./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.2.prop1-func-interl.c --full-output --architecture 64bit


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


Checking for ERROR reachability
Using default analysis
Version 0e0057cc
Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.2.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )

 --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 00b3b9d9d2f68c742299ba5330b71d2b4c433ea994898131b47e5df2347c7539
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-11-29 01:12:24,084 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-29 01:12:24,148 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-29 01:12:24,153 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-29 01:12:24,154 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-29 01:12:24,180 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-29 01:12:24,180 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-29 01:12:24,181 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-29 01:12:24,181 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-29 01:12:24,182 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-29 01:12:24,182 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-29 01:12:24,183 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-29 01:12:24,184 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-29 01:12:24,184 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-29 01:12:24,185 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-29 01:12:24,186 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-29 01:12:24,186 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-29 01:12:24,187 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-29 01:12:24,187 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-29 01:12:24,188 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-29 01:12:24,188 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-29 01:12:24,189 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-29 01:12:24,190 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-29 01:12:24,190 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-29 01:12:24,191 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-29 01:12:24,191 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-29 01:12:24,192 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-29 01:12:24,192 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-29 01:12:24,193 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-29 01:12:24,193 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-29 01:12:24,194 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-29 01:12:24,194 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-29 01:12:24,194 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-29 01:12:24,195 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-29 01:12:24,195 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-29 01:12:24,195 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-29 01:12:24,195 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-29 01:12:24,196 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-29 01:12:24,196 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-29 01:12:24,196 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_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )


Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00b3b9d9d2f68c742299ba5330b71d2b4c433ea994898131b47e5df2347c7539
[2023-11-29 01:12:24,391 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-29 01:12:24,410 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-29 01:12:24,413 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-29 01:12:24,414 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-29 01:12:24,415 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-29 01:12:24,416 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.2.prop1-func-interl.c
[2023-11-29 01:12:27,152 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-29 01:12:27,656 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-29 01:12:27,657 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.2.prop1-func-interl.c
[2023-11-29 01:12:27,713 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/data/d7d420d95/7315b8bf13c94f599981ecb7b18887e1/FLAG4a8fa78d1
[2023-11-29 01:12:27,727 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/data/d7d420d95/7315b8bf13c94f599981ecb7b18887e1
[2023-11-29 01:12:27,729 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-29 01:12:27,731 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-29 01:12:27,732 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-29 01:12:27,732 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-29 01:12:27,737 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-29 01:12:27,738 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:12:27" (1/1) ...
[2023-11-29 01:12:27,739 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40ad2402 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:12:27, skipping insertion in model container
[2023-11-29 01:12:27,739 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:12:27" (1/1) ...
[2023-11-29 01:12:28,005 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-29 01:12:28,346 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_e9531252-dfb2-4eb7-a466-98cc603e72f6/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.2.prop1-func-interl.c[1175,1188]
[2023-11-29 01:12:29,610 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-29 01:12:29,622 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-29 01:12:29,637 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_e9531252-dfb2-4eb7-a466-98cc603e72f6/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.2.prop1-func-interl.c[1175,1188]
[2023-11-29 01:12:30,623 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-29 01:12:30,639 INFO  L206         MainTranslator]: Completed translation
[2023-11-29 01:12:30,640 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:12:30 WrapperNode
[2023-11-29 01:12:30,641 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-29 01:12:30,642 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-29 01:12:30,642 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-29 01:12:30,642 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-29 01:12:30,650 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:12:30" (1/1) ...
[2023-11-29 01:12:30,952 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:12:30" (1/1) ...
[2023-11-29 01:12:33,190 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38656
[2023-11-29 01:12:33,192 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-29 01:12:33,193 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-29 01:12:33,193 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-29 01:12:33,193 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-29 01:12:33,246 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:12:30" (1/1) ...
[2023-11-29 01:12:33,246 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:12:30" (1/1) ...
[2023-11-29 01:12:33,824 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:12:30" (1/1) ...
[2023-11-29 01:12:34,345 INFO  L175           MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0].
[2023-11-29 01:12:34,345 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:12:30" (1/1) ...
[2023-11-29 01:12:34,345 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:12:30" (1/1) ...
[2023-11-29 01:12:34,850 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:12:30" (1/1) ...
[2023-11-29 01:12:34,964 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:12:30" (1/1) ...
[2023-11-29 01:12:35,180 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:12:30" (1/1) ...
[2023-11-29 01:12:35,299 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:12:30" (1/1) ...
[2023-11-29 01:12:35,660 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-29 01:12:35,661 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-29 01:12:35,661 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-29 01:12:35,661 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-29 01:12:35,662 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:12:30" (1/1) ...
[2023-11-29 01:12:35,666 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-29 01:12:35,674 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:12:35,686 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2023-11-29 01:12:35,688 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2023-11-29 01:12:35,714 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-29 01:12:35,714 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-11-29 01:12:35,714 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-29 01:12:35,714 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-29 01:12:37,865 INFO  L241             CfgBuilder]: Building ICFG
[2023-11-29 01:12:37,867 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-29 01:12:56,614 INFO  L282             CfgBuilder]: Performing block encoding
[2023-11-29 01:12:57,241 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-29 01:12:57,241 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-29 01:12:57,245 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:12:57 BoogieIcfgContainer
[2023-11-29 01:12:57,245 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-29 01:12:57,247 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-29 01:12:57,247 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-29 01:12:57,251 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-29 01:12:57,251 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:12:27" (1/3) ...
[2023-11-29 01:12:57,252 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22decb4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:12:57, skipping insertion in model container
[2023-11-29 01:12:57,252 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:12:30" (2/3) ...
[2023-11-29 01:12:57,252 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22decb4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:12:57, skipping insertion in model container
[2023-11-29 01:12:57,252 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:12:57" (3/3) ...
[2023-11-29 01:12:57,254 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.rushhour.2.prop1-func-interl.c
[2023-11-29 01:12:57,272 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-29 01:12:57,272 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-29 01:12:57,414 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-29 01:12:57,421 INFO  L357      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@789831c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-29 01:12:57,421 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-29 01:12:57,445 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 6751 states, 6749 states have (on average 1.6706178693139724) internal successors, (11275), 6750 states have internal predecessors, (11275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:12:57,462 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 183
[2023-11-29 01:12:57,462 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:12:57,463 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]
[2023-11-29 01:12:57,464 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:12:57,469 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:12:57,469 INFO  L85        PathProgramCache]: Analyzing trace with hash 1758366592, now seen corresponding path program 1 times
[2023-11-29 01:12:57,478 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:12:57,478 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939980835]
[2023-11-29 01:12:57,479 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:12:57,479 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:12:57,912 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:12:59,061 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:12:59,062 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:12:59,062 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939980835]
[2023-11-29 01:12:59,063 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939980835] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:12:59,063 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:12:59,063 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 01:12:59,065 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976842112]
[2023-11-29 01:12:59,066 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:12:59,071 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:12:59,071 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:12:59,096 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:12:59,097 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:12:59,111 INFO  L87              Difference]: Start difference. First operand  has 6751 states, 6749 states have (on average 1.6706178693139724) internal successors, (11275), 6750 states have internal predecessors, (11275), 0 states have call successors, (0), 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 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:12:59,496 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:12:59,497 INFO  L93              Difference]: Finished difference Result 13291 states and 22201 transitions.
[2023-11-29 01:12:59,498 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:12:59,499 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 182
[2023-11-29 01:12:59,500 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:12:59,542 INFO  L225             Difference]: With dead ends: 13291
[2023-11-29 01:12:59,542 INFO  L226             Difference]: Without dead ends: 6751
[2023-11-29 01:12:59,554 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:12:59,557 INFO  L413           NwaCegarLoop]: 11268 mSDtfsCounter, 1 mSDsluCounter, 22531 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33799 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 01:12:59,558 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 33799 Invalid, 13 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 01:12:59,583 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6751 states.
[2023-11-29 01:12:59,724 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6751 to 6751.
[2023-11-29 01:12:59,737 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6751 states, 6750 states have (on average 1.670074074074074) internal successors, (11273), 6750 states have internal predecessors, (11273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:12:59,754 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6751 states to 6751 states and 11273 transitions.
[2023-11-29 01:12:59,755 INFO  L78                 Accepts]: Start accepts. Automaton has 6751 states and 11273 transitions. Word has length 182
[2023-11-29 01:12:59,756 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:12:59,756 INFO  L495      AbstractCegarLoop]: Abstraction has 6751 states and 11273 transitions.
[2023-11-29 01:12:59,757 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:12:59,757 INFO  L276                IsEmpty]: Start isEmpty. Operand 6751 states and 11273 transitions.
[2023-11-29 01:12:59,761 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 184
[2023-11-29 01:12:59,761 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:12:59,761 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]
[2023-11-29 01:12:59,762 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-29 01:12:59,762 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:12:59,762 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:12:59,763 INFO  L85        PathProgramCache]: Analyzing trace with hash -1323484480, now seen corresponding path program 1 times
[2023-11-29 01:12:59,763 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:12:59,763 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884048013]
[2023-11-29 01:12:59,763 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:12:59,763 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:12:59,963 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:13:00,242 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:13:00,242 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:13:00,243 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884048013]
[2023-11-29 01:13:00,243 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884048013] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:13:00,243 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:13:00,243 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 01:13:00,244 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668071751]
[2023-11-29 01:13:00,244 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:13:00,245 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:13:00,246 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:13:00,246 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:13:00,247 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:13:00,247 INFO  L87              Difference]: Start difference. First operand 6751 states and 11273 transitions. Second operand  has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:13:00,540 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:13:00,540 INFO  L93              Difference]: Finished difference Result 13294 states and 22199 transitions.
[2023-11-29 01:13:00,541 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:13:00,541 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 0 states have call successors, (0), 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 183
[2023-11-29 01:13:00,542 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:13:00,569 INFO  L225             Difference]: With dead ends: 13294
[2023-11-29 01:13:00,569 INFO  L226             Difference]: Without dead ends: 6754
[2023-11-29 01:13:00,575 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:13:00,577 INFO  L413           NwaCegarLoop]: 11268 mSDtfsCounter, 1 mSDsluCounter, 22529 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33797 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 01:13:00,577 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 33797 Invalid, 15 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 01:13:00,588 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6754 states.
[2023-11-29 01:13:00,909 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6754 to 6753.
[2023-11-29 01:13:00,925 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6753 states, 6752 states have (on average 1.6698755924170616) internal successors, (11275), 6752 states have internal predecessors, (11275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:13:00,950 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6753 states to 6753 states and 11275 transitions.
[2023-11-29 01:13:00,951 INFO  L78                 Accepts]: Start accepts. Automaton has 6753 states and 11275 transitions. Word has length 183
[2023-11-29 01:13:00,951 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:13:00,952 INFO  L495      AbstractCegarLoop]: Abstraction has 6753 states and 11275 transitions.
[2023-11-29 01:13:00,952 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:13:00,953 INFO  L276                IsEmpty]: Start isEmpty. Operand 6753 states and 11275 transitions.
[2023-11-29 01:13:00,956 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 185
[2023-11-29 01:13:00,956 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:13:00,957 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]
[2023-11-29 01:13:00,957 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-29 01:13:00,957 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:13:00,958 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:13:00,958 INFO  L85        PathProgramCache]: Analyzing trace with hash 1711222682, now seen corresponding path program 1 times
[2023-11-29 01:13:00,958 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:13:00,959 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494781841]
[2023-11-29 01:13:00,959 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:13:00,959 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:13:01,166 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:13:01,508 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:13:01,508 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:13:01,508 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494781841]
[2023-11-29 01:13:01,509 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494781841] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:13:01,509 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:13:01,509 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 01:13:01,509 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975276432]
[2023-11-29 01:13:01,510 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:13:01,510 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:13:01,510 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:13:01,511 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:13:01,511 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:13:01,512 INFO  L87              Difference]: Start difference. First operand 6753 states and 11275 transitions. Second operand  has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:13:02,013 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:13:02,014 INFO  L93              Difference]: Finished difference Result 19827 states and 33108 transitions.
[2023-11-29 01:13:02,014 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:13:02,014 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 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 184
[2023-11-29 01:13:02,015 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:13:02,081 INFO  L225             Difference]: With dead ends: 19827
[2023-11-29 01:13:02,081 INFO  L226             Difference]: Without dead ends: 13285
[2023-11-29 01:13:02,092 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:13:02,094 INFO  L413           NwaCegarLoop]: 11349 mSDtfsCounter, 10906 mSDsluCounter, 22606 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10906 SdHoareTripleChecker+Valid, 33955 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 01:13:02,094 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [10906 Valid, 33955 Invalid, 20 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 01:13:02,116 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13285 states.
[2023-11-29 01:13:02,272 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13285 to 6755.
[2023-11-29 01:13:02,283 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6755 states, 6754 states have (on average 1.66967722830915) internal successors, (11277), 6754 states have internal predecessors, (11277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:13:02,300 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6755 states to 6755 states and 11277 transitions.
[2023-11-29 01:13:02,301 INFO  L78                 Accepts]: Start accepts. Automaton has 6755 states and 11277 transitions. Word has length 184
[2023-11-29 01:13:02,301 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:13:02,301 INFO  L495      AbstractCegarLoop]: Abstraction has 6755 states and 11277 transitions.
[2023-11-29 01:13:02,302 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:13:02,302 INFO  L276                IsEmpty]: Start isEmpty. Operand 6755 states and 11277 transitions.
[2023-11-29 01:13:02,304 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 186
[2023-11-29 01:13:02,304 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:13:02,304 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]
[2023-11-29 01:13:02,305 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-29 01:13:02,305 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:13:02,305 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:13:02,306 INFO  L85        PathProgramCache]: Analyzing trace with hash -1186763866, now seen corresponding path program 1 times
[2023-11-29 01:13:02,306 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:13:02,306 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090518352]
[2023-11-29 01:13:02,306 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:13:02,307 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:13:02,505 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:13:02,950 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:13:02,950 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:13:02,950 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090518352]
[2023-11-29 01:13:02,951 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090518352] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:13:02,951 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:13:02,951 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 01:13:02,951 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653663628]
[2023-11-29 01:13:02,951 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:13:02,952 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 01:13:02,952 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:13:02,953 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 01:13:02,953 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:13:02,954 INFO  L87              Difference]: Start difference. First operand 6755 states and 11277 transitions. Second operand  has 5 states, 5 states have (on average 37.0) internal successors, (185), 4 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:13:03,557 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:13:03,557 INFO  L93              Difference]: Finished difference Result 19884 states and 33199 transitions.
