023-11-29 02:38:28,533 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:38:28,534 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:38:28,534 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027581628]
[2023-11-29 02:38:28,534 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:38:28,534 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096607733]
[2023-11-29 02:38:28,534 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096607733] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:38:28,534 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:38:28,535 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:38:28,535 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884481037]
[2023-11-29 02:38:28,535 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:38:28,537 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:38:28,537 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:38:28,539 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:38:28,539 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:38:28,539 INFO  L87              Difference]: Start difference. First operand 5160 states and 8582 transitions. Second operand  has 7 states, 7 states have (on average 424.42857142857144) internal successors, (2971), 7 states have internal predecessors, (2971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:28,834 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:38:28,834 INFO  L93              Difference]: Finished difference Result 14375 states and 23906 transitions.
[2023-11-29 02:38:28,834 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:38:28,835 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 424.42857142857144) internal successors, (2971), 7 states have internal predecessors, (2971), 0 states have call successors, (0), 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 3148
[2023-11-29 02:38:28,837 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:38:28,844 INFO  L225             Difference]: With dead ends: 14375
[2023-11-29 02:38:28,844 INFO  L226             Difference]: Without dead ends: 9617
[2023-11-29 02:38:28,848 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3157 GetRequests, 3145 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:38:28,848 INFO  L413           NwaCegarLoop]: 8157 mSDtfsCounter, 21957 mSDsluCounter, 32167 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21957 SdHoareTripleChecker+Valid, 40324 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:38:28,848 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21957 Valid, 40324 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:38:28,855 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9617 states.
[2023-11-29 02:38:28,897 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9617 to 5162.
[2023-11-29 02:38:28,902 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5162 states, 5161 states have (on average 1.6632435574501065) internal successors, (8584), 5161 states have internal predecessors, (8584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:28,907 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5162 states to 5162 states and 8584 transitions.
[2023-11-29 02:38:28,907 INFO  L78                 Accepts]: Start accepts. Automaton has 5162 states and 8584 transitions. Word has length 3148
[2023-11-29 02:38:28,908 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:38:28,908 INFO  L495      AbstractCegarLoop]: Abstraction has 5162 states and 8584 transitions.
[2023-11-29 02:38:28,909 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 424.42857142857144) internal successors, (2971), 7 states have internal predecessors, (2971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:28,909 INFO  L276                IsEmpty]: Start isEmpty. Operand 5162 states and 8584 transitions.
[2023-11-29 02:38:28,951 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3150
[2023-11-29 02:38:28,951 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:38:28,952 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, 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, 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[2023-11-29 02:38:28,984 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0
[2023-11-29 02:38:29,152 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57
[2023-11-29 02:38:29,153 INFO  L420      AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:38:29,153 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:38:29,153 INFO  L85        PathProgramCache]: Analyzing trace with hash -602426760, now seen corresponding path program 1 times
[2023-11-29 02:38:29,153 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:38:29,154 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322698717]
[2023-11-29 02:38:29,154 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:29,154 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:38:29,352 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:38:29,352 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317126572]
[2023-11-29 02:38:29,352 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:29,352 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:38:29,353 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:38:29,353 INFO  L229       MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:38:29,354 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process
[2023-11-29 02:38:32,031 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:38:32,111 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12759 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:38:32,143 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:38:32,282 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked.
[2023-11-29 02:38:32,282 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:38:32,283 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:38:32,283 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322698717]
[2023-11-29 02:38:32,283 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:38:32,283 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317126572]
[2023-11-29 02:38:32,283 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [317126572] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:38:32,283 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:38:32,284 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:38:32,284 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156549452]
[2023-11-29 02:38:32,284 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:38:32,285 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:38:32,285 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:38:32,286 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:38:32,286 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:38:32,287 INFO  L87              Difference]: Start difference. First operand 5162 states and 8584 transitions. Second operand  has 7 states, 7 states have (on average 425.14285714285717) internal successors, (2976), 7 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:32,583 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:38:32,583 INFO  L93              Difference]: Finished difference Result 14384 states and 23917 transitions.
[2023-11-29 02:38:32,583 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:38:32,584 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 425.14285714285717) internal successors, (2976), 7 states have internal predecessors, (2976), 0 states have call successors, (0), 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 3149
[2023-11-29 02:38:32,586 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:38:32,594 INFO  L225             Difference]: With dead ends: 14384
[2023-11-29 02:38:32,594 INFO  L226             Difference]: Without dead ends: 9621
[2023-11-29 02:38:32,597 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3158 GetRequests, 3146 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:38:32,598 INFO  L413           NwaCegarLoop]: 8147 mSDtfsCounter, 21959 mSDsluCounter, 32137 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21959 SdHoareTripleChecker+Valid, 40284 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:38:32,598 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21959 Valid, 40284 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:38:32,606 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9621 states.
[2023-11-29 02:38:32,647 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9621 to 5167.
[2023-11-29 02:38:32,651 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5167 states, 5166 states have (on average 1.6629887727448702) internal successors, (8591), 5166 states have internal predecessors, (8591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:32,656 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5167 states to 5167 states and 8591 transitions.
[2023-11-29 02:38:32,656 INFO  L78                 Accepts]: Start accepts. Automaton has 5167 states and 8591 transitions. Word has length 3149
[2023-11-29 02:38:32,658 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:38:32,658 INFO  L495      AbstractCegarLoop]: Abstraction has 5167 states and 8591 transitions.
[2023-11-29 02:38:32,658 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 425.14285714285717) internal successors, (2976), 7 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:32,658 INFO  L276                IsEmpty]: Start isEmpty. Operand 5167 states and 8591 transitions.
[2023-11-29 02:38:32,700 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3151
[2023-11-29 02:38:32,700 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:38:32,701 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, 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, 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[2023-11-29 02:38:32,733 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0
[2023-11-29 02:38:32,901 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58
[2023-11-29 02:38:32,902 INFO  L420      AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:38:32,902 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:38:32,903 INFO  L85        PathProgramCache]: Analyzing trace with hash -1019567540, now seen corresponding path program 1 times
[2023-11-29 02:38:32,903 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:38:32,903 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394324418]
[2023-11-29 02:38:32,903 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:32,904 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:38:33,098 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:38:33,098 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [510424155]
[2023-11-29 02:38:33,099 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:33,099 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:38:33,099 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:38:33,100 INFO  L229       MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:38:33,101 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process
[2023-11-29 02:38:35,838 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:38:35,911 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12762 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:38:35,943 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:38:36,083 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked.
[2023-11-29 02:38:36,083 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:38:36,083 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:38:36,084 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394324418]
[2023-11-29 02:38:36,084 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:38:36,084 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510424155]
[2023-11-29 02:38:36,084 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [510424155] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:38:36,084 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:38:36,085 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:38:36,085 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911809173]
[2023-11-29 02:38:36,085 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:38:36,087 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:38:36,087 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:38:36,088 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:38:36,089 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:38:36,089 INFO  L87              Difference]: Start difference. First operand 5167 states and 8591 transitions. Second operand  has 7 states, 7 states have (on average 425.85714285714283) internal successors, (2981), 7 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:36,393 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:38:36,393 INFO  L93              Difference]: Finished difference Result 14399 states and 23938 transitions.
[2023-11-29 02:38:36,393 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:38:36,394 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 425.85714285714283) internal successors, (2981), 7 states have internal predecessors, (2981), 0 states have call successors, (0), 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 3150
[2023-11-29 02:38:36,396 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:38:36,404 INFO  L225             Difference]: With dead ends: 14399
[2023-11-29 02:38:36,404 INFO  L226             Difference]: Without dead ends: 9625
[2023-11-29 02:38:36,408 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3159 GetRequests, 3147 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:38:36,408 INFO  L413           NwaCegarLoop]: 8137 mSDtfsCounter, 21963 mSDsluCounter, 32107 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21963 SdHoareTripleChecker+Valid, 40244 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:38:36,408 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21963 Valid, 40244 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:38:36,416 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9625 states.
[2023-11-29 02:38:36,458 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9625 to 5172.
[2023-11-29 02:38:36,462 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5172 states, 5171 states have (on average 1.662734480758074) internal successors, (8598), 5171 states have internal predecessors, (8598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:36,467 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5172 states to 5172 states and 8598 transitions.
[2023-11-29 02:38:36,467 INFO  L78                 Accepts]: Start accepts. Automaton has 5172 states and 8598 transitions. Word has length 3150
[2023-11-29 02:38:36,469 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:38:36,469 INFO  L495      AbstractCegarLoop]: Abstraction has 5172 states and 8598 transitions.
[2023-11-29 02:38:36,469 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 425.85714285714283) internal successors, (2981), 7 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:36,469 INFO  L276                IsEmpty]: Start isEmpty. Operand 5172 states and 8598 transitions.
[2023-11-29 02:38:36,511 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3152
[2023-11-29 02:38:36,511 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:38:36,512 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, 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, 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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]
[2023-11-29 02:38:36,543 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0
[2023-11-29 02:38:36,712 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59
[2023-11-29 02:38:36,713 INFO  L420      AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:38:36,713 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:38:36,713 INFO  L85        PathProgramCache]: Analyzing trace with hash -1953119828, now seen corresponding path program 1 times
[2023-11-29 02:38:36,713 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:38:36,713 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510667696]
[2023-11-29 02:38:36,714 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:36,714 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:38:36,912 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:38:36,912 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368583551]
[2023-11-29 02:38:36,913 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:36,913 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:38:36,913 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:38:36,914 INFO  L229       MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:38:36,915 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process
[2023-11-29 02:38:39,508 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:38:39,580 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12765 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-29 02:38:39,612 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:38:39,756 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked.
[2023-11-29 02:38:39,757 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:38:39,757 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:38:39,757 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510667696]
[2023-11-29 02:38:39,757 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:38:39,757 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368583551]
[2023-11-29 02:38:39,757 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [368583551] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:38:39,757 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:38:39,758 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:38:39,758 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645615012]
[2023-11-29 02:38:39,758 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:38:39,760 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:38:39,760 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:38:39,761 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:38:39,761 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:38:39,762 INFO  L87              Difference]: Start difference. First operand 5172 states and 8598 transitions. Second operand  has 8 states, 8 states have (on average 373.0) internal successors, (2984), 8 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:40,093 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:38:40,093 INFO  L93              Difference]: Finished difference Result 14411 states and 23954 transitions.
[2023-11-29 02:38:40,093 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:38:40,094 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 373.0) internal successors, (2984), 8 states have internal predecessors, (2984), 0 states have call successors, (0), 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 3151
[2023-11-29 02:38:40,096 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:38:40,103 INFO  L225             Difference]: With dead ends: 14411
[2023-11-29 02:38:40,103 INFO  L226             Difference]: Without dead ends: 9626
[2023-11-29 02:38:40,107 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3160 GetRequests, 3147 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210
[2023-11-29 02:38:40,107 INFO  L413           NwaCegarLoop]: 8132 mSDtfsCounter, 21964 mSDsluCounter, 40221 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21964 SdHoareTripleChecker+Valid, 48353 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:38:40,107 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21964 Valid, 48353 Invalid, 59 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:38:40,114 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9626 states.
[2023-11-29 02:38:40,159 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9626 to 5174.
[2023-11-29 02:38:40,163 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5174 states, 5173 states have (on average 1.6624782524647206) internal successors, (8600), 5173 states have internal predecessors, (8600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:40,169 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5174 states to 5174 states and 8600 transitions.
[2023-11-29 02:38:40,169 INFO  L78                 Accepts]: Start accepts. Automaton has 5174 states and 8600 transitions. Word has length 3151
[2023-11-29 02:38:40,170 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:38:40,170 INFO  L495      AbstractCegarLoop]: Abstraction has 5174 states and 8600 transitions.
[2023-11-29 02:38:40,171 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 373.0) internal successors, (2984), 8 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:40,171 INFO  L276                IsEmpty]: Start isEmpty. Operand 5174 states and 8600 transitions.
[2023-11-29 02:38:40,244 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3153
[2023-11-29 02:38:40,244 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:38:40,244 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, 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, 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[2023-11-29 02:38:40,277 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0
[2023-11-29 02:38:40,445 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:38:40,445 INFO  L420      AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:38:40,446 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:38:40,446 INFO  L85        PathProgramCache]: Analyzing trace with hash -1232571150, now seen corresponding path program 1 times
[2023-11-29 02:38:40,446 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:38:40,446 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541881374]
[2023-11-29 02:38:40,447 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:40,447 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:38:40,653 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:38:40,653 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087079779]
[2023-11-29 02:38:40,654 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:40,654 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:38:40,654 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:38:40,655 INFO  L229       MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:38:40,655 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process
[2023-11-29 02:38:43,296 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:38:43,375 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12768 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:38:43,410 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:38:43,548 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked.
[2023-11-29 02:38:43,548 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:38:43,548 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:38:43,548 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541881374]
[2023-11-29 02:38:43,548 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:38:43,548 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087079779]
[2023-11-29 02:38:43,548 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087079779] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:38:43,548 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:38:43,549 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:38:43,549 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476669011]
[2023-11-29 02:38:43,549 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:38:43,550 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:38:43,550 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:38:43,552 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:38:43,552 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:38:43,552 INFO  L87              Difference]: Start difference. First operand 5174 states and 8600 transitions. Second operand  has 7 states, 7 states have (on average 427.0) internal successors, (2989), 7 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:43,849 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:38:43,849 INFO  L93              Difference]: Finished difference Result 14420 states and 23965 transitions.
