./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.needham.3.prop3-back-serstep.c --full-output --architecture 64bit


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


Checking for ERROR reachability
Using default analysis
Version e7bb482b
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_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.needham.3.prop3-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )

 --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash ed419cfde3f00c4e881dce3bd1ed7d811204a89d89673a381df3dbc162643a28
--- Real Ultimate output ---
This is Ultimate 0.2.3-dev-e7bb482
[2023-11-06 22:31:34,680 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-06 22:31:34,766 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-06 22:31:34,772 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-06 22:31:34,772 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-06 22:31:34,799 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-06 22:31:34,800 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-06 22:31:34,801 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-06 22:31:34,801 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-06 22:31:34,802 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-06 22:31:34,803 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-06 22:31:34,803 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-06 22:31:34,804 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-06 22:31:34,805 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-06 22:31:34,805 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-06 22:31:34,806 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-06 22:31:34,806 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-06 22:31:34,807 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-06 22:31:34,807 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-06 22:31:34,808 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-06 22:31:34,809 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-06 22:31:34,809 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-06 22:31:34,810 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-06 22:31:34,811 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-06 22:31:34,811 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-06 22:31:34,812 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-06 22:31:34,812 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-06 22:31:34,813 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-06 22:31:34,813 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-11-06 22:31:34,814 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-06 22:31:34,814 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-06 22:31:34,815 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-06 22:31:34,815 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-06 22:31:34,816 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-06 22:31:34,816 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-06 22:31:34,816 INFO  L153        SettingsManager]:  * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC
[2023-11-06 22:31:34,817 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_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/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_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )


Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed419cfde3f00c4e881dce3bd1ed7d811204a89d89673a381df3dbc162643a28
[2023-11-06 22:31:35,089 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-06 22:31:35,121 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-06 22:31:35,124 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-06 22:31:35,126 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-06 22:31:35,127 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-06 22:31:35,128 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.needham.3.prop3-back-serstep.c
[2023-11-06 22:31:38,262 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-06 22:31:38,794 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-06 22:31:38,794 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.needham.3.prop3-back-serstep.c
[2023-11-06 22:31:38,834 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/data/2f573ee35/14a43aa54b7142da8eda8bbf2e2727b4/FLAG83a0449c5
[2023-11-06 22:31:38,856 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/data/2f573ee35/14a43aa54b7142da8eda8bbf2e2727b4
[2023-11-06 22:31:38,864 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-06 22:31:38,868 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-06 22:31:38,872 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-06 22:31:38,874 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-06 22:31:38,879 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-06 22:31:38,880 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:31:38" (1/1) ...
[2023-11-06 22:31:38,881 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3797ea32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:38, skipping insertion in model container
[2023-11-06 22:31:38,881 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:31:38" (1/1) ...
[2023-11-06 22:31:39,054 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-06 22:31:39,368 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_613e8533-9156-4e79-9402-1a3920f81503/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.needham.3.prop3-back-serstep.c[1175,1188]
[2023-11-06 22:31:40,210 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-06 22:31:40,221 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-06 22:31:40,234 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_613e8533-9156-4e79-9402-1a3920f81503/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.needham.3.prop3-back-serstep.c[1175,1188]
[2023-11-06 22:31:40,744 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-06 22:31:40,761 INFO  L206         MainTranslator]: Completed translation
[2023-11-06 22:31:40,762 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:40 WrapperNode
[2023-11-06 22:31:40,762 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-06 22:31:40,764 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-06 22:31:40,764 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-06 22:31:40,764 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-06 22:31:40,772 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:40" (1/1) ...
[2023-11-06 22:31:40,956 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:40" (1/1) ...
[2023-11-06 22:31:43,729 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 24796
[2023-11-06 22:31:43,730 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-06 22:31:43,730 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-06 22:31:43,731 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-06 22:31:43,731 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-06 22:31:43,741 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:40" (1/1) ...
[2023-11-06 22:31:43,742 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:40" (1/1) ...
[2023-11-06 22:31:44,264 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:40" (1/1) ...
[2023-11-06 22:31:44,265 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:40" (1/1) ...
[2023-11-06 22:31:44,986 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:40" (1/1) ...
[2023-11-06 22:31:45,131 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:40" (1/1) ...
[2023-11-06 22:31:45,522 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:40" (1/1) ...
[2023-11-06 22:31:45,748 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:40" (1/1) ...
[2023-11-06 22:31:46,176 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-06 22:31:46,177 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-06 22:31:46,177 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-06 22:31:46,177 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-06 22:31:46,178 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:40" (1/1) ...
[2023-11-06 22:31:46,188 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-06 22:31:46,201 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:31:46,214 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-11-06 22:31:46,238 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-11-06 22:31:46,262 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-06 22:31:46,262 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-11-06 22:31:46,263 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-06 22:31:46,264 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-06 22:31:47,390 INFO  L236             CfgBuilder]: Building ICFG
[2023-11-06 22:31:47,392 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-06 22:32:03,208 INFO  L277             CfgBuilder]: Performing block encoding
[2023-11-06 22:32:03,245 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-06 22:32:03,245 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-06 22:32:03,252 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:32:03 BoogieIcfgContainer
[2023-11-06 22:32:03,252 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-06 22:32:03,255 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-06 22:32:03,255 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-06 22:32:03,259 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-06 22:32:03,259 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:31:38" (1/3) ...
[2023-11-06 22:32:03,260 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37ded0e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:32:03, skipping insertion in model container
[2023-11-06 22:32:03,260 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:40" (2/3) ...
[2023-11-06 22:32:03,260 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37ded0e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:32:03, skipping insertion in model container
[2023-11-06 22:32:03,261 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:32:03" (3/3) ...
[2023-11-06 22:32:03,262 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.needham.3.prop3-back-serstep.c
[2023-11-06 22:32:03,281 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-06 22:32:03,282 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-06 22:32:03,504 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-06 22:32:03,511 INFO  L357      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@46ca6c14, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>]
[2023-11-06 22:32:03,511 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-06 22:32:03,535 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 5842 states, 5840 states have (on average 1.6705479452054794) internal successors, (9756), 5841 states have internal predecessors, (9756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:32:03,595 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 612
[2023-11-06 22:32:03,597 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:32:03,599 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 22:32:03,600 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:32:03,608 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:32:03,609 INFO  L85        PathProgramCache]: Analyzing trace with hash 1758524264, now seen corresponding path program 1 times
[2023-11-06 22:32:03,621 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:32:03,622 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129336464]
[2023-11-06 22:32:03,623 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:32:03,624 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:32:04,478 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:32:07,352 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:32:07,353 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:32:07,354 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129336464]
[2023-11-06 22:32:07,354 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129336464] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:32:07,355 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:32:07,355 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:32:07,357 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607545988]
[2023-11-06 22:32:07,358 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:32:07,366 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:32:07,366 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:32:07,408 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:32:07,409 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:32:07,424 INFO  L87              Difference]: Start difference. First operand  has 5842 states, 5840 states have (on average 1.6705479452054794) internal successors, (9756), 5841 states have internal predecessors, (9756), 0 states have call successors, (0), 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 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:32:07,841 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:32:07,842 INFO  L93              Difference]: Finished difference Result 11500 states and 19210 transitions.
[2023-11-06 22:32:07,843 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:32:07,845 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 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 611
[2023-11-06 22:32:07,852 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:32:07,908 INFO  L225             Difference]: With dead ends: 11500
[2023-11-06 22:32:07,909 INFO  L226             Difference]: Without dead ends: 5840
[2023-11-06 22:32:07,926 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
[2023-11-06 22:32:07,931 INFO  L413           NwaCegarLoop]: 9748 mSDtfsCounter, 1 mSDsluCounter, 19490 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 29238 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 22:32:07,932 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 29238 Invalid, 11 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 22:32:07,966 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5840 states.
[2023-11-06 22:32:08,152 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5840 to 5840.
[2023-11-06 22:32:08,169 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5840 states, 5839 states have (on average 1.6701489981161157) internal successors, (9752), 5839 states have internal predecessors, (9752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:32:08,202 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5840 states to 5840 states and 9752 transitions.
[2023-11-06 22:32:08,203 INFO  L78                 Accepts]: Start accepts. Automaton has 5840 states and 9752 transitions. Word has length 611
[2023-11-06 22:32:08,207 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:32:08,207 INFO  L495      AbstractCegarLoop]: Abstraction has 5840 states and 9752 transitions.
[2023-11-06 22:32:08,208 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:32:08,209 INFO  L276                IsEmpty]: Start isEmpty. Operand 5840 states and 9752 transitions.
[2023-11-06 22:32:08,231 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 613
[2023-11-06 22:32:08,231 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:32:08,232 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 22:32:08,232 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-06 22:32:08,233 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:32:08,233 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:32:08,234 INFO  L85        PathProgramCache]: Analyzing trace with hash -1318594080, now seen corresponding path program 1 times
[2023-11-06 22:32:08,234 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:32:08,234 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279187939]
[2023-11-06 22:32:08,235 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:32:08,235 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:32:08,628 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:32:10,082 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:32:10,083 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:32:10,084 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279187939]
[2023-11-06 22:32:10,084 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279187939] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:32:10,084 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:32:10,084 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:32:10,085 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689626281]
[2023-11-06 22:32:10,085 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:32:10,088 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:32:10,088 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:32:10,089 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:32:10,090 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:32:10,091 INFO  L87              Difference]: Start difference. First operand 5840 states and 9752 transitions. Second operand  has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:32:10,467 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:32:10,468 INFO  L93              Difference]: Finished difference Result 11501 states and 19206 transitions.
[2023-11-06 22:32:10,468 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:32:10,469 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 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 612
[2023-11-06 22:32:10,470 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:32:10,503 INFO  L225             Difference]: With dead ends: 11501
[2023-11-06 22:32:10,503 INFO  L226             Difference]: Without dead ends: 5843
[2023-11-06 22:32:10,515 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
[2023-11-06 22:32:10,518 INFO  L413           NwaCegarLoop]: 9748 mSDtfsCounter, 1 mSDsluCounter, 19487 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 29235 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 22:32:10,518 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 29235 Invalid, 14 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 22:32:10,533 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5843 states.
[2023-11-06 22:32:10,643 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5843 to 5842.
[2023-11-06 22:32:10,665 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5842 states, 5841 states have (on average 1.669919534326314) internal successors, (9754), 5841 states have internal predecessors, (9754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:32:10,700 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5842 states to 5842 states and 9754 transitions.
[2023-11-06 22:32:10,700 INFO  L78                 Accepts]: Start accepts. Automaton has 5842 states and 9754 transitions. Word has length 612
[2023-11-06 22:32:10,701 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:32:10,702 INFO  L495      AbstractCegarLoop]: Abstraction has 5842 states and 9754 transitions.
[2023-11-06 22:32:10,702 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:32:10,703 INFO  L276                IsEmpty]: Start isEmpty. Operand 5842 states and 9754 transitions.