[2023-11-29 01:13:03,558 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 01:13:03,558 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 37.0) internal successors, (185), 4 states have internal predecessors, (185), 0 states have call successors, (0), 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 185
[2023-11-29 01:13:03,559 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:13:03,585 INFO  L225             Difference]: With dead ends: 19884
[2023-11-29 01:13:03,585 INFO  L226             Difference]: Without dead ends: 13340
[2023-11-29 01:13:03,595 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2023-11-29 01:13:03,596 INFO  L413           NwaCegarLoop]: 11345 mSDtfsCounter, 43911 mSDsluCounter, 22527 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43911 SdHoareTripleChecker+Valid, 33872 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 01:13:03,597 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [43911 Valid, 33872 Invalid, 21 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 01:13:03,618 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13340 states.
[2023-11-29 01:13:03,757 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13340 to 6806.
[2023-11-29 01:13:03,768 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.6696546656869948) internal successors, (11362), 6805 states have internal predecessors, (11362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:13:03,785 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11362 transitions.
[2023-11-29 01:13:03,785 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11362 transitions. Word has length 185
[2023-11-29 01:13:03,786 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:13:03,786 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11362 transitions.
[2023-11-29 01:13:03,786 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 37.0) internal successors, (185), 4 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:13:03,786 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11362 transitions.
[2023-11-29 01:13:03,955 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4491
[2023-11-29 01:13:03,955 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:13:03,958 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 01:13:03,958 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-11-29 01:13:03,958 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:13:03,959 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:13:03,961 INFO  L85        PathProgramCache]: Analyzing trace with hash 311883883, now seen corresponding path program 1 times
[2023-11-29 01:13:03,961 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:13:03,961 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036973496]
[2023-11-29 01:13:03,962 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:13:03,962 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:13:04,679 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:13:04,679 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829733443]
[2023-11-29 01:13:04,680 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:13:04,680 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:13:04,680 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:13:04,682 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:13:04,696 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-29 01:13:14,961 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:13:15,187 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39062 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:13:15,373 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:13:16,838 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:13:16,838 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:13:16,838 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:13:16,838 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036973496]
[2023-11-29 01:13:16,838 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:13:16,838 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829733443]
[2023-11-29 01:13:16,839 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829733443] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:13:16,839 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:13:16,840 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:13:16,841 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893923841]
[2023-11-29 01:13:16,841 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:13:16,845 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:13:16,846 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:13:16,849 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:13:16,849 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:13:16,851 INFO  L87              Difference]: Start difference. First operand 6806 states and 11362 transitions. Second operand  has 4 states, 4 states have (on average 1122.5) internal successors, (4490), 3 states have internal predecessors, (4490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:13:21,535 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:13:21,535 INFO  L93              Difference]: Finished difference Result 13726 states and 22915 transitions.
[2023-11-29 01:13:21,536 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:13:21,537 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1122.5) internal successors, (4490), 3 states have internal predecessors, (4490), 0 states have call successors, (0), 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 4490
[2023-11-29 01:13:21,538 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:13:21,548 INFO  L225             Difference]: With dead ends: 13726
[2023-11-29 01:13:21,548 INFO  L226             Difference]: Without dead ends: 7182
[2023-11-29 01:13:21,554 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4490 GetRequests, 4487 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:13:21,556 INFO  L413           NwaCegarLoop]: 8538 mSDtfsCounter, 21771 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 3613 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21771 SdHoareTripleChecker+Valid, 9431 SdHoareTripleChecker+Invalid, 3613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time
[2023-11-29 01:13:21,556 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21771 Valid, 9431 Invalid, 3613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3613 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time]
[2023-11-29 01:13:21,567 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7182 states.
[2023-11-29 01:13:21,785 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7182 to 6806.
[2023-11-29 01:13:21,792 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.6695077149155033) internal successors, (11361), 6805 states have internal predecessors, (11361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:13:21,802 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11361 transitions.
[2023-11-29 01:13:21,802 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11361 transitions. Word has length 4490
[2023-11-29 01:13:21,803 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:13:21,803 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11361 transitions.
[2023-11-29 01:13:21,805 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1122.5) internal successors, (4490), 3 states have internal predecessors, (4490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:13:21,805 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11361 transitions.
[2023-11-29 01:13:21,896 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4492
[2023-11-29 01:13:21,897 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:13:21,899 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 01:13:22,004 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-29 01:13:22,099 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:13:22,100 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:13:22,101 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:13:22,103 INFO  L85        PathProgramCache]: Analyzing trace with hash 1319086556, now seen corresponding path program 1 times
[2023-11-29 01:13:22,103 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:13:22,103 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660928814]
[2023-11-29 01:13:22,104 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:13:22,104 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:13:22,807 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:13:22,807 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [814887823]
[2023-11-29 01:13:22,808 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:13:22,809 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:13:22,809 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:13:22,812 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:13:22,835 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-29 01:13:32,773 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:13:33,013 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39063 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:13:33,109 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:13:34,609 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:13:34,609 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:13:34,609 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:13:34,609 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660928814]
[2023-11-29 01:13:34,609 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:13:34,610 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814887823]
[2023-11-29 01:13:34,610 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [814887823] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:13:34,610 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:13:34,611 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:13:34,612 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888168917]
[2023-11-29 01:13:34,612 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:13:34,617 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:13:34,617 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:13:34,623 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:13:34,623 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:13:34,625 INFO  L87              Difference]: Start difference. First operand 6806 states and 11361 transitions. Second operand  has 4 states, 4 states have (on average 1122.75) internal successors, (4491), 3 states have internal predecessors, (4491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:13:39,321 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:13:39,322 INFO  L93              Difference]: Finished difference Result 13782 states and 23006 transitions.
[2023-11-29 01:13:39,322 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:13:39,323 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1122.75) internal successors, (4491), 3 states have internal predecessors, (4491), 0 states have call successors, (0), 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 4491
[2023-11-29 01:13:39,324 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:13:39,334 INFO  L225             Difference]: With dead ends: 13782
[2023-11-29 01:13:39,334 INFO  L226             Difference]: Without dead ends: 7238
[2023-11-29 01:13:39,340 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4491 GetRequests, 4488 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:13:39,341 INFO  L413           NwaCegarLoop]: 8620 mSDtfsCounter, 21732 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 3633 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21732 SdHoareTripleChecker+Valid, 9596 SdHoareTripleChecker+Invalid, 3633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time
[2023-11-29 01:13:39,341 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21732 Valid, 9596 Invalid, 3633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3633 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time]
[2023-11-29 01:13:39,351 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7238 states.
[2023-11-29 01:13:39,436 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7238 to 6806.
[2023-11-29 01:13:39,447 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.6693607641440118) internal successors, (11360), 6805 states have internal predecessors, (11360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:13:39,459 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11360 transitions.
[2023-11-29 01:13:39,459 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11360 transitions. Word has length 4491
[2023-11-29 01:13:39,461 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:13:39,461 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11360 transitions.
[2023-11-29 01:13:39,463 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1122.75) internal successors, (4491), 3 states have internal predecessors, (4491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:13:39,463 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11360 transitions.
[2023-11-29 01:13:39,573 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4493
[2023-11-29 01:13:39,573 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:13:39,576 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 01:13:39,677 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2023-11-29 01:13:39,776 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5
[2023-11-29 01:13:39,777 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:13:39,777 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:13:39,780 INFO  L85        PathProgramCache]: Analyzing trace with hash 2115701141, now seen corresponding path program 1 times
[2023-11-29 01:13:39,780 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:13:39,780 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414821377]
[2023-11-29 01:13:39,780 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:13:39,780 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:13:40,369 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:13:40,369 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222332782]
[2023-11-29 01:13:40,370 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:13:40,371 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:13:40,371 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:13:40,372 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:13:40,376 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-29 01:13:50,550 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:13:50,795 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39064 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:13:50,882 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:13:52,263 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:13:52,263 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:13:52,263 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:13:52,263 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414821377]
[2023-11-29 01:13:52,263 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:13:52,263 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222332782]
[2023-11-29 01:13:52,264 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222332782] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:13:52,264 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:13:52,265 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:13:52,266 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969643267]
[2023-11-29 01:13:52,266 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:13:52,272 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:13:52,272 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:13:52,275 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:13:52,275 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:13:52,277 INFO  L87              Difference]: Start difference. First operand 6806 states and 11360 transitions. Second operand  has 4 states, 4 states have (on average 1123.0) internal successors, (4492), 3 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:13:56,899 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:13:56,899 INFO  L93              Difference]: Finished difference Result 13845 states and 23109 transitions.
[2023-11-29 01:13:56,899 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:13:56,901 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1123.0) internal successors, (4492), 3 states have internal predecessors, (4492), 0 states have call successors, (0), 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 4492
[2023-11-29 01:13:56,901 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:13:56,910 INFO  L225             Difference]: With dead ends: 13845
[2023-11-29 01:13:56,910 INFO  L226             Difference]: Without dead ends: 7301
[2023-11-29 01:13:56,916 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4492 GetRequests, 4489 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:13:56,917 INFO  L413           NwaCegarLoop]: 8714 mSDtfsCounter, 21689 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 3653 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21689 SdHoareTripleChecker+Valid, 9785 SdHoareTripleChecker+Invalid, 3653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time
[2023-11-29 01:13:56,917 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21689 Valid, 9785 Invalid, 3653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3653 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time]
[2023-11-29 01:13:56,926 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7301 states.
[2023-11-29 01:13:56,988 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7301 to 6806.
[2023-11-29 01:13:56,995 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.6692138133725203) internal successors, (11359), 6805 states have internal predecessors, (11359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:13:57,003 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11359 transitions.
[2023-11-29 01:13:57,004 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11359 transitions. Word has length 4492
[2023-11-29 01:13:57,005 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:13:57,005 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11359 transitions.
[2023-11-29 01:13:57,006 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1123.0) internal successors, (4492), 3 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:13:57,006 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11359 transitions.
[2023-11-29 01:13:57,096 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4494
[2023-11-29 01:13:57,096 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:13:57,098 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 01:13:57,199 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2023-11-29 01:13:57,299 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:13:57,299 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:13:57,299 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:13:57,302 INFO  L85        PathProgramCache]: Analyzing trace with hash -579464299, now seen corresponding path program 1 times
[2023-11-29 01:13:57,302 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:13:57,302 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653196126]
[2023-11-29 01:13:57,303 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:13:57,303 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:13:57,892 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:13:57,893 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1268225347]
[2023-11-29 01:13:57,894 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:13:57,894 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:13:57,894 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:13:57,895 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:13:57,900 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-29 01:14:07,668 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:14:07,898 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39065 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:14:08,005 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:14:09,171 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:14:09,171 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:14:09,172 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:14:09,172 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653196126]
[2023-11-29 01:14:09,172 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:14:09,172 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268225347]
[2023-11-29 01:14:09,172 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268225347] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:14:09,172 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:14:09,174 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:14:09,174 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052617185]
[2023-11-29 01:14:09,174 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:14:09,178 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:14:09,178 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:14:09,181 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:14:09,181 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:14:09,183 INFO  L87              Difference]: Start difference. First operand 6806 states and 11359 transitions. Second operand  has 4 states, 4 states have (on average 1123.25) internal successors, (4493), 3 states have internal predecessors, (4493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:14:13,417 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:14:13,418 INFO  L93              Difference]: Finished difference Result 13849 states and 23113 transitions.
[2023-11-29 01:14:13,418 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:14:13,419 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1123.25) internal successors, (4493), 3 states have internal predecessors, (4493), 0 states have call successors, (0), 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 4493
[2023-11-29 01:14:13,420 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:14:13,429 INFO  L225             Difference]: With dead ends: 13849
[2023-11-29 01:14:13,429 INFO  L226             Difference]: Without dead ends: 7305
[2023-11-29 01:14:13,435 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4493 GetRequests, 4490 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:14:13,436 INFO  L413           NwaCegarLoop]: 8718 mSDtfsCounter, 21684 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 3655 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21684 SdHoareTripleChecker+Valid, 9794 SdHoareTripleChecker+Invalid, 3655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time
[2023-11-29 01:14:13,437 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21684 Valid, 9794 Invalid, 3655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3655 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time]
[2023-11-29 01:14:13,445 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7305 states.
[2023-11-29 01:14:13,507 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7305 to 6806.
[2023-11-29 01:14:13,514 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.6690668626010285) internal successors, (11358), 6805 states have internal predecessors, (11358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:14:13,523 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11358 transitions.
[2023-11-29 01:14:13,523 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11358 transitions. Word has length 4493
[2023-11-29 01:14:13,525 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:14:13,525 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11358 transitions.
[2023-11-29 01:14:13,526 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1123.25) internal successors, (4493), 3 states have internal predecessors, (4493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:14:13,526 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11358 transitions.
[2023-11-29 01:14:13,621 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4495
[2023-11-29 01:14:13,621 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:14:13,624 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 01:14:13,733 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0
[2023-11-29 01:14:13,824 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:14:13,825 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:14:13,825 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:14:13,827 INFO  L85        PathProgramCache]: Analyzing trace with hash -1077934518, now seen corresponding path program 1 times
[2023-11-29 01:14:13,827 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:14:13,827 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854863601]
[2023-11-29 01:14:13,828 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:14:13,828 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:14:14,406 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:14:14,406 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [530742577]
[2023-11-29 01:14:14,407 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:14:14,407 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:14:14,407 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:14:14,408 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:14:14,411 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-29 01:14:24,079 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:14:24,316 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39066 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:14:24,392 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:14:25,971 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:14:25,971 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:14:25,971 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:14:25,972 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854863601]
[2023-11-29 01:14:25,972 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:14:25,972 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530742577]
[2023-11-29 01:14:25,972 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [530742577] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:14:25,972 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:14:25,974 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:14:25,974 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823957850]
[2023-11-29 01:14:25,974 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:14:25,981 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:14:25,981 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:14:25,988 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:14:25,988 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:14:25,989 INFO  L87              Difference]: Start difference. First operand 6806 states and 11358 transitions. Second operand  has 4 states, 4 states have (on average 1123.5) internal successors, (4494), 3 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:14:31,115 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:14:31,116 INFO  L93              Difference]: Finished difference Result 13997 states and 23357 transitions.