[2023-11-29 02:38:43,849 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:38:43,850 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 427.0) internal successors, (2989), 7 states have internal predecessors, (2989), 0 states have call successors, (0), 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 3152
[2023-11-29 02:38:43,852 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:38:43,860 INFO  L225             Difference]: With dead ends: 14420
[2023-11-29 02:38:43,860 INFO  L226             Difference]: Without dead ends: 9630
[2023-11-29 02:38:43,863 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3161 GetRequests, 3149 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:38:43,863 INFO  L413           NwaCegarLoop]: 8122 mSDtfsCounter, 21966 mSDsluCounter, 32062 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21966 SdHoareTripleChecker+Valid, 40184 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:38:43,863 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21966 Valid, 40184 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:38:43,871 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9630 states.
[2023-11-29 02:38:43,916 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9630 to 5179.
[2023-11-29 02:38:43,921 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5179 states, 5178 states have (on average 1.6622247972190034) internal successors, (8607), 5178 states have internal predecessors, (8607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:43,926 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5179 states to 5179 states and 8607 transitions.
[2023-11-29 02:38:43,926 INFO  L78                 Accepts]: Start accepts. Automaton has 5179 states and 8607 transitions. Word has length 3152
[2023-11-29 02:38:43,928 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:38:43,928 INFO  L495      AbstractCegarLoop]: Abstraction has 5179 states and 8607 transitions.
[2023-11-29 02:38:43,928 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 427.0) internal successors, (2989), 7 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:43,929 INFO  L276                IsEmpty]: Start isEmpty. Operand 5179 states and 8607 transitions.
[2023-11-29 02:38:43,971 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3154
[2023-11-29 02:38:43,972 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:38:43,972 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, 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, 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[2023-11-29 02:38:44,005 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0
[2023-11-29 02:38:44,173 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:38:44,173 INFO  L420      AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:38:44,173 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:38:44,174 INFO  L85        PathProgramCache]: Analyzing trace with hash 1267575458, now seen corresponding path program 1 times
[2023-11-29 02:38:44,174 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:38:44,174 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132624872]
[2023-11-29 02:38:44,174 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:44,174 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:38:44,377 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:38:44,377 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040723806]
[2023-11-29 02:38:44,378 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:44,378 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:38:44,378 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:38:44,379 INFO  L229       MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:38:44,380 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process
[2023-11-29 02:38:47,087 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:38:47,165 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12772 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:38:47,200 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:38:47,345 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked.
[2023-11-29 02:38:47,345 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:38:47,345 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:38:47,346 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132624872]
[2023-11-29 02:38:47,346 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:38:47,346 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040723806]
[2023-11-29 02:38:47,346 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040723806] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:38:47,346 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:38:47,347 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:38:47,347 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313461015]
[2023-11-29 02:38:47,347 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:38:47,349 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:38:47,349 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:38:47,350 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:38:47,350 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:38:47,351 INFO  L87              Difference]: Start difference. First operand 5179 states and 8607 transitions. Second operand  has 7 states, 7 states have (on average 427.7142857142857) internal successors, (2994), 7 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:47,671 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:38:47,671 INFO  L93              Difference]: Finished difference Result 14435 states and 23986 transitions.
[2023-11-29 02:38:47,672 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 02:38:47,672 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 427.7142857142857) internal successors, (2994), 7 states have internal predecessors, (2994), 0 states have call successors, (0), 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 3153
[2023-11-29 02:38:47,674 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:38:47,681 INFO  L225             Difference]: With dead ends: 14435
[2023-11-29 02:38:47,681 INFO  L226             Difference]: Without dead ends: 9634
[2023-11-29 02:38:47,685 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3162 GetRequests, 3150 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:38:47,685 INFO  L413           NwaCegarLoop]: 8112 mSDtfsCounter, 21970 mSDsluCounter, 32032 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21970 SdHoareTripleChecker+Valid, 40144 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:38:47,686 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21970 Valid, 40144 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:38:47,696 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9634 states.
[2023-11-29 02:38:47,749 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9634 to 5184.
[2023-11-29 02:38:47,754 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5184 states, 5183 states have (on average 1.6619718309859155) internal successors, (8614), 5183 states have internal predecessors, (8614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:47,760 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5184 states to 5184 states and 8614 transitions.
[2023-11-29 02:38:47,760 INFO  L78                 Accepts]: Start accepts. Automaton has 5184 states and 8614 transitions. Word has length 3153
[2023-11-29 02:38:47,761 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:38:47,762 INFO  L495      AbstractCegarLoop]: Abstraction has 5184 states and 8614 transitions.
[2023-11-29 02:38:47,762 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 427.7142857142857) internal successors, (2994), 7 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:47,762 INFO  L276                IsEmpty]: Start isEmpty. Operand 5184 states and 8614 transitions.
[2023-11-29 02:38:47,806 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3155
[2023-11-29 02:38:47,806 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:38:47,806 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, 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, 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[2023-11-29 02:38:47,840 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0
[2023-11-29 02:38:48,007 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:38:48,007 INFO  L420      AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:38:48,007 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:38:48,008 INFO  L85        PathProgramCache]: Analyzing trace with hash 713869824, now seen corresponding path program 1 times
[2023-11-29 02:38:48,008 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:38:48,008 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848231773]
[2023-11-29 02:38:48,009 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:48,009 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:38:48,216 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:38:48,216 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024164817]
[2023-11-29 02:38:48,217 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:48,217 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:38:48,217 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:38:48,218 INFO  L229       MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:38:48,219 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process
[2023-11-29 02:38:50,905 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:38:50,983 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12775 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:38:51,017 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:38:51,162 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked.
[2023-11-29 02:38:51,162 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:38:51,162 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:38:51,162 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848231773]
[2023-11-29 02:38:51,162 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:38:51,162 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024164817]
[2023-11-29 02:38:51,162 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024164817] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:38:51,162 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:38:51,163 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:38:51,164 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551391956]
[2023-11-29 02:38:51,164 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:38:51,165 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:38:51,165 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:38:51,166 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:38:51,167 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:38:51,167 INFO  L87              Difference]: Start difference. First operand 5184 states and 8614 transitions. Second operand  has 8 states, 8 states have (on average 374.625) internal successors, (2997), 8 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:51,494 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:38:51,494 INFO  L93              Difference]: Finished difference Result 14443 states and 23996 transitions.
[2023-11-29 02:38:51,495 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:38:51,496 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 374.625) internal successors, (2997), 8 states have internal predecessors, (2997), 0 states have call successors, (0), 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 3154
[2023-11-29 02:38:51,498 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:38:51,505 INFO  L225             Difference]: With dead ends: 14443
[2023-11-29 02:38:51,505 INFO  L226             Difference]: Without dead ends: 9631
[2023-11-29 02:38:51,509 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3162 GetRequests, 3150 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:38:51,509 INFO  L413           NwaCegarLoop]: 8103 mSDtfsCounter, 21966 mSDsluCounter, 39360 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21966 SdHoareTripleChecker+Valid, 47463 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:38:51,509 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21966 Valid, 47463 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:38:51,517 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9631 states.
[2023-11-29 02:38:51,564 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9631 to 5186.
[2023-11-29 02:38:51,569 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5186 states, 5185 states have (on average 1.6617164898746384) internal successors, (8616), 5185 states have internal predecessors, (8616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:51,575 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5186 states to 5186 states and 8616 transitions.
[2023-11-29 02:38:51,575 INFO  L78                 Accepts]: Start accepts. Automaton has 5186 states and 8616 transitions. Word has length 3154
[2023-11-29 02:38:51,576 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:38:51,577 INFO  L495      AbstractCegarLoop]: Abstraction has 5186 states and 8616 transitions.
[2023-11-29 02:38:51,577 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 374.625) internal successors, (2997), 8 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:51,577 INFO  L276                IsEmpty]: Start isEmpty. Operand 5186 states and 8616 transitions.
[2023-11-29 02:38:51,622 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3156
[2023-11-29 02:38:51,622 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:38:51,623 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, 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, 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[2023-11-29 02:38:51,657 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0
[2023-11-29 02:38:51,823 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:38:51,824 INFO  L420      AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:38:51,824 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:38:51,824 INFO  L85        PathProgramCache]: Analyzing trace with hash -551670404, now seen corresponding path program 1 times
[2023-11-29 02:38:51,824 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:38:51,824 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767614008]
[2023-11-29 02:38:51,825 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:51,825 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:38:52,026 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:38:52,026 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57930041]
[2023-11-29 02:38:52,027 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:52,027 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:38:52,027 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:38:52,028 INFO  L229       MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:38:52,029 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process
[2023-11-29 02:38:54,706 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:38:54,781 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12778 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:38:54,815 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:38:54,963 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked.
[2023-11-29 02:38:54,963 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:38:54,963 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:38:54,963 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767614008]
[2023-11-29 02:38:54,963 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:38:54,963 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57930041]
[2023-11-29 02:38:54,963 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [57930041] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:38:54,963 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:38:54,964 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:38:54,965 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111432111]
[2023-11-29 02:38:54,965 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:38:54,966 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:38:54,966 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:38:54,968 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:38:54,968 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:38:54,969 INFO  L87              Difference]: Start difference. First operand 5186 states and 8616 transitions. Second operand  has 7 states, 7 states have (on average 428.0) internal successors, (2996), 7 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:55,262 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:38:55,263 INFO  L93              Difference]: Finished difference Result 14447 states and 23998 transitions.
[2023-11-29 02:38:55,263 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:38:55,264 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 428.0) internal successors, (2996), 7 states have internal predecessors, (2996), 0 states have call successors, (0), 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 3155
[2023-11-29 02:38:55,266 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:38:55,273 INFO  L225             Difference]: With dead ends: 14447
[2023-11-29 02:38:55,273 INFO  L226             Difference]: Without dead ends: 9639
[2023-11-29 02:38:55,276 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3163 GetRequests, 3152 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-29 02:38:55,277 INFO  L413           NwaCegarLoop]: 8113 mSDtfsCounter, 21962 mSDsluCounter, 32033 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21962 SdHoareTripleChecker+Valid, 40146 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:38:55,277 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21962 Valid, 40146 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:38:55,285 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9639 states.
[2023-11-29 02:38:55,330 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9639 to 5186.
[2023-11-29 02:38:55,335 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5186 states, 5185 states have (on average 1.6617164898746384) internal successors, (8616), 5185 states have internal predecessors, (8616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:55,341 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5186 states to 5186 states and 8616 transitions.
[2023-11-29 02:38:55,341 INFO  L78                 Accepts]: Start accepts. Automaton has 5186 states and 8616 transitions. Word has length 3155
[2023-11-29 02:38:55,342 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:38:55,343 INFO  L495      AbstractCegarLoop]: Abstraction has 5186 states and 8616 transitions.
[2023-11-29 02:38:55,343 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 428.0) internal successors, (2996), 7 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:55,343 INFO  L276                IsEmpty]: Start isEmpty. Operand 5186 states and 8616 transitions.
[2023-11-29 02:38:55,387 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3157
[2023-11-29 02:38:55,387 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:38:55,388 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, 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, 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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]
[2023-11-29 02:38:55,422 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0
[2023-11-29 02:38:55,588 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64
[2023-11-29 02:38:55,589 INFO  L420      AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:38:55,589 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:38:55,590 INFO  L85        PathProgramCache]: Analyzing trace with hash 729699136, now seen corresponding path program 1 times
[2023-11-29 02:38:55,590 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:38:55,590 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146743304]
[2023-11-29 02:38:55,590 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:55,590 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:38:55,792 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:38:55,793 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1950404769]
[2023-11-29 02:38:55,793 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:55,793 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:38:55,794 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:38:55,794 INFO  L229       MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:38:55,795 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process
[2023-11-29 02:38:58,544 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:38:58,622 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12781 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:38:58,657 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:38:58,794 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked.
[2023-11-29 02:38:58,794 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:38:58,794 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:38:58,794 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146743304]
[2023-11-29 02:38:58,795 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:38:58,795 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950404769]
[2023-11-29 02:38:58,795 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950404769] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:38:58,795 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:38:58,796 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:38:58,796 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201165703]
[2023-11-29 02:38:58,796 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:38:58,798 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:38:58,798 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:38:58,799 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:38:58,799 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:38:58,800 INFO  L87              Difference]: Start difference. First operand 5186 states and 8616 transitions. Second operand  has 7 states, 7 states have (on average 427.85714285714283) internal successors, (2995), 7 states have internal predecessors, (2995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:59,098 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:38:59,098 INFO  L93              Difference]: Finished difference Result 14447 states and 23998 transitions.
[2023-11-29 02:38:59,098 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:38:59,099 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 427.85714285714283) internal successors, (2995), 7 states have internal predecessors, (2995), 0 states have call successors, (0), 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 3156
[2023-11-29 02:38:59,101 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:38:59,108 INFO  L225             Difference]: With dead ends: 14447
[2023-11-29 02:38:59,108 INFO  L226             Difference]: Without dead ends: 9645
[2023-11-29 02:38:59,111 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3164 GetRequests, 3153 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-29 02:38:59,112 INFO  L413           NwaCegarLoop]: 8123 mSDtfsCounter, 21958 mSDsluCounter, 32063 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21958 SdHoareTripleChecker+Valid, 40186 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:38:59,112 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21958 Valid, 40186 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:38:59,119 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9645 states.