[2023-11-06 22:32:10,720 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 614
[2023-11-06 22:32:10,720 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:32:10,721 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 22:32:10,721 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-06 22:32:10,722 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:32:10,722 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:32:10,723 INFO  L85        PathProgramCache]: Analyzing trace with hash -657132284, now seen corresponding path program 1 times
[2023-11-06 22:32:10,723 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:32:10,723 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918104422]
[2023-11-06 22:32:10,724 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:32:10,725 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:32:11,062 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:32:12,622 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:32:12,623 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:32:12,623 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918104422]
[2023-11-06 22:32:12,623 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918104422] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:32:12,624 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:32:12,624 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-11-06 22:32:12,624 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162554740]
[2023-11-06 22:32:12,625 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:32:12,666 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-06 22:32:12,666 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:32:12,668 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-06 22:32:12,668 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-06 22:32:12,668 INFO  L87              Difference]: Start difference. First operand 5842 states and 9754 transitions. Second operand  has 5 states, 5 states have (on average 122.6) internal successors, (613), 5 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:32:13,294 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:32:13,295 INFO  L93              Difference]: Finished difference Result 17878 states and 29853 transitions.
[2023-11-06 22:32:13,295 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-06 22:32:13,296 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 122.6) internal successors, (613), 5 states have internal predecessors, (613), 0 states have call successors, (0), 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 613
[2023-11-06 22:32:13,297 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:32:13,380 INFO  L225             Difference]: With dead ends: 17878
[2023-11-06 22:32:13,380 INFO  L226             Difference]: Without dead ends: 12218
[2023-11-06 22:32:13,392 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2023-11-06 22:32:13,398 INFO  L413           NwaCegarLoop]: 10952 mSDtfsCounter, 38671 mSDsluCounter, 19489 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38671 SdHoareTripleChecker+Valid, 30441 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:32:13,400 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [38671 Valid, 30441 Invalid, 15 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:32:13,421 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12218 states.
[2023-11-06 22:32:13,597 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12218 to 6567.
[2023-11-06 22:32:13,610 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6567 states, 6566 states have (on average 1.6693572951568687) internal successors, (10961), 6566 states have internal predecessors, (10961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:32:13,646 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6567 states to 6567 states and 10961 transitions.
[2023-11-06 22:32:13,646 INFO  L78                 Accepts]: Start accepts. Automaton has 6567 states and 10961 transitions. Word has length 613
[2023-11-06 22:32:13,647 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:32:13,648 INFO  L495      AbstractCegarLoop]: Abstraction has 6567 states and 10961 transitions.
[2023-11-06 22:32:13,649 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 122.6) internal successors, (613), 5 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:32:13,653 INFO  L276                IsEmpty]: Start isEmpty. Operand 6567 states and 10961 transitions.
[2023-11-06 22:32:14,015 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4261
[2023-11-06 22:32:14,015 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:32:14,019 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:32:14,020 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-06 22:32:14,020 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:32:14,022 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:32:14,024 INFO  L85        PathProgramCache]: Analyzing trace with hash 99721, now seen corresponding path program 1 times
[2023-11-06 22:32:14,025 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:32:14,030 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877529649]
[2023-11-06 22:32:14,032 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:32:14,032 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:32:14,725 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:32:14,725 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279861610]
[2023-11-06 22:32:14,727 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:32:14,728 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:32:14,728 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:32:14,735 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:32:14,744 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-06 22:32:20,638 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:32:20,752 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17706 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:32:20,887 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:32:21,094 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:32:21,094 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:32:21,095 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:32:21,095 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877529649]
[2023-11-06 22:32:21,095 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:32:21,095 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279861610]
[2023-11-06 22:32:21,095 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279861610] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:32:21,096 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:32:21,097 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:32:21,097 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074120181]
[2023-11-06 22:32:21,098 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:32:21,104 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:32:21,104 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:32:21,111 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:32:21,112 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:32:21,114 INFO  L87              Difference]: Start difference. First operand 6567 states and 10961 transitions. Second operand  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:32:21,400 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:32:21,400 INFO  L93              Difference]: Finished difference Result 12237 states and 20429 transitions.
[2023-11-06 22:32:21,401 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:32:21,403 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 states have internal predecessors, (4260), 0 states have call successors, (0), 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 4260
[2023-11-06 22:32:21,405 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:32:21,417 INFO  L225             Difference]: With dead ends: 12237
[2023-11-06 22:32:21,417 INFO  L226             Difference]: Without dead ends: 6577
[2023-11-06 22:32:21,425 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4259 GetRequests, 4257 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:32:21,426 INFO  L413           NwaCegarLoop]: 9748 mSDtfsCounter, 12 mSDsluCounter, 19484 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29232 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 22:32:21,427 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 29232 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 22:32:21,441 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6577 states.
[2023-11-06 22:32:21,584 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6577 to 6569.
[2023-11-06 22:32:21,597 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6569 states, 6568 states have (on average 1.6691534713763703) internal successors, (10963), 6568 states have internal predecessors, (10963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:32:21,628 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6569 states to 6569 states and 10963 transitions.
[2023-11-06 22:32:21,629 INFO  L78                 Accepts]: Start accepts. Automaton has 6569 states and 10963 transitions. Word has length 4260
[2023-11-06 22:32:21,631 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:32:21,631 INFO  L495      AbstractCegarLoop]: Abstraction has 6569 states and 10963 transitions.
[2023-11-06 22:32:21,634 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:32:21,635 INFO  L276                IsEmpty]: Start isEmpty. Operand 6569 states and 10963 transitions.
[2023-11-06 22:32:21,900 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4261
[2023-11-06 22:32:21,901 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:32:21,905 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:32:21,968 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-06 22:32:22,119 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:32:22,120 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:32:22,121 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:32:22,123 INFO  L85        PathProgramCache]: Analyzing trace with hash 389250775, now seen corresponding path program 1 times
[2023-11-06 22:32:22,123 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:32:22,123 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942857124]
[2023-11-06 22:32:22,125 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:32:22,125 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:32:22,958 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:32:22,958 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [888102206]
[2023-11-06 22:32:22,960 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:32:22,960 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:32:22,963 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:32:22,964 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:32:22,983 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-06 22:32:28,923 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:32:29,050 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17707 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:32:29,186 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:32:29,417 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:32:29,417 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:32:29,418 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:32:29,418 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942857124]
[2023-11-06 22:32:29,418 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:32:29,418 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888102206]
[2023-11-06 22:32:29,418 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [888102206] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:32:29,419 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:32:29,420 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:32:29,420 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904390988]
[2023-11-06 22:32:29,421 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:32:29,429 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:32:29,429 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:32:29,437 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:32:29,437 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:32:29,440 INFO  L87              Difference]: Start difference. First operand 6569 states and 10963 transitions. Second operand  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:32:29,803 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:32:29,803 INFO  L93              Difference]: Finished difference Result 12240 states and 20431 transitions.
[2023-11-06 22:32:29,804 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:32:29,806 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 states have internal predecessors, (4260), 0 states have call successors, (0), 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 4260
[2023-11-06 22:32:29,808 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:32:29,822 INFO  L225             Difference]: With dead ends: 12240
[2023-11-06 22:32:29,822 INFO  L226             Difference]: Without dead ends: 6578
[2023-11-06 22:32:29,831 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4259 GetRequests, 4257 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:32:29,832 INFO  L413           NwaCegarLoop]: 9748 mSDtfsCounter, 12 mSDsluCounter, 19484 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29232 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:32:29,833 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 29232 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:32:29,850 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6578 states.
[2023-11-06 22:32:29,989 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6578 to 6570.
[2023-11-06 22:32:30,001 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6570 states, 6569 states have (on average 1.6690516060283147) internal successors, (10964), 6569 states have internal predecessors, (10964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:32:30,020 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6570 states to 6570 states and 10964 transitions.
[2023-11-06 22:32:30,021 INFO  L78                 Accepts]: Start accepts. Automaton has 6570 states and 10964 transitions. Word has length 4260
[2023-11-06 22:32:30,023 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:32:30,023 INFO  L495      AbstractCegarLoop]: Abstraction has 6570 states and 10964 transitions.
[2023-11-06 22:32:30,025 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:32:30,026 INFO  L276                IsEmpty]: Start isEmpty. Operand 6570 states and 10964 transitions.
[2023-11-06 22:32:30,287 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4261
[2023-11-06 22:32:30,287 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:32:30,291 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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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]
[2023-11-06 22:32:30,344 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2023-11-06 22:32:30,507 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:32:30,508 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:32:30,508 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:32:30,510 INFO  L85        PathProgramCache]: Analyzing trace with hash -1392083675, now seen corresponding path program 1 times
[2023-11-06 22:32:30,510 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:32:30,510 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097583579]
[2023-11-06 22:32:30,511 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:32:30,511 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:32:31,232 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:32:31,236 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [394500225]
[2023-11-06 22:32:31,237 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:32:31,238 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:32:31,238 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:32:31,239 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:32:31,251 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-06 22:32:36,906 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:32:37,031 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17708 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:32:37,195 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:32:37,418 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:32:37,418 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:32:37,418 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:32:37,419 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097583579]
[2023-11-06 22:32:37,419 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:32:37,419 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394500225]
[2023-11-06 22:32:37,419 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [394500225] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:32:37,419 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:32:37,421 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:32:37,421 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476937985]
[2023-11-06 22:32:37,421 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:32:37,429 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:32:37,430 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:32:37,437 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:32:37,437 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:32:37,439 INFO  L87              Difference]: Start difference. First operand 6570 states and 10964 transitions. Second operand  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:32:37,771 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:32:37,772 INFO  L93              Difference]: Finished difference Result 12242 states and 20433 transitions.
[2023-11-06 22:32:37,773 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:32:37,775 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 states have internal predecessors, (4260), 0 states have call successors, (0), 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 4260
[2023-11-06 22:32:37,777 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:32:37,793 INFO  L225             Difference]: With dead ends: 12242
[2023-11-06 22:32:37,793 INFO  L226             Difference]: Without dead ends: 6579
[2023-11-06 22:32:37,801 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4259 GetRequests, 4257 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:32:37,803 INFO  L413           NwaCegarLoop]: 9748 mSDtfsCounter, 12 mSDsluCounter, 19484 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29232 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 22:32:37,804 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 29232 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 22:32:37,817 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6579 states.
[2023-11-06 22:32:37,944 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6579 to 6571.
[2023-11-06 22:32:37,955 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6571 states, 6570 states have (on average 1.6689497716894977) internal successors, (10965), 6570 states have internal predecessors, (10965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:32:37,978 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6571 states to 6571 states and 10965 transitions.
[2023-11-06 22:32:37,978 INFO  L78                 Accepts]: Start accepts. Automaton has 6571 states and 10965 transitions. Word has length 4260
[2023-11-06 22:32:37,981 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:32:37,982 INFO  L495      AbstractCegarLoop]: Abstraction has 6571 states and 10965 transitions.
[2023-11-06 22:32:37,984 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:32:37,984 INFO  L276                IsEmpty]: Start isEmpty. Operand 6571 states and 10965 transitions.