[2023-11-29 01:14:31,116 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:14:31,117 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1123.5) internal successors, (4494), 3 states have internal predecessors, (4494), 0 states have call successors, (0), 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 4494
[2023-11-29 01:14:31,119 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:14:31,127 INFO  L225             Difference]: With dead ends: 13997
[2023-11-29 01:14:31,127 INFO  L226             Difference]: Without dead ends: 7453
[2023-11-29 01:14:31,133 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4494 GetRequests, 4491 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:14:31,134 INFO  L413           NwaCegarLoop]: 8883 mSDtfsCounter, 21583 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 3815 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21583 SdHoareTripleChecker+Valid, 10125 SdHoareTripleChecker+Invalid, 3815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time
[2023-11-29 01:14:31,134 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21583 Valid, 10125 Invalid, 3815 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 3815 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time]
[2023-11-29 01:14:31,144 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7453 states.
[2023-11-29 01:14:31,248 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7453 to 6806.
[2023-11-29 01:14:31,255 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.668919911829537) internal successors, (11357), 6805 states have internal predecessors, (11357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:14:31,271 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11357 transitions.
[2023-11-29 01:14:31,271 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11357 transitions. Word has length 4494
[2023-11-29 01:14:31,273 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:14:31,274 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11357 transitions.
[2023-11-29 01:14:31,275 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1123.5) internal successors, (4494), 3 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:14:31,275 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11357 transitions.
[2023-11-29 01:14:31,553 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4496
[2023-11-29 01:14:31,553 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:14:31,556 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 01:14:31,668 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0
[2023-11-29 01:14:31,756 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:14:31,757 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:14:31,757 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:14:31,759 INFO  L85        PathProgramCache]: Analyzing trace with hash 645766410, now seen corresponding path program 1 times
[2023-11-29 01:14:31,759 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:14:31,760 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822583335]
[2023-11-29 01:14:31,760 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:14:31,760 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:14:32,376 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:14:32,377 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615295546]
[2023-11-29 01:14:32,378 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:14:32,378 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:14:32,378 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:14:32,379 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:14:32,380 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-29 01:14:43,010 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:14:43,251 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39067 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:14:43,354 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:14:45,552 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:14:45,552 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:14:45,552 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:14:45,552 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822583335]
[2023-11-29 01:14:45,552 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:14:45,553 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615295546]
[2023-11-29 01:14:45,553 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [615295546] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:14:45,553 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:14:45,554 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:14:45,555 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403215452]
[2023-11-29 01:14:45,555 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:14:45,561 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:14:45,561 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:14:45,565 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:14:45,566 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:14:45,567 INFO  L87              Difference]: Start difference. First operand 6806 states and 11357 transitions. Second operand  has 4 states, 4 states have (on average 1123.75) internal successors, (4495), 3 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:14:50,258 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:14:50,258 INFO  L93              Difference]: Finished difference Result 14001 states and 23361 transitions.
[2023-11-29 01:14:50,259 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:14:50,260 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1123.75) internal successors, (4495), 3 states have internal predecessors, (4495), 0 states have call successors, (0), 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 4495
[2023-11-29 01:14:50,261 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:14:50,270 INFO  L225             Difference]: With dead ends: 14001
[2023-11-29 01:14:50,270 INFO  L226             Difference]: Without dead ends: 7457
[2023-11-29 01:14:50,277 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4495 GetRequests, 4492 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:14:50,277 INFO  L413           NwaCegarLoop]: 8887 mSDtfsCounter, 21578 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 3817 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21578 SdHoareTripleChecker+Valid, 10134 SdHoareTripleChecker+Invalid, 3817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time
[2023-11-29 01:14:50,278 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21578 Valid, 10134 Invalid, 3817 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 3817 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time]
[2023-11-29 01:14:50,288 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7457 states.
[2023-11-29 01:14:50,368 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7457 to 6806.
[2023-11-29 01:14:50,375 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.6687729610580455) internal successors, (11356), 6805 states have internal predecessors, (11356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:14:50,386 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11356 transitions.
[2023-11-29 01:14:50,387 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11356 transitions. Word has length 4495
[2023-11-29 01:14:50,388 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:14:50,388 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11356 transitions.
[2023-11-29 01:14:50,389 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1123.75) internal successors, (4495), 3 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:14:50,390 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11356 transitions.
[2023-11-29 01:14:50,592 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4497
[2023-11-29 01:14:50,592 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:14:50,595 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 01:14:50,707 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0
[2023-11-29 01:14:50,795 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2023-11-29 01:14:50,796 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:14:50,796 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:14:50,798 INFO  L85        PathProgramCache]: Analyzing trace with hash 984185215, now seen corresponding path program 1 times
[2023-11-29 01:14:50,799 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:14:50,799 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228028163]
[2023-11-29 01:14:50,800 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:14:50,800 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:14:51,487 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:14:51,487 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1453257753]
[2023-11-29 01:14:51,488 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:14:51,488 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:14:51,488 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:14:51,489 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:14:51,496 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-29 01:15:00,954 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:15:01,199 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39068 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:15:01,278 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:15:03,233 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:15:03,233 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:15:03,233 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:15:03,233 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228028163]
[2023-11-29 01:15:03,233 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:15:03,233 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453257753]
[2023-11-29 01:15:03,234 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453257753] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:15:03,234 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:15:03,235 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:15:03,235 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260461438]
[2023-11-29 01:15:03,235 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:15:03,241 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:15:03,241 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:15:03,245 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:15:03,246 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:15:03,247 INFO  L87              Difference]: Start difference. First operand 6806 states and 11356 transitions. Second operand  has 4 states, 4 states have (on average 1124.0) internal successors, (4496), 3 states have internal predecessors, (4496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:15:07,764 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:15:07,764 INFO  L93              Difference]: Finished difference Result 14149 states and 23605 transitions.
[2023-11-29 01:15:07,764 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:15:07,765 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1124.0) internal successors, (4496), 3 states have internal predecessors, (4496), 0 states have call successors, (0), 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 4496
[2023-11-29 01:15:07,766 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:15:07,772 INFO  L225             Difference]: With dead ends: 14149
[2023-11-29 01:15:07,773 INFO  L226             Difference]: Without dead ends: 7605
[2023-11-29 01:15:07,776 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4496 GetRequests, 4493 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:15:07,777 INFO  L413           NwaCegarLoop]: 9052 mSDtfsCounter, 21477 mSDsluCounter, 1413 mSDsCounter, 0 mSdLazyCounter, 3977 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21477 SdHoareTripleChecker+Valid, 10465 SdHoareTripleChecker+Invalid, 3977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time
[2023-11-29 01:15:07,777 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21477 Valid, 10465 Invalid, 3977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3977 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time]
[2023-11-29 01:15:07,786 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7605 states.
[2023-11-29 01:15:07,835 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7605 to 6806.
[2023-11-29 01:15:07,841 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.668626010286554) internal successors, (11355), 6805 states have internal predecessors, (11355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:15:07,848 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11355 transitions.
[2023-11-29 01:15:07,849 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11355 transitions. Word has length 4496
[2023-11-29 01:15:07,850 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:15:07,850 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11355 transitions.
[2023-11-29 01:15:07,851 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1124.0) internal successors, (4496), 3 states have internal predecessors, (4496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:15:07,851 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11355 transitions.
[2023-11-29 01:15:07,939 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4498
[2023-11-29 01:15:07,940 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:15:07,942 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 01:15:08,049 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0
[2023-11-29 01:15:08,142 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:15:08,143 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:15:08,143 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:15:08,144 INFO  L85        PathProgramCache]: Analyzing trace with hash -1425617665, now seen corresponding path program 1 times
[2023-11-29 01:15:08,144 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:15:08,145 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160519196]
[2023-11-29 01:15:08,145 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:15:08,145 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:15:08,688 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:15:08,688 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1103920301]
[2023-11-29 01:15:08,690 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:15:08,690 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:15:08,690 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:15:08,691 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:15:08,692 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-11-29 01:15:18,270 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:15:18,513 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39069 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:15:18,591 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:15:20,350 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:15:20,350 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:15:20,350 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:15:20,350 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160519196]
[2023-11-29 01:15:20,350 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:15:20,350 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103920301]
[2023-11-29 01:15:20,350 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103920301] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:15:20,350 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:15:20,351 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:15:20,352 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139127007]
[2023-11-29 01:15:20,352 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:15:20,355 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:15:20,355 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:15:20,358 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:15:20,358 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:15:20,359 INFO  L87              Difference]: Start difference. First operand 6806 states and 11355 transitions. Second operand  has 4 states, 4 states have (on average 1124.25) internal successors, (4497), 3 states have internal predecessors, (4497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:15:25,250 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:15:25,250 INFO  L93              Difference]: Finished difference Result 14153 states and 23609 transitions.
[2023-11-29 01:15:25,251 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:15:25,252 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1124.25) internal successors, (4497), 3 states have internal predecessors, (4497), 0 states have call successors, (0), 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 4497
[2023-11-29 01:15:25,252 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:15:25,258 INFO  L225             Difference]: With dead ends: 14153
[2023-11-29 01:15:25,259 INFO  L226             Difference]: Without dead ends: 7609
[2023-11-29 01:15:25,262 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4497 GetRequests, 4494 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:15:25,263 INFO  L413           NwaCegarLoop]: 9056 mSDtfsCounter, 21472 mSDsluCounter, 1418 mSDsCounter, 0 mSdLazyCounter, 3979 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21472 SdHoareTripleChecker+Valid, 10474 SdHoareTripleChecker+Invalid, 3979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time
[2023-11-29 01:15:25,263 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21472 Valid, 10474 Invalid, 3979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3979 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time]
[2023-11-29 01:15:25,271 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7609 states.
[2023-11-29 01:15:25,320 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7609 to 6806.
[2023-11-29 01:15:25,326 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.6684790595150625) internal successors, (11354), 6805 states have internal predecessors, (11354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:15:25,337 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11354 transitions.
[2023-11-29 01:15:25,337 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11354 transitions. Word has length 4497
[2023-11-29 01:15:25,338 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:15:25,339 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11354 transitions.
[2023-11-29 01:15:25,340 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1124.25) internal successors, (4497), 3 states have internal predecessors, (4497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:15:25,340 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11354 transitions.
[2023-11-29 01:15:25,431 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4499
[2023-11-29 01:15:25,431 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:15:25,433 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 01:15:25,533 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0
[2023-11-29 01:15:25,634 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:15:25,634 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:15:25,634 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:15:25,636 INFO  L85        PathProgramCache]: Analyzing trace with hash 670999348, now seen corresponding path program 1 times
[2023-11-29 01:15:25,636 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:15:25,636 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412691775]
[2023-11-29 01:15:25,636 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:15:25,637 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:15:26,181 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:15:26,181 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134917077]
[2023-11-29 01:15:26,182 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:15:26,182 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:15:26,182 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:15:26,183 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:15:26,184 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-11-29 01:15:35,812 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:15:36,044 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39070 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:15:36,122 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:15:38,130 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:15:38,130 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:15:38,130 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:15:38,130 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412691775]
[2023-11-29 01:15:38,131 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:15:38,131 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134917077]
[2023-11-29 01:15:38,131 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134917077] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:15:38,131 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:15:38,133 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:15:38,133 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171935851]
[2023-11-29 01:15:38,133 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:15:38,136 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:15:38,136 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:15:38,140 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:15:38,140 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:15:38,141 INFO  L87              Difference]: Start difference. First operand 6806 states and 11354 transitions. Second operand  has 4 states, 4 states have (on average 1124.5) internal successors, (4498), 3 states have internal predecessors, (4498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:15:42,935 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:15:42,935 INFO  L93              Difference]: Finished difference Result 14301 states and 23853 transitions.
[2023-11-29 01:15:42,935 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:15:42,936 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1124.5) internal successors, (4498), 3 states have internal predecessors, (4498), 0 states have call successors, (0), 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 4498
[2023-11-29 01:15:42,937 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:15:42,944 INFO  L225             Difference]: With dead ends: 14301
[2023-11-29 01:15:42,944 INFO  L226             Difference]: Without dead ends: 7757
[2023-11-29 01:15:42,948 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4498 GetRequests, 4495 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:15:42,948 INFO  L413           NwaCegarLoop]: 9221 mSDtfsCounter, 21371 mSDsluCounter, 1584 mSDsCounter, 0 mSdLazyCounter, 4139 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21371 SdHoareTripleChecker+Valid, 10805 SdHoareTripleChecker+Invalid, 4139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time
[2023-11-29 01:15:42,948 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21371 Valid, 10805 Invalid, 4139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4139 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time]
[2023-11-29 01:15:42,956 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7757 states.
[2023-11-29 01:15:43,011 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7757 to 6806.
[2023-11-29 01:15:43,016 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.668332108743571) internal successors, (11353), 6805 states have internal predecessors, (11353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:15:43,024 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11353 transitions.
[2023-11-29 01:15:43,024 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11353 transitions. Word has length 4498
[2023-11-29 01:15:43,025 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:15:43,025 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11353 transitions.
[2023-11-29 01:15:43,026 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1124.5) internal successors, (4498), 3 states have internal predecessors, (4498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:15:43,027 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11353 transitions.
[2023-11-29 01:15:43,111 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4500
[2023-11-29 01:15:43,112 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:15:43,114 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 01:15:43,213 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0
[2023-11-29 01:15:43,314 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12
[2023-11-29 01:15:43,315 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:15:43,315 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:15:43,317 INFO  L85        PathProgramCache]: Analyzing trace with hash -1612913804, now seen corresponding path program 1 times
[2023-11-29 01:15:43,317 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:15:43,317 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123198943]
[2023-11-29 01:15:43,317 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:15:43,317 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:15:43,844 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:15:43,845 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781611918]
[2023-11-29 01:15:43,846 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:15:43,846 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:15:43,846 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:15:43,847 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:15:43,848 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2023-11-29 01:15:53,754 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:15:54,011 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39071 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:15:54,099 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:15:56,316 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:15:56,316 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:15:56,316 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:15:56,316 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123198943]
[2023-11-29 01:15:56,317 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:15:56,317 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781611918]
[2023-11-29 01:15:56,317 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781611918] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:15:56,317 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:15:56,319 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:15:56,319 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190027507]
[2023-11-29 01:15:56,319 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:15:56,322 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:15:56,322 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:15:56,326 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:15:56,326 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:15:56,327 INFO  L87              Difference]: Start difference. First operand 6806 states and 11353 transitions. Second operand  has 4 states, 4 states have (on average 1124.75) internal successors, (4499), 3 states have internal predecessors, (4499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:16:01,199 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:16:01,200 INFO  L93              Difference]: Finished difference Result 14305 states and 23857 transitions.
[2023-11-29 01:16:01,200 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:16:01,201 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1124.75) internal successors, (4499), 3 states have internal predecessors, (4499), 0 states have call successors, (0), 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 4499
[2023-11-29 01:16:01,202 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:16:01,208 INFO  L225             Difference]: With dead ends: 14305
[2023-11-29 01:16:01,208 INFO  L226             Difference]: Without dead ends: 7761
[2023-11-29 01:16:01,212 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4499 GetRequests, 4496 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:16:01,213 INFO  L413           NwaCegarLoop]: 9225 mSDtfsCounter, 21366 mSDsluCounter, 1589 mSDsCounter, 0 mSdLazyCounter, 4141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21366 SdHoareTripleChecker+Valid, 10814 SdHoareTripleChecker+Invalid, 4141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time
[2023-11-29 01:16:01,213 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21366 Valid, 10814 Invalid, 4141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4141 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time]
[2023-11-29 01:16:01,221 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7761 states.
[2023-11-29 01:16:01,291 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7761 to 6806.
[2023-11-29 01:16:01,297 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.6681851579720794) internal successors, (11352), 6805 states have internal predecessors, (11352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:16:01,307 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11352 transitions.
[2023-11-29 01:16:01,307 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11352 transitions. Word has length 4499
[2023-11-29 01:16:01,308 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:16:01,308 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11352 transitions.
[2023-11-29 01:16:01,309 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1124.75) internal successors, (4499), 3 states have internal predecessors, (4499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:16:01,309 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11352 transitions.
[2023-11-29 01:16:01,463 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4501
[2023-11-29 01:16:01,463 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:16:01,465 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 01:16:01,567 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0
[2023-11-29 01:16:01,666 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13
[2023-11-29 01:16:01,666 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:16:01,667 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:16:01,669 INFO  L85        PathProgramCache]: Analyzing trace with hash 654754665, now seen corresponding path program 1 times
[2023-11-29 01:16:01,669 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:16:01,669 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659391509]
[2023-11-29 01:16:01,670 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:16:01,670 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:16:02,197 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:16:02,197 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1738113082]
[2023-11-29 01:16:02,198 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:16:02,198 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:16:02,198 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:16:02,199 INFO  L229       MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:16:02,200 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2023-11-29 01:16:11,976 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:16:12,227 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39072 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:16:12,306 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:16:15,231 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:16:15,231 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:16:15,231 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:16:15,231 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659391509]
[2023-11-29 01:16:15,231 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:16:15,231 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738113082]
[2023-11-29 01:16:15,231 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738113082] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:16:15,231 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:16:15,232 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:16:15,233 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626322480]
[2023-11-29 01:16:15,233 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:16:15,236 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:16:15,236 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:16:15,239 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:16:15,239 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:16:15,240 INFO  L87              Difference]: Start difference. First operand 6806 states and 11352 transitions. Second operand  has 4 states, 4 states have (on average 1125.0) internal successors, (4500), 3 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:16:20,434 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:16:20,434 INFO  L93              Difference]: Finished difference Result 14741 states and 24581 transitions.
[2023-11-29 01:16:20,434 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:16:20,435 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1125.0) internal successors, (4500), 3 states have internal predecessors, (4500), 0 states have call successors, (0), 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 4500
[2023-11-29 01:16:20,437 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:16:20,443 INFO  L225             Difference]: With dead ends: 14741
[2023-11-29 01:16:20,443 INFO  L226             Difference]: Without dead ends: 8197
[2023-11-29 01:16:20,445 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4500 GetRequests, 4497 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:16:20,446 INFO  L413           NwaCegarLoop]: 9710 mSDtfsCounter, 21073 mSDsluCounter, 2075 mSDsCounter, 0 mSdLazyCounter, 4621 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21073 SdHoareTripleChecker+Valid, 11785 SdHoareTripleChecker+Invalid, 4621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time
[2023-11-29 01:16:20,446 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21073 Valid, 11785 Invalid, 4621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4621 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time]
[2023-11-29 01:16:20,453 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8197 states.
[2023-11-29 01:16:20,506 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8197 to 6806.
[2023-11-29 01:16:20,513 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.6680382072005877) internal successors, (11351), 6805 states have internal predecessors, (11351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:16:20,527 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11351 transitions.
[2023-11-29 01:16:20,527 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11351 transitions. Word has length 4500
[2023-11-29 01:16:20,530 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:16:20,530 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11351 transitions.
[2023-11-29 01:16:20,531 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1125.0) internal successors, (4500), 3 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:16:20,531 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11351 transitions.
[2023-11-29 01:16:20,627 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4502
[2023-11-29 01:16:20,628 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:16:20,629 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 01:16:20,743 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0
[2023-11-29 01:16:20,829 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2023-11-29 01:16:20,830 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:16:20,830 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:16:20,832 INFO  L85        PathProgramCache]: Analyzing trace with hash -674112983, now seen corresponding path program 1 times
[2023-11-29 01:16:20,832 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:16:20,832 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004862511]
[2023-11-29 01:16:20,832 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:16:20,832 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:16:21,385 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:16:21,386 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [831249807]
[2023-11-29 01:16:21,386 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:16:21,387 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:16:21,387 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:16:21,387 INFO  L229       MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:16:21,389 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2023-11-29 01:16:31,054 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:16:31,294 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39073 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:16:31,374 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:16:34,248 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:16:34,249 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:16:34,249 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:16:34,249 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004862511]
[2023-11-29 01:16:34,249 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:16:34,249 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831249807]
[2023-11-29 01:16:34,249 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [831249807] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:16:34,249 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:16:34,251 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:16:34,251 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570066367]
[2023-11-29 01:16:34,251 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:16:34,255 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:16:34,255 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:16:34,258 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:16:34,258 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:16:34,259 INFO  L87              Difference]: Start difference. First operand 6806 states and 11351 transitions. Second operand  has 4 states, 4 states have (on average 1125.25) internal successors, (4501), 3 states have internal predecessors, (4501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:16:39,660 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:16:39,660 INFO  L93              Difference]: Finished difference Result 14745 states and 24585 transitions.
[2023-11-29 01:16:39,661 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:16:39,662 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1125.25) internal successors, (4501), 3 states have internal predecessors, (4501), 0 states have call successors, (0), 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 4501
[2023-11-29 01:16:39,663 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:16:39,669 INFO  L225             Difference]: With dead ends: 14745
[2023-11-29 01:16:39,669 INFO  L226             Difference]: Without dead ends: 8201
[2023-11-29 01:16:39,673 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4501 GetRequests, 4498 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:16:39,674 INFO  L413           NwaCegarLoop]: 9714 mSDtfsCounter, 21068 mSDsluCounter, 2080 mSDsCounter, 0 mSdLazyCounter, 4623 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21068 SdHoareTripleChecker+Valid, 11794 SdHoareTripleChecker+Invalid, 4623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time
[2023-11-29 01:16:39,674 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21068 Valid, 11794 Invalid, 4623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4623 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time]
[2023-11-29 01:16:39,684 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8201 states.
[2023-11-29 01:16:39,746 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8201 to 6806.
[2023-11-29 01:16:39,751 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.6678912564290962) internal successors, (11350), 6805 states have internal predecessors, (11350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:16:39,759 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11350 transitions.
[2023-11-29 01:16:39,759 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11350 transitions. Word has length 4501
[2023-11-29 01:16:39,760 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:16:39,760 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11350 transitions.
[2023-11-29 01:16:39,761 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1125.25) internal successors, (4501), 3 states have internal predecessors, (4501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:16:39,761 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11350 transitions.
[2023-11-29 01:16:39,846 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4503
[2023-11-29 01:16:39,846 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:16:39,848 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 01:16:39,948 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0
[2023-11-29 01:16:40,048 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2023-11-29 01:16:40,048 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:16:40,049 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:16:40,050 INFO  L85        PathProgramCache]: Analyzing trace with hash -764360162, now seen corresponding path program 1 times
[2023-11-29 01:16:40,050 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:16:40,050 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44608337]
[2023-11-29 01:16:40,051 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:16:40,051 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:16:40,593 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:16:40,593 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [616116902]
[2023-11-29 01:16:40,594 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:16:40,594 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:16:40,594 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:16:40,595 INFO  L229       MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:16:40,596 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2023-11-29 01:16:50,359 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:16:50,610 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39074 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:16:50,689 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:16:54,505 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:16:54,505 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:16:54,505 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:16:54,506 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44608337]
[2023-11-29 01:16:54,506 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:16:54,506 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616116902]
[2023-11-29 01:16:54,506 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [616116902] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:16:54,506 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:16:54,507 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:16:54,507 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564114370]
[2023-11-29 01:16:54,507 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:16:54,511 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:16:54,511 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:16:54,514 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:16:54,514 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:16:54,515 INFO  L87              Difference]: Start difference. First operand 6806 states and 11350 transitions. Second operand  has 4 states, 4 states have (on average 1125.5) internal successors, (4502), 3 states have internal predecessors, (4502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:17:00,055 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:17:00,055 INFO  L93              Difference]: Finished difference Result 15181 states and 25309 transitions.
[2023-11-29 01:17:00,056 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:17:00,057 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1125.5) internal successors, (4502), 3 states have internal predecessors, (4502), 0 states have call successors, (0), 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 4502
[2023-11-29 01:17:00,058 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:17:00,065 INFO  L225             Difference]: With dead ends: 15181
[2023-11-29 01:17:00,065 INFO  L226             Difference]: Without dead ends: 8637
[2023-11-29 01:17:00,069 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4502 GetRequests, 4499 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:17:00,070 INFO  L413           NwaCegarLoop]: 10199 mSDtfsCounter, 20775 mSDsluCounter, 2566 mSDsCounter, 0 mSdLazyCounter, 5103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20775 SdHoareTripleChecker+Valid, 12765 SdHoareTripleChecker+Invalid, 5103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time
[2023-11-29 01:17:00,070 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [20775 Valid, 12765 Invalid, 5103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5103 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time]
[2023-11-29 01:17:00,078 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8637 states.
[2023-11-29 01:17:00,130 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8637 to 6806.
[2023-11-29 01:17:00,136 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.6677443056576047) internal successors, (11349), 6805 states have internal predecessors, (11349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:17:00,143 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11349 transitions.
[2023-11-29 01:17:00,144 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11349 transitions. Word has length 4502
[2023-11-29 01:17:00,145 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:17:00,145 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11349 transitions.
[2023-11-29 01:17:00,146 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1125.5) internal successors, (4502), 3 states have internal predecessors, (4502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:17:00,146 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11349 transitions.
[2023-11-29 01:17:00,232 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4504
[2023-11-29 01:17:00,232 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:17:00,234 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 01:17:00,342 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0
[2023-11-29 01:17:00,434 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16
[2023-11-29 01:17:00,435 INFO  L420      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:17:00,435 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:17:00,436 INFO  L85        PathProgramCache]: Analyzing trace with hash 994989918, now seen corresponding path program 1 times
[2023-11-29 01:17:00,437 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:17:00,437 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009821274]
[2023-11-29 01:17:00,437 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:17:00,437 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:17:01,035 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:17:01,035 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1375928797]
[2023-11-29 01:17:01,036 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:17:01,036 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:17:01,036 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:17:01,037 INFO  L229       MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:17:01,038 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2023-11-29 01:17:10,712 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:17:10,955 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39075 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:17:11,032 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:17:14,929 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:17:14,929 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:17:14,929 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:17:14,929 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009821274]
[2023-11-29 01:17:14,929 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:17:14,929 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375928797]
[2023-11-29 01:17:14,929 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375928797] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:17:14,929 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:17:14,931 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:17:14,931 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190229384]
[2023-11-29 01:17:14,931 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:17:14,935 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:17:14,935 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:17:14,940 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:17:14,940 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:17:14,941 INFO  L87              Difference]: Start difference. First operand 6806 states and 11349 transitions. Second operand  has 4 states, 4 states have (on average 1125.75) internal successors, (4503), 3 states have internal predecessors, (4503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:17:20,788 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:17:20,788 INFO  L93              Difference]: Finished difference Result 15185 states and 25313 transitions.
[2023-11-29 01:17:20,789 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:17:20,790 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1125.75) internal successors, (4503), 3 states have internal predecessors, (4503), 0 states have call successors, (0), 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 4503
[2023-11-29 01:17:20,791 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:17:20,797 INFO  L225             Difference]: With dead ends: 15185
[2023-11-29 01:17:20,797 INFO  L226             Difference]: Without dead ends: 8641
[2023-11-29 01:17:20,799 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4503 GetRequests, 4500 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:17:20,800 INFO  L413           NwaCegarLoop]: 10203 mSDtfsCounter, 20770 mSDsluCounter, 2571 mSDsCounter, 0 mSdLazyCounter, 5105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20770 SdHoareTripleChecker+Valid, 12774 SdHoareTripleChecker+Invalid, 5105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time
[2023-11-29 01:17:20,800 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [20770 Valid, 12774 Invalid, 5105 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 5105 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time]
[2023-11-29 01:17:20,807 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8641 states.