[2023-11-29 02:38:59,160 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9645 to 5186.
[2023-11-29 02:38:59,164 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5186 states, 5185 states have (on average 1.6617164898746384) internal successors, (8616), 5185 states have internal predecessors, (8616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:59,169 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5186 states to 5186 states and 8616 transitions.
[2023-11-29 02:38:59,169 INFO  L78                 Accepts]: Start accepts. Automaton has 5186 states and 8616 transitions. Word has length 3156
[2023-11-29 02:38:59,171 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:38:59,171 INFO  L495      AbstractCegarLoop]: Abstraction has 5186 states and 8616 transitions.
[2023-11-29 02:38:59,172 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 427.85714285714283) internal successors, (2995), 7 states have internal predecessors, (2995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:38:59,172 INFO  L276                IsEmpty]: Start isEmpty. Operand 5186 states and 8616 transitions.
[2023-11-29 02:38:59,214 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3158
[2023-11-29 02:38:59,214 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:38:59,215 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, 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, 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[2023-11-29 02:38:59,249 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0
[2023-11-29 02:38:59,415 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:38:59,416 INFO  L420      AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:38:59,416 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:38:59,416 INFO  L85        PathProgramCache]: Analyzing trace with hash 536995192, now seen corresponding path program 1 times
[2023-11-29 02:38:59,416 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:38:59,416 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998809618]
[2023-11-29 02:38:59,417 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:59,417 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:38:59,651 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:38:59,651 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1564675083]
[2023-11-29 02:38:59,652 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:38:59,652 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:38:59,652 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:38:59,653 INFO  L229       MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:38:59,654 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process
[2023-11-29 02:39:02,284 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:39:02,363 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12784 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-29 02:39:02,398 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:39:02,553 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked.
[2023-11-29 02:39:02,554 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:39:02,554 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:39:02,554 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998809618]
[2023-11-29 02:39:02,554 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:39:02,554 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564675083]
[2023-11-29 02:39:02,554 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564675083] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:39:02,554 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:39:02,555 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:39:02,555 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904315861]
[2023-11-29 02:39:02,555 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:39:02,557 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:39:02,557 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:39:02,558 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:39:02,558 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:39:02,559 INFO  L87              Difference]: Start difference. First operand 5186 states and 8616 transitions. Second operand  has 8 states, 8 states have (on average 374.125) internal successors, (2993), 8 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:02,892 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:39:02,893 INFO  L93              Difference]: Finished difference Result 14447 states and 23998 transitions.
[2023-11-29 02:39:02,893 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:39:02,894 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 374.125) internal successors, (2993), 8 states have internal predecessors, (2993), 0 states have call successors, (0), 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 3157
[2023-11-29 02:39:02,896 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:39:02,903 INFO  L225             Difference]: With dead ends: 14447
[2023-11-29 02:39:02,903 INFO  L226             Difference]: Without dead ends: 9654
[2023-11-29 02:39:02,907 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3165 GetRequests, 3153 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:39:02,907 INFO  L413           NwaCegarLoop]: 8138 mSDtfsCounter, 21955 mSDsluCounter, 40237 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21955 SdHoareTripleChecker+Valid, 48375 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:39:02,907 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21955 Valid, 48375 Invalid, 63 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:39:02,915 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9654 states.
[2023-11-29 02:39:02,962 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9654 to 5186.
[2023-11-29 02:39:02,966 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5186 states, 5185 states have (on average 1.6617164898746384) internal successors, (8616), 5185 states have internal predecessors, (8616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:02,973 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5186 states to 5186 states and 8616 transitions.
[2023-11-29 02:39:02,973 INFO  L78                 Accepts]: Start accepts. Automaton has 5186 states and 8616 transitions. Word has length 3157
[2023-11-29 02:39:02,974 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:39:02,974 INFO  L495      AbstractCegarLoop]: Abstraction has 5186 states and 8616 transitions.
[2023-11-29 02:39:02,975 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 374.125) internal successors, (2993), 8 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:02,975 INFO  L276                IsEmpty]: Start isEmpty. Operand 5186 states and 8616 transitions.
[2023-11-29 02:39:03,020 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3159
[2023-11-29 02:39:03,020 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:39:03,021 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, 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, 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[2023-11-29 02:39:03,055 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0
[2023-11-29 02:39:03,221 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:39:03,221 INFO  L420      AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:39:03,221 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:39:03,222 INFO  L85        PathProgramCache]: Analyzing trace with hash 974344936, now seen corresponding path program 1 times
[2023-11-29 02:39:03,222 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:39:03,222 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231160419]
[2023-11-29 02:39:03,222 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:39:03,222 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:39:03,425 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:39:03,425 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [406653513]
[2023-11-29 02:39:03,425 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:39:03,426 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:39:03,426 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:39:03,426 INFO  L229       MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:39:03,427 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process
[2023-11-29 02:39:06,058 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:39:06,136 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12788 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:39:06,172 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:39:06,312 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked.
[2023-11-29 02:39:06,313 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:39:06,313 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:39:06,313 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231160419]
[2023-11-29 02:39:06,313 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:39:06,313 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406653513]
[2023-11-29 02:39:06,313 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [406653513] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:39:06,313 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:39:06,314 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:39:06,314 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578814713]
[2023-11-29 02:39:06,314 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:39:06,316 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:39:06,316 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:39:06,318 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:39:06,319 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:39:06,319 INFO  L87              Difference]: Start difference. First operand 5186 states and 8616 transitions. Second operand  has 7 states, 7 states have (on average 427.42857142857144) internal successors, (2992), 7 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:06,652 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:39:06,652 INFO  L93              Difference]: Finished difference Result 14447 states and 23998 transitions.
[2023-11-29 02:39:06,652 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:39:06,653 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 427.42857142857144) internal successors, (2992), 7 states have internal predecessors, (2992), 0 states have call successors, (0), 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 3158
[2023-11-29 02:39:06,655 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:39:06,662 INFO  L225             Difference]: With dead ends: 14447
[2023-11-29 02:39:06,662 INFO  L226             Difference]: Without dead ends: 9660
[2023-11-29 02:39:06,665 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3166 GetRequests, 3155 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-29 02:39:06,666 INFO  L413           NwaCegarLoop]: 8148 mSDtfsCounter, 21951 mSDsluCounter, 32138 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21951 SdHoareTripleChecker+Valid, 40286 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:39:06,666 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21951 Valid, 40286 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:39:06,673 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9660 states.
[2023-11-29 02:39:06,755 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9660 to 5186.
[2023-11-29 02:39:06,759 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5186 states, 5185 states have (on average 1.6617164898746384) internal successors, (8616), 5185 states have internal predecessors, (8616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:06,764 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5186 states to 5186 states and 8616 transitions.
[2023-11-29 02:39:06,765 INFO  L78                 Accepts]: Start accepts. Automaton has 5186 states and 8616 transitions. Word has length 3158
[2023-11-29 02:39:06,766 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:39:06,766 INFO  L495      AbstractCegarLoop]: Abstraction has 5186 states and 8616 transitions.
[2023-11-29 02:39:06,767 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 427.42857142857144) internal successors, (2992), 7 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:06,767 INFO  L276                IsEmpty]: Start isEmpty. Operand 5186 states and 8616 transitions.
[2023-11-29 02:39:06,810 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3160
[2023-11-29 02:39:06,810 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:39:06,810 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, 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, 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[2023-11-29 02:39:06,844 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0
[2023-11-29 02:39:07,011 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:39:07,011 INFO  L420      AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:39:07,011 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:39:07,012 INFO  L85        PathProgramCache]: Analyzing trace with hash 1920803638, now seen corresponding path program 1 times
[2023-11-29 02:39:07,012 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:39:07,012 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123768210]
[2023-11-29 02:39:07,013 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:39:07,013 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:39:07,220 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:39:07,220 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579282220]
[2023-11-29 02:39:07,221 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:39:07,222 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:39:07,222 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:39:07,222 INFO  L229       MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:39:07,223 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process
[2023-11-29 02:39:09,851 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:39:09,933 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12791 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:39:09,977 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:39:10,143 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked.
[2023-11-29 02:39:10,143 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:39:10,144 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:39:10,144 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123768210]
[2023-11-29 02:39:10,144 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:39:10,144 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579282220]
[2023-11-29 02:39:10,144 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579282220] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:39:10,144 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:39:10,145 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:39:10,145 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468950912]
[2023-11-29 02:39:10,145 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:39:10,147 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:39:10,147 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:39:10,148 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:39:10,148 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:39:10,149 INFO  L87              Difference]: Start difference. First operand 5186 states and 8616 transitions. Second operand  has 8 states, 8 states have (on average 373.75) internal successors, (2990), 8 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:10,472 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:39:10,472 INFO  L93              Difference]: Finished difference Result 14447 states and 23998 transitions.
[2023-11-29 02:39:10,472 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:39:10,473 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 373.75) internal successors, (2990), 8 states have internal predecessors, (2990), 0 states have call successors, (0), 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 3159
[2023-11-29 02:39:10,475 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:39:10,482 INFO  L225             Difference]: With dead ends: 14447
[2023-11-29 02:39:10,482 INFO  L226             Difference]: Without dead ends: 9669
[2023-11-29 02:39:10,486 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3167 GetRequests, 3155 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:39:10,486 INFO  L413           NwaCegarLoop]: 8163 mSDtfsCounter, 21948 mSDsluCounter, 39561 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21948 SdHoareTripleChecker+Valid, 47724 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:39:10,486 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21948 Valid, 47724 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:39:10,496 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9669 states.
[2023-11-29 02:39:10,551 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9669 to 5186.
[2023-11-29 02:39:10,555 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5186 states, 5185 states have (on average 1.6617164898746384) internal successors, (8616), 5185 states have internal predecessors, (8616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:10,561 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5186 states to 5186 states and 8616 transitions.
[2023-11-29 02:39:10,561 INFO  L78                 Accepts]: Start accepts. Automaton has 5186 states and 8616 transitions. Word has length 3159
[2023-11-29 02:39:10,562 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:39:10,562 INFO  L495      AbstractCegarLoop]: Abstraction has 5186 states and 8616 transitions.
[2023-11-29 02:39:10,563 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 373.75) internal successors, (2990), 8 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:10,563 INFO  L276                IsEmpty]: Start isEmpty. Operand 5186 states and 8616 transitions.
[2023-11-29 02:39:10,606 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3161
[2023-11-29 02:39:10,606 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:39:10,607 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, 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, 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[2023-11-29 02:39:10,640 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0
[2023-11-29 02:39:10,807 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68
[2023-11-29 02:39:10,807 INFO  L420      AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:39:10,807 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:39:10,808 INFO  L85        PathProgramCache]: Analyzing trace with hash 336415110, now seen corresponding path program 1 times
[2023-11-29 02:39:10,808 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:39:10,808 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344394762]
[2023-11-29 02:39:10,808 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:39:10,808 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:39:11,014 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:39:11,014 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1652721787]
[2023-11-29 02:39:11,014 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:39:11,014 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:39:11,015 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:39:11,015 INFO  L229       MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:39:11,016 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process
[2023-11-29 02:39:13,747 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:39:13,825 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12794 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:39:13,860 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:39:14,059 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked.
[2023-11-29 02:39:14,059 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:39:14,059 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:39:14,059 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344394762]
[2023-11-29 02:39:14,059 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:39:14,059 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652721787]
[2023-11-29 02:39:14,059 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652721787] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:39:14,059 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:39:14,060 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:39:14,061 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301156699]
[2023-11-29 02:39:14,061 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:39:14,063 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:39:14,063 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:39:14,065 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:39:14,065 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:39:14,065 INFO  L87              Difference]: Start difference. First operand 5186 states and 8616 transitions. Second operand  has 7 states, 7 states have (on average 427.0) internal successors, (2989), 7 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:14,359 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:39:14,359 INFO  L93              Difference]: Finished difference Result 14447 states and 23998 transitions.
[2023-11-29 02:39:14,360 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:39:14,361 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 427.0) internal successors, (2989), 7 states have internal predecessors, (2989), 0 states have call successors, (0), 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 3160
[2023-11-29 02:39:14,362 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:39:14,370 INFO  L225             Difference]: With dead ends: 14447
[2023-11-29 02:39:14,370 INFO  L226             Difference]: Without dead ends: 9675
[2023-11-29 02:39:14,374 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3168 GetRequests, 3157 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-29 02:39:14,374 INFO  L413           NwaCegarLoop]: 8173 mSDtfsCounter, 21944 mSDsluCounter, 32213 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21944 SdHoareTripleChecker+Valid, 40386 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:39:14,374 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21944 Valid, 40386 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:39:14,382 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9675 states.
[2023-11-29 02:39:14,430 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9675 to 5186.
[2023-11-29 02:39:14,435 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5186 states, 5185 states have (on average 1.6617164898746384) internal successors, (8616), 5185 states have internal predecessors, (8616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:14,441 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5186 states to 5186 states and 8616 transitions.