[2023-11-06 22:32:38,242 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4261
[2023-11-06 22:32:38,243 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:32:38,246 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:32:38,297 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2023-11-06 22:32:38,455 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5
[2023-11-06 22:32:38,456 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:32:38,456 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:32:38,458 INFO  L85        PathProgramCache]: Analyzing trace with hash 1721378803, now seen corresponding path program 1 times
[2023-11-06 22:32:38,458 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:32:38,458 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937667852]
[2023-11-06 22:32:38,459 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:32:38,459 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:32:39,135 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:32:39,135 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424547241]
[2023-11-06 22:32:39,136 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:32:39,137 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:32:39,137 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:32:39,138 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:32:39,155 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-06 22:32:44,555 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:32:44,673 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17709 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:32:44,821 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:32:45,033 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:32:45,034 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:32:45,034 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:32:45,034 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937667852]
[2023-11-06 22:32:45,034 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:32:45,035 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424547241]
[2023-11-06 22:32:45,035 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424547241] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:32:45,035 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:32:45,037 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:32:45,037 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671501969]
[2023-11-06 22:32:45,037 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:32:45,045 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:32:45,045 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:32:45,052 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:32:45,053 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:32:45,055 INFO  L87              Difference]: Start difference. First operand 6571 states and 10965 transitions. Second operand  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:32:45,343 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:32:45,343 INFO  L93              Difference]: Finished difference Result 12244 states and 20435 transitions.
[2023-11-06 22:32:45,344 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:32:45,346 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 states have internal predecessors, (4260), 0 states have call successors, (0), 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 4260
[2023-11-06 22:32:45,348 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:32:45,362 INFO  L225             Difference]: With dead ends: 12244
[2023-11-06 22:32:45,362 INFO  L226             Difference]: Without dead ends: 6580
[2023-11-06 22:32:45,370 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4259 GetRequests, 4257 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:32:45,371 INFO  L413           NwaCegarLoop]: 9748 mSDtfsCounter, 12 mSDsluCounter, 19484 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29232 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:32:45,372 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 29232 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:32:45,385 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6580 states.
[2023-11-06 22:32:45,682 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6580 to 6572.
[2023-11-06 22:32:45,692 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6572 states, 6571 states have (on average 1.6688479683457618) internal successors, (10966), 6571 states have internal predecessors, (10966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:32:45,707 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6572 states to 6572 states and 10966 transitions.
[2023-11-06 22:32:45,707 INFO  L78                 Accepts]: Start accepts. Automaton has 6572 states and 10966 transitions. Word has length 4260
[2023-11-06 22:32:45,709 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:32:45,710 INFO  L495      AbstractCegarLoop]: Abstraction has 6572 states and 10966 transitions.
[2023-11-06 22:32:45,711 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:32:45,711 INFO  L276                IsEmpty]: Start isEmpty. Operand 6572 states and 10966 transitions.
[2023-11-06 22:32:45,844 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4261
[2023-11-06 22:32:45,844 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:32:45,847 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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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]
[2023-11-06 22:32:45,896 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2023-11-06 22:32:46,059 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6
[2023-11-06 22:32:46,060 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:32:46,060 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:32:46,062 INFO  L85        PathProgramCache]: Analyzing trace with hash -1926764863, now seen corresponding path program 1 times
[2023-11-06 22:32:46,062 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:32:46,062 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919206790]
[2023-11-06 22:32:46,063 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:32:46,063 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:32:46,443 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:32:46,444 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939930566]
[2023-11-06 22:32:46,445 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:32:46,445 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:32:46,445 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:32:46,462 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:32:46,468 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-06 22:32:51,703 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:32:51,817 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17710 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:32:51,912 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:32:52,080 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:32:52,081 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:32:52,081 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:32:52,081 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919206790]
[2023-11-06 22:32:52,081 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:32:52,081 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939930566]
[2023-11-06 22:32:52,082 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939930566] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:32:52,082 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:32:52,083 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:32:52,084 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005637942]
[2023-11-06 22:32:52,084 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:32:52,089 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:32:52,090 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:32:52,095 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:32:52,095 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:32:52,097 INFO  L87              Difference]: Start difference. First operand 6572 states and 10966 transitions. Second operand  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:32:52,312 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:32:52,312 INFO  L93              Difference]: Finished difference Result 12246 states and 20437 transitions.
[2023-11-06 22:32:52,313 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:32:52,314 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 states have internal predecessors, (4260), 0 states have call successors, (0), 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 4260
[2023-11-06 22:32:52,321 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:32:52,334 INFO  L225             Difference]: With dead ends: 12246
[2023-11-06 22:32:52,334 INFO  L226             Difference]: Without dead ends: 6581
[2023-11-06 22:32:52,342 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4259 GetRequests, 4257 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:32:52,343 INFO  L413           NwaCegarLoop]: 9748 mSDtfsCounter, 12 mSDsluCounter, 19484 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29232 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 22:32:52,344 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 29232 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 22:32:52,355 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6581 states.
[2023-11-06 22:32:52,459 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6581 to 6573.
[2023-11-06 22:32:52,469 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6573 states, 6572 states have (on average 1.668746195982958) internal successors, (10967), 6572 states have internal predecessors, (10967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:32:52,485 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6573 states to 6573 states and 10967 transitions.
[2023-11-06 22:32:52,486 INFO  L78                 Accepts]: Start accepts. Automaton has 6573 states and 10967 transitions. Word has length 4260
[2023-11-06 22:32:52,499 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:32:52,500 INFO  L495      AbstractCegarLoop]: Abstraction has 6573 states and 10967 transitions.
[2023-11-06 22:32:52,501 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:32:52,502 INFO  L276                IsEmpty]: Start isEmpty. Operand 6573 states and 10967 transitions.
[2023-11-06 22:32:52,644 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4261
[2023-11-06 22:32:52,644 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:32:52,648 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:32:52,711 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2023-11-06 22:32:52,870 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7
[2023-11-06 22:32:52,870 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:32:52,871 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:32:52,872 INFO  L85        PathProgramCache]: Analyzing trace with hash -1987294669, now seen corresponding path program 1 times
[2023-11-06 22:32:52,873 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:32:52,873 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576546623]
[2023-11-06 22:32:52,874 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:32:52,874 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:32:53,272 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:32:53,272 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2115306191]
[2023-11-06 22:32:53,274 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:32:53,274 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:32:53,274 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:32:53,276 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:32:53,299 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-06 22:32:58,356 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:32:58,477 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17711 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:32:58,547 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:32:58,728 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:32:58,728 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:32:58,729 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:32:58,729 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576546623]
[2023-11-06 22:32:58,729 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:32:58,729 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115306191]
[2023-11-06 22:32:58,729 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115306191] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:32:58,729 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:32:58,731 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:32:58,731 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475615571]
[2023-11-06 22:32:58,731 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:32:58,737 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:32:58,737 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:32:58,742 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:32:58,742 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:32:58,744 INFO  L87              Difference]: Start difference. First operand 6573 states and 10967 transitions. Second operand  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:32:58,969 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:32:58,970 INFO  L93              Difference]: Finished difference Result 12248 states and 20439 transitions.
[2023-11-06 22:32:58,970 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:32:58,972 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 states have internal predecessors, (4260), 0 states have call successors, (0), 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 4260
[2023-11-06 22:32:58,981 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:32:58,995 INFO  L225             Difference]: With dead ends: 12248
[2023-11-06 22:32:58,995 INFO  L226             Difference]: Without dead ends: 6582
[2023-11-06 22:32:59,003 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4259 GetRequests, 4257 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:32:59,004 INFO  L413           NwaCegarLoop]: 9748 mSDtfsCounter, 12 mSDsluCounter, 19484 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29232 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 22:32:59,005 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 29232 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 22:32:59,017 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6582 states.
[2023-11-06 22:32:59,120 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6582 to 6574.
[2023-11-06 22:32:59,130 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6574 states, 6573 states have (on average 1.6686444545869465) internal successors, (10968), 6573 states have internal predecessors, (10968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:32:59,145 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6574 states to 6574 states and 10968 transitions.
[2023-11-06 22:32:59,146 INFO  L78                 Accepts]: Start accepts. Automaton has 6574 states and 10968 transitions. Word has length 4260
[2023-11-06 22:32:59,153 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:32:59,153 INFO  L495      AbstractCegarLoop]: Abstraction has 6574 states and 10968 transitions.
[2023-11-06 22:32:59,155 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:32:59,156 INFO  L276                IsEmpty]: Start isEmpty. Operand 6574 states and 10968 transitions.
[2023-11-06 22:32:59,304 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4261
[2023-11-06 22:32:59,304 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:32:59,307 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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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]
[2023-11-06 22:32:59,376 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2023-11-06 22:32:59,527 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:32:59,528 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:32:59,528 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:32:59,530 INFO  L85        PathProgramCache]: Analyzing trace with hash 731622309, now seen corresponding path program 1 times
[2023-11-06 22:32:59,531 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:32:59,531 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630208367]
[2023-11-06 22:32:59,532 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:32:59,532 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:32:59,960 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:32:59,961 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [190976430]
[2023-11-06 22:32:59,962 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:32:59,962 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:32:59,963 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:32:59,967 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:32:59,968 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-06 22:33:05,211 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:33:05,337 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17712 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:33:05,423 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:33:05,866 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked.
[2023-11-06 22:33:05,866 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:33:05,866 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:33:05,866 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630208367]
[2023-11-06 22:33:05,867 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:33:05,867 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190976430]
[2023-11-06 22:33:05,867 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [190976430] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:33:05,867 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:33:05,868 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:33:05,871 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261159252]
[2023-11-06 22:33:05,871 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:33:05,876 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:33:05,876 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:33:05,881 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:33:05,881 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:33:05,883 INFO  L87              Difference]: Start difference. First operand 6574 states and 10968 transitions. Second operand  has 7 states, 7 states have (on average 539.8571428571429) internal successors, (3779), 7 states have internal predecessors, (3779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:33:06,532 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:33:06,532 INFO  L93              Difference]: Finished difference Result 17905 states and 29880 transitions.
[2023-11-06 22:33:06,533 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:33:06,534 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 539.8571428571429) internal successors, (3779), 7 states have internal predecessors, (3779), 0 states have call successors, (0), 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 4260
[2023-11-06 22:33:06,543 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:33:06,567 INFO  L225             Difference]: With dead ends: 17905
[2023-11-06 22:33:06,568 INFO  L226             Difference]: Without dead ends: 12238
[2023-11-06 22:33:06,576 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4269 GetRequests, 4257 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:33:06,577 INFO  L413           NwaCegarLoop]: 10950 mSDtfsCounter, 27308 mSDsluCounter, 42577 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27308 SdHoareTripleChecker+Valid, 53527 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:33:06,578 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27308 Valid, 53527 Invalid, 46 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:33:06,595 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12238 states.
[2023-11-06 22:33:06,723 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12238 to 6574.
[2023-11-06 22:33:06,731 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6574 states, 6573 states have (on average 1.6686444545869465) internal successors, (10968), 6573 states have internal predecessors, (10968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:33:06,745 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6574 states to 6574 states and 10968 transitions.