[2023-11-29 01:17:20,852 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8641 to 6806.
[2023-11-29 01:17:20,857 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.6675973548861132) internal successors, (11348), 6805 states have internal predecessors, (11348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:17:20,865 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11348 transitions.
[2023-11-29 01:17:20,865 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11348 transitions. Word has length 4503
[2023-11-29 01:17:20,866 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:17:20,866 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11348 transitions.
[2023-11-29 01:17:20,867 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1125.75) internal successors, (4503), 3 states have internal predecessors, (4503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:17:20,867 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11348 transitions.
[2023-11-29 01:17:20,951 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4505
[2023-11-29 01:17:20,951 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:17:20,953 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 01:17:21,068 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0
[2023-11-29 01:17:21,153 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17
[2023-11-29 01:17:21,154 INFO  L420      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:17:21,154 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:17:21,156 INFO  L85        PathProgramCache]: Analyzing trace with hash -104204461, now seen corresponding path program 1 times
[2023-11-29 01:17:21,157 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:17:21,157 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990803322]
[2023-11-29 01:17:21,157 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:17:21,157 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:17:21,724 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:17:21,724 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588804069]
[2023-11-29 01:17:21,725 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:17:21,725 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:17:21,725 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:17:21,726 INFO  L229       MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:17:21,727 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process
[2023-11-29 01:17:31,450 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:17:31,690 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39076 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:17:31,759 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:17:36,624 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:17:36,624 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:17:36,625 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:17:36,625 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990803322]
[2023-11-29 01:17:36,625 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:17:36,625 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588804069]
[2023-11-29 01:17:36,625 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588804069] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:17:36,625 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:17:36,627 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:17:36,627 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860620989]
[2023-11-29 01:17:36,627 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:17:36,630 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:17:36,630 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:17:36,634 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:17:36,634 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:17:36,636 INFO  L87              Difference]: Start difference. First operand 6806 states and 11348 transitions. Second operand  has 4 states, 4 states have (on average 1126.0) internal successors, (4504), 3 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:17:43,048 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:17:43,048 INFO  L93              Difference]: Finished difference Result 15621 states and 26037 transitions.
[2023-11-29 01:17:43,049 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:17:43,049 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1126.0) internal successors, (4504), 3 states have internal predecessors, (4504), 0 states have call successors, (0), 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 4504
[2023-11-29 01:17:43,051 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:17:43,057 INFO  L225             Difference]: With dead ends: 15621
[2023-11-29 01:17:43,057 INFO  L226             Difference]: Without dead ends: 9077
[2023-11-29 01:17:43,059 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4504 GetRequests, 4501 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:17:43,059 INFO  L413           NwaCegarLoop]: 10688 mSDtfsCounter, 20477 mSDsluCounter, 3057 mSDsCounter, 0 mSdLazyCounter, 5585 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20477 SdHoareTripleChecker+Valid, 13745 SdHoareTripleChecker+Invalid, 5585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time
[2023-11-29 01:17:43,059 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [20477 Valid, 13745 Invalid, 5585 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 5585 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time]
[2023-11-29 01:17:43,065 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9077 states.
[2023-11-29 01:17:43,108 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9077 to 6806.
[2023-11-29 01:17:43,112 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.6674504041146216) internal successors, (11347), 6805 states have internal predecessors, (11347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:17:43,120 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11347 transitions.
[2023-11-29 01:17:43,120 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11347 transitions. Word has length 4504
[2023-11-29 01:17:43,121 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:17:43,121 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11347 transitions.
[2023-11-29 01:17:43,122 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1126.0) internal successors, (4504), 3 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:17:43,122 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11347 transitions.
[2023-11-29 01:17:43,205 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4506
[2023-11-29 01:17:43,205 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:17:43,206 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 01:17:43,302 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0
[2023-11-29 01:17:43,407 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:17:43,407 INFO  L420      AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:17:43,408 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:17:43,409 INFO  L85        PathProgramCache]: Analyzing trace with hash 379034387, now seen corresponding path program 1 times
[2023-11-29 01:17:43,409 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:17:43,409 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131758626]
[2023-11-29 01:17:43,411 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:17:43,411 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:17:43,923 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:17:43,923 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [64239730]
[2023-11-29 01:17:43,924 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:17:43,924 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:17:43,924 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:17:43,925 INFO  L229       MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:17:43,926 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process
[2023-11-29 01:17:53,879 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:17:54,152 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39077 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:17:54,242 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:17:59,182 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:17:59,182 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:17:59,182 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:17:59,182 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131758626]
[2023-11-29 01:17:59,182 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:17:59,182 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64239730]
[2023-11-29 01:17:59,183 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [64239730] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:17:59,183 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:17:59,184 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:17:59,185 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507365966]
[2023-11-29 01:17:59,185 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:17:59,187 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:17:59,187 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:17:59,190 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:17:59,190 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:17:59,191 INFO  L87              Difference]: Start difference. First operand 6806 states and 11347 transitions. Second operand  has 4 states, 4 states have (on average 1126.25) internal successors, (4505), 3 states have internal predecessors, (4505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:18:05,143 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:18:05,144 INFO  L93              Difference]: Finished difference Result 15625 states and 26041 transitions.
[2023-11-29 01:18:05,145 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:18:05,146 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1126.25) internal successors, (4505), 3 states have internal predecessors, (4505), 0 states have call successors, (0), 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 4505
[2023-11-29 01:18:05,147 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:18:05,153 INFO  L225             Difference]: With dead ends: 15625
[2023-11-29 01:18:05,153 INFO  L226             Difference]: Without dead ends: 9081
[2023-11-29 01:18:05,156 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4505 GetRequests, 4502 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:18:05,157 INFO  L413           NwaCegarLoop]: 10692 mSDtfsCounter, 20472 mSDsluCounter, 3062 mSDsCounter, 0 mSdLazyCounter, 5587 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20472 SdHoareTripleChecker+Valid, 13754 SdHoareTripleChecker+Invalid, 5587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time
[2023-11-29 01:18:05,157 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [20472 Valid, 13754 Invalid, 5587 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 5587 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time]
[2023-11-29 01:18:05,167 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9081 states.
[2023-11-29 01:18:05,215 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9081 to 6806.
[2023-11-29 01:18:05,220 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.6673034533431301) internal successors, (11346), 6805 states have internal predecessors, (11346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:18:05,227 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11346 transitions.
[2023-11-29 01:18:05,227 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11346 transitions. Word has length 4505
[2023-11-29 01:18:05,228 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:18:05,228 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11346 transitions.
[2023-11-29 01:18:05,229 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1126.25) internal successors, (4505), 3 states have internal predecessors, (4505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:18:05,229 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11346 transitions.
[2023-11-29 01:18:05,313 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4507
[2023-11-29 01:18:05,313 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:18:05,314 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 01:18:05,421 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0
[2023-11-29 01:18:05,514 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:18:05,515 INFO  L420      AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:18:05,515 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:18:05,516 INFO  L85        PathProgramCache]: Analyzing trace with hash -1086354680, now seen corresponding path program 1 times
[2023-11-29 01:18:05,516 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:18:05,516 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358206356]
[2023-11-29 01:18:05,517 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:18:05,517 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:18:06,116 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:18:06,116 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281683120]
[2023-11-29 01:18:06,117 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:18:06,117 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:18:06,117 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:18:06,118 INFO  L229       MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:18:06,119 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process
[2023-11-29 01:18:15,951 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:18:16,192 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39078 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:18:16,260 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:18:21,282 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:18:21,282 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:18:21,282 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:18:21,282 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358206356]
[2023-11-29 01:18:21,282 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:18:21,282 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281683120]
[2023-11-29 01:18:21,282 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [281683120] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:18:21,282 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:18:21,283 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:18:21,284 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260698733]
[2023-11-29 01:18:21,284 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:18:21,518 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:18:21,518 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:18:21,522 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:18:21,522 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:18:21,523 INFO  L87              Difference]: Start difference. First operand 6806 states and 11346 transitions. Second operand  has 4 states, 4 states have (on average 1126.5) internal successors, (4506), 3 states have internal predecessors, (4506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:18:27,760 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:18:27,760 INFO  L93              Difference]: Finished difference Result 15773 states and 26285 transitions.
[2023-11-29 01:18:27,760 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:18:27,761 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1126.5) internal successors, (4506), 3 states have internal predecessors, (4506), 0 states have call successors, (0), 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 4506
[2023-11-29 01:18:27,763 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:18:27,772 INFO  L225             Difference]: With dead ends: 15773
[2023-11-29 01:18:27,772 INFO  L226             Difference]: Without dead ends: 9229
[2023-11-29 01:18:27,776 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4506 GetRequests, 4503 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:18:27,777 INFO  L413           NwaCegarLoop]: 10857 mSDtfsCounter, 20371 mSDsluCounter, 3228 mSDsCounter, 0 mSdLazyCounter, 5747 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20371 SdHoareTripleChecker+Valid, 14085 SdHoareTripleChecker+Invalid, 5747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time
[2023-11-29 01:18:27,777 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [20371 Valid, 14085 Invalid, 5747 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 5747 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time]
[2023-11-29 01:18:27,785 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9229 states.
[2023-11-29 01:18:27,837 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9229 to 6806.
[2023-11-29 01:18:27,842 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.6671565025716386) internal successors, (11345), 6805 states have internal predecessors, (11345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:18:27,849 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11345 transitions.
[2023-11-29 01:18:27,850 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11345 transitions. Word has length 4506
[2023-11-29 01:18:27,851 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:18:27,851 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11345 transitions.
[2023-11-29 01:18:27,851 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1126.5) internal successors, (4506), 3 states have internal predecessors, (4506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:18:27,852 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11345 transitions.
[2023-11-29 01:18:27,964 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4508
[2023-11-29 01:18:27,965 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:18:27,965 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 01:18:28,069 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0
[2023-11-29 01:18:28,166 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20
[2023-11-29 01:18:28,166 INFO  L420      AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:18:28,166 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:18:28,167 INFO  L85        PathProgramCache]: Analyzing trace with hash -1727624312, now seen corresponding path program 1 times
[2023-11-29 01:18:28,167 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:18:28,167 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770961467]
[2023-11-29 01:18:28,168 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:18:28,168 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:18:28,741 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:18:28,741 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003937649]
[2023-11-29 01:18:28,742 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:18:28,743 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:18:28,743 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:18:28,744 INFO  L229       MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:18:28,746 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process
[2023-11-29 01:18:38,541 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:18:38,763 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39079 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:18:38,830 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:18:45,592 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:18:45,592 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:18:45,592 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:18:45,592 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770961467]
[2023-11-29 01:18:45,592 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:18:45,593 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003937649]
[2023-11-29 01:18:45,593 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003937649] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:18:45,593 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:18:45,594 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:18:45,595 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227590821]
[2023-11-29 01:18:45,595 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:18:45,597 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:18:45,597 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:18:45,600 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:18:45,600 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:18:45,601 INFO  L87              Difference]: Start difference. First operand 6806 states and 11345 transitions. Second operand  has 4 states, 4 states have (on average 1126.75) internal successors, (4507), 3 states have internal predecessors, (4507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:18:52,210 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:18:52,211 INFO  L93              Difference]: Finished difference Result 15777 states and 26289 transitions.
[2023-11-29 01:18:52,212 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:18:52,213 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1126.75) internal successors, (4507), 3 states have internal predecessors, (4507), 0 states have call successors, (0), 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 4507
[2023-11-29 01:18:52,215 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:18:52,223 INFO  L225             Difference]: With dead ends: 15777
[2023-11-29 01:18:52,223 INFO  L226             Difference]: Without dead ends: 9233
[2023-11-29 01:18:52,227 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4507 GetRequests, 4504 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:18:52,228 INFO  L413           NwaCegarLoop]: 10861 mSDtfsCounter, 20366 mSDsluCounter, 3233 mSDsCounter, 0 mSdLazyCounter, 5749 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20366 SdHoareTripleChecker+Valid, 14094 SdHoareTripleChecker+Invalid, 5749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time
[2023-11-29 01:18:52,228 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [20366 Valid, 14094 Invalid, 5749 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 5749 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time]
[2023-11-29 01:18:52,237 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9233 states.
[2023-11-29 01:18:52,296 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9233 to 6806.
[2023-11-29 01:18:52,302 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.6670095518001469) internal successors, (11344), 6805 states have internal predecessors, (11344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:18:52,310 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11344 transitions.
[2023-11-29 01:18:52,310 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11344 transitions. Word has length 4507
[2023-11-29 01:18:52,311 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:18:52,311 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11344 transitions.
[2023-11-29 01:18:52,312 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1126.75) internal successors, (4507), 3 states have internal predecessors, (4507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:18:52,312 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11344 transitions.
[2023-11-29 01:18:52,528 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4509
[2023-11-29 01:18:52,529 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:18:52,530 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 01:18:52,649 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0
[2023-11-29 01:18:52,730 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21
[2023-11-29 01:18:52,731 INFO  L420      AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:18:52,734 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:18:52,735 INFO  L85        PathProgramCache]: Analyzing trace with hash 1443829053, now seen corresponding path program 1 times
[2023-11-29 01:18:52,735 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:18:52,735 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824652086]
[2023-11-29 01:18:52,735 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:18:52,735 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:18:53,467 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:18:53,467 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [500741545]
[2023-11-29 01:18:53,469 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:18:53,469 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:18:53,469 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:18:53,470 INFO  L229       MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:18:53,471 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process
[2023-11-29 01:19:03,776 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:19:04,034 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39080 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:19:04,109 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:19:10,829 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:19:10,829 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:19:10,829 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:19:10,829 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824652086]
[2023-11-29 01:19:10,829 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:19:10,829 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500741545]
[2023-11-29 01:19:10,829 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [500741545] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:19:10,829 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:19:10,831 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:19:10,831 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501096531]
[2023-11-29 01:19:10,831 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:19:10,834 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:19:10,834 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:19:10,836 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:19:10,836 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:19:10,837 INFO  L87              Difference]: Start difference. First operand 6806 states and 11344 transitions. Second operand  has 4 states, 4 states have (on average 1127.0) internal successors, (4508), 3 states have internal predecessors, (4508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:19:17,581 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:19:17,581 INFO  L93              Difference]: Finished difference Result 15925 states and 26533 transitions.
[2023-11-29 01:19:17,582 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:19:17,583 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1127.0) internal successors, (4508), 3 states have internal predecessors, (4508), 0 states have call successors, (0), 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 4508
[2023-11-29 01:19:17,584 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:19:17,593 INFO  L225             Difference]: With dead ends: 15925
[2023-11-29 01:19:17,593 INFO  L226             Difference]: Without dead ends: 9381
[2023-11-29 01:19:17,596 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4508 GetRequests, 4505 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:19:17,597 INFO  L413           NwaCegarLoop]: 11026 mSDtfsCounter, 20265 mSDsluCounter, 3399 mSDsCounter, 0 mSdLazyCounter, 5909 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20265 SdHoareTripleChecker+Valid, 14425 SdHoareTripleChecker+Invalid, 5909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time
[2023-11-29 01:19:17,597 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [20265 Valid, 14425 Invalid, 5909 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 5909 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time]
[2023-11-29 01:19:17,605 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9381 states.
[2023-11-29 01:19:17,664 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9381 to 6806.
[2023-11-29 01:19:17,669 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.6668626010286554) internal successors, (11343), 6805 states have internal predecessors, (11343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:19:17,677 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11343 transitions.
[2023-11-29 01:19:17,678 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11343 transitions. Word has length 4508
[2023-11-29 01:19:17,679 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:19:17,679 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11343 transitions.
[2023-11-29 01:19:17,680 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1127.0) internal successors, (4508), 3 states have internal predecessors, (4508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:19:17,680 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11343 transitions.
[2023-11-29 01:19:17,764 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4510
[2023-11-29 01:19:17,764 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:19:17,765 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 01:19:17,882 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0
[2023-11-29 01:19:17,966 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:19:17,966 INFO  L420      AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:19:17,966 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:19:17,967 INFO  L85        PathProgramCache]: Analyzing trace with hash 79209085, now seen corresponding path program 1 times
[2023-11-29 01:19:17,967 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:19:17,967 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691431369]
[2023-11-29 01:19:17,968 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:19:17,968 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:19:18,531 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:19:18,531 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1879761736]
[2023-11-29 01:19:18,533 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:19:18,533 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:19:18,533 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:19:18,534 INFO  L229       MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:19:18,535 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process
[2023-11-29 01:19:29,067 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:19:29,305 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39081 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:19:29,376 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:19:35,433 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:19:35,433 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:19:35,434 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:19:35,434 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691431369]
[2023-11-29 01:19:35,434 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:19:35,434 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879761736]
[2023-11-29 01:19:35,434 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879761736] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:19:35,434 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:19:35,436 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:19:35,436 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244938850]
[2023-11-29 01:19:35,436 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:19:35,438 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:19:35,438 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:19:35,441 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:19:35,441 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:19:35,442 INFO  L87              Difference]: Start difference. First operand 6806 states and 11343 transitions. Second operand  has 4 states, 4 states have (on average 1127.25) internal successors, (4509), 3 states have internal predecessors, (4509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:19:41,995 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:19:41,996 INFO  L93              Difference]: Finished difference Result 15929 states and 26537 transitions.
[2023-11-29 01:19:41,996 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:19:41,998 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1127.25) internal successors, (4509), 3 states have internal predecessors, (4509), 0 states have call successors, (0), 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 4509
[2023-11-29 01:19:41,999 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:19:42,007 INFO  L225             Difference]: With dead ends: 15929
[2023-11-29 01:19:42,007 INFO  L226             Difference]: Without dead ends: 9385
[2023-11-29 01:19:42,011 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4509 GetRequests, 4506 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:19:42,012 INFO  L413           NwaCegarLoop]: 11030 mSDtfsCounter, 20260 mSDsluCounter, 3404 mSDsCounter, 0 mSdLazyCounter, 5911 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20260 SdHoareTripleChecker+Valid, 14434 SdHoareTripleChecker+Invalid, 5911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time
[2023-11-29 01:19:42,012 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [20260 Valid, 14434 Invalid, 5911 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 5911 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time]
[2023-11-29 01:19:42,020 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9385 states.
[2023-11-29 01:19:42,074 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9385 to 6806.
[2023-11-29 01:19:42,080 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.6667156502571638) internal successors, (11342), 6805 states have internal predecessors, (11342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:19:42,087 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11342 transitions.
[2023-11-29 01:19:42,087 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11342 transitions. Word has length 4509
[2023-11-29 01:19:42,089 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:19:42,089 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11342 transitions.
[2023-11-29 01:19:42,090 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1127.25) internal successors, (4509), 3 states have internal predecessors, (4509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:19:42,091 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11342 transitions.
[2023-11-29 01:19:42,176 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4511
[2023-11-29 01:19:42,176 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:19:42,178 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 01:19:42,287 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0
[2023-11-29 01:19:42,378 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:19:42,379 INFO  L420      AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:19:42,379 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:19:42,380 INFO  L85        PathProgramCache]: Analyzing trace with hash 10474994, now seen corresponding path program 1 times
[2023-11-29 01:19:42,381 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:19:42,381 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054224684]
[2023-11-29 01:19:42,381 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:19:42,381 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:19:42,955 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:19:42,955 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392568213]
[2023-11-29 01:19:42,956 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:19:42,957 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:19:42,957 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:19:42,957 INFO  L229       MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:19:42,960 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process
[2023-11-29 01:19:53,254 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:19:53,504 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39082 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:19:53,580 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:20:00,085 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:20:00,085 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:20:00,085 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:20:00,085 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054224684]
[2023-11-29 01:20:00,086 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:20:00,086 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392568213]
[2023-11-29 01:20:00,086 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [392568213] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:20:00,086 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:20:00,088 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:20:00,088 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346026451]
[2023-11-29 01:20:00,088 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:20:00,090 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:20:00,090 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:20:00,093 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:20:00,093 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:20:00,094 INFO  L87              Difference]: Start difference. First operand 6806 states and 11342 transitions. Second operand  has 4 states, 4 states have (on average 1127.5) internal successors, (4510), 3 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:20:06,488 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:20:06,488 INFO  L93              Difference]: Finished difference Result 16077 states and 26781 transitions.
[2023-11-29 01:20:06,489 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:20:06,490 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1127.5) internal successors, (4510), 3 states have internal predecessors, (4510), 0 states have call successors, (0), 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 4510
[2023-11-29 01:20:06,492 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:20:06,501 INFO  L225             Difference]: With dead ends: 16077
[2023-11-29 01:20:06,501 INFO  L226             Difference]: Without dead ends: 9533
[2023-11-29 01:20:06,505 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4510 GetRequests, 4507 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:20:06,505 INFO  L413           NwaCegarLoop]: 11195 mSDtfsCounter, 20159 mSDsluCounter, 3570 mSDsCounter, 0 mSdLazyCounter, 6071 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20159 SdHoareTripleChecker+Valid, 14765 SdHoareTripleChecker+Invalid, 6071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time
[2023-11-29 01:20:06,505 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [20159 Valid, 14765 Invalid, 6071 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 6071 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time]
[2023-11-29 01:20:06,515 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9533 states.
[2023-11-29 01:20:06,695 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9533 to 6806.
[2023-11-29 01:20:06,700 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.6665686994856723) internal successors, (11341), 6805 states have internal predecessors, (11341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:20:06,709 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11341 transitions.
[2023-11-29 01:20:06,709 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11341 transitions. Word has length 4510
[2023-11-29 01:20:06,710 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:20:06,710 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11341 transitions.
[2023-11-29 01:20:06,711 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1127.5) internal successors, (4510), 3 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:20:06,711 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11341 transitions.
[2023-11-29 01:20:06,798 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4512
[2023-11-29 01:20:06,798 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:20:06,799 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 01:20:06,914 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0
[2023-11-29 01:20:06,999 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24
[2023-11-29 01:20:07,000 INFO  L420      AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:20:07,000 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:20:07,001 INFO  L85        PathProgramCache]: Analyzing trace with hash 1824071666, now seen corresponding path program 1 times
[2023-11-29 01:20:07,001 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:20:07,001 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846059935]
[2023-11-29 01:20:07,002 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:20:07,002 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:20:07,559 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:20:07,559 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [451992522]
[2023-11-29 01:20:07,560 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:20:07,560 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:20:07,561 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:20:07,561 INFO  L229       MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:20:07,562 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process
[2023-11-29 01:20:17,431 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:20:17,688 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39083 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:20:17,772 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:20:24,389 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:20:24,389 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:20:24,389 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:20:24,389 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846059935]
[2023-11-29 01:20:24,389 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:20:24,389 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451992522]
[2023-11-29 01:20:24,389 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [451992522] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:20:24,389 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:20:24,391 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:20:24,391 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455004147]
[2023-11-29 01:20:24,392 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:20:24,394 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:20:24,394 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:20:24,397 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:20:24,397 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:20:24,398 INFO  L87              Difference]: Start difference. First operand 6806 states and 11341 transitions. Second operand  has 4 states, 4 states have (on average 1127.75) internal successors, (4511), 3 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:20:31,086 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:20:31,086 INFO  L93              Difference]: Finished difference Result 16081 states and 26785 transitions.
[2023-11-29 01:20:31,087 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:20:31,088 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1127.75) internal successors, (4511), 3 states have internal predecessors, (4511), 0 states have call successors, (0), 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 4511
[2023-11-29 01:20:31,090 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:20:31,098 INFO  L225             Difference]: With dead ends: 16081
[2023-11-29 01:20:31,098 INFO  L226             Difference]: Without dead ends: 9537
[2023-11-29 01:20:31,102 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4511 GetRequests, 4508 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:20:31,102 INFO  L413           NwaCegarLoop]: 11199 mSDtfsCounter, 20154 mSDsluCounter, 3575 mSDsCounter, 0 mSdLazyCounter, 6073 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20154 SdHoareTripleChecker+Valid, 14774 SdHoareTripleChecker+Invalid, 6073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time
[2023-11-29 01:20:31,103 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [20154 Valid, 14774 Invalid, 6073 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 6073 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time]
[2023-11-29 01:20:31,112 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9537 states.
[2023-11-29 01:20:31,172 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9537 to 6806.
[2023-11-29 01:20:31,178 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.6664217487141808) internal successors, (11340), 6805 states have internal predecessors, (11340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:20:31,187 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11340 transitions.
[2023-11-29 01:20:31,187 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11340 transitions. Word has length 4511
[2023-11-29 01:20:31,188 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:20:31,188 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11340 transitions.
[2023-11-29 01:20:31,189 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1127.75) internal successors, (4511), 3 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:20:31,189 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11340 transitions.
[2023-11-29 01:20:31,282 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4513
[2023-11-29 01:20:31,282 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:20:31,283 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 01:20:31,398 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0
[2023-11-29 01:20:31,483 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:20:31,484 INFO  L420      AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:20:31,484 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:20:31,485 INFO  L85        PathProgramCache]: Analyzing trace with hash -411497177, now seen corresponding path program 1 times
[2023-11-29 01:20:31,485 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:20:31,485 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532437316]
[2023-11-29 01:20:31,486 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:20:31,486 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:20:32,055 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:20:32,055 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986749078]
[2023-11-29 01:20:32,056 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:20:32,056 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:20:32,056 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:20:32,057 INFO  L229       MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:20:32,058 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process
[2023-11-29 01:20:42,059 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:20:42,324 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39084 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:20:42,404 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:20:51,710 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:20:51,710 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:20:51,710 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:20:51,710 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532437316]
[2023-11-29 01:20:51,710 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:20:51,710 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986749078]
[2023-11-29 01:20:51,710 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [986749078] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:20:51,710 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:20:51,712 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:20:51,712 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319929373]
[2023-11-29 01:20:51,712 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:20:51,715 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:20:51,715 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:20:51,718 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:20:51,718 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:20:51,719 INFO  L87              Difference]: Start difference. First operand 6806 states and 11340 transitions. Second operand  has 4 states, 4 states have (on average 1128.0) internal successors, (4512), 3 states have internal predecessors, (4512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:20:58,923 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:20:58,923 INFO  L93              Difference]: Finished difference Result 16805 states and 27989 transitions.
[2023-11-29 01:20:58,924 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:20:58,924 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1128.0) internal successors, (4512), 3 states have internal predecessors, (4512), 0 states have call successors, (0), 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 4512
[2023-11-29 01:20:58,926 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:20:58,935 INFO  L225             Difference]: With dead ends: 16805
[2023-11-29 01:20:58,935 INFO  L226             Difference]: Without dead ends: 10261
[2023-11-29 01:20:58,939 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4512 GetRequests, 4509 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:20:58,939 INFO  L413           NwaCegarLoop]: 12004 mSDtfsCounter, 19669 mSDsluCounter, 4381 mSDsCounter, 0 mSdLazyCounter, 6873 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19669 SdHoareTripleChecker+Valid, 16385 SdHoareTripleChecker+Invalid, 6873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time
[2023-11-29 01:20:58,940 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [19669 Valid, 16385 Invalid, 6873 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 6873 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time]
[2023-11-29 01:20:58,949 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10261 states.
[2023-11-29 01:20:59,010 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10261 to 6806.
[2023-11-29 01:20:59,016 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.6662747979426893) internal successors, (11339), 6805 states have internal predecessors, (11339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:20:59,025 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11339 transitions.
[2023-11-29 01:20:59,025 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11339 transitions. Word has length 4512
[2023-11-29 01:20:59,026 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:20:59,026 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11339 transitions.
[2023-11-29 01:20:59,027 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1128.0) internal successors, (4512), 3 states have internal predecessors, (4512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:20:59,027 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11339 transitions.
[2023-11-29 01:20:59,116 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4514
[2023-11-29 01:20:59,116 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:20:59,117 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 01:20:59,232 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0
[2023-11-29 01:20:59,317 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26
[2023-11-29 01:20:59,318 INFO  L420      AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:20:59,318 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:20:59,319 INFO  L85        PathProgramCache]: Analyzing trace with hash 893728615, now seen corresponding path program 1 times
[2023-11-29 01:20:59,319 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:20:59,319 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085642820]
[2023-11-29 01:20:59,319 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:20:59,319 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:20:59,895 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:20:59,895 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [642973109]
[2023-11-29 01:20:59,896 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:20:59,896 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:20:59,896 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:20:59,897 INFO  L229       MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:20:59,898 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process
[2023-11-29 01:21:09,990 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:21:10,248 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39085 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:21:10,358 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:21:18,077 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:21:18,077 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:21:18,078 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:21:18,078 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085642820]
[2023-11-29 01:21:18,078 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:21:18,078 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642973109]
[2023-11-29 01:21:18,078 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [642973109] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:21:18,078 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:21:18,079 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:21:18,079 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80448531]
[2023-11-29 01:21:18,079 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:21:18,082 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:21:18,082 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:21:18,084 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:21:18,084 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:21:18,085 INFO  L87              Difference]: Start difference. First operand 6806 states and 11339 transitions. Second operand  has 4 states, 4 states have (on average 1128.25) internal successors, (4513), 3 states have internal predecessors, (4513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:21:25,418 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:21:25,418 INFO  L93              Difference]: Finished difference Result 16809 states and 27993 transitions.
[2023-11-29 01:21:25,419 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:21:25,420 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1128.25) internal successors, (4513), 3 states have internal predecessors, (4513), 0 states have call successors, (0), 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 4513
[2023-11-29 01:21:25,422 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:21:25,431 INFO  L225             Difference]: With dead ends: 16809
[2023-11-29 01:21:25,431 INFO  L226             Difference]: Without dead ends: 10265
[2023-11-29 01:21:25,436 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4513 GetRequests, 4510 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:21:25,436 INFO  L413           NwaCegarLoop]: 12008 mSDtfsCounter, 19664 mSDsluCounter, 4386 mSDsCounter, 0 mSdLazyCounter, 6875 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19664 SdHoareTripleChecker+Valid, 16394 SdHoareTripleChecker+Invalid, 6875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time
[2023-11-29 01:21:25,436 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [19664 Valid, 16394 Invalid, 6875 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 6875 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time]
[2023-11-29 01:21:25,446 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10265 states.
[2023-11-29 01:21:25,508 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10265 to 6806.
[2023-11-29 01:21:25,514 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.6661278471711976) internal successors, (11338), 6805 states have internal predecessors, (11338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:21:25,522 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11338 transitions.
[2023-11-29 01:21:25,522 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11338 transitions. Word has length 4513
[2023-11-29 01:21:25,524 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:21:25,524 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11338 transitions.
[2023-11-29 01:21:25,525 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1128.25) internal successors, (4513), 3 states have internal predecessors, (4513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:21:25,525 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11338 transitions.
[2023-11-29 01:21:25,619 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4515
[2023-11-29 01:21:25,619 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:21:25,621 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 01:21:25,737 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0
[2023-11-29 01:21:25,821 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:21:25,822 INFO  L420      AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:21:25,822 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:21:25,823 INFO  L85        PathProgramCache]: Analyzing trace with hash 443636444, now seen corresponding path program 1 times
[2023-11-29 01:21:25,823 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:21:25,824 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508151947]
[2023-11-29 01:21:25,824 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:21:25,825 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:21:26,414 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:21:26,414 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108152575]
[2023-11-29 01:21:26,415 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:21:26,415 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:21:26,415 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:21:26,416 INFO  L229       MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:21:26,417 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process
[2023-11-29 01:21:36,662 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:21:36,914 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39086 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:21:36,997 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:21:47,403 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:21:47,404 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:21:47,404 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:21:47,404 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508151947]
[2023-11-29 01:21:47,404 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:21:47,404 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108152575]
[2023-11-29 01:21:47,404 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [108152575] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:21:47,404 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:21:47,406 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:21:47,406 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632379693]
[2023-11-29 01:21:47,406 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:21:47,410 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:21:47,410 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:21:47,414 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:21:47,414 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:21:47,416 INFO  L87              Difference]: Start difference. First operand 6806 states and 11338 transitions. Second operand  has 4 states, 4 states have (on average 1128.5) internal successors, (4514), 3 states have internal predecessors, (4514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:21:54,705 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:21:54,706 INFO  L93              Difference]: Finished difference Result 16957 states and 28237 transitions.
[2023-11-29 01:21:54,706 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:21:54,707 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1128.5) internal successors, (4514), 3 states have internal predecessors, (4514), 0 states have call successors, (0), 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 4514
[2023-11-29 01:21:54,709 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:21:54,717 INFO  L225             Difference]: With dead ends: 16957
[2023-11-29 01:21:54,718 INFO  L226             Difference]: Without dead ends: 10413
[2023-11-29 01:21:54,722 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4514 GetRequests, 4511 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:21:54,722 INFO  L413           NwaCegarLoop]: 12173 mSDtfsCounter, 19563 mSDsluCounter, 4552 mSDsCounter, 0 mSdLazyCounter, 7035 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19563 SdHoareTripleChecker+Valid, 16725 SdHoareTripleChecker+Invalid, 7035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time
[2023-11-29 01:21:54,723 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [19563 Valid, 16725 Invalid, 7035 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 7035 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time]
[2023-11-29 01:21:54,732 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10413 states.
[2023-11-29 01:21:54,806 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10413 to 6806.
[2023-11-29 01:21:54,812 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.665980896399706) internal successors, (11337), 6805 states have internal predecessors, (11337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:21:54,821 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11337 transitions.
[2023-11-29 01:21:54,821 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11337 transitions. Word has length 4514
[2023-11-29 01:21:54,822 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:21:54,822 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11337 transitions.
[2023-11-29 01:21:54,823 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1128.5) internal successors, (4514), 3 states have internal predecessors, (4514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:21:54,823 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11337 transitions.
[2023-11-29 01:21:54,916 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4516
[2023-11-29 01:21:54,917 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:21:54,917 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 01:21:55,033 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0
[2023-11-29 01:21:55,118 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:21:55,118 INFO  L420      AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:21:55,119 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:21:55,119 INFO  L85        PathProgramCache]: Analyzing trace with hash 78168540, now seen corresponding path program 1 times
[2023-11-29 01:21:55,119 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:21:55,119 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679559102]
[2023-11-29 01:21:55,120 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:21:55,120 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:21:55,703 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:21:55,704 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279321954]
[2023-11-29 01:21:55,705 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:21:55,705 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:21:55,705 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:21:55,706 INFO  L229       MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:21:55,706 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process
[2023-11-29 01:22:05,883 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:22:06,142 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39087 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:22:06,223 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:22:16,719 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:22:16,719 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:22:16,719 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:22:16,720 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679559102]
[2023-11-29 01:22:16,720 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:22:16,720 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279321954]
[2023-11-29 01:22:16,720 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [279321954] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:22:16,720 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:22:16,721 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:22:16,722 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052659728]
[2023-11-29 01:22:16,722 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:22:16,726 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:22:16,726 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:22:16,730 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:22:16,730 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:22:16,731 INFO  L87              Difference]: Start difference. First operand 6806 states and 11337 transitions. Second operand  has 4 states, 4 states have (on average 1128.75) internal successors, (4515), 3 states have internal predecessors, (4515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:22:24,274 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:22:24,275 INFO  L93              Difference]: Finished difference Result 16961 states and 28241 transitions.
[2023-11-29 01:22:24,275 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:22:24,276 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1128.75) internal successors, (4515), 3 states have internal predecessors, (4515), 0 states have call successors, (0), 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 4515
[2023-11-29 01:22:24,279 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:22:24,286 INFO  L225             Difference]: With dead ends: 16961
[2023-11-29 01:22:24,286 INFO  L226             Difference]: Without dead ends: 10417
[2023-11-29 01:22:24,289 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4515 GetRequests, 4512 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:22:24,290 INFO  L413           NwaCegarLoop]: 12177 mSDtfsCounter, 19558 mSDsluCounter, 4557 mSDsCounter, 0 mSdLazyCounter, 7037 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19558 SdHoareTripleChecker+Valid, 16734 SdHoareTripleChecker+Invalid, 7037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time
[2023-11-29 01:22:24,290 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [19558 Valid, 16734 Invalid, 7037 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 7037 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time]
[2023-11-29 01:22:24,298 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10417 states.
[2023-11-29 01:22:24,355 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10417 to 6806.
[2023-11-29 01:22:24,361 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.6658339456282145) internal successors, (11336), 6805 states have internal predecessors, (11336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:22:24,370 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11336 transitions.
[2023-11-29 01:22:24,370 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11336 transitions. Word has length 4515
[2023-11-29 01:22:24,371 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:22:24,372 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11336 transitions.
[2023-11-29 01:22:24,372 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1128.75) internal successors, (4515), 3 states have internal predecessors, (4515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:22:24,372 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11336 transitions.
[2023-11-29 01:22:24,466 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4517
[2023-11-29 01:22:24,466 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:22:24,467 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 01:22:24,583 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0
[2023-11-29 01:22:24,667 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:22:24,667 INFO  L420      AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:22:24,668 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:22:24,668 INFO  L85        PathProgramCache]: Analyzing trace with hash -386097391, now seen corresponding path program 1 times
[2023-11-29 01:22:24,668 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:22:24,668 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679159502]
[2023-11-29 01:22:24,669 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:22:24,669 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:22:25,251 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:22:25,251 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105067213]
[2023-11-29 01:22:25,252 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:22:25,252 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:22:25,253 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:22:25,254 INFO  L229       MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:22:25,255 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process
[2023-11-29 01:22:35,516 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:22:35,774 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39088 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:22:35,864 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:22:46,818 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:22:46,818 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:22:46,818 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:22:46,819 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679159502]
[2023-11-29 01:22:46,819 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:22:46,819 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105067213]
[2023-11-29 01:22:46,819 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105067213] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:22:46,819 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:22:46,821 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:22:46,821 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106581455]
[2023-11-29 01:22:46,821 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:22:46,824 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:22:46,824 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:22:46,826 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:22:46,826 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:22:46,827 INFO  L87              Difference]: Start difference. First operand 6806 states and 11336 transitions. Second operand  has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 3 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:22:54,414 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:22:54,414 INFO  L93              Difference]: Finished difference Result 17109 states and 28485 transitions.
[2023-11-29 01:22:54,414 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:22:54,415 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 3 states have internal predecessors, (4516), 0 states have call successors, (0), 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 4516
[2023-11-29 01:22:54,418 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:22:54,426 INFO  L225             Difference]: With dead ends: 17109
[2023-11-29 01:22:54,427 INFO  L226             Difference]: Without dead ends: 10565
[2023-11-29 01:22:54,431 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4516 GetRequests, 4513 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:22:54,431 INFO  L413           NwaCegarLoop]: 12342 mSDtfsCounter, 19457 mSDsluCounter, 4723 mSDsCounter, 0 mSdLazyCounter, 7197 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19457 SdHoareTripleChecker+Valid, 17065 SdHoareTripleChecker+Invalid, 7197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time
[2023-11-29 01:22:54,432 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [19457 Valid, 17065 Invalid, 7197 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 7197 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time]
[2023-11-29 01:22:54,445 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10565 states.
[2023-11-29 01:22:54,507 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10565 to 6806.
[2023-11-29 01:22:54,513 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.665686994856723) internal successors, (11335), 6805 states have internal predecessors, (11335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:22:54,522 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11335 transitions.
[2023-11-29 01:22:54,522 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11335 transitions. Word has length 4516
[2023-11-29 01:22:54,524 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:22:54,524 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11335 transitions.
[2023-11-29 01:22:54,525 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 3 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:22:54,525 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11335 transitions.
[2023-11-29 01:22:54,618 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4518
[2023-11-29 01:22:54,618 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:22:54,619 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 01:22:54,735 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0
[2023-11-29 01:22:54,819 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:22:54,820 INFO  L420      AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:22:54,820 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:22:54,821 INFO  L85        PathProgramCache]: Analyzing trace with hash -1118801199, now seen corresponding path program 1 times
[2023-11-29 01:22:54,821 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:22:54,821 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797731587]
[2023-11-29 01:22:54,821 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:22:54,821 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:22:55,405 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:22:55,405 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166971539]
[2023-11-29 01:22:55,406 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:22:55,406 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:22:55,406 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:22:55,407 INFO  L229       MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:22:55,408 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process
[2023-11-29 01:23:05,375 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:23:05,631 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39089 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:23:05,711 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:23:16,684 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:23:16,685 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:23:16,685 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:23:16,685 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797731587]
[2023-11-29 01:23:16,685 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:23:16,685 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166971539]
[2023-11-29 01:23:16,685 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [166971539] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:23:16,685 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:23:16,687 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:23:16,687 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220512590]
[2023-11-29 01:23:16,687 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:23:16,691 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:23:16,691 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:23:16,695 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:23:16,695 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:23:16,696 INFO  L87              Difference]: Start difference. First operand 6806 states and 11335 transitions. Second operand  has 4 states, 4 states have (on average 1129.25) internal successors, (4517), 3 states have internal predecessors, (4517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:23:24,328 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:23:24,328 INFO  L93              Difference]: Finished difference Result 17113 states and 28489 transitions.
[2023-11-29 01:23:24,329 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:23:24,330 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1129.25) internal successors, (4517), 3 states have internal predecessors, (4517), 0 states have call successors, (0), 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 4517
[2023-11-29 01:23:24,332 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:23:24,340 INFO  L225             Difference]: With dead ends: 17113
[2023-11-29 01:23:24,340 INFO  L226             Difference]: Without dead ends: 10569
[2023-11-29 01:23:24,343 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4517 GetRequests, 4514 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:23:24,343 INFO  L413           NwaCegarLoop]: 12346 mSDtfsCounter, 19452 mSDsluCounter, 4728 mSDsCounter, 0 mSdLazyCounter, 7199 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19452 SdHoareTripleChecker+Valid, 17074 SdHoareTripleChecker+Invalid, 7199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time
[2023-11-29 01:23:24,344 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [19452 Valid, 17074 Invalid, 7199 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 7199 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time]
[2023-11-29 01:23:24,352 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10569 states.
[2023-11-29 01:23:24,411 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10569 to 6806.
[2023-11-29 01:23:24,417 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.6655400440852315) internal successors, (11334), 6805 states have internal predecessors, (11334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:23:24,426 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11334 transitions.
[2023-11-29 01:23:24,426 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11334 transitions. Word has length 4517
[2023-11-29 01:23:24,428 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:23:24,428 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11334 transitions.
[2023-11-29 01:23:24,429 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1129.25) internal successors, (4517), 3 states have internal predecessors, (4517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:23:24,429 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11334 transitions.
[2023-11-29 01:23:24,523 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4519
[2023-11-29 01:23:24,523 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:23:24,524 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 01:23:24,639 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0
[2023-11-29 01:23:24,725 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:23:24,725 INFO  L420      AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:23:24,725 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:23:24,726 INFO  L85        PathProgramCache]: Analyzing trace with hash 1895963078, now seen corresponding path program 1 times
[2023-11-29 01:23:24,726 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:23:24,726 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825591007]
[2023-11-29 01:23:24,727 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:23:24,727 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:23:25,321 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:23:25,321 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1599474423]
[2023-11-29 01:23:25,322 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:23:25,322 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:23:25,323 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:23:25,323 INFO  L229       MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:23:25,324 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process
[2023-11-29 01:23:35,550 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:23:35,816 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39090 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:23:35,895 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:23:47,992 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:23:47,992 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:23:47,992 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:23:47,992 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825591007]
[2023-11-29 01:23:47,992 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:23:47,992 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599474423]
[2023-11-29 01:23:47,992 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599474423] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:23:47,992 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:23:47,994 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:23:47,995 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43773490]
[2023-11-29 01:23:47,995 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:23:47,997 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:23:47,997 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:23:48,000 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:23:48,000 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:23:48,001 INFO  L87              Difference]: Start difference. First operand 6806 states and 11334 transitions. Second operand  has 4 states, 4 states have (on average 1129.5) internal successors, (4518), 3 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:23:55,844 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:23:55,844 INFO  L93              Difference]: Finished difference Result 17261 states and 28733 transitions.
[2023-11-29 01:23:55,844 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:23:55,845 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1129.5) internal successors, (4518), 3 states have internal predecessors, (4518), 0 states have call successors, (0), 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 4518
[2023-11-29 01:23:55,848 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:23:55,856 INFO  L225             Difference]: With dead ends: 17261
[2023-11-29 01:23:55,856 INFO  L226             Difference]: Without dead ends: 10717
[2023-11-29 01:23:55,860 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4518 GetRequests, 4515 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:23:55,860 INFO  L413           NwaCegarLoop]: 12511 mSDtfsCounter, 19351 mSDsluCounter, 4894 mSDsCounter, 0 mSdLazyCounter, 7359 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19351 SdHoareTripleChecker+Valid, 17405 SdHoareTripleChecker+Invalid, 7359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time
[2023-11-29 01:23:55,860 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [19351 Valid, 17405 Invalid, 7359 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 7359 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time]
[2023-11-29 01:23:55,870 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10717 states.
[2023-11-29 01:23:55,931 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10717 to 6806.
[2023-11-29 01:23:55,936 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.66539309331374) internal successors, (11333), 6805 states have internal predecessors, (11333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:23:55,945 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11333 transitions.
[2023-11-29 01:23:55,945 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11333 transitions. Word has length 4518
[2023-11-29 01:23:55,947 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:23:55,947 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11333 transitions.
[2023-11-29 01:23:55,948 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1129.5) internal successors, (4518), 3 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:23:55,948 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11333 transitions.
[2023-11-29 01:23:56,042 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4520
[2023-11-29 01:23:56,042 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:23:56,043 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 01:23:56,159 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0
[2023-11-29 01:23:56,243 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:23:56,244 INFO  L420      AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:23:56,244 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:23:56,245 INFO  L85        PathProgramCache]: Analyzing trace with hash 1539803718, now seen corresponding path program 1 times
[2023-11-29 01:23:56,245 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:23:56,245 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134606932]
[2023-11-29 01:23:56,246 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:23:56,246 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:23:56,832 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:23:56,832 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [652186522]
[2023-11-29 01:23:56,833 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:23:56,833 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:23:56,833 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:23:56,834 INFO  L229       MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:23:56,835 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process
[2023-11-29 01:24:06,990 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:24:07,246 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39091 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:24:07,326 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:24:19,371 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:24:19,372 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:24:19,372 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:24:19,372 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134606932]
[2023-11-29 01:24:19,372 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:24:19,372 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652186522]
[2023-11-29 01:24:19,372 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [652186522] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:24:19,372 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:24:19,373 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:24:19,373 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966613893]
[2023-11-29 01:24:19,374 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:24:19,376 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:24:19,376 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:24:19,378 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:24:19,378 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:24:19,379 INFO  L87              Difference]: Start difference. First operand 6806 states and 11333 transitions. Second operand  has 4 states, 4 states have (on average 1129.75) internal successors, (4519), 3 states have internal predecessors, (4519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:24:26,862 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:24:26,863 INFO  L93              Difference]: Finished difference Result 17265 states and 28737 transitions.
[2023-11-29 01:24:26,863 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:24:26,864 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1129.75) internal successors, (4519), 3 states have internal predecessors, (4519), 0 states have call successors, (0), 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 4519
[2023-11-29 01:24:26,867 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:24:26,877 INFO  L225             Difference]: With dead ends: 17265
[2023-11-29 01:24:26,877 INFO  L226             Difference]: Without dead ends: 10721
[2023-11-29 01:24:26,882 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4519 GetRequests, 4516 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:24:26,882 INFO  L413           NwaCegarLoop]: 12515 mSDtfsCounter, 19346 mSDsluCounter, 4899 mSDsCounter, 0 mSdLazyCounter, 7361 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19346 SdHoareTripleChecker+Valid, 17414 SdHoareTripleChecker+Invalid, 7361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time
[2023-11-29 01:24:26,883 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [19346 Valid, 17414 Invalid, 7361 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 7361 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time]
[2023-11-29 01:24:26,894 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10721 states.
[2023-11-29 01:24:26,957 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10721 to 6806.
[2023-11-29 01:24:26,962 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.6652461425422485) internal successors, (11332), 6805 states have internal predecessors, (11332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:24:26,971 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11332 transitions.
[2023-11-29 01:24:26,971 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11332 transitions. Word has length 4519
[2023-11-29 01:24:26,973 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:24:26,973 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11332 transitions.
[2023-11-29 01:24:26,974 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1129.75) internal successors, (4519), 3 states have internal predecessors, (4519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:24:26,974 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11332 transitions.
[2023-11-29 01:24:27,067 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4521
[2023-11-29 01:24:27,067 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:24:27,068 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 01:24:27,183 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0
[2023-11-29 01:24:27,268 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33
[2023-11-29 01:24:27,269 INFO  L420      AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:24:27,269 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:24:27,269 INFO  L85        PathProgramCache]: Analyzing trace with hash -1232532741, now seen corresponding path program 1 times
[2023-11-29 01:24:27,270 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:24:27,270 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303343636]
[2023-11-29 01:24:27,270 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:24:27,270 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:24:27,854 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:24:27,855 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586948571]
[2023-11-29 01:24:27,856 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:24:27,856 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:24:27,856 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:24:27,857 INFO  L229       MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:24:27,857 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process
[2023-11-29 01:24:37,770 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:24:38,030 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39092 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:24:38,110 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:24:48,649 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:24:48,649 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:24:48,649 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:24:48,649 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303343636]
[2023-11-29 01:24:48,649 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:24:48,649 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586948571]
[2023-11-29 01:24:48,649 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [586948571] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:24:48,649 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:24:48,650 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:24:48,651 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296470436]
[2023-11-29 01:24:48,651 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:24:48,653 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:24:48,653 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:24:48,655 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:24:48,655 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:24:48,656 INFO  L87              Difference]: Start difference. First operand 6806 states and 11332 transitions. Second operand  has 4 states, 4 states have (on average 1130.0) internal successors, (4520), 3 states have internal predecessors, (4520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:24:56,316 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:24:56,316 INFO  L93              Difference]: Finished difference Result 17701 states and 29461 transitions.
[2023-11-29 01:24:56,317 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:24:56,318 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1130.0) internal successors, (4520), 3 states have internal predecessors, (4520), 0 states have call successors, (0), 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 4520
[2023-11-29 01:24:56,320 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:24:56,330 INFO  L225             Difference]: With dead ends: 17701
[2023-11-29 01:24:56,330 INFO  L226             Difference]: Without dead ends: 11157
[2023-11-29 01:24:56,335 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4520 GetRequests, 4517 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:24:56,335 INFO  L413           NwaCegarLoop]: 13000 mSDtfsCounter, 19053 mSDsluCounter, 5385 mSDsCounter, 0 mSdLazyCounter, 7841 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19053 SdHoareTripleChecker+Valid, 18385 SdHoareTripleChecker+Invalid, 7841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time
[2023-11-29 01:24:56,335 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [19053 Valid, 18385 Invalid, 7841 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 7841 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time]
[2023-11-29 01:24:56,346 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11157 states.
[2023-11-29 01:24:56,410 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11157 to 6806.
[2023-11-29 01:24:56,416 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.6650991917707567) internal successors, (11331), 6805 states have internal predecessors, (11331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:24:56,425 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11331 transitions.
[2023-11-29 01:24:56,425 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11331 transitions. Word has length 4520
[2023-11-29 01:24:56,427 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:24:56,427 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11331 transitions.
[2023-11-29 01:24:56,428 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1130.0) internal successors, (4520), 3 states have internal predecessors, (4520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:24:56,428 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11331 transitions.
[2023-11-29 01:24:56,521 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4522
[2023-11-29 01:24:56,521 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:24:56,522 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 01:24:56,636 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0
[2023-11-29 01:24:56,722 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34
[2023-11-29 01:24:56,723 INFO  L420      AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:24:56,723 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:24:56,724 INFO  L85        PathProgramCache]: Analyzing trace with hash -1315913221, now seen corresponding path program 1 times
[2023-11-29 01:24:56,724 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:24:56,724 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500606695]
[2023-11-29 01:24:56,725 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:24:56,725 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:24:57,312 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:24:57,313 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250949449]
[2023-11-29 01:24:57,313 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:24:57,314 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:24:57,314 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:24:57,315 INFO  L229       MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:24:57,316 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process
[2023-11-29 01:25:07,527 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:25:07,774 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39093 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:25:07,852 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:25:19,272 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 01:25:19,272 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 01:25:19,272 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:25:19,272 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500606695]
[2023-11-29 01:25:19,273 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:25:19,273 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250949449]
[2023-11-29 01:25:19,273 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [250949449] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 01:25:19,273 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 01:25:19,274 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 01:25:19,274 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721187876]
[2023-11-29 01:25:19,274 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:25:19,276 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 01:25:19,276 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:25:19,279 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 01:25:19,279 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 01:25:19,279 INFO  L87              Difference]: Start difference. First operand 6806 states and 11331 transitions. Second operand  has 4 states, 4 states have (on average 1130.25) internal successors, (4521), 3 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:25:27,346 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:25:27,346 INFO  L93              Difference]: Finished difference Result 17705 states and 29465 transitions.
[2023-11-29 01:25:27,347 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 01:25:27,348 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1130.25) internal successors, (4521), 3 states have internal predecessors, (4521), 0 states have call successors, (0), 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 4521
[2023-11-29 01:25:27,351 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:25:27,360 INFO  L225             Difference]: With dead ends: 17705
[2023-11-29 01:25:27,360 INFO  L226             Difference]: Without dead ends: 11161
[2023-11-29 01:25:27,365 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4521 GetRequests, 4518 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 01:25:27,365 INFO  L413           NwaCegarLoop]: 13004 mSDtfsCounter, 19048 mSDsluCounter, 5390 mSDsCounter, 0 mSdLazyCounter, 7843 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19048 SdHoareTripleChecker+Valid, 18394 SdHoareTripleChecker+Invalid, 7843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time
[2023-11-29 01:25:27,365 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [19048 Valid, 18394 Invalid, 7843 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 7843 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time]
[2023-11-29 01:25:27,376 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11161 states.
[2023-11-29 01:25:27,441 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11161 to 6806.
[2023-11-29 01:25:27,446 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6806 states, 6805 states have (on average 1.6649522409992652) internal successors, (11330), 6805 states have internal predecessors, (11330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:25:27,455 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 11330 transitions.
[2023-11-29 01:25:27,455 INFO  L78                 Accepts]: Start accepts. Automaton has 6806 states and 11330 transitions. Word has length 4521
[2023-11-29 01:25:27,457 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:25:27,457 INFO  L495      AbstractCegarLoop]: Abstraction has 6806 states and 11330 transitions.
[2023-11-29 01:25:27,458 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1130.25) internal successors, (4521), 3 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:25:27,458 INFO  L276                IsEmpty]: Start isEmpty. Operand 6806 states and 11330 transitions.
[2023-11-29 01:25:27,552 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4523
[2023-11-29 01:25:27,553 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:25:27,553 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 01:25:27,669 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0
[2023-11-29 01:25:27,754 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35
[2023-11-29 01:25:27,754 INFO  L420      AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:25:27,755 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:25:27,755 INFO  L85        PathProgramCache]: Analyzing trace with hash -479173968, now seen corresponding path program 1 times
[2023-11-29 01:25:27,755 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:25:27,755 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853271512]
[2023-11-29 01:25:27,756 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:25:27,756 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:25:28,345 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:25:28,345 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338757450]
[2023-11-29 01:25:28,346 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:25:28,346 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:25:28,346 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:25:28,347 INFO  L229       MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:25:28,348 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9531252-dfb2-4eb7-a466-98cc603e72f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process
[2023-11-29 01:25:38,451 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:25:38,707 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39094 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-29 01:25:38,791 INFO  L285         TraceCheckSpWp]: Computing forward predicates...