[2023-11-29 02:39:14,441 INFO  L78                 Accepts]: Start accepts. Automaton has 5186 states and 8616 transitions. Word has length 3160
[2023-11-29 02:39:14,442 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:39:14,442 INFO  L495      AbstractCegarLoop]: Abstraction has 5186 states and 8616 transitions.
[2023-11-29 02:39:14,443 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 427.0) internal successors, (2989), 7 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:14,443 INFO  L276                IsEmpty]: Start isEmpty. Operand 5186 states and 8616 transitions.
[2023-11-29 02:39:14,488 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3162
[2023-11-29 02:39:14,488 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:39:14,489 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, 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, 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[2023-11-29 02:39:14,522 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0
[2023-11-29 02:39:14,689 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:39:14,689 INFO  L420      AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:39:14,689 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:39:14,690 INFO  L85        PathProgramCache]: Analyzing trace with hash -1402401930, now seen corresponding path program 1 times
[2023-11-29 02:39:14,690 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:39:14,690 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332975284]
[2023-11-29 02:39:14,691 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:39:14,691 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:39:14,894 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:39:14,894 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101876995]
[2023-11-29 02:39:14,895 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:39:14,895 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:39:14,895 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:39:14,896 INFO  L229       MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:39:14,897 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process
[2023-11-29 02:39:17,526 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:39:17,605 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12797 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-29 02:39:17,641 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:39:17,795 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked.
[2023-11-29 02:39:17,795 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:39:17,795 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:39:17,795 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332975284]
[2023-11-29 02:39:17,795 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:39:17,796 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101876995]
[2023-11-29 02:39:17,796 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101876995] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:39:17,796 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:39:17,797 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:39:17,797 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955933659]
[2023-11-29 02:39:17,797 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:39:17,799 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:39:17,799 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:39:17,800 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:39:17,801 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:39:17,801 INFO  L87              Difference]: Start difference. First operand 5186 states and 8616 transitions. Second operand  has 8 states, 8 states have (on average 373.375) internal successors, (2987), 8 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:18,133 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:39:18,133 INFO  L93              Difference]: Finished difference Result 14447 states and 23998 transitions.
[2023-11-29 02:39:18,133 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:39:18,134 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 373.375) internal successors, (2987), 8 states have internal predecessors, (2987), 0 states have call successors, (0), 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 3161
[2023-11-29 02:39:18,136 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:39:18,143 INFO  L225             Difference]: With dead ends: 14447
[2023-11-29 02:39:18,143 INFO  L226             Difference]: Without dead ends: 9684
[2023-11-29 02:39:18,147 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3169 GetRequests, 3157 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:39:18,147 INFO  L413           NwaCegarLoop]: 8188 mSDtfsCounter, 21941 mSDsluCounter, 39645 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21941 SdHoareTripleChecker+Valid, 47833 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:39:18,147 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21941 Valid, 47833 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:39:18,155 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9684 states.
[2023-11-29 02:39:18,203 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9684 to 5186.
[2023-11-29 02:39:18,208 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5186 states, 5185 states have (on average 1.6617164898746384) internal successors, (8616), 5185 states have internal predecessors, (8616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:18,214 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5186 states to 5186 states and 8616 transitions.
[2023-11-29 02:39:18,214 INFO  L78                 Accepts]: Start accepts. Automaton has 5186 states and 8616 transitions. Word has length 3161
[2023-11-29 02:39:18,216 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:39:18,216 INFO  L495      AbstractCegarLoop]: Abstraction has 5186 states and 8616 transitions.
[2023-11-29 02:39:18,217 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 373.375) internal successors, (2987), 8 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:18,217 INFO  L276                IsEmpty]: Start isEmpty. Operand 5186 states and 8616 transitions.
[2023-11-29 02:39:18,261 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3163
[2023-11-29 02:39:18,261 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:39:18,262 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, 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, 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[2023-11-29 02:39:18,296 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0
[2023-11-29 02:39:18,462 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:39:18,463 INFO  L420      AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:39:18,463 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:39:18,463 INFO  L85        PathProgramCache]: Analyzing trace with hash 1711460336, now seen corresponding path program 1 times
[2023-11-29 02:39:18,464 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:39:18,464 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175362601]
[2023-11-29 02:39:18,464 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:39:18,464 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:39:18,672 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:39:18,672 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [158036774]
[2023-11-29 02:39:18,673 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:39:18,673 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:39:18,673 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:39:18,674 INFO  L229       MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:39:18,675 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process
[2023-11-29 02:39:21,432 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:39:21,511 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12800 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:39:21,547 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:39:21,698 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked.
[2023-11-29 02:39:21,698 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:39:21,699 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:39:21,699 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175362601]
[2023-11-29 02:39:21,699 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:39:21,699 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158036774]
[2023-11-29 02:39:21,699 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [158036774] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:39:21,699 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:39:21,700 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:39:21,700 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61803910]
[2023-11-29 02:39:21,700 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:39:21,702 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:39:21,702 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:39:21,704 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:39:21,704 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:39:21,704 INFO  L87              Difference]: Start difference. First operand 5186 states and 8616 transitions. Second operand  has 7 states, 7 states have (on average 426.57142857142856) internal successors, (2986), 7 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:22,012 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:39:22,012 INFO  L93              Difference]: Finished difference Result 14447 states and 23998 transitions.
[2023-11-29 02:39:22,012 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:39:22,013 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 426.57142857142856) internal successors, (2986), 7 states have internal predecessors, (2986), 0 states have call successors, (0), 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 3162
[2023-11-29 02:39:22,015 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:39:22,024 INFO  L225             Difference]: With dead ends: 14447
[2023-11-29 02:39:22,024 INFO  L226             Difference]: Without dead ends: 9690
[2023-11-29 02:39:22,028 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3170 GetRequests, 3159 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-29 02:39:22,029 INFO  L413           NwaCegarLoop]: 8198 mSDtfsCounter, 21937 mSDsluCounter, 32288 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21937 SdHoareTripleChecker+Valid, 40486 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:39:22,029 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21937 Valid, 40486 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:39:22,039 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9690 states.
[2023-11-29 02:39:22,085 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9690 to 5186.
[2023-11-29 02:39:22,090 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5186 states, 5185 states have (on average 1.6617164898746384) internal successors, (8616), 5185 states have internal predecessors, (8616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:22,096 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5186 states to 5186 states and 8616 transitions.
[2023-11-29 02:39:22,096 INFO  L78                 Accepts]: Start accepts. Automaton has 5186 states and 8616 transitions. Word has length 3162
[2023-11-29 02:39:22,098 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:39:22,098 INFO  L495      AbstractCegarLoop]: Abstraction has 5186 states and 8616 transitions.
[2023-11-29 02:39:22,098 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 426.57142857142856) internal successors, (2986), 7 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:22,098 INFO  L276                IsEmpty]: Start isEmpty. Operand 5186 states and 8616 transitions.
[2023-11-29 02:39:22,143 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3164
[2023-11-29 02:39:22,143 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:39:22,144 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, 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, 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[2023-11-29 02:39:22,177 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0
[2023-11-29 02:39:22,344 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:39:22,344 INFO  L420      AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:39:22,345 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:39:22,345 INFO  L85        PathProgramCache]: Analyzing trace with hash -1794141516, now seen corresponding path program 1 times
[2023-11-29 02:39:22,345 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:39:22,345 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505009540]
[2023-11-29 02:39:22,346 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:39:22,346 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:39:22,549 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:39:22,549 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284540277]
[2023-11-29 02:39:22,550 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:39:22,550 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:39:22,550 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:39:22,551 INFO  L229       MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:39:22,551 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process
[2023-11-29 02:39:25,155 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:39:25,233 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12804 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:39:25,268 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:39:25,403 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked.
[2023-11-29 02:39:25,404 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:39:25,404 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:39:25,404 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505009540]
[2023-11-29 02:39:25,404 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:39:25,404 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284540277]
[2023-11-29 02:39:25,404 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [284540277] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:39:25,404 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:39:25,405 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:39:25,405 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22306718]
[2023-11-29 02:39:25,405 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:39:25,407 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:39:25,407 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:39:25,409 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:39:25,409 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:39:25,409 INFO  L87              Difference]: Start difference. First operand 5186 states and 8616 transitions. Second operand  has 7 states, 7 states have (on average 426.2857142857143) internal successors, (2984), 7 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:25,721 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:39:25,721 INFO  L93              Difference]: Finished difference Result 14447 states and 23998 transitions.
[2023-11-29 02:39:25,722 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:39:25,723 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 426.2857142857143) internal successors, (2984), 7 states have internal predecessors, (2984), 0 states have call successors, (0), 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 3163
[2023-11-29 02:39:25,725 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:39:25,733 INFO  L225             Difference]: With dead ends: 14447
[2023-11-29 02:39:25,733 INFO  L226             Difference]: Without dead ends: 9699
[2023-11-29 02:39:25,737 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3171 GetRequests, 3160 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-29 02:39:25,737 INFO  L413           NwaCegarLoop]: 8213 mSDtfsCounter, 21934 mSDsluCounter, 32333 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21934 SdHoareTripleChecker+Valid, 40546 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:39:25,737 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21934 Valid, 40546 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:39:25,745 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9699 states.
[2023-11-29 02:39:25,792 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9699 to 5186.
[2023-11-29 02:39:25,796 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5186 states, 5185 states have (on average 1.6617164898746384) internal successors, (8616), 5185 states have internal predecessors, (8616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:25,802 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5186 states to 5186 states and 8616 transitions.
[2023-11-29 02:39:25,802 INFO  L78                 Accepts]: Start accepts. Automaton has 5186 states and 8616 transitions. Word has length 3163
[2023-11-29 02:39:25,803 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:39:25,803 INFO  L495      AbstractCegarLoop]: Abstraction has 5186 states and 8616 transitions.
[2023-11-29 02:39:25,804 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 426.2857142857143) internal successors, (2984), 7 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:25,804 INFO  L276                IsEmpty]: Start isEmpty. Operand 5186 states and 8616 transitions.
[2023-11-29 02:39:25,873 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3165
[2023-11-29 02:39:25,873 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:39:25,874 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, 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, 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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]
[2023-11-29 02:39:25,907 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0
[2023-11-29 02:39:26,074 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72
[2023-11-29 02:39:26,074 INFO  L420      AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:39:26,075 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:39:26,076 INFO  L85        PathProgramCache]: Analyzing trace with hash 1573462604, now seen corresponding path program 1 times
[2023-11-29 02:39:26,076 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:39:26,076 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063493468]
[2023-11-29 02:39:26,076 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:39:26,076 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:39:26,278 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:39:26,278 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [717768557]
[2023-11-29 02:39:26,279 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:39:26,279 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:39:26,279 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:39:26,280 INFO  L229       MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:39:26,280 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process
[2023-11-29 02:39:28,878 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:39:28,954 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12807 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:39:28,989 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:39:29,142 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked.
[2023-11-29 02:39:29,142 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:39:29,142 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:39:29,143 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063493468]
[2023-11-29 02:39:29,143 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:39:29,143 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717768557]
[2023-11-29 02:39:29,143 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [717768557] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:39:29,143 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:39:29,144 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:39:29,144 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848076232]
[2023-11-29 02:39:29,144 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:39:29,146 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:39:29,146 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:39:29,147 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:39:29,148 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:39:29,148 INFO  L87              Difference]: Start difference. First operand 5186 states and 8616 transitions. Second operand  has 8 states, 8 states have (on average 372.875) internal successors, (2983), 8 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:29,468 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:39:29,468 INFO  L93              Difference]: Finished difference Result 14447 states and 23998 transitions.
[2023-11-29 02:39:29,468 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:39:29,469 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 372.875) internal successors, (2983), 8 states have internal predecessors, (2983), 0 states have call successors, (0), 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 3164
[2023-11-29 02:39:29,471 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:39:29,478 INFO  L225             Difference]: With dead ends: 14447
[2023-11-29 02:39:29,478 INFO  L226             Difference]: Without dead ends: 9705
[2023-11-29 02:39:29,481 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3172 GetRequests, 3160 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:39:29,482 INFO  L413           NwaCegarLoop]: 8223 mSDtfsCounter, 21930 mSDsluCounter, 39762 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21930 SdHoareTripleChecker+Valid, 47985 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:39:29,482 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21930 Valid, 47985 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:39:29,490 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9705 states.
[2023-11-29 02:39:29,536 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9705 to 5186.
[2023-11-29 02:39:29,541 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5186 states, 5185 states have (on average 1.6617164898746384) internal successors, (8616), 5185 states have internal predecessors, (8616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:29,546 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5186 states to 5186 states and 8616 transitions.
[2023-11-29 02:39:29,547 INFO  L78                 Accepts]: Start accepts. Automaton has 5186 states and 8616 transitions. Word has length 3164
[2023-11-29 02:39:29,548 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:39:29,548 INFO  L495      AbstractCegarLoop]: Abstraction has 5186 states and 8616 transitions.
[2023-11-29 02:39:29,549 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 372.875) internal successors, (2983), 8 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:29,549 INFO  L276                IsEmpty]: Start isEmpty. Operand 5186 states and 8616 transitions.
[2023-11-29 02:39:29,593 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3166
[2023-11-29 02:39:29,593 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:39:29,593 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, 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, 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[2023-11-29 02:39:29,627 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0
[2023-11-29 02:39:29,794 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:39:29,794 INFO  L420      AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:39:29,794 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:39:29,795 INFO  L85        PathProgramCache]: Analyzing trace with hash 888867632, now seen corresponding path program 1 times
[2023-11-29 02:39:29,795 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:39:29,795 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461094768]
[2023-11-29 02:39:29,796 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:39:29,796 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:39:29,998 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:39:29,998 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055418639]
[2023-11-29 02:39:29,999 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:39:29,999 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:39:29,999 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:39:29,999 INFO  L229       MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:39:30,000 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process
[2023-11-29 02:39:32,787 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:39:32,864 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12810 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:39:32,899 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:39:33,048 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked.
[2023-11-29 02:39:33,049 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:39:33,049 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:39:33,049 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461094768]
[2023-11-29 02:39:33,049 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:39:33,049 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055418639]
[2023-11-29 02:39:33,049 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055418639] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:39:33,049 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:39:33,050 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:39:33,050 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461631826]
[2023-11-29 02:39:33,050 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:39:33,052 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:39:33,052 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:39:33,054 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:39:33,054 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:39:33,054 INFO  L87              Difference]: Start difference. First operand 5186 states and 8616 transitions. Second operand  has 8 states, 8 states have (on average 372.625) internal successors, (2981), 8 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:33,430 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:39:33,430 INFO  L93              Difference]: Finished difference Result 14447 states and 23998 transitions.
[2023-11-29 02:39:33,431 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:39:33,431 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 372.625) internal successors, (2981), 8 states have internal predecessors, (2981), 0 states have call successors, (0), 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 3165
[2023-11-29 02:39:33,433 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:39:33,440 INFO  L225             Difference]: With dead ends: 14447
[2023-11-29 02:39:33,440 INFO  L226             Difference]: Without dead ends: 9714
[2023-11-29 02:39:33,443 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3173 GetRequests, 3161 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:39:33,443 INFO  L413           NwaCegarLoop]: 8238 mSDtfsCounter, 21927 mSDsluCounter, 40637 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21927 SdHoareTripleChecker+Valid, 48875 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:39:33,443 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21927 Valid, 48875 Invalid, 63 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:39:33,451 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9714 states.
[2023-11-29 02:39:33,496 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9714 to 5186.
[2023-11-29 02:39:33,501 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5186 states, 5185 states have (on average 1.6617164898746384) internal successors, (8616), 5185 states have internal predecessors, (8616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:33,507 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5186 states to 5186 states and 8616 transitions.
[2023-11-29 02:39:33,507 INFO  L78                 Accepts]: Start accepts. Automaton has 5186 states and 8616 transitions. Word has length 3165
[2023-11-29 02:39:33,508 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:39:33,509 INFO  L495      AbstractCegarLoop]: Abstraction has 5186 states and 8616 transitions.
[2023-11-29 02:39:33,509 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 372.625) internal successors, (2981), 8 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:33,509 INFO  L276                IsEmpty]: Start isEmpty. Operand 5186 states and 8616 transitions.
[2023-11-29 02:39:33,554 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3167
[2023-11-29 02:39:33,554 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:39:33,555 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, 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, 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[2023-11-29 02:39:33,589 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0
[2023-11-29 02:39:33,755 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74
[2023-11-29 02:39:33,755 INFO  L420      AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:39:33,756 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:39:33,756 INFO  L85        PathProgramCache]: Analyzing trace with hash -1945470092, now seen corresponding path program 1 times
[2023-11-29 02:39:33,756 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:39:33,756 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690838360]
[2023-11-29 02:39:33,757 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:39:33,757 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:39:33,957 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:39:33,957 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675992876]
[2023-11-29 02:39:33,958 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:39:33,958 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:39:33,958 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:39:33,959 INFO  L229       MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:39:33,959 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process
[2023-11-29 02:39:36,583 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:39:36,662 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12814 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:39:36,698 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:39:36,846 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked.
[2023-11-29 02:39:36,846 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:39:36,846 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:39:36,846 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690838360]
[2023-11-29 02:39:36,846 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:39:36,846 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675992876]
[2023-11-29 02:39:36,846 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675992876] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:39:36,846 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:39:36,847 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:39:36,848 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266764974]
[2023-11-29 02:39:36,848 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:39:36,849 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:39:36,849 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:39:36,851 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:39:36,851 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:39:36,852 INFO  L87              Difference]: Start difference. First operand 5186 states and 8616 transitions. Second operand  has 8 states, 8 states have (on average 372.5) internal successors, (2980), 8 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:37,194 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:39:37,194 INFO  L93              Difference]: Finished difference Result 14447 states and 23998 transitions.
[2023-11-29 02:39:37,195 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:39:37,195 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 372.5) internal successors, (2980), 8 states have internal predecessors, (2980), 0 states have call successors, (0), 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 3166
[2023-11-29 02:39:37,198 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:39:37,206 INFO  L225             Difference]: With dead ends: 14447
[2023-11-29 02:39:37,206 INFO  L226             Difference]: Without dead ends: 9720
[2023-11-29 02:39:37,209 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3174 GetRequests, 3162 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:39:37,209 INFO  L413           NwaCegarLoop]: 8248 mSDtfsCounter, 21923 mSDsluCounter, 40677 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21923 SdHoareTripleChecker+Valid, 48925 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:39:37,210 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21923 Valid, 48925 Invalid, 63 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:39:37,217 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9720 states.
[2023-11-29 02:39:37,265 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9720 to 5186.
[2023-11-29 02:39:37,270 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5186 states, 5185 states have (on average 1.6617164898746384) internal successors, (8616), 5185 states have internal predecessors, (8616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:37,276 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5186 states to 5186 states and 8616 transitions.
[2023-11-29 02:39:37,276 INFO  L78                 Accepts]: Start accepts. Automaton has 5186 states and 8616 transitions. Word has length 3166
[2023-11-29 02:39:37,278 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:39:37,278 INFO  L495      AbstractCegarLoop]: Abstraction has 5186 states and 8616 transitions.
[2023-11-29 02:39:37,278 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 372.5) internal successors, (2980), 8 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:37,279 INFO  L276                IsEmpty]: Start isEmpty. Operand 5186 states and 8616 transitions.
[2023-11-29 02:39:37,324 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3168
[2023-11-29 02:39:37,324 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:39:37,324 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, 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, 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[2023-11-29 02:39:37,359 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0
[2023-11-29 02:39:37,525 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:39:37,525 INFO  L420      AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:39:37,525 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:39:37,526 INFO  L85        PathProgramCache]: Analyzing trace with hash -1660164498, now seen corresponding path program 1 times
[2023-11-29 02:39:37,526 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:39:37,526 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829279504]
[2023-11-29 02:39:37,527 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:39:37,527 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:39:37,737 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:39:37,737 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222192771]
[2023-11-29 02:39:37,738 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:39:37,738 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:39:37,738 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:39:37,739 INFO  L229       MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:39:37,739 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process
[2023-11-29 02:39:40,574 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:39:40,649 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12817 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:39:40,683 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:39:40,830 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked.
[2023-11-29 02:39:40,830 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:39:40,830 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:39:40,830 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829279504]
[2023-11-29 02:39:40,830 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:39:40,830 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222192771]
[2023-11-29 02:39:40,831 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222192771] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:39:40,831 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:39:40,832 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:39:40,832 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911523819]
[2023-11-29 02:39:40,832 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:39:40,833 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:39:40,833 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:39:40,834 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:39:40,835 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:39:40,835 INFO  L87              Difference]: Start difference. First operand 5186 states and 8616 transitions. Second operand  has 8 states, 8 states have (on average 372.25) internal successors, (2978), 8 states have internal predecessors, (2978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:41,167 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:39:41,167 INFO  L93              Difference]: Finished difference Result 14447 states and 23998 transitions.
[2023-11-29 02:39:41,168 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:39:41,168 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 372.25) internal successors, (2978), 8 states have internal predecessors, (2978), 0 states have call successors, (0), 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 3167
[2023-11-29 02:39:41,171 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:39:41,178 INFO  L225             Difference]: With dead ends: 14447
[2023-11-29 02:39:41,178 INFO  L226             Difference]: Without dead ends: 9729
[2023-11-29 02:39:41,182 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3175 GetRequests, 3163 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:39:41,182 INFO  L413           NwaCegarLoop]: 8263 mSDtfsCounter, 21920 mSDsluCounter, 40737 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21920 SdHoareTripleChecker+Valid, 49000 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:39:41,182 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21920 Valid, 49000 Invalid, 63 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:39:41,190 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9729 states.
[2023-11-29 02:39:41,239 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9729 to 5186.
[2023-11-29 02:39:41,244 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5186 states, 5185 states have (on average 1.6617164898746384) internal successors, (8616), 5185 states have internal predecessors, (8616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:41,250 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5186 states to 5186 states and 8616 transitions.
[2023-11-29 02:39:41,250 INFO  L78                 Accepts]: Start accepts. Automaton has 5186 states and 8616 transitions. Word has length 3167
[2023-11-29 02:39:41,252 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:39:41,252 INFO  L495      AbstractCegarLoop]: Abstraction has 5186 states and 8616 transitions.
[2023-11-29 02:39:41,252 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 372.25) internal successors, (2978), 8 states have internal predecessors, (2978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:41,253 INFO  L276                IsEmpty]: Start isEmpty. Operand 5186 states and 8616 transitions.
[2023-11-29 02:39:41,298 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3169
[2023-11-29 02:39:41,298 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:39:41,299 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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[2023-11-29 02:39:41,332 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0
[2023-11-29 02:39:41,499 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:39:41,499 INFO  L420      AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:39:41,500 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:39:41,500 INFO  L85        PathProgramCache]: Analyzing trace with hash 1635998354, now seen corresponding path program 1 times
[2023-11-29 02:39:41,500 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:39:41,501 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598696129]
[2023-11-29 02:39:41,501 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:39:41,501 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:39:41,708 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:39:41,708 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [203214254]
[2023-11-29 02:39:41,709 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:39:41,709 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:39:41,709 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:39:41,710 INFO  L229       MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:39:41,710 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process
[2023-11-29 02:39:44,414 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:39:44,493 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12820 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:39:44,529 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:39:44,667 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked.
[2023-11-29 02:39:44,667 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:39:44,667 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:39:44,667 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598696129]
[2023-11-29 02:39:44,668 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:39:44,668 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203214254]
[2023-11-29 02:39:44,668 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [203214254] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:39:44,668 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:39:44,669 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:39:44,669 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114306237]
[2023-11-29 02:39:44,669 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:39:44,671 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:39:44,671 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:39:44,672 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:39:44,672 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:39:44,673 INFO  L87              Difference]: Start difference. First operand 5186 states and 8616 transitions. Second operand  has 7 states, 7 states have (on average 425.2857142857143) internal successors, (2977), 7 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:44,967 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:39:44,967 INFO  L93              Difference]: Finished difference Result 14447 states and 23998 transitions.
[2023-11-29 02:39:44,968 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:39:44,968 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 425.2857142857143) internal successors, (2977), 7 states have internal predecessors, (2977), 0 states have call successors, (0), 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 3168
[2023-11-29 02:39:44,970 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:39:44,977 INFO  L225             Difference]: With dead ends: 14447
[2023-11-29 02:39:44,978 INFO  L226             Difference]: Without dead ends: 9735
[2023-11-29 02:39:44,981 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3176 GetRequests, 3165 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-29 02:39:44,981 INFO  L413           NwaCegarLoop]: 8273 mSDtfsCounter, 21916 mSDsluCounter, 32513 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21916 SdHoareTripleChecker+Valid, 40786 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:39:44,981 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21916 Valid, 40786 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-29 02:39:44,989 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9735 states.
[2023-11-29 02:39:45,037 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9735 to 5186.
[2023-11-29 02:39:45,042 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5186 states, 5185 states have (on average 1.6617164898746384) internal successors, (8616), 5185 states have internal predecessors, (8616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:45,048 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5186 states to 5186 states and 8616 transitions.
[2023-11-29 02:39:45,049 INFO  L78                 Accepts]: Start accepts. Automaton has 5186 states and 8616 transitions. Word has length 3168
[2023-11-29 02:39:45,050 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:39:45,050 INFO  L495      AbstractCegarLoop]: Abstraction has 5186 states and 8616 transitions.
[2023-11-29 02:39:45,051 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 425.2857142857143) internal successors, (2977), 7 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:45,051 INFO  L276                IsEmpty]: Start isEmpty. Operand 5186 states and 8616 transitions.
[2023-11-29 02:39:45,095 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3170
[2023-11-29 02:39:45,095 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:39:45,096 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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[2023-11-29 02:39:45,129 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0
[2023-11-29 02:39:45,296 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77
[2023-11-29 02:39:45,297 INFO  L420      AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:39:45,297 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:39:45,297 INFO  L85        PathProgramCache]: Analyzing trace with hash 1777871150, now seen corresponding path program 1 times
[2023-11-29 02:39:45,297 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:39:45,297 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195789400]
[2023-11-29 02:39:45,298 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:39:45,298 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:39:45,515 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:39:45,515 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790615826]
[2023-11-29 02:39:45,516 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:39:45,516 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:39:45,516 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:39:45,517 INFO  L229       MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:39:45,518 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process
[2023-11-29 02:39:48,149 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:39:48,227 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12823 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:39:48,262 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:39:48,418 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked.
[2023-11-29 02:39:48,418 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:39:48,418 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:39:48,418 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195789400]
[2023-11-29 02:39:48,419 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:39:48,419 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790615826]
[2023-11-29 02:39:48,419 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790615826] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:39:48,419 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:39:48,420 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:39:48,420 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178184888]
[2023-11-29 02:39:48,420 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:39:48,422 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:39:48,422 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:39:48,423 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:39:48,423 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:39:48,424 INFO  L87              Difference]: Start difference. First operand 5186 states and 8616 transitions. Second operand  has 8 states, 8 states have (on average 371.875) internal successors, (2975), 8 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:48,789 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:39:48,790 INFO  L93              Difference]: Finished difference Result 14447 states and 23998 transitions.
[2023-11-29 02:39:48,790 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:39:48,791 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 371.875) internal successors, (2975), 8 states have internal predecessors, (2975), 0 states have call successors, (0), 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 3169
[2023-11-29 02:39:48,793 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:39:48,801 INFO  L225             Difference]: With dead ends: 14447
[2023-11-29 02:39:48,801 INFO  L226             Difference]: Without dead ends: 9744
[2023-11-29 02:39:48,804 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3177 GetRequests, 3165 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:39:48,805 INFO  L413           NwaCegarLoop]: 8288 mSDtfsCounter, 21913 mSDsluCounter, 40837 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21913 SdHoareTripleChecker+Valid, 49125 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:39:48,805 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21913 Valid, 49125 Invalid, 63 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:39:48,813 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9744 states.
[2023-11-29 02:39:48,858 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9744 to 5186.
[2023-11-29 02:39:48,863 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5186 states, 5185 states have (on average 1.6617164898746384) internal successors, (8616), 5185 states have internal predecessors, (8616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:48,869 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5186 states to 5186 states and 8616 transitions.
[2023-11-29 02:39:48,869 INFO  L78                 Accepts]: Start accepts. Automaton has 5186 states and 8616 transitions. Word has length 3169
[2023-11-29 02:39:48,871 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:39:48,871 INFO  L495      AbstractCegarLoop]: Abstraction has 5186 states and 8616 transitions.
[2023-11-29 02:39:48,871 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 371.875) internal successors, (2975), 8 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:48,871 INFO  L276                IsEmpty]: Start isEmpty. Operand 5186 states and 8616 transitions.
[2023-11-29 02:39:48,915 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3171
[2023-11-29 02:39:48,915 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:39:48,916 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:39:48,947 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0
[2023-11-29 02:39:49,116 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78
[2023-11-29 02:39:49,116 INFO  L420      AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:39:49,117 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:39:49,117 INFO  L85        PathProgramCache]: Analyzing trace with hash 1152350076, now seen corresponding path program 1 times
[2023-11-29 02:39:49,117 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:39:49,117 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270721741]
[2023-11-29 02:39:49,118 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:39:49,118 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:39:49,321 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:39:49,321 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1188783153]
[2023-11-29 02:39:49,322 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:39:49,322 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:39:49,322 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:39:49,323 INFO  L229       MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:39:49,323 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process
[2023-11-29 02:39:52,075 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:39:52,168 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12826 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:39:52,203 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:39:52,348 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked.
[2023-11-29 02:39:52,348 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:39:52,349 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:39:52,349 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270721741]
[2023-11-29 02:39:52,349 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:39:52,349 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188783153]
[2023-11-29 02:39:52,349 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188783153] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:39:52,349 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:39:52,350 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:39:52,350 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167553631]
[2023-11-29 02:39:52,350 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:39:52,352 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:39:52,352 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:39:52,354 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:39:52,354 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:39:52,354 INFO  L87              Difference]: Start difference. First operand 5186 states and 8616 transitions. Second operand  has 7 states, 7 states have (on average 424.85714285714283) internal successors, (2974), 7 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:52,654 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:39:52,654 INFO  L93              Difference]: Finished difference Result 14447 states and 23998 transitions.
[2023-11-29 02:39:52,654 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:39:52,655 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 424.85714285714283) internal successors, (2974), 7 states have internal predecessors, (2974), 0 states have call successors, (0), 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 3170
[2023-11-29 02:39:52,657 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:39:52,704 INFO  L225             Difference]: With dead ends: 14447
[2023-11-29 02:39:52,704 INFO  L226             Difference]: Without dead ends: 9750
[2023-11-29 02:39:52,706 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3178 GetRequests, 3167 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-29 02:39:52,706 INFO  L413           NwaCegarLoop]: 8298 mSDtfsCounter, 21909 mSDsluCounter, 32588 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21909 SdHoareTripleChecker+Valid, 40886 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:39:52,707 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21909 Valid, 40886 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:39:52,715 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9750 states.
[2023-11-29 02:39:52,755 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9750 to 5186.
[2023-11-29 02:39:52,759 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5186 states, 5185 states have (on average 1.6617164898746384) internal successors, (8616), 5185 states have internal predecessors, (8616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:52,765 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5186 states to 5186 states and 8616 transitions.
[2023-11-29 02:39:52,765 INFO  L78                 Accepts]: Start accepts. Automaton has 5186 states and 8616 transitions. Word has length 3170
[2023-11-29 02:39:52,766 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:39:52,766 INFO  L495      AbstractCegarLoop]: Abstraction has 5186 states and 8616 transitions.
[2023-11-29 02:39:52,767 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 424.85714285714283) internal successors, (2974), 7 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:52,767 INFO  L276                IsEmpty]: Start isEmpty. Operand 5186 states and 8616 transitions.
[2023-11-29 02:39:52,811 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3172
[2023-11-29 02:39:52,811 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:39:52,811 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:39:52,845 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0
[2023-11-29 02:39:53,012 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79
[2023-11-29 02:39:53,012 INFO  L420      AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:39:53,012 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:39:53,013 INFO  L85        PathProgramCache]: Analyzing trace with hash -336802324, now seen corresponding path program 1 times
[2023-11-29 02:39:53,013 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:39:53,013 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246833061]
[2023-11-29 02:39:53,013 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:39:53,013 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:39:53,217 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:39:53,217 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362423412]
[2023-11-29 02:39:53,217 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:39:53,218 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:39:53,218 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:39:53,218 INFO  L229       MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:39:53,219 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process
[2023-11-29 02:39:55,944 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:39:56,022 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12830 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:39:56,058 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:39:56,207 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked.
[2023-11-29 02:39:56,207 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:39:56,207 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:39:56,207 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246833061]
[2023-11-29 02:39:56,207 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:39:56,207 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362423412]
[2023-11-29 02:39:56,207 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [362423412] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:39:56,207 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:39:56,208 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 02:39:56,209 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116906458]
[2023-11-29 02:39:56,209 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:39:56,210 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 02:39:56,210 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:39:56,212 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 02:39:56,212 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 02:39:56,212 INFO  L87              Difference]: Start difference. First operand 5186 states and 8616 transitions. Second operand  has 7 states, 7 states have (on average 424.57142857142856) internal successors, (2972), 7 states have internal predecessors, (2972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:56,519 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:39:56,519 INFO  L93              Difference]: Finished difference Result 14447 states and 23998 transitions.
[2023-11-29 02:39:56,520 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:39:56,520 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 424.57142857142856) internal successors, (2972), 7 states have internal predecessors, (2972), 0 states have call successors, (0), 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 3171
[2023-11-29 02:39:56,522 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:39:56,529 INFO  L225             Difference]: With dead ends: 14447
[2023-11-29 02:39:56,530 INFO  L226             Difference]: Without dead ends: 9759
[2023-11-29 02:39:56,533 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3179 GetRequests, 3168 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-29 02:39:56,533 INFO  L413           NwaCegarLoop]: 8313 mSDtfsCounter, 21906 mSDsluCounter, 32633 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21906 SdHoareTripleChecker+Valid, 40946 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:39:56,533 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21906 Valid, 40946 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:39:56,541 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9759 states.
[2023-11-29 02:39:56,586 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9759 to 5186.
[2023-11-29 02:39:56,590 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5186 states, 5185 states have (on average 1.6617164898746384) internal successors, (8616), 5185 states have internal predecessors, (8616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:56,596 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5186 states to 5186 states and 8616 transitions.
[2023-11-29 02:39:56,596 INFO  L78                 Accepts]: Start accepts. Automaton has 5186 states and 8616 transitions. Word has length 3171
[2023-11-29 02:39:56,597 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:39:56,597 INFO  L495      AbstractCegarLoop]: Abstraction has 5186 states and 8616 transitions.
[2023-11-29 02:39:56,598 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 424.57142857142856) internal successors, (2972), 7 states have internal predecessors, (2972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:39:56,598 INFO  L276                IsEmpty]: Start isEmpty. Operand 5186 states and 8616 transitions.
[2023-11-29 02:39:56,641 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3173
[2023-11-29 02:39:56,641 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:39:56,642 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:39:56,675 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0
[2023-11-29 02:39:56,842 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:39:56,843 INFO  L420      AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:39:56,843 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:39:56,843 INFO  L85        PathProgramCache]: Analyzing trace with hash 1868641624, now seen corresponding path program 1 times
[2023-11-29 02:39:56,843 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:39:56,843 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72437305]
[2023-11-29 02:39:56,844 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:39:56,844 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:39:57,049 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:39:57,049 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1678476455]
[2023-11-29 02:39:57,050 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:39:57,050 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:39:57,050 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:39:57,051 INFO  L229       MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:39:57,051 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process
[2023-11-29 02:39:59,697 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:39:59,774 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12833 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:39:59,809 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:40:00,022 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked.
[2023-11-29 02:40:00,023 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:40:00,023 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:40:00,023 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72437305]
[2023-11-29 02:40:00,023 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:40:00,023 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678476455]
[2023-11-29 02:40:00,023 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678476455] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:40:00,023 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:40:00,024 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:40:00,024 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089376435]
[2023-11-29 02:40:00,024 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:40:00,025 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:40:00,026 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:40:00,027 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:40:00,027 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:40:00,027 INFO  L87              Difference]: Start difference. First operand 5186 states and 8616 transitions. Second operand  has 8 states, 8 states have (on average 371.375) internal successors, (2971), 8 states have internal predecessors, (2971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:40:00,363 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:40:00,363 INFO  L93              Difference]: Finished difference Result 14447 states and 23998 transitions.
[2023-11-29 02:40:00,363 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:40:00,364 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 371.375) internal successors, (2971), 8 states have internal predecessors, (2971), 0 states have call successors, (0), 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 3172
[2023-11-29 02:40:00,366 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:40:00,373 INFO  L225             Difference]: With dead ends: 14447
[2023-11-29 02:40:00,373 INFO  L226             Difference]: Without dead ends: 9765
[2023-11-29 02:40:00,377 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3180 GetRequests, 3168 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:40:00,377 INFO  L413           NwaCegarLoop]: 8323 mSDtfsCounter, 21902 mSDsluCounter, 40977 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21902 SdHoareTripleChecker+Valid, 49300 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:40:00,377 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21902 Valid, 49300 Invalid, 63 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:40:00,384 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9765 states.
[2023-11-29 02:40:00,429 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9765 to 5186.
[2023-11-29 02:40:00,434 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5186 states, 5185 states have (on average 1.6617164898746384) internal successors, (8616), 5185 states have internal predecessors, (8616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:40:00,439 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5186 states to 5186 states and 8616 transitions.
[2023-11-29 02:40:00,439 INFO  L78                 Accepts]: Start accepts. Automaton has 5186 states and 8616 transitions. Word has length 3172
[2023-11-29 02:40:00,441 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:40:00,441 INFO  L495      AbstractCegarLoop]: Abstraction has 5186 states and 8616 transitions.
[2023-11-29 02:40:00,442 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 371.375) internal successors, (2971), 8 states have internal predecessors, (2971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:40:00,442 INFO  L276                IsEmpty]: Start isEmpty. Operand 5186 states and 8616 transitions.
[2023-11-29 02:40:00,485 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3174
[2023-11-29 02:40:00,485 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:40:00,486 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:40:00,520 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0
[2023-11-29 02:40:00,686 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:40:00,686 INFO  L420      AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:40:00,687 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:40:00,687 INFO  L85        PathProgramCache]: Analyzing trace with hash 614778600, now seen corresponding path program 1 times
[2023-11-29 02:40:00,687 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:40:00,687 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745584333]
[2023-11-29 02:40:00,687 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:40:00,688 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:40:00,887 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:40:00,887 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1317912351]
[2023-11-29 02:40:00,888 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:40:00,888 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:40:00,888 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:40:00,889 INFO  L229       MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:40:00,890 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process
[2023-11-29 02:40:03,765 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:40:03,844 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12836 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-29 02:40:03,883 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:40:04,039 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked.
[2023-11-29 02:40:04,039 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:40:04,039 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:40:04,039 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745584333]
[2023-11-29 02:40:04,039 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:40:04,039 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317912351]
[2023-11-29 02:40:04,039 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317912351] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:40:04,039 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:40:04,040 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 02:40:04,041 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071005847]
[2023-11-29 02:40:04,041 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:40:04,042 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 02:40:04,042 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:40:04,044 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 02:40:04,044 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:40:04,045 INFO  L87              Difference]: Start difference. First operand 5186 states and 8616 transitions. Second operand  has 8 states, 8 states have (on average 371.125) internal successors, (2969), 8 states have internal predecessors, (2969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:40:04,378 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:40:04,378 INFO  L93              Difference]: Finished difference Result 14447 states and 23998 transitions.
[2023-11-29 02:40:04,378 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 02:40:04,379 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 371.125) internal successors, (2969), 8 states have internal predecessors, (2969), 0 states have call successors, (0), 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 3173
[2023-11-29 02:40:04,381 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:40:04,389 INFO  L225             Difference]: With dead ends: 14447
[2023-11-29 02:40:04,389 INFO  L226             Difference]: Without dead ends: 9774
[2023-11-29 02:40:04,393 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3181 GetRequests, 3169 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-29 02:40:04,393 INFO  L413           NwaCegarLoop]: 8338 mSDtfsCounter, 21899 mSDsluCounter, 40149 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21899 SdHoareTripleChecker+Valid, 48487 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:40:04,393 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21899 Valid, 48487 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:40:04,401 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9774 states.
[2023-11-29 02:40:04,452 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9774 to 5186.
[2023-11-29 02:40:04,457 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5186 states, 5185 states have (on average 1.6617164898746384) internal successors, (8616), 5185 states have internal predecessors, (8616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:40:04,463 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5186 states to 5186 states and 8616 transitions.
[2023-11-29 02:40:04,463 INFO  L78                 Accepts]: Start accepts. Automaton has 5186 states and 8616 transitions. Word has length 3173
[2023-11-29 02:40:04,465 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:40:04,465 INFO  L495      AbstractCegarLoop]: Abstraction has 5186 states and 8616 transitions.
[2023-11-29 02:40:04,466 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 371.125) internal successors, (2969), 8 states have internal predecessors, (2969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:40:04,466 INFO  L276                IsEmpty]: Start isEmpty. Operand 5186 states and 8616 transitions.
[2023-11-29 02:40:04,512 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3175
[2023-11-29 02:40:04,512 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:40:04,512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:40:04,547 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0
[2023-11-29 02:40:04,713 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:40:04,713 INFO  L420      AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:40:04,713 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:40:04,713 INFO  L85        PathProgramCache]: Analyzing trace with hash -1917638656, now seen corresponding path program 1 times
[2023-11-29 02:40:04,714 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:40:04,714 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572580616]
[2023-11-29 02:40:04,714 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:40:04,714 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:40:04,923 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:40:04,923 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740436112]
[2023-11-29 02:40:04,924 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:40:04,924 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:40:04,924 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:40:04,925 INFO  L229       MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:40:04,927 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process
[2023-11-29 02:40:07,758 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:40:07,839 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12840 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 02:40:07,874 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:40:07,941 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:40:07,941 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:40:07,941 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:40:07,941 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572580616]
[2023-11-29 02:40:07,941 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:40:07,941 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740436112]
[2023-11-29 02:40:07,941 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [740436112] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:40:07,941 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:40:07,942 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2023-11-29 02:40:07,942 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454834625]
[2023-11-29 02:40:07,942 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:40:07,944 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-29 02:40:07,944 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:40:07,945 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-29 02:40:07,945 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2023-11-29 02:40:07,946 INFO  L87              Difference]: Start difference. First operand 5186 states and 8616 transitions. Second operand  has 6 states, 6 states have (on average 529.0) internal successors, (3174), 6 states have internal predecessors, (3174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:40:08,205 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:40:08,205 INFO  L93              Difference]: Finished difference Result 14456 states and 24010 transitions.
[2023-11-29 02:40:08,205 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-11-29 02:40:08,206 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 529.0) internal successors, (3174), 6 states have internal predecessors, (3174), 0 states have call successors, (0), 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 3174
[2023-11-29 02:40:08,206 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:40:08,214 INFO  L225             Difference]: With dead ends: 14456
[2023-11-29 02:40:08,214 INFO  L226             Difference]: Without dead ends: 9820
[2023-11-29 02:40:08,217 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3176 GetRequests, 3170 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:40:08,218 INFO  L413           NwaCegarLoop]: 8788 mSDtfsCounter, 7489 mSDsluCounter, 34045 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7489 SdHoareTripleChecker+Valid, 42833 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:40:08,218 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [7489 Valid, 42833 Invalid, 64 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:40:08,226 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9820 states.
[2023-11-29 02:40:08,278 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9820 to 5191.
[2023-11-29 02:40:08,283 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5191 states, 5190 states have (on average 1.6610789980732177) internal successors, (8621), 5190 states have internal predecessors, (8621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:40:08,289 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5191 states to 5191 states and 8621 transitions.
[2023-11-29 02:40:08,289 INFO  L78                 Accepts]: Start accepts. Automaton has 5191 states and 8621 transitions. Word has length 3174
[2023-11-29 02:40:08,289 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:40:08,290 INFO  L495      AbstractCegarLoop]: Abstraction has 5191 states and 8621 transitions.
[2023-11-29 02:40:08,290 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 529.0) internal successors, (3174), 6 states have internal predecessors, (3174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:40:08,290 INFO  L276                IsEmpty]: Start isEmpty. Operand 5191 states and 8621 transitions.
[2023-11-29 02:40:08,337 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3175
[2023-11-29 02:40:08,337 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:40:08,338 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:40:08,378 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0
[2023-11-29 02:40:08,538 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:40:08,538 INFO  L420      AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:40:08,539 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:40:08,539 INFO  L85        PathProgramCache]: Analyzing trace with hash 1831913854, now seen corresponding path program 1 times
[2023-11-29 02:40:08,539 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:40:08,539 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621218535]
[2023-11-29 02:40:08,540 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:40:08,540 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:40:08,748 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:40:08,748 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685061274]
[2023-11-29 02:40:08,748 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:40:08,748 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:40:08,749 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:40:08,749 INFO  L229       MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:40:08,750 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process
[2023-11-29 02:40:11,653 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:40:11,734 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12840 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 02:40:11,768 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:40:11,835 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:40:11,835 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 02:40:11,835 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:40:11,835 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621218535]
[2023-11-29 02:40:11,835 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:40:11,835 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685061274]
[2023-11-29 02:40:11,835 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685061274] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:40:11,835 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:40:11,836 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2023-11-29 02:40:11,836 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675269528]
[2023-11-29 02:40:11,836 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:40:11,838 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-29 02:40:11,838 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:40:11,839 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-29 02:40:11,839 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2023-11-29 02:40:11,840 INFO  L87              Difference]: Start difference. First operand 5191 states and 8621 transitions. Second operand  has 6 states, 6 states have (on average 529.0) internal successors, (3174), 6 states have internal predecessors, (3174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:40:12,104 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:40:12,104 INFO  L93              Difference]: Finished difference Result 14472 states and 24026 transitions.
[2023-11-29 02:40:12,105 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-11-29 02:40:12,106 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 529.0) internal successors, (3174), 6 states have internal predecessors, (3174), 0 states have call successors, (0), 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 3174
[2023-11-29 02:40:12,106 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:40:12,115 INFO  L225             Difference]: With dead ends: 14472
[2023-11-29 02:40:12,115 INFO  L226             Difference]: Without dead ends: 9831
[2023-11-29 02:40:12,118 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3176 GetRequests, 3170 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2023-11-29 02:40:12,119 INFO  L413           NwaCegarLoop]: 9148 mSDtfsCounter, 7489 mSDsluCounter, 35125 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7489 SdHoareTripleChecker+Valid, 44273 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:40:12,119 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [7489 Valid, 44273 Invalid, 64 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:40:12,126 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9831 states.
[2023-11-29 02:40:12,176 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9831 to 5196.
[2023-11-29 02:40:12,180 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5196 states, 5195 states have (on average 1.6604427333974976) internal successors, (8626), 5195 states have internal predecessors, (8626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:40:12,186 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5196 states to 5196 states and 8626 transitions.
[2023-11-29 02:40:12,186 INFO  L78                 Accepts]: Start accepts. Automaton has 5196 states and 8626 transitions. Word has length 3174
[2023-11-29 02:40:12,187 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:40:12,187 INFO  L495      AbstractCegarLoop]: Abstraction has 5196 states and 8626 transitions.
[2023-11-29 02:40:12,188 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 529.0) internal successors, (3174), 6 states have internal predecessors, (3174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:40:12,188 INFO  L276                IsEmpty]: Start isEmpty. Operand 5196 states and 8626 transitions.
[2023-11-29 02:40:12,233 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3175
[2023-11-29 02:40:12,233 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:40:12,234 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:40:12,273 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0
[2023-11-29 02:40:12,434 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:40:12,434 INFO  L420      AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:40:12,434 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:40:12,435 INFO  L85        PathProgramCache]: Analyzing trace with hash 1458168700, now seen corresponding path program 1 times
[2023-11-29 02:40:12,435 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:40:12,435 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927268985]
[2023-11-29 02:40:12,436 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:40:12,436 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:40:12,659 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:40:12,659 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091721253]
[2023-11-29 02:40:12,660 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:40:12,660 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:40:12,660 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:40:12,661 INFO  L229       MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:40:12,663 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process
[2023-11-29 02:40:15,375 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:40:15,457 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12840 conjuncts, 23 conjunts are in the unsatisfiable core
[2023-11-29 02:40:15,496 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:40:18,348 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 150 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:40:18,348 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:40:29,660 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 150 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:40:29,660 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:40:29,660 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927268985]
[2023-11-29 02:40:29,660 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:40:29,660 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091721253]
[2023-11-29 02:40:29,660 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091721253] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-29 02:40:29,660 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-11-29 02:40:29,662 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19
[2023-11-29 02:40:29,663 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90720920]
[2023-11-29 02:40:29,663 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-11-29 02:40:29,668 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 19 states
[2023-11-29 02:40:29,668 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:40:29,672 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2023-11-29 02:40:29,672 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342
[2023-11-29 02:40:29,674 INFO  L87              Difference]: Start difference. First operand 5196 states and 8626 transitions. Second operand  has 19 states, 19 states have (on average 322.94736842105266) internal successors, (6136), 19 states have internal predecessors, (6136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:40:36,630 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:40:36,630 INFO  L93              Difference]: Finished difference Result 24681 states and 40850 transitions.
[2023-11-29 02:40:36,630 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. 
[2023-11-29 02:40:36,631 INFO  L78                 Accepts]: Start accepts. Automaton has  has 19 states, 19 states have (on average 322.94736842105266) internal successors, (6136), 19 states have internal predecessors, (6136), 0 states have call successors, (0), 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 3174
[2023-11-29 02:40:36,633 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:40:36,644 INFO  L225             Difference]: With dead ends: 24681
[2023-11-29 02:40:36,644 INFO  L226             Difference]: Without dead ends: 19857
[2023-11-29 02:40:36,647 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6376 GetRequests, 6335 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=411, Invalid=1395, Unknown=0, NotChecked=0, Total=1806
[2023-11-29 02:40:36,647 INFO  L413           NwaCegarLoop]: 8278 mSDtfsCounter, 114284 mSDsluCounter, 107281 mSDsCounter, 0 mSdLazyCounter, 6203 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114284 SdHoareTripleChecker+Valid, 115559 SdHoareTripleChecker+Invalid, 6208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time
[2023-11-29 02:40:36,647 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [114284 Valid, 115559 Invalid, 6208 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [5 Valid, 6203 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time]
[2023-11-29 02:40:36,660 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19857 states.
[2023-11-29 02:40:36,779 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19857 to 9819.
[2023-11-29 02:40:36,788 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9819 states, 9818 states have (on average 1.6602159299246282) internal successors, (16300), 9818 states have internal predecessors, (16300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:40:36,800 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9819 states to 9819 states and 16300 transitions.
[2023-11-29 02:40:36,800 INFO  L78                 Accepts]: Start accepts. Automaton has 9819 states and 16300 transitions. Word has length 3174
[2023-11-29 02:40:36,802 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:40:36,802 INFO  L495      AbstractCegarLoop]: Abstraction has 9819 states and 16300 transitions.
[2023-11-29 02:40:36,803 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 19 states, 19 states have (on average 322.94736842105266) internal successors, (6136), 19 states have internal predecessors, (6136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:40:36,803 INFO  L276                IsEmpty]: Start isEmpty. Operand 9819 states and 16300 transitions.
[2023-11-29 02:40:36,853 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3176
[2023-11-29 02:40:36,854 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:40:36,854 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:40:36,895 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0
[2023-11-29 02:40:37,055 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:40:37,055 INFO  L420      AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:40:37,055 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:40:37,055 INFO  L85        PathProgramCache]: Analyzing trace with hash -1155444016, now seen corresponding path program 1 times
[2023-11-29 02:40:37,056 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:40:37,056 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549035008]
[2023-11-29 02:40:37,056 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:40:37,056 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:40:37,268 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:40:37,268 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361427682]
[2023-11-29 02:40:37,268 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:40:37,269 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:40:37,269 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:40:37,269 INFO  L229       MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:40:37,270 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process
[2023-11-29 02:40:40,019 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:40:40,099 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12843 conjuncts, 27 conjunts are in the unsatisfiable core
[2023-11-29 02:40:40,138 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:40:43,462 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 140 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:40:43,462 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:40:47,159 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 148 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:40:47,159 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:40:47,159 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549035008]
[2023-11-29 02:40:47,159 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:40:47,159 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361427682]
[2023-11-29 02:40:47,159 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [361427682] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-29 02:40:47,159 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-11-29 02:40:47,161 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21
[2023-11-29 02:40:47,161 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004473324]
[2023-11-29 02:40:47,161 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-11-29 02:40:47,164 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 21 states
[2023-11-29 02:40:47,164 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:40:47,166 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2023-11-29 02:40:47,166 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420
[2023-11-29 02:40:47,167 INFO  L87              Difference]: Start difference. First operand 9819 states and 16300 transitions. Second operand  has 21 states, 21 states have (on average 293.04761904761904) internal successors, (6154), 21 states have internal predecessors, (6154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:41:09,077 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:41:09,077 INFO  L93              Difference]: Finished difference Result 73430 states and 121633 transitions.
[2023-11-29 02:41:09,078 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. 
[2023-11-29 02:41:09,079 INFO  L78                 Accepts]: Start accepts. Automaton has  has 21 states, 21 states have (on average 293.04761904761904) internal successors, (6154), 21 states have internal predecessors, (6154), 0 states have call successors, (0), 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 3175
[2023-11-29 02:41:09,080 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:41:09,126 INFO  L225             Difference]: With dead ends: 73430
[2023-11-29 02:41:09,126 INFO  L226             Difference]: Without dead ends: 63744
[2023-11-29 02:41:09,139 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6393 GetRequests, 6339 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=642, Invalid=2438, Unknown=0, NotChecked=0, Total=3080
[2023-11-29 02:41:09,139 INFO  L413           NwaCegarLoop]: 13020 mSDtfsCounter, 145429 mSDsluCounter, 149261 mSDsCounter, 0 mSdLazyCounter, 34259 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145429 SdHoareTripleChecker+Valid, 162281 SdHoareTripleChecker+Invalid, 34276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.6s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 34259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.6s IncrementalHoareTripleChecker+Time
[2023-11-29 02:41:09,139 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [145429 Valid, 162281 Invalid, 34276 Unknown, 0 Unchecked, 0.6s Time], IncrementalHoareTripleChecker [17 Valid, 34259 Invalid, 0 Unknown, 0 Unchecked, 18.6s Time]
[2023-11-29 02:41:09,195 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 63744 states.
[2023-11-29 02:41:09,747 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 63744 to 15264.
[2023-11-29 02:41:09,755 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 15264 states, 15263 states have (on average 1.6604861429600997) internal successors, (25344), 15263 states have internal predecessors, (25344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:41:09,771 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15264 states to 15264 states and 25344 transitions.
[2023-11-29 02:41:09,771 INFO  L78                 Accepts]: Start accepts. Automaton has 15264 states and 25344 transitions. Word has length 3175
[2023-11-29 02:41:09,772 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:41:09,772 INFO  L495      AbstractCegarLoop]: Abstraction has 15264 states and 25344 transitions.
[2023-11-29 02:41:09,773 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 21 states, 21 states have (on average 293.04761904761904) internal successors, (6154), 21 states have internal predecessors, (6154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:41:09,773 INFO  L276                IsEmpty]: Start isEmpty. Operand 15264 states and 25344 transitions.
[2023-11-29 02:41:09,823 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3177
[2023-11-29 02:41:09,823 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:41:09,824 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:41:09,863 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0
[2023-11-29 02:41:10,024 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86
[2023-11-29 02:41:10,025 INFO  L420      AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:41:10,025 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:41:10,025 INFO  L85        PathProgramCache]: Analyzing trace with hash 1883835492, now seen corresponding path program 1 times
[2023-11-29 02:41:10,025 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:41:10,025 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257478220]
[2023-11-29 02:41:10,026 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:41:10,026 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:41:10,257 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:41:10,258 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [263973845]
[2023-11-29 02:41:10,258 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:41:10,258 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:41:10,259 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:41:10,259 INFO  L229       MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:41:10,260 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process
[2023-11-29 02:41:13,074 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:41:13,167 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12846 conjuncts, 23 conjunts are in the unsatisfiable core
[2023-11-29 02:41:13,205 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:41:16,498 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 130 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:41:16,498 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:41:20,771 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 144 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:41:20,771 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:41:20,772 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257478220]
[2023-11-29 02:41:20,772 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:41:20,772 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263973845]
[2023-11-29 02:41:20,772 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [263973845] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-29 02:41:20,772 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-11-29 02:41:20,773 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19
[2023-11-29 02:41:20,773 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974654856]
[2023-11-29 02:41:20,774 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-11-29 02:41:20,776 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 19 states
[2023-11-29 02:41:20,776 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:41:20,778 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2023-11-29 02:41:20,778 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342
[2023-11-29 02:41:20,779 INFO  L87              Difference]: Start difference. First operand 15264 states and 25344 transitions. Second operand  has 19 states, 19 states have (on average 324.7368421052632) internal successors, (6170), 19 states have internal predecessors, (6170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:41:33,382 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:41:33,382 INFO  L93              Difference]: Finished difference Result 84103 states and 139229 transitions.
[2023-11-29 02:41:33,383 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. 
[2023-11-29 02:41:33,384 INFO  L78                 Accepts]: Start accepts. Automaton has  has 19 states, 19 states have (on average 324.7368421052632) internal successors, (6170), 19 states have internal predecessors, (6170), 0 states have call successors, (0), 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 3176
[2023-11-29 02:41:33,386 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:41:33,429 INFO  L225             Difference]: With dead ends: 84103
[2023-11-29 02:41:33,429 INFO  L226             Difference]: Without dead ends: 68972
[2023-11-29 02:41:33,439 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6382 GetRequests, 6340 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=470, Invalid=1422, Unknown=0, NotChecked=0, Total=1892
[2023-11-29 02:41:33,439 INFO  L413           NwaCegarLoop]: 6671 mSDtfsCounter, 127022 mSDsluCounter, 79095 mSDsCounter, 0 mSdLazyCounter, 19971 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127022 SdHoareTripleChecker+Valid, 85766 SdHoareTripleChecker+Invalid, 19977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time
[2023-11-29 02:41:33,440 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [127022 Valid, 85766 Invalid, 19977 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [6 Valid, 19971 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time]
[2023-11-29 02:41:33,480 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 68972 states.
[2023-11-29 02:41:33,838 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 68972 to 21135.
[2023-11-29 02:41:33,855 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 21135 states, 21134 states have (on average 1.6607362543768336) internal successors, (35098), 21134 states have internal predecessors, (35098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:41:33,880 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21135 states to 21135 states and 35098 transitions.
[2023-11-29 02:41:33,881 INFO  L78                 Accepts]: Start accepts. Automaton has 21135 states and 35098 transitions. Word has length 3176
[2023-11-29 02:41:33,882 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:41:33,882 INFO  L495      AbstractCegarLoop]: Abstraction has 21135 states and 35098 transitions.
[2023-11-29 02:41:33,884 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 19 states, 19 states have (on average 324.7368421052632) internal successors, (6170), 19 states have internal predecessors, (6170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:41:33,884 INFO  L276                IsEmpty]: Start isEmpty. Operand 21135 states and 35098 transitions.
[2023-11-29 02:41:33,940 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3178
[2023-11-29 02:41:33,940 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:41:33,941 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:41:33,980 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0
[2023-11-29 02:41:34,141 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87
[2023-11-29 02:41:34,141 INFO  L420      AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:41:34,142 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:41:34,142 INFO  L85        PathProgramCache]: Analyzing trace with hash 172366942, now seen corresponding path program 1 times
[2023-11-29 02:41:34,142 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:41:34,142 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988190700]
[2023-11-29 02:41:34,143 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:41:34,143 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:41:34,365 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:41:34,365 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [962729599]
[2023-11-29 02:41:34,366 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:41:34,366 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:41:34,366 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:41:34,367 INFO  L229       MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:41:34,368 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process
[2023-11-29 02:41:37,260 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:41:37,340 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12849 conjuncts, 25 conjunts are in the unsatisfiable core
[2023-11-29 02:41:37,378 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:41:40,706 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 120 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:41:40,706 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:41:44,886 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 140 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:41:44,886 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:41:44,886 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988190700]
[2023-11-29 02:41:44,886 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:41:44,887 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962729599]
[2023-11-29 02:41:44,887 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [962729599] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-29 02:41:44,887 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-11-29 02:41:44,889 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21
[2023-11-29 02:41:44,889 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728476174]
[2023-11-29 02:41:44,889 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-11-29 02:41:44,892 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 21 states
[2023-11-29 02:41:44,892 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:41:44,895 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2023-11-29 02:41:44,895 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420
[2023-11-29 02:41:44,896 INFO  L87              Difference]: Start difference. First operand 21135 states and 35098 transitions. Second operand  has 21 states, 21 states have (on average 294.6666666666667) internal successors, (6188), 21 states have internal predecessors, (6188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:42:07,683 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:42:07,683 INFO  L93              Difference]: Finished difference Result 167813 states and 278008 transitions.
[2023-11-29 02:42:07,683 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. 
[2023-11-29 02:42:07,684 INFO  L78                 Accepts]: Start accepts. Automaton has  has 21 states, 21 states have (on average 294.6666666666667) internal successors, (6188), 21 states have internal predecessors, (6188), 0 states have call successors, (0), 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 3177
[2023-11-29 02:42:07,686 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:42:07,786 INFO  L225             Difference]: With dead ends: 167813
[2023-11-29 02:42:07,787 INFO  L226             Difference]: Without dead ends: 146811
[2023-11-29 02:42:07,801 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6397 GetRequests, 6343 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=642, Invalid=2438, Unknown=0, NotChecked=0, Total=3080
[2023-11-29 02:42:07,801 INFO  L413           NwaCegarLoop]: 13020 mSDtfsCounter, 161434 mSDsluCounter, 168230 mSDsCounter, 0 mSdLazyCounter, 37537 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161434 SdHoareTripleChecker+Valid, 181250 SdHoareTripleChecker+Invalid, 37553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.6s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 37537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.0s IncrementalHoareTripleChecker+Time
[2023-11-29 02:42:07,801 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [161434 Valid, 181250 Invalid, 37553 Unknown, 0 Unchecked, 0.6s Time], IncrementalHoareTripleChecker [16 Valid, 37537 Invalid, 0 Unknown, 0 Unchecked, 19.0s Time]
[2023-11-29 02:42:07,881 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 146811 states.
[2023-11-29 02:42:08,452 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 146811 to 27450.
[2023-11-29 02:42:08,475 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 27450 states, 27449 states have (on average 1.660971255783453) internal successors, (45592), 27449 states have internal predecessors, (45592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:42:08,509 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 27450 states to 27450 states and 45592 transitions.
[2023-11-29 02:42:08,509 INFO  L78                 Accepts]: Start accepts. Automaton has 27450 states and 45592 transitions. Word has length 3177
[2023-11-29 02:42:08,511 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:42:08,511 INFO  L495      AbstractCegarLoop]: Abstraction has 27450 states and 45592 transitions.
[2023-11-29 02:42:08,512 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 21 states, 21 states have (on average 294.6666666666667) internal successors, (6188), 21 states have internal predecessors, (6188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:42:08,512 INFO  L276                IsEmpty]: Start isEmpty. Operand 27450 states and 45592 transitions.
[2023-11-29 02:42:08,577 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3179
[2023-11-29 02:42:08,577 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:42:08,578 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-29 02:42:08,618 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0
[2023-11-29 02:42:08,779 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:42:08,779 INFO  L420      AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:42:08,779 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:42:08,780 INFO  L85        PathProgramCache]: Analyzing trace with hash -1784511182, now seen corresponding path program 1 times
[2023-11-29 02:42:08,780 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:42:08,780 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588149328]
[2023-11-29 02:42:08,781 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:42:08,781 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:42:08,990 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:42:08,990 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [308350068]
[2023-11-29 02:42:08,991 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:42:08,992 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:42:08,992 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:42:08,992 INFO  L229       MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:42:08,993 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a065674d-0970-463b-9db1-55c1beb291ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process
[2023-11-29 02:42:11,726 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:42:11,809 INFO  L262         TraceCheckSpWp]: Trace formula consists of 12852 conjuncts, 85 conjunts are in the unsatisfiable core
[2023-11-29 02:42:11,850 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:42:41,650 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 118 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:42:41,650 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:43:07,410 INFO  L134       CoverageAnalysis]: Checked inductivity of 284 backedges. 118 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 02:43:07,410 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:43:07,410 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588149328]
[2023-11-29 02:43:07,410 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:43:07,410 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308350068]
[2023-11-29 02:43:07,410 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [308350068] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-29 02:43:07,411 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-11-29 02:43:07,412 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24] total 49
[2023-11-29 02:43:07,412 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514177265]
[2023-11-29 02:43:07,412 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-11-29 02:43:07,415 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 49 states
[2023-11-29 02:43:07,415 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:43:07,417 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants.
[2023-11-29 02:43:07,417 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=2065, Unknown=0, NotChecked=0, Total=2352
[2023-11-29 02:43:07,418 INFO  L87              Difference]: Start difference. First operand 27450 states and 45592 transitions. Second operand  has 49 states, 49 states have (on average 126.63265306122449) internal successors, (6205), 49 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)