[2023-11-06 22:33:06,746 INFO  L78                 Accepts]: Start accepts. Automaton has 6574 states and 10968 transitions. Word has length 4260
[2023-11-06 22:33:06,754 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:33:06,755 INFO  L495      AbstractCegarLoop]: Abstraction has 6574 states and 10968 transitions.
[2023-11-06 22:33:06,756 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 539.8571428571429) internal successors, (3779), 7 states have internal predecessors, (3779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:33:06,756 INFO  L276                IsEmpty]: Start isEmpty. Operand 6574 states and 10968 transitions.
[2023-11-06 22:33:06,884 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4262
[2023-11-06 22:33:06,884 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:33:06,887 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:33:06,949 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2023-11-06 22:33:07,111 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:33:07,112 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:33:07,112 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:33:07,114 INFO  L85        PathProgramCache]: Analyzing trace with hash 1094752199, now seen corresponding path program 1 times
[2023-11-06 22:33:07,114 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:33:07,115 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748250791]
[2023-11-06 22:33:07,116 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:33:07,116 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:33:07,540 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:33:07,540 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2015250660]
[2023-11-06 22:33:07,542 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:33:07,542 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:33:07,542 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:33:07,543 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:33:07,549 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-11-06 22:33:12,687 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:33:12,806 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17715 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-06 22:33:12,886 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:33:13,267 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked.
[2023-11-06 22:33:13,267 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:33:13,267 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:33:13,267 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748250791]
[2023-11-06 22:33:13,267 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:33:13,268 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015250660]
[2023-11-06 22:33:13,268 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015250660] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:33:13,268 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:33:13,269 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-06 22:33:13,270 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916054650]
[2023-11-06 22:33:13,270 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:33:13,276 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-06 22:33:13,276 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:33:13,281 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-06 22:33:13,282 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-06 22:33:13,283 INFO  L87              Difference]: Start difference. First operand 6574 states and 10968 transitions. Second operand  has 8 states, 8 states have (on average 472.75) internal successors, (3782), 8 states have internal predecessors, (3782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:33:13,946 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:33:13,946 INFO  L93              Difference]: Finished difference Result 17907 states and 29882 transitions.
[2023-11-06 22:33:13,946 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:33:13,947 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 472.75) internal successors, (3782), 8 states have internal predecessors, (3782), 0 states have call successors, (0), 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 4261
[2023-11-06 22:33:13,953 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:33:13,977 INFO  L225             Difference]: With dead ends: 17907
[2023-11-06 22:33:13,978 INFO  L226             Difference]: Without dead ends: 12237
[2023-11-06 22:33:13,987 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4270 GetRequests, 4257 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210
[2023-11-06 22:33:13,988 INFO  L413           NwaCegarLoop]: 10945 mSDtfsCounter, 27307 mSDsluCounter, 53502 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27307 SdHoareTripleChecker+Valid, 64447 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:33:13,989 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27307 Valid, 64447 Invalid, 58 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:33:14,007 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12237 states.
[2023-11-06 22:33:14,127 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12237 to 6576.
[2023-11-06 22:33:14,135 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6576 states, 6575 states have (on average 1.6684410646387833) internal successors, (10970), 6575 states have internal predecessors, (10970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:33:14,148 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6576 states to 6576 states and 10970 transitions.
[2023-11-06 22:33:14,148 INFO  L78                 Accepts]: Start accepts. Automaton has 6576 states and 10970 transitions. Word has length 4261
[2023-11-06 22:33:14,151 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:33:14,152 INFO  L495      AbstractCegarLoop]: Abstraction has 6576 states and 10970 transitions.
[2023-11-06 22:33:14,153 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 472.75) internal successors, (3782), 8 states have internal predecessors, (3782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:33:14,153 INFO  L276                IsEmpty]: Start isEmpty. Operand 6576 states and 10970 transitions.
[2023-11-06 22:33:14,282 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4263
[2023-11-06 22:33:14,282 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:33:14,285 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:33:14,337 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0
[2023-11-06 22:33:14,511 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:33:14,512 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:33:14,515 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:33:14,517 INFO  L85        PathProgramCache]: Analyzing trace with hash -621219713, now seen corresponding path program 1 times
[2023-11-06 22:33:14,518 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:33:14,518 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229251500]
[2023-11-06 22:33:14,519 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:33:14,519 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:33:15,005 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:33:15,005 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194881001]
[2023-11-06 22:33:15,006 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:33:15,007 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:33:15,007 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:33:15,008 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:33:15,038 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-11-06 22:33:20,231 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:33:20,343 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17718 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:33:20,406 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:33:20,752 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked.
[2023-11-06 22:33:20,752 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:33:20,752 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:33:20,752 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229251500]
[2023-11-06 22:33:20,753 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:33:20,753 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194881001]
[2023-11-06 22:33:20,753 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [194881001] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:33:20,753 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:33:20,755 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:33:20,755 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461065970]
[2023-11-06 22:33:20,755 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:33:20,761 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:33:20,761 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:33:20,765 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:33:20,766 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:33:20,767 INFO  L87              Difference]: Start difference. First operand 6576 states and 10970 transitions. Second operand  has 7 states, 7 states have (on average 540.7142857142857) internal successors, (3785), 7 states have internal predecessors, (3785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:33:21,231 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:33:21,231 INFO  L93              Difference]: Finished difference Result 17913 states and 29888 transitions.
[2023-11-06 22:33:21,231 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:33:21,232 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 540.7142857142857) internal successors, (3785), 7 states have internal predecessors, (3785), 0 states have call successors, (0), 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 4262
[2023-11-06 22:33:21,239 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:33:21,264 INFO  L225             Difference]: With dead ends: 17913
[2023-11-06 22:33:21,265 INFO  L226             Difference]: Without dead ends: 12238
[2023-11-06 22:33:21,272 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4271 GetRequests, 4259 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:33:21,273 INFO  L413           NwaCegarLoop]: 10940 mSDtfsCounter, 27306 mSDsluCounter, 42546 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27306 SdHoareTripleChecker+Valid, 53486 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
[2023-11-06 22:33:21,274 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27306 Valid, 53486 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:33:21,291 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12238 states.
[2023-11-06 22:33:21,406 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12238 to 6578.
[2023-11-06 22:33:21,413 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6578 states, 6577 states have (on average 1.668237798388323) internal successors, (10972), 6577 states have internal predecessors, (10972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:33:21,428 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6578 states to 6578 states and 10972 transitions.
[2023-11-06 22:33:21,428 INFO  L78                 Accepts]: Start accepts. Automaton has 6578 states and 10972 transitions. Word has length 4262
[2023-11-06 22:33:21,431 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:33:21,432 INFO  L495      AbstractCegarLoop]: Abstraction has 6578 states and 10972 transitions.
[2023-11-06 22:33:21,433 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 540.7142857142857) internal successors, (3785), 7 states have internal predecessors, (3785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:33:21,433 INFO  L276                IsEmpty]: Start isEmpty. Operand 6578 states and 10972 transitions.
[2023-11-06 22:33:21,556 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4264
[2023-11-06 22:33:21,557 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:33:21,560 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:33:21,626 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0
[2023-11-06 22:33:21,786 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11
[2023-11-06 22:33:21,787 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:33:21,787 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:33:21,789 INFO  L85        PathProgramCache]: Analyzing trace with hash 1757016045, now seen corresponding path program 1 times
[2023-11-06 22:33:21,789 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:33:21,790 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234752130]
[2023-11-06 22:33:21,790 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:33:21,790 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:33:22,282 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:33:22,282 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [737265466]
[2023-11-06 22:33:22,283 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:33:22,284 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:33:22,284 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:33:22,285 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:33:22,317 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2023-11-06 22:33:27,573 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:33:27,694 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17721 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:33:27,757 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:33:28,098 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked.
[2023-11-06 22:33:28,098 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:33:28,099 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:33:28,099 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234752130]
[2023-11-06 22:33:28,099 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:33:28,099 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737265466]
[2023-11-06 22:33:28,099 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [737265466] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:33:28,099 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:33:28,101 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:33:28,101 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391442951]
[2023-11-06 22:33:28,101 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:33:28,107 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:33:28,107 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:33:28,112 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:33:28,112 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:33:28,114 INFO  L87              Difference]: Start difference. First operand 6578 states and 10972 transitions. Second operand  has 7 states, 7 states have (on average 541.1428571428571) internal successors, (3788), 7 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:33:28,558 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:33:28,558 INFO  L93              Difference]: Finished difference Result 17919 states and 29894 transitions.
[2023-11-06 22:33:28,559 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:33:28,560 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 541.1428571428571) internal successors, (3788), 7 states have internal predecessors, (3788), 0 states have call successors, (0), 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 4263
[2023-11-06 22:33:28,563 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:33:28,581 INFO  L225             Difference]: With dead ends: 17919
[2023-11-06 22:33:28,581 INFO  L226             Difference]: Without dead ends: 12239
[2023-11-06 22:33:28,589 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4272 GetRequests, 4260 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:33:28,590 INFO  L413           NwaCegarLoop]: 10935 mSDtfsCounter, 27305 mSDsluCounter, 42531 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27305 SdHoareTripleChecker+Valid, 53466 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
[2023-11-06 22:33:28,590 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27305 Valid, 53466 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:33:28,607 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12239 states.
[2023-11-06 22:33:28,709 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12239 to 6580.
[2023-11-06 22:33:28,716 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6580 states, 6579 states have (on average 1.6680346557227541) internal successors, (10974), 6579 states have internal predecessors, (10974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:33:28,729 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6580 states to 6580 states and 10974 transitions.
[2023-11-06 22:33:28,729 INFO  L78                 Accepts]: Start accepts. Automaton has 6580 states and 10974 transitions. Word has length 4263
[2023-11-06 22:33:28,732 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:33:28,732 INFO  L495      AbstractCegarLoop]: Abstraction has 6580 states and 10974 transitions.
[2023-11-06 22:33:28,734 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 541.1428571428571) internal successors, (3788), 7 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:33:28,734 INFO  L276                IsEmpty]: Start isEmpty. Operand 6580 states and 10974 transitions.
[2023-11-06 22:33:28,851 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4265
[2023-11-06 22:33:28,851 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:33:28,854 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:33:28,919 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0
[2023-11-06 22:33:29,063 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12
[2023-11-06 22:33:29,064 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:33:29,064 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:33:29,066 INFO  L85        PathProgramCache]: Analyzing trace with hash 1557989083, now seen corresponding path program 1 times
[2023-11-06 22:33:29,066 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:33:29,067 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762497746]
[2023-11-06 22:33:29,067 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:33:29,067 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:33:29,534 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:33:29,534 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [232543937]
[2023-11-06 22:33:29,536 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:33:29,536 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:33:29,536 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:33:29,537 INFO  L229       MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:33:29,570 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2023-11-06 22:33:34,563 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:33:34,676 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17725 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:33:34,745 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:33:35,083 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked.
[2023-11-06 22:33:35,083 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:33:35,083 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:33:35,083 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762497746]
[2023-11-06 22:33:35,084 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:33:35,084 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232543937]
[2023-11-06 22:33:35,084 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [232543937] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:33:35,084 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:33:35,086 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:33:35,086 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63907046]
[2023-11-06 22:33:35,086 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:33:35,093 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:33:35,093 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:33:35,098 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:33:35,098 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:33:35,100 INFO  L87              Difference]: Start difference. First operand 6580 states and 10974 transitions. Second operand  has 7 states, 7 states have (on average 541.5714285714286) internal successors, (3791), 7 states have internal predecessors, (3791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:33:35,541 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:33:35,541 INFO  L93              Difference]: Finished difference Result 17925 states and 29900 transitions.
[2023-11-06 22:33:35,542 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:33:35,543 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 541.5714285714286) internal successors, (3791), 7 states have internal predecessors, (3791), 0 states have call successors, (0), 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 4264
[2023-11-06 22:33:35,546 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:33:35,559 INFO  L225             Difference]: With dead ends: 17925
[2023-11-06 22:33:35,559 INFO  L226             Difference]: Without dead ends: 12240
[2023-11-06 22:33:35,567 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4273 GetRequests, 4261 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:33:35,568 INFO  L413           NwaCegarLoop]: 10930 mSDtfsCounter, 27304 mSDsluCounter, 42516 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27304 SdHoareTripleChecker+Valid, 53446 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
[2023-11-06 22:33:35,569 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27304 Valid, 53446 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:33:35,584 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12240 states.
[2023-11-06 22:33:35,682 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12240 to 6582.
[2023-11-06 22:33:35,689 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6582 states, 6581 states have (on average 1.6678316365294028) internal successors, (10976), 6581 states have internal predecessors, (10976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:33:35,702 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6582 states to 6582 states and 10976 transitions.
[2023-11-06 22:33:35,702 INFO  L78                 Accepts]: Start accepts. Automaton has 6582 states and 10976 transitions. Word has length 4264
[2023-11-06 22:33:35,705 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:33:35,705 INFO  L495      AbstractCegarLoop]: Abstraction has 6582 states and 10976 transitions.
[2023-11-06 22:33:35,706 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 541.5714285714286) internal successors, (3791), 7 states have internal predecessors, (3791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:33:35,707 INFO  L276                IsEmpty]: Start isEmpty. Operand 6582 states and 10976 transitions.
[2023-11-06 22:33:35,826 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4266
[2023-11-06 22:33:35,826 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:33:35,829 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:33:35,892 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0
[2023-11-06 22:33:36,051 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13
[2023-11-06 22:33:36,052 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:33:36,052 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:33:36,054 INFO  L85        PathProgramCache]: Analyzing trace with hash -755012203, now seen corresponding path program 1 times
[2023-11-06 22:33:36,054 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:33:36,055 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028135816]
[2023-11-06 22:33:36,055 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:33:36,056 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:33:36,466 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:33:36,467 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89973703]
[2023-11-06 22:33:36,468 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:33:36,468 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:33:36,468 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:33:36,469 INFO  L229       MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:33:36,487 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2023-11-06 22:33:41,453 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:33:41,563 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17728 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:33:41,619 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:33:41,919 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked.
[2023-11-06 22:33:41,919 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:33:41,919 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:33:41,920 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028135816]
[2023-11-06 22:33:41,920 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:33:41,920 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89973703]
[2023-11-06 22:33:41,920 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [89973703] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:33:41,920 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:33:41,922 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:33:41,922 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617327320]
[2023-11-06 22:33:41,922 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:33:41,927 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:33:41,928 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:33:41,932 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:33:41,932 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:33:41,934 INFO  L87              Difference]: Start difference. First operand 6582 states and 10976 transitions. Second operand  has 7 states, 7 states have (on average 542.0) internal successors, (3794), 7 states have internal predecessors, (3794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:33:42,381 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:33:42,381 INFO  L93              Difference]: Finished difference Result 17931 states and 29906 transitions.
[2023-11-06 22:33:42,382 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:33:42,383 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 542.0) internal successors, (3794), 7 states have internal predecessors, (3794), 0 states have call successors, (0), 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 4265
[2023-11-06 22:33:42,386 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:33:42,395 INFO  L225             Difference]: With dead ends: 17931
[2023-11-06 22:33:42,395 INFO  L226             Difference]: Without dead ends: 12241
[2023-11-06 22:33:42,403 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4274 GetRequests, 4262 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:33:42,403 INFO  L413           NwaCegarLoop]: 10925 mSDtfsCounter, 27303 mSDsluCounter, 42501 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27303 SdHoareTripleChecker+Valid, 53426 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
[2023-11-06 22:33:42,404 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27303 Valid, 53426 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:33:42,418 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12241 states.
[2023-11-06 22:33:42,525 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12241 to 6584.
[2023-11-06 22:33:42,532 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6584 states, 6583 states have (on average 1.6676287406957315) internal successors, (10978), 6583 states have internal predecessors, (10978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:33:42,544 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6584 states to 6584 states and 10978 transitions.
[2023-11-06 22:33:42,544 INFO  L78                 Accepts]: Start accepts. Automaton has 6584 states and 10978 transitions. Word has length 4265
[2023-11-06 22:33:42,546 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:33:42,546 INFO  L495      AbstractCegarLoop]: Abstraction has 6584 states and 10978 transitions.
[2023-11-06 22:33:42,547 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 542.0) internal successors, (3794), 7 states have internal predecessors, (3794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:33:42,547 INFO  L276                IsEmpty]: Start isEmpty. Operand 6584 states and 10978 transitions.
[2023-11-06 22:33:42,626 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4267
[2023-11-06 22:33:42,626 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:33:42,629 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:33:42,688 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0
[2023-11-06 22:33:42,855 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2023-11-06 22:33:42,856 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:33:42,856 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:33:42,857 INFO  L85        PathProgramCache]: Analyzing trace with hash -1256486987, now seen corresponding path program 1 times
[2023-11-06 22:33:42,858 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:33:42,858 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705533084]
[2023-11-06 22:33:42,859 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:33:42,859 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:33:43,209 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:33:43,209 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2126704137]
[2023-11-06 22:33:43,210 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:33:43,210 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:33:43,210 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:33:43,211 INFO  L229       MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:33:43,227 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2023-11-06 22:33:48,470 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:33:48,581 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17731 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-06 22:33:48,636 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:33:48,903 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked.
[2023-11-06 22:33:48,903 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:33:48,903 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:33:48,903 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705533084]
[2023-11-06 22:33:48,904 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:33:48,904 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126704137]
[2023-11-06 22:33:48,904 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126704137] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:33:48,904 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:33:48,905 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-06 22:33:48,905 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612253521]
[2023-11-06 22:33:48,906 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:33:48,911 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-06 22:33:48,911 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:33:48,916 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-06 22:33:48,916 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-06 22:33:48,918 INFO  L87              Difference]: Start difference. First operand 6584 states and 10978 transitions. Second operand  has 8 states, 8 states have (on average 474.625) internal successors, (3797), 8 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:33:49,407 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:33:49,407 INFO  L93              Difference]: Finished difference Result 17937 states and 29912 transitions.
[2023-11-06 22:33:49,407 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:33:49,408 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 474.625) internal successors, (3797), 8 states have internal predecessors, (3797), 0 states have call successors, (0), 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 4266
[2023-11-06 22:33:49,412 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:33:49,422 INFO  L225             Difference]: With dead ends: 17937
[2023-11-06 22:33:49,422 INFO  L226             Difference]: Without dead ends: 12242
[2023-11-06 22:33:49,427 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4275 GetRequests, 4262 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210
[2023-11-06 22:33:49,427 INFO  L413           NwaCegarLoop]: 10920 mSDtfsCounter, 27302 mSDsluCounter, 53402 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27302 SdHoareTripleChecker+Valid, 64322 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:33:49,428 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27302 Valid, 64322 Invalid, 58 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:33:49,439 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12242 states.
[2023-11-06 22:33:49,532 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12242 to 6586.
[2023-11-06 22:33:49,539 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6586 states, 6585 states have (on average 1.6674259681093395) internal successors, (10980), 6585 states have internal predecessors, (10980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:33:49,548 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6586 states to 6586 states and 10980 transitions.
[2023-11-06 22:33:49,549 INFO  L78                 Accepts]: Start accepts. Automaton has 6586 states and 10980 transitions. Word has length 4266
[2023-11-06 22:33:49,551 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:33:49,551 INFO  L495      AbstractCegarLoop]: Abstraction has 6586 states and 10980 transitions.
[2023-11-06 22:33:49,552 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 474.625) internal successors, (3797), 8 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:33:49,552 INFO  L276                IsEmpty]: Start isEmpty. Operand 6586 states and 10980 transitions.
[2023-11-06 22:33:49,632 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4268
[2023-11-06 22:33:49,632 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:33:49,634 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:33:49,704 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0
[2023-11-06 22:33:49,855 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2023-11-06 22:33:49,856 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:33:49,856 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:33:49,858 INFO  L85        PathProgramCache]: Analyzing trace with hash 2114611643, now seen corresponding path program 1 times
[2023-11-06 22:33:49,858 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:33:49,858 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745968089]
[2023-11-06 22:33:49,858 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:33:49,858 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:33:50,210 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:33:50,210 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386126598]
[2023-11-06 22:33:50,211 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:33:50,212 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:33:50,212 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:33:50,213 INFO  L229       MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:33:50,224 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2023-11-06 22:33:55,276 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:33:55,393 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17734 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:33:55,448 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:33:55,703 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked.
[2023-11-06 22:33:55,703 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:33:55,704 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:33:55,704 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745968089]
[2023-11-06 22:33:55,704 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:33:55,704 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386126598]
[2023-11-06 22:33:55,704 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [386126598] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:33:55,704 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:33:55,706 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:33:55,706 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594990449]
[2023-11-06 22:33:55,706 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:33:55,711 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:33:55,711 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:33:55,716 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:33:55,716 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:33:55,718 INFO  L87              Difference]: Start difference. First operand 6586 states and 10980 transitions. Second operand  has 7 states, 7 states have (on average 542.8571428571429) internal successors, (3800), 7 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:33:56,129 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:33:56,130 INFO  L93              Difference]: Finished difference Result 17943 states and 29918 transitions.
[2023-11-06 22:33:56,130 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:33:56,131 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 542.8571428571429) internal successors, (3800), 7 states have internal predecessors, (3800), 0 states have call successors, (0), 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 4267
[2023-11-06 22:33:56,135 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:33:56,145 INFO  L225             Difference]: With dead ends: 17943
[2023-11-06 22:33:56,145 INFO  L226             Difference]: Without dead ends: 12243
[2023-11-06 22:33:56,150 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4276 GetRequests, 4264 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:33:56,151 INFO  L413           NwaCegarLoop]: 10915 mSDtfsCounter, 27301 mSDsluCounter, 42471 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27301 SdHoareTripleChecker+Valid, 53386 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
[2023-11-06 22:33:56,151 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27301 Valid, 53386 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:33:56,162 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12243 states.
[2023-11-06 22:33:56,241 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12243 to 6588.
[2023-11-06 22:33:56,248 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6588 states, 6587 states have (on average 1.6672233186579626) internal successors, (10982), 6587 states have internal predecessors, (10982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:33:56,261 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6588 states to 6588 states and 10982 transitions.
[2023-11-06 22:33:56,261 INFO  L78                 Accepts]: Start accepts. Automaton has 6588 states and 10982 transitions. Word has length 4267
[2023-11-06 22:33:56,264 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:33:56,264 INFO  L495      AbstractCegarLoop]: Abstraction has 6588 states and 10982 transitions.
[2023-11-06 22:33:56,265 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 542.8571428571429) internal successors, (3800), 7 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:33:56,266 INFO  L276                IsEmpty]: Start isEmpty. Operand 6588 states and 10982 transitions.
[2023-11-06 22:33:56,373 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4269
[2023-11-06 22:33:56,374 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:33:56,375 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:33:56,428 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0
[2023-11-06 22:33:56,576 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16
[2023-11-06 22:33:56,576 INFO  L420      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:33:56,576 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:33:56,577 INFO  L85        PathProgramCache]: Analyzing trace with hash -409475311, now seen corresponding path program 1 times
[2023-11-06 22:33:56,578 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:33:56,578 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198833331]
[2023-11-06 22:33:56,578 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:33:56,579 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:33:56,905 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:33:56,905 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899094093]
[2023-11-06 22:33:56,906 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:33:56,906 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:33:56,906 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:33:56,907 INFO  L229       MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:33:56,908 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process
[2023-11-06 22:34:02,029 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:34:02,150 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17738 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:34:02,206 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:34:02,478 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked.
[2023-11-06 22:34:02,479 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:34:02,479 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:34:02,479 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198833331]
[2023-11-06 22:34:02,479 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:34:02,480 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899094093]
[2023-11-06 22:34:02,480 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899094093] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:34:02,480 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:34:02,481 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:34:02,482 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336704945]
[2023-11-06 22:34:02,482 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:34:02,485 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:34:02,486 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:34:02,490 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:34:02,491 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:34:02,492 INFO  L87              Difference]: Start difference. First operand 6588 states and 10982 transitions. Second operand  has 7 states, 7 states have (on average 543.2857142857143) internal successors, (3803), 7 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:34:02,909 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:34:02,909 INFO  L93              Difference]: Finished difference Result 17949 states and 29924 transitions.
[2023-11-06 22:34:02,910 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:34:02,911 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 543.2857142857143) internal successors, (3803), 7 states have internal predecessors, (3803), 0 states have call successors, (0), 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 4268
[2023-11-06 22:34:02,915 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:34:02,925 INFO  L225             Difference]: With dead ends: 17949
[2023-11-06 22:34:02,925 INFO  L226             Difference]: Without dead ends: 12244
[2023-11-06 22:34:02,930 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4277 GetRequests, 4265 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:34:02,931 INFO  L413           NwaCegarLoop]: 10910 mSDtfsCounter, 27300 mSDsluCounter, 42456 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27300 SdHoareTripleChecker+Valid, 53366 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
[2023-11-06 22:34:02,931 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27300 Valid, 53366 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:34:02,946 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12244 states.
[2023-11-06 22:34:03,021 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12244 to 6590.
[2023-11-06 22:34:03,026 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6590 states, 6589 states have (on average 1.6670207922294733) internal successors, (10984), 6589 states have internal predecessors, (10984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:34:03,035 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6590 states to 6590 states and 10984 transitions.
[2023-11-06 22:34:03,036 INFO  L78                 Accepts]: Start accepts. Automaton has 6590 states and 10984 transitions. Word has length 4268
[2023-11-06 22:34:03,037 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:34:03,038 INFO  L495      AbstractCegarLoop]: Abstraction has 6590 states and 10984 transitions.
[2023-11-06 22:34:03,038 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 543.2857142857143) internal successors, (3803), 7 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:34:03,039 INFO  L276                IsEmpty]: Start isEmpty. Operand 6590 states and 10984 transitions.
[2023-11-06 22:34:03,116 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4270
[2023-11-06 22:34:03,117 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:34:03,118 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:34:03,165 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0
[2023-11-06 22:34:03,318 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17
[2023-11-06 22:34:03,319 INFO  L420      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:34:03,319 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:34:03,320 INFO  L85        PathProgramCache]: Analyzing trace with hash 1516509283, now seen corresponding path program 1 times
[2023-11-06 22:34:03,320 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:34:03,320 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900715437]
[2023-11-06 22:34:03,320 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:03,320 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:34:03,675 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:34:03,675 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [819131267]
[2023-11-06 22:34:03,676 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:03,677 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:34:03,677 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:34:03,681 INFO  L229       MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:34:03,682 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process
[2023-11-06 22:34:08,901 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:34:09,016 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17741 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-06 22:34:09,062 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:34:09,328 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked.
[2023-11-06 22:34:09,328 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:34:09,328 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:34:09,329 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900715437]
[2023-11-06 22:34:09,329 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:34:09,329 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819131267]
[2023-11-06 22:34:09,329 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [819131267] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:34:09,329 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:34:09,331 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-06 22:34:09,331 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576247808]
[2023-11-06 22:34:09,331 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:34:09,334 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-06 22:34:09,335 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:34:09,339 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-06 22:34:09,339 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-06 22:34:09,340 INFO  L87              Difference]: Start difference. First operand 6590 states and 10984 transitions. Second operand  has 8 states, 8 states have (on average 475.75) internal successors, (3806), 8 states have internal predecessors, (3806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:34:09,799 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:34:09,800 INFO  L93              Difference]: Finished difference Result 17955 states and 29930 transitions.
[2023-11-06 22:34:09,800 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:34:09,801 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 475.75) internal successors, (3806), 8 states have internal predecessors, (3806), 0 states have call successors, (0), 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 4269
[2023-11-06 22:34:09,804 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:34:09,814 INFO  L225             Difference]: With dead ends: 17955
[2023-11-06 22:34:09,814 INFO  L226             Difference]: Without dead ends: 12245
[2023-11-06 22:34:09,819 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4278 GetRequests, 4265 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210
[2023-11-06 22:34:09,820 INFO  L413           NwaCegarLoop]: 10905 mSDtfsCounter, 27299 mSDsluCounter, 51850 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27299 SdHoareTripleChecker+Valid, 62755 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:34:09,820 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27299 Valid, 62755 Invalid, 53 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:34:09,832 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12245 states.
[2023-11-06 22:34:09,917 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12245 to 6592.
[2023-11-06 22:34:09,923 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6592 states, 6591 states have (on average 1.66681838871188) internal successors, (10986), 6591 states have internal predecessors, (10986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:34:09,932 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6592 states to 6592 states and 10986 transitions.
[2023-11-06 22:34:09,932 INFO  L78                 Accepts]: Start accepts. Automaton has 6592 states and 10986 transitions. Word has length 4269
[2023-11-06 22:34:09,934 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:34:09,934 INFO  L495      AbstractCegarLoop]: Abstraction has 6592 states and 10986 transitions.
[2023-11-06 22:34:09,935 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 475.75) internal successors, (3806), 8 states have internal predecessors, (3806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:34:09,935 INFO  L276                IsEmpty]: Start isEmpty. Operand 6592 states and 10986 transitions.
[2023-11-06 22:34:10,047 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4271
[2023-11-06 22:34:10,047 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:34:10,048 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:34:10,098 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0
[2023-11-06 22:34:10,249 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:34:10,249 INFO  L420      AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:34:10,250 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:34:10,251 INFO  L85        PathProgramCache]: Analyzing trace with hash 1839997931, now seen corresponding path program 1 times
[2023-11-06 22:34:10,251 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:34:10,252 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495638447]
[2023-11-06 22:34:10,253 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:10,253 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:34:10,640 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:34:10,640 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707676078]
[2023-11-06 22:34:10,641 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:10,641 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:34:10,641 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:34:10,642 INFO  L229       MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:34:10,643 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process
[2023-11-06 22:34:15,699 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:34:15,818 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17744 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:34:15,866 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:34:16,110 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked.
[2023-11-06 22:34:16,110 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:34:16,110 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:34:16,111 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495638447]
[2023-11-06 22:34:16,111 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:34:16,111 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707676078]
[2023-11-06 22:34:16,111 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [707676078] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:34:16,111 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:34:16,112 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:34:16,112 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272306396]
[2023-11-06 22:34:16,113 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:34:16,115 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:34:16,115 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:34:16,117 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:34:16,117 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:34:16,119 INFO  L87              Difference]: Start difference. First operand 6592 states and 10986 transitions. Second operand  has 7 states, 7 states have (on average 544.1428571428571) internal successors, (3809), 7 states have internal predecessors, (3809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:34:16,540 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:34:16,540 INFO  L93              Difference]: Finished difference Result 17961 states and 29936 transitions.
[2023-11-06 22:34:16,540 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:34:16,541 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 544.1428571428571) internal successors, (3809), 7 states have internal predecessors, (3809), 0 states have call successors, (0), 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 4270
[2023-11-06 22:34:16,545 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:34:16,559 INFO  L225             Difference]: With dead ends: 17961
[2023-11-06 22:34:16,559 INFO  L226             Difference]: Without dead ends: 12246
[2023-11-06 22:34:16,567 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4279 GetRequests, 4267 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:34:16,568 INFO  L413           NwaCegarLoop]: 10900 mSDtfsCounter, 27298 mSDsluCounter, 42426 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27298 SdHoareTripleChecker+Valid, 53326 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
[2023-11-06 22:34:16,568 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27298 Valid, 53326 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:34:16,583 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12246 states.
[2023-11-06 22:34:16,659 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12246 to 6594.
[2023-11-06 22:34:16,665 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6594 states, 6593 states have (on average 1.6666161079933262) internal successors, (10988), 6593 states have internal predecessors, (10988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:34:16,674 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6594 states to 6594 states and 10988 transitions.
[2023-11-06 22:34:16,675 INFO  L78                 Accepts]: Start accepts. Automaton has 6594 states and 10988 transitions. Word has length 4270
[2023-11-06 22:34:16,677 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:34:16,677 INFO  L495      AbstractCegarLoop]: Abstraction has 6594 states and 10988 transitions.
[2023-11-06 22:34:16,678 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 544.1428571428571) internal successors, (3809), 7 states have internal predecessors, (3809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:34:16,678 INFO  L276                IsEmpty]: Start isEmpty. Operand 6594 states and 10988 transitions.
[2023-11-06 22:34:16,760 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4272
[2023-11-06 22:34:16,760 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:34:16,761 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:34:16,811 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0
[2023-11-06 22:34:16,962 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:34:16,962 INFO  L420      AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:34:16,963 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:34:16,963 INFO  L85        PathProgramCache]: Analyzing trace with hash -1400096631, now seen corresponding path program 1 times
[2023-11-06 22:34:16,964 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:34:16,964 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675037699]
[2023-11-06 22:34:16,964 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:16,964 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:34:17,290 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:34:17,290 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252010901]
[2023-11-06 22:34:17,291 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:17,291 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:34:17,292 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:34:17,292 INFO  L229       MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:34:17,294 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process
[2023-11-06 22:34:22,322 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:34:22,440 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17747 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:34:22,487 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:34:22,753 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked.
[2023-11-06 22:34:22,753 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:34:22,753 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:34:22,754 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675037699]
[2023-11-06 22:34:22,754 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:34:22,754 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252010901]
[2023-11-06 22:34:22,754 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252010901] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:34:22,754 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:34:22,755 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:34:22,756 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965692108]
[2023-11-06 22:34:22,756 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:34:22,758 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:34:22,758 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:34:22,760 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:34:22,760 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:34:22,762 INFO  L87              Difference]: Start difference. First operand 6594 states and 10988 transitions. Second operand  has 7 states, 7 states have (on average 544.5714285714286) internal successors, (3812), 7 states have internal predecessors, (3812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:34:23,173 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:34:23,173 INFO  L93              Difference]: Finished difference Result 17967 states and 29942 transitions.
[2023-11-06 22:34:23,174 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:34:23,175 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 544.5714285714286) internal successors, (3812), 7 states have internal predecessors, (3812), 0 states have call successors, (0), 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 4271
[2023-11-06 22:34:23,178 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:34:23,187 INFO  L225             Difference]: With dead ends: 17967
[2023-11-06 22:34:23,187 INFO  L226             Difference]: Without dead ends: 12247
[2023-11-06 22:34:23,192 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4280 GetRequests, 4268 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:34:23,193 INFO  L413           NwaCegarLoop]: 10895 mSDtfsCounter, 27297 mSDsluCounter, 42411 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27297 SdHoareTripleChecker+Valid, 53306 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
[2023-11-06 22:34:23,194 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27297 Valid, 53306 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:34:23,206 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12247 states.
[2023-11-06 22:34:23,313 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12247 to 6596.
[2023-11-06 22:34:23,320 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6596 states, 6595 states have (on average 1.6664139499620925) internal successors, (10990), 6595 states have internal predecessors, (10990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:34:23,331 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6596 states to 6596 states and 10990 transitions.
[2023-11-06 22:34:23,331 INFO  L78                 Accepts]: Start accepts. Automaton has 6596 states and 10990 transitions. Word has length 4271
[2023-11-06 22:34:23,333 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:34:23,333 INFO  L495      AbstractCegarLoop]: Abstraction has 6596 states and 10990 transitions.
[2023-11-06 22:34:23,334 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 544.5714285714286) internal successors, (3812), 7 states have internal predecessors, (3812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:34:23,334 INFO  L276                IsEmpty]: Start isEmpty. Operand 6596 states and 10990 transitions.
[2023-11-06 22:34:23,413 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4273
[2023-11-06 22:34:23,413 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:34:23,414 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:34:23,467 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0
[2023-11-06 22:34:23,615 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20
[2023-11-06 22:34:23,615 INFO  L420      AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:34:23,615 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:34:23,617 INFO  L85        PathProgramCache]: Analyzing trace with hash 552193095, now seen corresponding path program 1 times
[2023-11-06 22:34:23,617 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:34:23,617 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744481355]
[2023-11-06 22:34:23,617 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:23,618 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:34:23,967 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:34:23,967 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728099510]
[2023-11-06 22:34:23,968 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:23,968 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:34:23,968 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:34:23,969 INFO  L229       MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:34:23,970 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process
[2023-11-06 22:34:29,038 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:34:29,150 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17751 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:34:29,194 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:34:29,443 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked.
[2023-11-06 22:34:29,443 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:34:29,443 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:34:29,443 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744481355]
[2023-11-06 22:34:29,443 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:34:29,443 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728099510]
[2023-11-06 22:34:29,443 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [728099510] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:34:29,443 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:34:29,445 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:34:29,445 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575025139]
[2023-11-06 22:34:29,445 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:34:29,448 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:34:29,448 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:34:29,450 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:34:29,451 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:34:29,452 INFO  L87              Difference]: Start difference. First operand 6596 states and 10990 transitions. Second operand  has 7 states, 7 states have (on average 545.0) internal successors, (3815), 7 states have internal predecessors, (3815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:34:29,841 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:34:29,841 INFO  L93              Difference]: Finished difference Result 17973 states and 29948 transitions.
[2023-11-06 22:34:29,844 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:34:29,845 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 545.0) internal successors, (3815), 7 states have internal predecessors, (3815), 0 states have call successors, (0), 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 4272
[2023-11-06 22:34:29,848 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:34:29,858 INFO  L225             Difference]: With dead ends: 17973
[2023-11-06 22:34:29,858 INFO  L226             Difference]: Without dead ends: 12248
[2023-11-06 22:34:29,863 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4281 GetRequests, 4269 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:34:29,863 INFO  L413           NwaCegarLoop]: 10890 mSDtfsCounter, 27296 mSDsluCounter, 42396 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27296 SdHoareTripleChecker+Valid, 53286 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
[2023-11-06 22:34:29,864 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27296 Valid, 53286 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:34:29,875 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12248 states.
[2023-11-06 22:34:29,952 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12248 to 6598.
[2023-11-06 22:34:29,957 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6598 states, 6597 states have (on average 1.666211914506594) internal successors, (10992), 6597 states have internal predecessors, (10992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:34:29,965 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6598 states to 6598 states and 10992 transitions.
[2023-11-06 22:34:29,965 INFO  L78                 Accepts]: Start accepts. Automaton has 6598 states and 10992 transitions. Word has length 4272
[2023-11-06 22:34:29,967 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:34:29,967 INFO  L495      AbstractCegarLoop]: Abstraction has 6598 states and 10992 transitions.
[2023-11-06 22:34:29,968 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 545.0) internal successors, (3815), 7 states have internal predecessors, (3815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:34:29,968 INFO  L276                IsEmpty]: Start isEmpty. Operand 6598 states and 10992 transitions.
[2023-11-06 22:34:30,055 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4274
[2023-11-06 22:34:30,055 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:34:30,056 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:34:30,105 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0
[2023-11-06 22:34:30,256 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:34:30,257 INFO  L420      AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:34:30,257 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:34:30,258 INFO  L85        PathProgramCache]: Analyzing trace with hash -474343375, now seen corresponding path program 1 times
[2023-11-06 22:34:30,258 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:34:30,258 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861345845]
[2023-11-06 22:34:30,259 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:30,259 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:34:30,579 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:34:30,579 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342560575]
[2023-11-06 22:34:30,580 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:30,580 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:34:30,580 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:34:30,581 INFO  L229       MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:34:30,582 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process
[2023-11-06 22:34:35,713 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:34:35,831 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17754 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:34:35,877 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:34:36,156 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked.
[2023-11-06 22:34:36,156 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:34:36,157 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:34:36,157 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861345845]
[2023-11-06 22:34:36,157 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:34:36,157 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342560575]
[2023-11-06 22:34:36,157 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342560575] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:34:36,157 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:34:36,158 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:34:36,159 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001575427]
[2023-11-06 22:34:36,159 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:34:36,162 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:34:36,162 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:34:36,165 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:34:36,165 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:34:36,166 INFO  L87              Difference]: Start difference. First operand 6598 states and 10992 transitions. Second operand  has 7 states, 7 states have (on average 545.4285714285714) internal successors, (3818), 7 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:34:36,574 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:34:36,574 INFO  L93              Difference]: Finished difference Result 17979 states and 29954 transitions.
[2023-11-06 22:34:36,575 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:34:36,576 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 545.4285714285714) internal successors, (3818), 7 states have internal predecessors, (3818), 0 states have call successors, (0), 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 4273
[2023-11-06 22:34:36,579 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:34:36,588 INFO  L225             Difference]: With dead ends: 17979
[2023-11-06 22:34:36,589 INFO  L226             Difference]: Without dead ends: 12249
[2023-11-06 22:34:36,593 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4282 GetRequests, 4270 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:34:36,594 INFO  L413           NwaCegarLoop]: 10885 mSDtfsCounter, 27295 mSDsluCounter, 42381 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27295 SdHoareTripleChecker+Valid, 53266 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
[2023-11-06 22:34:36,594 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27295 Valid, 53266 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:34:36,605 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12249 states.
[2023-11-06 22:34:36,673 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12249 to 6600.
[2023-11-06 22:34:36,679 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6600 states, 6599 states have (on average 1.6660100015153811) internal successors, (10994), 6599 states have internal predecessors, (10994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:34:36,687 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6600 states to 6600 states and 10994 transitions.
[2023-11-06 22:34:36,688 INFO  L78                 Accepts]: Start accepts. Automaton has 6600 states and 10994 transitions. Word has length 4273
[2023-11-06 22:34:36,689 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:34:36,690 INFO  L495      AbstractCegarLoop]: Abstraction has 6600 states and 10994 transitions.
[2023-11-06 22:34:36,690 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 545.4285714285714) internal successors, (3818), 7 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:34:36,691 INFO  L276                IsEmpty]: Start isEmpty. Operand 6600 states and 10994 transitions.
[2023-11-06 22:34:36,768 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4275
[2023-11-06 22:34:36,768 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:34:36,769 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:34:36,820 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0
[2023-11-06 22:34:36,970 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:34:36,970 INFO  L420      AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:34:36,971 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:34:36,972 INFO  L85        PathProgramCache]: Analyzing trace with hash -204978911, now seen corresponding path program 1 times
[2023-11-06 22:34:36,972 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:34:36,972 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442238969]
[2023-11-06 22:34:36,973 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:36,973 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:34:37,291 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:34:37,292 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423001429]
[2023-11-06 22:34:37,293 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:37,293 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:34:37,293 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:34:37,294 INFO  L229       MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:34:37,295 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process
[2023-11-06 22:34:42,327 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:34:42,450 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17757 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-06 22:34:42,498 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:34:42,754 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked.
[2023-11-06 22:34:42,755 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:34:42,755 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:34:42,755 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442238969]
[2023-11-06 22:34:42,755 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:34:42,755 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423001429]
[2023-11-06 22:34:42,756 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [423001429] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:34:42,756 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:34:42,757 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-06 22:34:42,758 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321957178]
[2023-11-06 22:34:42,758 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:34:42,761 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-06 22:34:42,761 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:34:42,765 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-06 22:34:42,765 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-06 22:34:42,767 INFO  L87              Difference]: Start difference. First operand 6600 states and 10994 transitions. Second operand  has 8 states, 8 states have (on average 477.625) internal successors, (3821), 8 states have internal predecessors, (3821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:34:43,250 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:34:43,250 INFO  L93              Difference]: Finished difference Result 17985 states and 29960 transitions.
[2023-11-06 22:34:43,250 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:34:43,251 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 477.625) internal successors, (3821), 8 states have internal predecessors, (3821), 0 states have call successors, (0), 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 4274
[2023-11-06 22:34:43,254 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:34:43,264 INFO  L225             Difference]: With dead ends: 17985
[2023-11-06 22:34:43,265 INFO  L226             Difference]: Without dead ends: 12250
[2023-11-06 22:34:43,269 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4283 GetRequests, 4270 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210
[2023-11-06 22:34:43,270 INFO  L413           NwaCegarLoop]: 10880 mSDtfsCounter, 27294 mSDsluCounter, 53242 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27294 SdHoareTripleChecker+Valid, 64122 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:34:43,270 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27294 Valid, 64122 Invalid, 58 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:34:43,283 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12250 states.
[2023-11-06 22:34:43,356 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12250 to 6602.
[2023-11-06 22:34:43,361 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6602 states, 6601 states have (on average 1.66580821087714) internal successors, (10996), 6601 states have internal predecessors, (10996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:34:43,371 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6602 states to 6602 states and 10996 transitions.
[2023-11-06 22:34:43,371 INFO  L78                 Accepts]: Start accepts. Automaton has 6602 states and 10996 transitions. Word has length 4274
[2023-11-06 22:34:43,373 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:34:43,373 INFO  L495      AbstractCegarLoop]: Abstraction has 6602 states and 10996 transitions.
[2023-11-06 22:34:43,374 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 477.625) internal successors, (3821), 8 states have internal predecessors, (3821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:34:43,374 INFO  L276                IsEmpty]: Start isEmpty. Operand 6602 states and 10996 transitions.
[2023-11-06 22:34:43,452 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4276
[2023-11-06 22:34:43,452 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:34:43,453 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:34:43,509 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0
[2023-11-06 22:34:43,667 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:34:43,667 INFO  L420      AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:34:43,667 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:34:43,669 INFO  L85        PathProgramCache]: Analyzing trace with hash 1049287767, now seen corresponding path program 1 times
[2023-11-06 22:34:43,669 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:34:43,669 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372956436]
[2023-11-06 22:34:43,670 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:43,670 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:34:43,989 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:34:43,989 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912940879]
[2023-11-06 22:34:43,990 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:43,990 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:34:43,990 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:34:43,991 INFO  L229       MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:34:43,992 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process
[2023-11-06 22:34:49,043 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:34:49,153 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17760 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:34:49,196 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:34:49,443 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked.
[2023-11-06 22:34:49,443 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:34:49,443 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:34:49,443 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372956436]
[2023-11-06 22:34:49,443 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:34:49,444 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912940879]
[2023-11-06 22:34:49,444 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [912940879] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:34:49,444 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:34:49,445 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:34:49,445 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567324865]
[2023-11-06 22:34:49,446 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:34:49,448 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:34:49,448 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:34:49,452 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:34:49,452 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:34:49,453 INFO  L87              Difference]: Start difference. First operand 6602 states and 10996 transitions. Second operand  has 7 states, 7 states have (on average 546.2857142857143) internal successors, (3824), 7 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:34:49,847 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:34:49,847 INFO  L93              Difference]: Finished difference Result 17991 states and 29966 transitions.
[2023-11-06 22:34:49,847 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:34:49,848 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 546.2857142857143) internal successors, (3824), 7 states have internal predecessors, (3824), 0 states have call successors, (0), 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 4275
[2023-11-06 22:34:49,851 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:34:49,861 INFO  L225             Difference]: With dead ends: 17991
[2023-11-06 22:34:49,861 INFO  L226             Difference]: Without dead ends: 12251
[2023-11-06 22:34:49,866 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4284 GetRequests, 4272 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:34:49,867 INFO  L413           NwaCegarLoop]: 10875 mSDtfsCounter, 27293 mSDsluCounter, 42351 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27293 SdHoareTripleChecker+Valid, 53226 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
[2023-11-06 22:34:49,867 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27293 Valid, 53226 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:34:49,881 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12251 states.
[2023-11-06 22:34:49,957 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12251 to 6604.
[2023-11-06 22:34:49,964 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6604 states, 6603 states have (on average 1.6656065424806905) internal successors, (10998), 6603 states have internal predecessors, (10998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:34:49,975 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6604 states to 6604 states and 10998 transitions.
[2023-11-06 22:34:49,975 INFO  L78                 Accepts]: Start accepts. Automaton has 6604 states and 10998 transitions. Word has length 4275
[2023-11-06 22:34:49,978 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:34:49,978 INFO  L495      AbstractCegarLoop]: Abstraction has 6604 states and 10998 transitions.
[2023-11-06 22:34:49,979 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 546.2857142857143) internal successors, (3824), 7 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:34:49,980 INFO  L276                IsEmpty]: Start isEmpty. Operand 6604 states and 10998 transitions.
[2023-11-06 22:34:50,060 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4277
[2023-11-06 22:34:50,061 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:34:50,062 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:34:50,118 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0
[2023-11-06 22:34:50,287 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:34:50,288 INFO  L420      AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:34:50,288 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:34:50,289 INFO  L85        PathProgramCache]: Analyzing trace with hash -1221577091, now seen corresponding path program 1 times
[2023-11-06 22:34:50,289 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:34:50,290 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349672084]
[2023-11-06 22:34:50,290 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:50,290 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:34:50,617 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:34:50,617 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289254142]
[2023-11-06 22:34:50,618 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:50,618 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:34:50,618 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:34:50,619 INFO  L229       MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:34:50,620 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process
[2023-11-06 22:34:55,769 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:34:55,877 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17764 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:34:55,921 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:34:56,154 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked.
[2023-11-06 22:34:56,154 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:34:56,154 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:34:56,154 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349672084]
[2023-11-06 22:34:56,155 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:34:56,155 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289254142]
[2023-11-06 22:34:56,155 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [289254142] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:34:56,155 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:34:56,157 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:34:56,157 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64259625]
[2023-11-06 22:34:56,157 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:34:56,160 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:34:56,160 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:34:56,164 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:34:56,164 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:34:56,166 INFO  L87              Difference]: Start difference. First operand 6604 states and 10998 transitions. Second operand  has 7 states, 7 states have (on average 546.7142857142857) internal successors, (3827), 7 states have internal predecessors, (3827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:34:56,579 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:34:56,579 INFO  L93              Difference]: Finished difference Result 17997 states and 29972 transitions.
[2023-11-06 22:34:56,580 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:34:56,580 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 546.7142857142857) internal successors, (3827), 7 states have internal predecessors, (3827), 0 states have call successors, (0), 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 4276
[2023-11-06 22:34:56,583 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:34:56,593 INFO  L225             Difference]: With dead ends: 17997
[2023-11-06 22:34:56,593 INFO  L226             Difference]: Without dead ends: 12252
[2023-11-06 22:34:56,598 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4285 GetRequests, 4273 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:34:56,598 INFO  L413           NwaCegarLoop]: 10870 mSDtfsCounter, 27292 mSDsluCounter, 42336 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27292 SdHoareTripleChecker+Valid, 53206 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
[2023-11-06 22:34:56,599 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27292 Valid, 53206 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:34:56,610 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12252 states.
[2023-11-06 22:34:56,675 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12252 to 6606.
[2023-11-06 22:34:56,680 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6606 states, 6605 states have (on average 1.6654049962149886) internal successors, (11000), 6605 states have internal predecessors, (11000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:34:56,689 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6606 states to 6606 states and 11000 transitions.
[2023-11-06 22:34:56,689 INFO  L78                 Accepts]: Start accepts. Automaton has 6606 states and 11000 transitions. Word has length 4276
[2023-11-06 22:34:56,691 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:34:56,691 INFO  L495      AbstractCegarLoop]: Abstraction has 6606 states and 11000 transitions.
[2023-11-06 22:34:56,692 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 546.7142857142857) internal successors, (3827), 7 states have internal predecessors, (3827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:34:56,692 INFO  L276                IsEmpty]: Start isEmpty. Operand 6606 states and 11000 transitions.
[2023-11-06 22:34:56,769 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4278
[2023-11-06 22:34:56,769 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:34:56,770 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:34:56,819 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0
[2023-11-06 22:34:56,987 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25
[2023-11-06 22:34:56,988 INFO  L420      AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:34:56,988 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:34:56,989 INFO  L85        PathProgramCache]: Analyzing trace with hash 2089610495, now seen corresponding path program 1 times
[2023-11-06 22:34:56,989 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:34:56,989 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753047101]
[2023-11-06 22:34:56,990 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:56,990 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:34:57,308 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:34:57,308 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1846418455]
[2023-11-06 22:34:57,309 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:34:57,309 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:34:57,309 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:34:57,310 INFO  L229       MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:34:57,311 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process
[2023-11-06 22:35:02,251 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:35:02,354 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17767 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:35:02,407 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:35:02,676 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked.
[2023-11-06 22:35:02,676 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:35:02,677 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:35:02,677 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753047101]
[2023-11-06 22:35:02,677 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:35:02,677 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846418455]
[2023-11-06 22:35:02,677 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846418455] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:35:02,678 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:35:02,679 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:35:02,679 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851956522]
[2023-11-06 22:35:02,679 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:35:02,682 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:35:02,683 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:35:02,686 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:35:02,686 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:35:02,687 INFO  L87              Difference]: Start difference. First operand 6606 states and 11000 transitions. Second operand  has 7 states, 7 states have (on average 547.1428571428571) internal successors, (3830), 7 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:35:03,072 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:35:03,072 INFO  L93              Difference]: Finished difference Result 18003 states and 29978 transitions.
[2023-11-06 22:35:03,072 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:35:03,073 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 547.1428571428571) internal successors, (3830), 7 states have internal predecessors, (3830), 0 states have call successors, (0), 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 4277
[2023-11-06 22:35:03,076 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:35:03,086 INFO  L225             Difference]: With dead ends: 18003
[2023-11-06 22:35:03,086 INFO  L226             Difference]: Without dead ends: 12253
[2023-11-06 22:35:03,091 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4286 GetRequests, 4274 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:35:03,091 INFO  L413           NwaCegarLoop]: 10865 mSDtfsCounter, 27291 mSDsluCounter, 42321 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27291 SdHoareTripleChecker+Valid, 53186 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
[2023-11-06 22:35:03,092 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27291 Valid, 53186 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:35:03,102 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12253 states.
[2023-11-06 22:35:03,164 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12253 to 6608.
[2023-11-06 22:35:03,169 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6608 states, 6607 states have (on average 1.6652035719691236) internal successors, (11002), 6607 states have internal predecessors, (11002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:35:03,178 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6608 states to 6608 states and 11002 transitions.
[2023-11-06 22:35:03,178 INFO  L78                 Accepts]: Start accepts. Automaton has 6608 states and 11002 transitions. Word has length 4277
[2023-11-06 22:35:03,180 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:35:03,180 INFO  L495      AbstractCegarLoop]: Abstraction has 6608 states and 11002 transitions.
[2023-11-06 22:35:03,180 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 547.1428571428571) internal successors, (3830), 7 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:35:03,181 INFO  L276                IsEmpty]: Start isEmpty. Operand 6608 states and 11002 transitions.
[2023-11-06 22:35:03,257 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4279
[2023-11-06 22:35:03,258 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:35:03,259 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:35:03,304 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0
[2023-11-06 22:35:03,459 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613e8533-9156-4e79-9402-1a3920f81503/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:35:03,459 INFO  L420      AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:35:03,460 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:35:03,460 INFO  L85        PathProgramCache]: Analyzing trace with hash 801991511, now seen corresponding path program 1 times
[2023-11-06 22:35:03,460 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:35:03,460 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157435380]
[2023-11-06 22:35:03,461 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:35:03,461 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms