./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.4.prop6-back-serstep.c --full-output --architecture 64bit


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


Checking for ERROR reachability
Using default analysis
Version 0e0057cc
Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/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_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.4.prop6-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/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_2e07f77e-d96d-41c2-80d1-e2a997deaa58/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 14fcf2eb598b978d68bd40c9210187d3be1cc70a688dfb8c4b12d3874ffacf6a
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-11-28 23:57:06,795 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-28 23:57:06,862 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-28 23:57:06,867 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-28 23:57:06,867 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-28 23:57:06,890 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-28 23:57:06,890 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-28 23:57:06,891 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-28 23:57:06,892 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-28 23:57:06,892 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-28 23:57:06,893 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-28 23:57:06,893 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-28 23:57:06,894 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-28 23:57:06,894 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-28 23:57:06,895 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-28 23:57:06,895 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-28 23:57:06,896 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-28 23:57:06,896 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-28 23:57:06,897 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-28 23:57:06,897 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-28 23:57:06,898 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-28 23:57:06,899 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-28 23:57:06,899 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-28 23:57:06,899 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-28 23:57:06,900 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-28 23:57:06,900 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-28 23:57:06,901 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-28 23:57:06,901 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-28 23:57:06,902 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-28 23:57:06,902 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-28 23:57:06,903 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-28 23:57:06,903 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-28 23:57:06,904 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-28 23:57:06,904 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-28 23:57:06,904 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-28 23:57:06,904 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-28 23:57:06,905 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-28 23:57:06,905 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-28 23:57:06,905 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-28 23:57:06,905 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_2e07f77e-d96d-41c2-80d1-e2a997deaa58/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_2e07f77e-d96d-41c2-80d1-e2a997deaa58/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 -> 14fcf2eb598b978d68bd40c9210187d3be1cc70a688dfb8c4b12d3874ffacf6a
[2023-11-28 23:57:07,117 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-28 23:57:07,138 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-28 23:57:07,140 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-28 23:57:07,142 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-28 23:57:07,142 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-28 23:57:07,143 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.4.prop6-back-serstep.c
[2023-11-28 23:57:09,881 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-28 23:57:10,391 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-28 23:57:10,392 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.4.prop6-back-serstep.c
[2023-11-28 23:57:10,442 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/data/65bf2fa81/2291a234ce6b4cbe9551200206ce99b8/FLAG0896a7bbd
[2023-11-28 23:57:10,455 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/data/65bf2fa81/2291a234ce6b4cbe9551200206ce99b8
[2023-11-28 23:57:10,457 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-28 23:57:10,459 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-28 23:57:10,460 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-28 23:57:10,461 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-28 23:57:10,465 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-28 23:57:10,466 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:57:10" (1/1) ...
[2023-11-28 23:57:10,467 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fbbea06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:10, skipping insertion in model container
[2023-11-28 23:57:10,467 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:57:10" (1/1) ...
[2023-11-28 23:57:10,677 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-28 23:57:10,951 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_2e07f77e-d96d-41c2-80d1-e2a997deaa58/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.4.prop6-back-serstep.c[1180,1193]
[2023-11-28 23:57:12,325 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-28 23:57:12,335 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-28 23:57:12,346 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_2e07f77e-d96d-41c2-80d1-e2a997deaa58/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.4.prop6-back-serstep.c[1180,1193]
[2023-11-28 23:57:13,324 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-28 23:57:13,338 INFO  L206         MainTranslator]: Completed translation
[2023-11-28 23:57:13,339 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:13 WrapperNode
[2023-11-28 23:57:13,339 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-28 23:57:13,340 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-28 23:57:13,340 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-28 23:57:13,340 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-28 23:57:13,348 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:13" (1/1) ...
[2023-11-28 23:57:13,578 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:13" (1/1) ...
[2023-11-28 23:57:16,759 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55700
[2023-11-28 23:57:16,759 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-28 23:57:16,760 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-28 23:57:16,760 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-28 23:57:16,761 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-28 23:57:16,770 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:13" (1/1) ...
[2023-11-28 23:57:16,770 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:13" (1/1) ...
[2023-11-28 23:57:17,612 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:13" (1/1) ...
[2023-11-28 23:57:18,001 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].
[2023-11-28 23:57:18,002 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:13" (1/1) ...
[2023-11-28 23:57:18,002 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:13" (1/1) ...
[2023-11-28 23:57:18,706 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:13" (1/1) ...
[2023-11-28 23:57:18,893 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:13" (1/1) ...
[2023-11-28 23:57:19,104 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:13" (1/1) ...
[2023-11-28 23:57:19,234 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:13" (1/1) ...
[2023-11-28 23:57:20,042 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-28 23:57:20,043 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-28 23:57:20,043 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-28 23:57:20,043 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-28 23:57:20,043 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:13" (1/1) ...
[2023-11-28 23:57:20,048 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-28 23:57:20,060 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:57:20,073 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2023-11-28 23:57:20,075 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2023-11-28 23:57:20,108 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-28 23:57:20,108 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-11-28 23:57:20,108 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-28 23:57:20,108 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-28 23:57:22,181 INFO  L241             CfgBuilder]: Building ICFG
[2023-11-28 23:57:22,183 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-28 23:57:45,505 INFO  L282             CfgBuilder]: Performing block encoding
[2023-11-28 23:57:46,089 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-28 23:57:46,089 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-28 23:57:46,095 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:57:46 BoogieIcfgContainer
[2023-11-28 23:57:46,095 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-28 23:57:46,098 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-28 23:57:46,098 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-28 23:57:46,101 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-28 23:57:46,101 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 11:57:10" (1/3) ...
[2023-11-28 23:57:46,102 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ca26fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:57:46, skipping insertion in model container
[2023-11-28 23:57:46,102 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:13" (2/3) ...
[2023-11-28 23:57:46,103 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ca26fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:57:46, skipping insertion in model container
[2023-11-28 23:57:46,103 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:57:46" (3/3) ...
[2023-11-28 23:57:46,104 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.pgm_protocol.4.prop6-back-serstep.c
[2023-11-28 23:57:46,122 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-28 23:57:46,123 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-28 23:57:46,338 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-28 23:57:46,345 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;@17e16eec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-28 23:57:46,346 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-28 23:57:46,383 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 12052 states, 12050 states have (on average 1.6668879668049792) internal successors, (20086), 12051 states have internal predecessors, (20086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:57:46,469 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1255
[2023-11-28 23:57:46,470 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:57:46,471 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:57:46,472 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:57:46,477 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:57:46,478 INFO  L85        PathProgramCache]: Analyzing trace with hash 513727700, now seen corresponding path program 1 times
[2023-11-28 23:57:46,488 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:57:46,488 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054683899]
[2023-11-28 23:57:46,489 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:57:46,489 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:57:47,649 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:57:53,642 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 23:57:53,642 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:57:53,642 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054683899]
[2023-11-28 23:57:53,643 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054683899] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:57:53,643 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:57:53,644 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 23:57:53,645 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334757262]
[2023-11-28 23:57:53,646 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:57:53,653 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 23:57:53,653 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:57:53,685 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 23:57:53,686 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 23:57:53,715 INFO  L87              Difference]: Start difference. First operand  has 12052 states, 12050 states have (on average 1.6668879668049792) internal successors, (20086), 12051 states have internal predecessors, (20086), 0 states have call successors, (0), 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 313.5) internal successors, (1254), 4 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:57:54,375 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:57:54,376 INFO  L93              Difference]: Finished difference Result 23581 states and 39303 transitions.
[2023-11-28 23:57:54,377 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 23:57:54,379 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 313.5) internal successors, (1254), 4 states have internal predecessors, (1254), 0 states have call successors, (0), 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 1254
[2023-11-28 23:57:54,387 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:57:54,465 INFO  L225             Difference]: With dead ends: 23581
[2023-11-28 23:57:54,465 INFO  L226             Difference]: Without dead ends: 12052
[2023-11-28 23:57:54,484 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
[2023-11-28 23:57:54,487 INFO  L413           NwaCegarLoop]: 20079 mSDtfsCounter, 1 mSDsluCounter, 40153 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 60232 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:57:54,489 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 60232 Invalid, 13 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:57:54,530 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12052 states.
[2023-11-28 23:57:54,765 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12052 to 12052.
[2023-11-28 23:57:54,794 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12052 states, 12051 states have (on average 1.6665836860011618) internal successors, (20084), 12051 states have internal predecessors, (20084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:57:54,845 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12052 states to 12052 states and 20084 transitions.
[2023-11-28 23:57:54,846 INFO  L78                 Accepts]: Start accepts. Automaton has 12052 states and 20084 transitions. Word has length 1254
[2023-11-28 23:57:54,849 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:57:54,850 INFO  L495      AbstractCegarLoop]: Abstraction has 12052 states and 20084 transitions.
[2023-11-28 23:57:54,851 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 313.5) internal successors, (1254), 4 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:57:54,851 INFO  L276                IsEmpty]: Start isEmpty. Operand 12052 states and 20084 transitions.
[2023-11-28 23:57:54,922 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1256
[2023-11-28 23:57:54,922 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:57:54,923 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:57:54,923 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-28 23:57:54,923 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:57:54,924 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:57:54,925 INFO  L85        PathProgramCache]: Analyzing trace with hash -1252578036, now seen corresponding path program 1 times
[2023-11-28 23:57:54,925 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:57:54,926 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665874889]
[2023-11-28 23:57:54,926 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:57:54,927 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:57:55,621 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:57:57,825 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 23:57:57,826 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:57:57,826 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665874889]
[2023-11-28 23:57:57,826 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665874889] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:57:57,826 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:57:57,827 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 23:57:57,827 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333430934]
[2023-11-28 23:57:57,827 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:57:57,831 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 23:57:57,831 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:57:57,833 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 23:57:57,834 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 23:57:57,835 INFO  L87              Difference]: Start difference. First operand 12052 states and 20084 transitions. Second operand  has 4 states, 4 states have (on average 313.75) internal successors, (1255), 4 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:57:58,451 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:57:58,451 INFO  L93              Difference]: Finished difference Result 23584 states and 39301 transitions.
[2023-11-28 23:57:58,452 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 23:57:58,453 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 313.75) internal successors, (1255), 4 states have internal predecessors, (1255), 0 states have call successors, (0), 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 1255
[2023-11-28 23:57:58,455 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:57:58,520 INFO  L225             Difference]: With dead ends: 23584
[2023-11-28 23:57:58,520 INFO  L226             Difference]: Without dead ends: 12055
[2023-11-28 23:57:58,535 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
[2023-11-28 23:57:58,536 INFO  L413           NwaCegarLoop]: 20079 mSDtfsCounter, 1 mSDsluCounter, 40151 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 60230 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
[2023-11-28 23:57:58,537 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 60230 Invalid, 15 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:57:58,561 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12055 states.
[2023-11-28 23:57:58,765 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12055 to 12054.
[2023-11-28 23:57:58,782 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12054 states, 12053 states have (on average 1.6664730772421803) internal successors, (20086), 12053 states have internal predecessors, (20086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:57:58,816 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12054 states to 12054 states and 20086 transitions.
[2023-11-28 23:57:58,816 INFO  L78                 Accepts]: Start accepts. Automaton has 12054 states and 20086 transitions. Word has length 1255
[2023-11-28 23:57:58,818 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:57:58,818 INFO  L495      AbstractCegarLoop]: Abstraction has 12054 states and 20086 transitions.
[2023-11-28 23:57:58,819 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 313.75) internal successors, (1255), 4 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:57:58,819 INFO  L276                IsEmpty]: Start isEmpty. Operand 12054 states and 20086 transitions.
[2023-11-28 23:57:58,835 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1257
[2023-11-28 23:57:58,836 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:57:58,837 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:57:58,837 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-28 23:57:58,837 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:57:58,838 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:57:58,838 INFO  L85        PathProgramCache]: Analyzing trace with hash -385638418, now seen corresponding path program 1 times
[2023-11-28 23:57:58,839 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:57:58,839 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165271725]
[2023-11-28 23:57:58,839 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:57:58,840 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:57:59,394 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:58:01,580 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 23:58:01,580 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:58:01,581 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165271725]
[2023-11-28 23:58:01,581 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165271725] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:58:01,581 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:58:01,582 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 23:58:01,582 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407226208]
[2023-11-28 23:58:01,582 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:58:01,584 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 23:58:01,584 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:58:01,585 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 23:58:01,586 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-28 23:58:01,586 INFO  L87              Difference]: Start difference. First operand 12054 states and 20086 transitions. Second operand  has 5 states, 5 states have (on average 251.2) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:58:02,246 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:58:02,246 INFO  L93              Difference]: Finished difference Result 36456 states and 60751 transitions.
[2023-11-28 23:58:02,247 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 23:58:02,247 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 251.2) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 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 1256
[2023-11-28 23:58:02,250 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:58:02,291 INFO  L225             Difference]: With dead ends: 36456
[2023-11-28 23:58:02,291 INFO  L226             Difference]: Without dead ends: 24925
[2023-11-28 23:58:02,307 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
[2023-11-28 23:58:02,308 INFO  L413           NwaCegarLoop]: 22323 mSDtfsCounter, 78689 mSDsluCounter, 40152 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78689 SdHoareTripleChecker+Valid, 62475 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:58:02,309 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [78689 Valid, 62475 Invalid, 16 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:58:02,337 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24925 states.
[2023-11-28 23:58:02,533 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24925 to 13403.
[2023-11-28 23:58:02,549 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13403 states, 13402 states have (on average 1.666393075660349) internal successors, (22333), 13402 states have internal predecessors, (22333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:58:02,564 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13403 states to 13403 states and 22333 transitions.
[2023-11-28 23:58:02,565 INFO  L78                 Accepts]: Start accepts. Automaton has 13403 states and 22333 transitions. Word has length 1256
[2023-11-28 23:58:02,566 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:58:02,566 INFO  L495      AbstractCegarLoop]: Abstraction has 13403 states and 22333 transitions.
[2023-11-28 23:58:02,567 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 251.2) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:58:02,567 INFO  L276                IsEmpty]: Start isEmpty. Operand 13403 states and 22333 transitions.
[2023-11-28 23:58:03,031 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8928
[2023-11-28 23:58:03,031 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:58:03,036 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:58:03,036 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-28 23:58:03,037 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:58:03,037 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:58:03,040 INFO  L85        PathProgramCache]: Analyzing trace with hash 1173782582, now seen corresponding path program 1 times
[2023-11-28 23:58:03,040 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:58:03,040 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728858433]
[2023-11-28 23:58:03,042 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:58:03,042 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:58:04,110 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:58:04,111 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [741047302]
[2023-11-28 23:58:04,112 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:58:04,112 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:58:04,113 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:58:04,114 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:58:04,116 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-28 23:58:16,604 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:58:16,879 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44668 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-28 23:58:17,083 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:58:17,337 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 904 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 23:58:17,337 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:58:17,337 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:58:17,338 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728858433]
[2023-11-28 23:58:17,338 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:58:17,338 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741047302]
[2023-11-28 23:58:17,338 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [741047302] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:58:17,338 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:58:17,341 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 23:58:17,341 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607578724]
[2023-11-28 23:58:17,342 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:58:17,351 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 23:58:17,351 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:58:17,357 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 23:58:17,357 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 23:58:17,360 INFO  L87              Difference]: Start difference. First operand 13403 states and 22333 transitions. Second operand  has 4 states, 4 states have (on average 2231.75) internal successors, (8927), 4 states have internal predecessors, (8927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:58:17,650 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:58:17,650 INFO  L93              Difference]: Finished difference Result 24944 states and 41564 transitions.
[2023-11-28 23:58:17,651 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 23:58:17,654 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2231.75) internal successors, (8927), 4 states have internal predecessors, (8927), 0 states have call successors, (0), 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 8927
[2023-11-28 23:58:17,659 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:58:17,684 INFO  L225             Difference]: With dead ends: 24944
[2023-11-28 23:58:17,685 INFO  L226             Difference]: Without dead ends: 13413
[2023-11-28 23:58:17,699 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8926 GetRequests, 8924 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 23:58:17,700 INFO  L413           NwaCegarLoop]: 20079 mSDtfsCounter, 12 mSDsluCounter, 40148 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 60227 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:58:17,700 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 60227 Invalid, 18 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:58:17,721 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13413 states.
[2023-11-28 23:58:17,897 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13413 to 13405.
[2023-11-28 23:58:17,914 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13405 states, 13404 states have (on average 1.6662936436884512) internal successors, (22335), 13404 states have internal predecessors, (22335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:58:17,935 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13405 states to 13405 states and 22335 transitions.
[2023-11-28 23:58:17,936 INFO  L78                 Accepts]: Start accepts. Automaton has 13405 states and 22335 transitions. Word has length 8927
[2023-11-28 23:58:17,941 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:58:17,941 INFO  L495      AbstractCegarLoop]: Abstraction has 13405 states and 22335 transitions.
[2023-11-28 23:58:17,945 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2231.75) internal successors, (8927), 4 states have internal predecessors, (8927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:58:17,945 INFO  L276                IsEmpty]: Start isEmpty. Operand 13405 states and 22335 transitions.
[2023-11-28 23:58:18,638 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8928
[2023-11-28 23:58:18,638 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:58:18,643 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:58:18,765 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-28 23:58:18,843 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:58:18,844 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:58:18,844 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:58:18,848 INFO  L85        PathProgramCache]: Analyzing trace with hash -1451468924, now seen corresponding path program 1 times
[2023-11-28 23:58:18,848 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:58:18,848 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349188884]
[2023-11-28 23:58:18,849 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:58:18,849 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:58:19,970 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:58:19,970 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735532017]
[2023-11-28 23:58:19,972 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:58:19,972 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:58:19,973 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:58:19,973 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:58:19,976 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-28 23:58:31,606 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:58:31,871 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44669 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-28 23:58:31,995 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:58:32,213 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 904 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 23:58:32,213 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:58:32,214 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:58:32,214 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349188884]
[2023-11-28 23:58:32,214 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:58:32,214 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735532017]
[2023-11-28 23:58:32,214 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [735532017] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:58:32,214 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:58:32,217 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 23:58:32,217 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636737285]
[2023-11-28 23:58:32,217 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:58:32,225 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 23:58:32,225 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:58:32,232 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 23:58:32,232 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 23:58:32,235 INFO  L87              Difference]: Start difference. First operand 13405 states and 22335 transitions. Second operand  has 4 states, 4 states have (on average 2231.75) internal successors, (8927), 4 states have internal predecessors, (8927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:58:32,708 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:58:32,708 INFO  L93              Difference]: Finished difference Result 24947 states and 41566 transitions.
[2023-11-28 23:58:32,709 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 23:58:32,711 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2231.75) internal successors, (8927), 4 states have internal predecessors, (8927), 0 states have call successors, (0), 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 8927
[2023-11-28 23:58:32,725 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:58:32,738 INFO  L225             Difference]: With dead ends: 24947
[2023-11-28 23:58:32,739 INFO  L226             Difference]: Without dead ends: 13414
[2023-11-28 23:58:32,752 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8926 GetRequests, 8924 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 23:58:32,753 INFO  L413           NwaCegarLoop]: 20079 mSDtfsCounter, 12 mSDsluCounter, 40148 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 60227 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:58:32,753 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 60227 Invalid, 17 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:58:32,771 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13414 states.
[2023-11-28 23:58:32,936 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13414 to 13406.
[2023-11-28 23:58:32,950 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13406 states, 13405 states have (on average 1.6662439388287953) internal successors, (22336), 13405 states have internal predecessors, (22336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:58:32,971 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13406 states to 13406 states and 22336 transitions.
[2023-11-28 23:58:32,972 INFO  L78                 Accepts]: Start accepts. Automaton has 13406 states and 22336 transitions. Word has length 8927
[2023-11-28 23:58:32,978 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:58:32,978 INFO  L495      AbstractCegarLoop]: Abstraction has 13406 states and 22336 transitions.
[2023-11-28 23:58:32,980 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2231.75) internal successors, (8927), 4 states have internal predecessors, (8927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:58:32,980 INFO  L276                IsEmpty]: Start isEmpty. Operand 13406 states and 22336 transitions.
[2023-11-28 23:58:33,377 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8928
[2023-11-28 23:58:33,377 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:58:33,382 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:58:33,483 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2023-11-28 23:58:33,582 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:58:33,583 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:58:33,583 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:58:33,586 INFO  L85        PathProgramCache]: Analyzing trace with hash 1255258578, now seen corresponding path program 1 times
[2023-11-28 23:58:33,587 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:58:33,587 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968678518]
[2023-11-28 23:58:33,588 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:58:33,589 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:58:34,544 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:58:34,544 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [162087245]
[2023-11-28 23:58:34,546 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:58:34,546 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:58:34,546 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:58:34,547 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:58:34,552 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-28 23:58:46,134 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:58:46,412 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44670 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-28 23:58:46,612 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:58:48,059 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 6 proven. 671 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked.
[2023-11-28 23:58:48,059 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 23:58:48,326 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked.
[2023-11-28 23:58:48,326 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:58:48,327 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968678518]
[2023-11-28 23:58:48,327 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:58:48,327 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162087245]
[2023-11-28 23:58:48,327 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [162087245] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 23:58:48,327 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 23:58:48,332 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12
[2023-11-28 23:58:48,332 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325426150]
[2023-11-28 23:58:48,332 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:58:48,340 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-28 23:58:48,340 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:58:48,346 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-28 23:58:48,346 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132
[2023-11-28 23:58:48,348 INFO  L87              Difference]: Start difference. First operand 13406 states and 22336 transitions. Second operand  has 6 states, 6 states have (on average 1338.3333333333333) internal successors, (8030), 6 states have internal predecessors, (8030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:59:15,866 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:59:15,866 INFO  L93              Difference]: Finished difference Result 58325 states and 96780 transitions.
[2023-11-28 23:59:15,866 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-11-28 23:59:15,868 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 1338.3333333333333) internal successors, (8030), 6 states have internal predecessors, (8030), 0 states have call successors, (0), 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 8927
[2023-11-28 23:59:15,875 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:59:15,895 INFO  L225             Difference]: With dead ends: 58325
[2023-11-28 23:59:15,895 INFO  L226             Difference]: Without dead ends: 36467
[2023-11-28 23:59:15,904 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17854 GetRequests, 17842 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:59:15,905 INFO  L413           NwaCegarLoop]: 31887 mSDtfsCounter, 85173 mSDsluCounter, 77032 mSDsCounter, 0 mSdLazyCounter, 35768 mSolverCounterSat, 1208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85173 SdHoareTripleChecker+Valid, 108919 SdHoareTripleChecker+Invalid, 36976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.5s SdHoareTripleChecker+Time, 1208 IncrementalHoareTripleChecker+Valid, 35768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:59:15,905 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [85173 Valid, 108919 Invalid, 36976 Unknown, 0 Unchecked, 0.5s Time], IncrementalHoareTripleChecker [1208 Valid, 35768 Invalid, 0 Unknown, 0 Unchecked, 26.1s Time]
[2023-11-28 23:59:15,932 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 36467 states.
[2023-11-28 23:59:16,115 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 36467 to 13406.
[2023-11-28 23:59:16,128 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13406 states, 13405 states have (on average 1.6662439388287953) internal successors, (22336), 13405 states have internal predecessors, (22336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:59:16,143 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13406 states to 13406 states and 22336 transitions.
[2023-11-28 23:59:16,143 INFO  L78                 Accepts]: Start accepts. Automaton has 13406 states and 22336 transitions. Word has length 8927
[2023-11-28 23:59:16,149 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:59:16,149 INFO  L495      AbstractCegarLoop]: Abstraction has 13406 states and 22336 transitions.
[2023-11-28 23:59:16,150 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 1338.3333333333333) internal successors, (8030), 6 states have internal predecessors, (8030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:59:16,151 INFO  L276                IsEmpty]: Start isEmpty. Operand 13406 states and 22336 transitions.
[2023-11-28 23:59:16,503 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8929
[2023-11-28 23:59:16,504 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:59:16,508 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:59:16,616 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2023-11-28 23:59:16,708 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:59:16,709 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:59:16,709 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:59:16,712 INFO  L85        PathProgramCache]: Analyzing trace with hash 1858224526, now seen corresponding path program 1 times
[2023-11-28 23:59:16,712 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:59:16,712 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176719172]
[2023-11-28 23:59:16,713 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:59:16,713 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:59:17,676 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:59:17,676 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89973505]
[2023-11-28 23:59:17,678 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:59:17,679 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:59:17,679 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:59:17,680 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:59:17,681 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-28 23:59:29,668 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:59:29,954 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44673 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 23:59:30,147 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:59:31,486 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 8 proven. 671 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked.
[2023-11-28 23:59:31,486 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 23:59:31,737 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 896 trivial. 0 not checked.
[2023-11-28 23:59:31,738 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:59:31,738 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176719172]
[2023-11-28 23:59:31,738 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:59:31,738 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89973505]
[2023-11-28 23:59:31,738 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [89973505] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 23:59:31,738 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 23:59:31,743 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 23:59:31,744 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124622295]
[2023-11-28 23:59:31,744 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:59:31,753 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 23:59:31,753 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:59:31,762 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 23:59:31,762 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 23:59:31,764 INFO  L87              Difference]: Start difference. First operand 13406 states and 22336 transitions. Second operand  has 5 states, 5 states have (on average 1606.6) internal successors, (8033), 5 states have internal predecessors, (8033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:59:47,673 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:59:47,673 INFO  L93              Difference]: Finished difference Result 46798 states and 77571 transitions.
[2023-11-28 23:59:47,673 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 23:59:47,675 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1606.6) internal successors, (8033), 5 states have internal predecessors, (8033), 0 states have call successors, (0), 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 8928
[2023-11-28 23:59:47,686 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:59:47,711 INFO  L225             Difference]: With dead ends: 46798
[2023-11-28 23:59:47,711 INFO  L226             Difference]: Without dead ends: 24935
[2023-11-28 23:59:47,726 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17855 GetRequests, 17846 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 23:59:47,727 INFO  L413           NwaCegarLoop]: 31877 mSDtfsCounter, 50368 mSDsluCounter, 31643 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50368 SdHoareTripleChecker+Valid, 63520 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time
[2023-11-28 23:59:47,727 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50368 Valid, 63520 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 14.9s Time]
[2023-11-28 23:59:47,754 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24935 states.
[2023-11-28 23:59:47,970 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24935 to 13408.
[2023-11-28 23:59:47,982 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13408 states, 13407 states have (on average 1.6661445513537705) internal successors, (22338), 13407 states have internal predecessors, (22338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:59:48,003 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13408 states to 13408 states and 22338 transitions.
[2023-11-28 23:59:48,003 INFO  L78                 Accepts]: Start accepts. Automaton has 13408 states and 22338 transitions. Word has length 8928
[2023-11-28 23:59:48,010 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:59:48,010 INFO  L495      AbstractCegarLoop]: Abstraction has 13408 states and 22338 transitions.
[2023-11-28 23:59:48,012 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1606.6) internal successors, (8033), 5 states have internal predecessors, (8033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:59:48,012 INFO  L276                IsEmpty]: Start isEmpty. Operand 13408 states and 22338 transitions.
[2023-11-28 23:59:48,709 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8930
[2023-11-28 23:59:48,709 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:59:48,714 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:59:48,825 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0
[2023-11-28 23:59:48,914 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:59:48,915 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:59:48,915 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:59:48,918 INFO  L85        PathProgramCache]: Analyzing trace with hash -1599570194, now seen corresponding path program 1 times
[2023-11-28 23:59:48,918 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:59:48,918 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590442236]
[2023-11-28 23:59:48,918 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:59:48,919 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:59:50,176 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:59:50,176 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402801195]
[2023-11-28 23:59:50,178 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:59:50,178 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:59:50,178 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:59:50,179 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:59:50,180 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-29 00:00:01,727 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:00:02,031 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44677 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:00:02,244 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:00:03,592 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 10 proven. 671 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked.
[2023-11-29 00:00:03,593 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:00:03,751 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 894 trivial. 0 not checked.
[2023-11-29 00:00:03,751 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:00:03,751 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590442236]
[2023-11-29 00:00:03,751 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:00:03,751 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402801195]
[2023-11-29 00:00:03,751 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [402801195] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:00:03,752 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:00:03,758 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:00:03,758 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075643335]
[2023-11-29 00:00:03,758 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:00:03,766 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:00:03,766 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:00:03,771 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:00:03,771 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:00:03,774 INFO  L87              Difference]: Start difference. First operand 13408 states and 22338 transitions. Second operand  has 5 states, 5 states have (on average 1607.2) internal successors, (8036), 5 states have internal predecessors, (8036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:00:18,687 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:00:18,687 INFO  L93              Difference]: Finished difference Result 46806 states and 77579 transitions.
[2023-11-29 00:00:18,687 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:00:18,689 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1607.2) internal successors, (8036), 5 states have internal predecessors, (8036), 0 states have call successors, (0), 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 8929
[2023-11-29 00:00:18,694 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:00:18,710 INFO  L225             Difference]: With dead ends: 46806
[2023-11-29 00:00:18,710 INFO  L226             Difference]: Without dead ends: 24936
[2023-11-29 00:00:18,720 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17857 GetRequests, 17848 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 00:00:18,721 INFO  L413           NwaCegarLoop]: 31869 mSDtfsCounter, 50359 mSDsluCounter, 31638 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50359 SdHoareTripleChecker+Valid, 63507 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time
[2023-11-29 00:00:18,721 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50359 Valid, 63507 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 14.2s Time]
[2023-11-29 00:00:18,748 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24936 states.
[2023-11-29 00:00:18,911 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24936 to 13410.
[2023-11-29 00:00:18,922 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13410 states, 13409 states have (on average 1.6660451935267357) internal successors, (22340), 13409 states have internal predecessors, (22340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:00:18,936 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13410 states to 13410 states and 22340 transitions.
[2023-11-29 00:00:18,936 INFO  L78                 Accepts]: Start accepts. Automaton has 13410 states and 22340 transitions. Word has length 8929
[2023-11-29 00:00:18,941 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:00:18,941 INFO  L495      AbstractCegarLoop]: Abstraction has 13410 states and 22340 transitions.
[2023-11-29 00:00:18,942 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1607.2) internal successors, (8036), 5 states have internal predecessors, (8036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:00:18,943 INFO  L276                IsEmpty]: Start isEmpty. Operand 13410 states and 22340 transitions.
[2023-11-29 00:00:19,419 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8931
[2023-11-29 00:00:19,419 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:00:19,423 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 00:00:19,542 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0
[2023-11-29 00:00:19,623 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:00:19,624 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:00:19,624 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:00:19,627 INFO  L85        PathProgramCache]: Analyzing trace with hash -667116682, now seen corresponding path program 1 times
[2023-11-29 00:00:19,627 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:00:19,627 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512328079]
[2023-11-29 00:00:19,628 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:00:19,628 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:00:20,424 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:00:20,424 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1289316167]
[2023-11-29 00:00:20,426 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:00:20,426 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:00:20,426 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:00:20,427 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:00:20,428 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-29 00:00:32,170 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:00:32,464 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44680 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:00:32,580 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:00:33,864 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 12 proven. 671 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked.
[2023-11-29 00:00:33,864 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:00:34,051 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 892 trivial. 0 not checked.
[2023-11-29 00:00:34,051 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:00:34,052 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512328079]
[2023-11-29 00:00:34,052 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:00:34,052 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289316167]
[2023-11-29 00:00:34,052 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289316167] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:00:34,052 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:00:34,058 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:00:34,058 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262221490]
[2023-11-29 00:00:34,058 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:00:34,066 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:00:34,066 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:00:34,072 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:00:34,073 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:00:34,075 INFO  L87              Difference]: Start difference. First operand 13410 states and 22340 transitions. Second operand  has 5 states, 5 states have (on average 1607.8) internal successors, (8039), 5 states have internal predecessors, (8039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:00:49,029 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:00:49,030 INFO  L93              Difference]: Finished difference Result 46814 states and 77587 transitions.
[2023-11-29 00:00:49,030 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:00:49,031 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1607.8) internal successors, (8039), 5 states have internal predecessors, (8039), 0 states have call successors, (0), 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 8930
[2023-11-29 00:00:49,037 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:00:49,057 INFO  L225             Difference]: With dead ends: 46814
[2023-11-29 00:00:49,057 INFO  L226             Difference]: Without dead ends: 24937
[2023-11-29 00:00:49,068 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17859 GetRequests, 17850 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 00:00:49,069 INFO  L413           NwaCegarLoop]: 31861 mSDtfsCounter, 50354 mSDsluCounter, 31632 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50354 SdHoareTripleChecker+Valid, 63493 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time
[2023-11-29 00:00:49,069 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50354 Valid, 63493 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 14.2s Time]
[2023-11-29 00:00:49,095 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24937 states.
[2023-11-29 00:00:49,223 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24937 to 13412.
[2023-11-29 00:00:49,234 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13412 states, 13411 states have (on average 1.665945865334427) internal successors, (22342), 13411 states have internal predecessors, (22342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:00:49,248 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13412 states to 13412 states and 22342 transitions.
[2023-11-29 00:00:49,248 INFO  L78                 Accepts]: Start accepts. Automaton has 13412 states and 22342 transitions. Word has length 8930
[2023-11-29 00:00:49,252 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:00:49,253 INFO  L495      AbstractCegarLoop]: Abstraction has 13412 states and 22342 transitions.
[2023-11-29 00:00:49,254 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1607.8) internal successors, (8039), 5 states have internal predecessors, (8039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:00:49,254 INFO  L276                IsEmpty]: Start isEmpty. Operand 13412 states and 22342 transitions.
[2023-11-29 00:00:49,616 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8932
[2023-11-29 00:00:49,616 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:00:49,620 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 00:00:49,734 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0
[2023-11-29 00:00:49,820 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:00:49,821 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:00:49,821 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:00:49,824 INFO  L85        PathProgramCache]: Analyzing trace with hash -1046776568, now seen corresponding path program 1 times
[2023-11-29 00:00:49,824 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:00:49,824 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267276414]
[2023-11-29 00:00:49,825 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:00:49,825 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:00:50,602 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:00:50,603 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293281298]
[2023-11-29 00:00:50,604 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:00:50,604 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:00:50,604 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:00:50,605 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:00:50,606 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-29 00:01:02,570 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:01:02,853 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44683 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:01:03,193 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:01:04,237 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 14 proven. 671 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked.
[2023-11-29 00:01:04,237 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:01:04,413 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 890 trivial. 0 not checked.
[2023-11-29 00:01:04,413 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:01:04,413 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267276414]
[2023-11-29 00:01:04,413 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:01:04,413 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293281298]
[2023-11-29 00:01:04,413 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [293281298] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:01:04,413 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:01:04,418 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:01:04,418 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172733876]
[2023-11-29 00:01:04,418 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:01:04,424 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:01:04,424 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:01:04,430 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:01:04,430 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:01:04,432 INFO  L87              Difference]: Start difference. First operand 13412 states and 22342 transitions. Second operand  has 5 states, 5 states have (on average 1608.4) internal successors, (8042), 5 states have internal predecessors, (8042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:01:19,129 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:01:19,129 INFO  L93              Difference]: Finished difference Result 46822 states and 77595 transitions.
[2023-11-29 00:01:19,129 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:01:19,131 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1608.4) internal successors, (8042), 5 states have internal predecessors, (8042), 0 states have call successors, (0), 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 8931
[2023-11-29 00:01:19,136 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:01:19,157 INFO  L225             Difference]: With dead ends: 46822
[2023-11-29 00:01:19,157 INFO  L226             Difference]: Without dead ends: 24938
[2023-11-29 00:01:19,166 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17861 GetRequests, 17852 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 00:01:19,166 INFO  L413           NwaCegarLoop]: 31853 mSDtfsCounter, 50346 mSDsluCounter, 31627 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50346 SdHoareTripleChecker+Valid, 63480 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time
[2023-11-29 00:01:19,167 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50346 Valid, 63480 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 14.0s Time]
[2023-11-29 00:01:19,188 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24938 states.
[2023-11-29 00:01:19,317 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24938 to 13414.
[2023-11-29 00:01:19,328 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13414 states, 13413 states have (on average 1.6658465667635876) internal successors, (22344), 13413 states have internal predecessors, (22344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:01:19,343 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13414 states to 13414 states and 22344 transitions.
[2023-11-29 00:01:19,343 INFO  L78                 Accepts]: Start accepts. Automaton has 13414 states and 22344 transitions. Word has length 8931
[2023-11-29 00:01:19,348 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:01:19,349 INFO  L495      AbstractCegarLoop]: Abstraction has 13414 states and 22344 transitions.
[2023-11-29 00:01:19,350 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1608.4) internal successors, (8042), 5 states have internal predecessors, (8042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:01:19,350 INFO  L276                IsEmpty]: Start isEmpty. Operand 13414 states and 22344 transitions.
[2023-11-29 00:01:19,735 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8933
[2023-11-29 00:01:19,735 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:01:19,737 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 00:01:19,856 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0
[2023-11-29 00:01:19,937 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2023-11-29 00:01:19,938 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:01:19,939 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:01:19,942 INFO  L85        PathProgramCache]: Analyzing trace with hash -1187112356, now seen corresponding path program 1 times
[2023-11-29 00:01:19,942 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:01:19,942 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554932260]
[2023-11-29 00:01:19,943 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:01:19,943 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:01:20,743 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:01:20,743 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202645456]
[2023-11-29 00:01:20,745 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:01:20,745 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:01:20,745 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:01:20,746 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:01:20,746 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-11-29 00:01:32,418 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:01:32,703 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44686 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:01:32,802 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:01:34,053 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 16 proven. 671 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked.
[2023-11-29 00:01:34,053 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:01:34,228 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 888 trivial. 0 not checked.
[2023-11-29 00:01:34,229 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:01:34,229 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554932260]
[2023-11-29 00:01:34,229 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:01:34,229 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202645456]
[2023-11-29 00:01:34,229 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [202645456] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:01:34,229 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:01:34,233 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:01:34,234 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994593779]
[2023-11-29 00:01:34,234 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:01:34,240 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:01:34,240 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:01:34,246 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:01:34,246 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:01:34,248 INFO  L87              Difference]: Start difference. First operand 13414 states and 22344 transitions. Second operand  has 5 states, 5 states have (on average 1609.0) internal successors, (8045), 5 states have internal predecessors, (8045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:01:51,083 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:01:51,083 INFO  L93              Difference]: Finished difference Result 46830 states and 77603 transitions.
[2023-11-29 00:01:51,084 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:01:51,085 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1609.0) internal successors, (8045), 5 states have internal predecessors, (8045), 0 states have call successors, (0), 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 8932
[2023-11-29 00:01:51,091 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:01:51,144 INFO  L225             Difference]: With dead ends: 46830
[2023-11-29 00:01:51,145 INFO  L226             Difference]: Without dead ends: 24939
[2023-11-29 00:01:51,152 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17863 GetRequests, 17854 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 00:01:51,153 INFO  L413           NwaCegarLoop]: 31845 mSDtfsCounter, 34760 mSDsluCounter, 48224 mSDsCounter, 0 mSdLazyCounter, 22495 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34760 SdHoareTripleChecker+Valid, 80069 SdHoareTripleChecker+Invalid, 23700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 22495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time
[2023-11-29 00:01:51,153 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34760 Valid, 80069 Invalid, 23700 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 22495 Invalid, 0 Unknown, 0 Unchecked, 15.9s Time]
[2023-11-29 00:01:51,174 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24939 states.
[2023-11-29 00:01:51,301 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24939 to 13416.
[2023-11-29 00:01:51,313 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13416 states, 13415 states have (on average 1.665747297800969) internal successors, (22346), 13415 states have internal predecessors, (22346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:01:51,328 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13416 states to 13416 states and 22346 transitions.
[2023-11-29 00:01:51,328 INFO  L78                 Accepts]: Start accepts. Automaton has 13416 states and 22346 transitions. Word has length 8932
[2023-11-29 00:01:51,333 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:01:51,333 INFO  L495      AbstractCegarLoop]: Abstraction has 13416 states and 22346 transitions.
[2023-11-29 00:01:51,334 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1609.0) internal successors, (8045), 5 states have internal predecessors, (8045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:01:51,334 INFO  L276                IsEmpty]: Start isEmpty. Operand 13416 states and 22346 transitions.
[2023-11-29 00:01:51,708 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8934
[2023-11-29 00:01:51,708 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:01:51,710 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 00:01:51,832 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0
[2023-11-29 00:01:51,911 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:01:51,911 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:01:51,912 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:01:51,913 INFO  L85        PathProgramCache]: Analyzing trace with hash 1380082468, now seen corresponding path program 1 times
[2023-11-29 00:01:51,913 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:01:51,914 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337339712]
[2023-11-29 00:01:51,914 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:01:51,914 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:01:52,706 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:01:52,706 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648389135]
[2023-11-29 00:01:52,707 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:01:52,708 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:01:52,708 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:01:52,708 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:01:52,709 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-11-29 00:02:04,534 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:02:04,821 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44690 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:02:04,918 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:02:05,934 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 18 proven. 671 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked.
[2023-11-29 00:02:05,934 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:02:06,335 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked.
[2023-11-29 00:02:06,336 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:02:06,336 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337339712]
[2023-11-29 00:02:06,336 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:02:06,336 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648389135]
[2023-11-29 00:02:06,336 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648389135] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:02:06,336 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:02:06,340 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:02:06,341 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993189788]
[2023-11-29 00:02:06,341 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:02:06,345 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:02:06,345 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:02:06,349 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:02:06,349 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:02:06,351 INFO  L87              Difference]: Start difference. First operand 13416 states and 22346 transitions. Second operand  has 5 states, 5 states have (on average 1609.6) internal successors, (8048), 5 states have internal predecessors, (8048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:02:23,029 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:02:23,029 INFO  L93              Difference]: Finished difference Result 46838 states and 77611 transitions.
[2023-11-29 00:02:23,029 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:02:23,031 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1609.6) internal successors, (8048), 5 states have internal predecessors, (8048), 0 states have call successors, (0), 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 8933
[2023-11-29 00:02:23,036 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:02:23,054 INFO  L225             Difference]: With dead ends: 46838
[2023-11-29 00:02:23,054 INFO  L226             Difference]: Without dead ends: 24940
[2023-11-29 00:02:23,061 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17865 GetRequests, 17856 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 00:02:23,062 INFO  L413           NwaCegarLoop]: 31837 mSDtfsCounter, 34754 mSDsluCounter, 48214 mSDsCounter, 0 mSdLazyCounter, 22495 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34754 SdHoareTripleChecker+Valid, 80051 SdHoareTripleChecker+Invalid, 23700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 22495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time
[2023-11-29 00:02:23,062 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34754 Valid, 80051 Invalid, 23700 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 22495 Invalid, 0 Unknown, 0 Unchecked, 15.8s Time]
[2023-11-29 00:02:23,081 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24940 states.
[2023-11-29 00:02:23,201 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24940 to 13418.
[2023-11-29 00:02:23,212 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13418 states, 13417 states have (on average 1.6656480584333309) internal successors, (22348), 13417 states have internal predecessors, (22348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:02:23,226 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13418 states to 13418 states and 22348 transitions.
[2023-11-29 00:02:23,226 INFO  L78                 Accepts]: Start accepts. Automaton has 13418 states and 22348 transitions. Word has length 8933
[2023-11-29 00:02:23,231 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:02:23,231 INFO  L495      AbstractCegarLoop]: Abstraction has 13418 states and 22348 transitions.
[2023-11-29 00:02:23,232 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1609.6) internal successors, (8048), 5 states have internal predecessors, (8048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:02:23,233 INFO  L276                IsEmpty]: Start isEmpty. Operand 13418 states and 22348 transitions.
[2023-11-29 00:02:23,577 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8935
[2023-11-29 00:02:23,577 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:02:23,579 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 00:02:23,694 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0
[2023-11-29 00:02:23,779 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11
[2023-11-29 00:02:23,780 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:02:23,780 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:02:23,782 INFO  L85        PathProgramCache]: Analyzing trace with hash 1033651524, now seen corresponding path program 1 times
[2023-11-29 00:02:23,782 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:02:23,782 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807890531]
[2023-11-29 00:02:23,783 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:02:23,783 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:02:24,693 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:02:24,693 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [854994938]
[2023-11-29 00:02:24,694 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:02:24,694 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:02:24,694 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:02:24,695 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:02:24,696 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2023-11-29 00:02:36,202 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:02:36,477 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44693 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:02:36,572 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:02:37,585 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 20 proven. 671 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked.
[2023-11-29 00:02:37,585 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:02:37,748 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 884 trivial. 0 not checked.
[2023-11-29 00:02:37,748 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:02:37,748 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807890531]
[2023-11-29 00:02:37,748 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:02:37,748 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854994938]
[2023-11-29 00:02:37,748 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [854994938] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:02:37,748 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:02:37,753 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:02:37,753 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239760729]
[2023-11-29 00:02:37,753 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:02:37,757 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:02:37,757 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:02:37,761 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:02:37,761 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:02:37,763 INFO  L87              Difference]: Start difference. First operand 13418 states and 22348 transitions. Second operand  has 5 states, 5 states have (on average 1610.2) internal successors, (8051), 5 states have internal predecessors, (8051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:02:54,495 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:02:54,495 INFO  L93              Difference]: Finished difference Result 46846 states and 77619 transitions.
[2023-11-29 00:02:54,496 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:02:54,497 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1610.2) internal successors, (8051), 5 states have internal predecessors, (8051), 0 states have call successors, (0), 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 8934
[2023-11-29 00:02:54,502 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:02:54,517 INFO  L225             Difference]: With dead ends: 46846
[2023-11-29 00:02:54,517 INFO  L226             Difference]: Without dead ends: 24941
[2023-11-29 00:02:54,522 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17867 GetRequests, 17858 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 00:02:54,522 INFO  L413           NwaCegarLoop]: 31829 mSDtfsCounter, 34748 mSDsluCounter, 48204 mSDsCounter, 0 mSdLazyCounter, 22495 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34748 SdHoareTripleChecker+Valid, 80033 SdHoareTripleChecker+Invalid, 23700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 22495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time
[2023-11-29 00:02:54,522 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34748 Valid, 80033 Invalid, 23700 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 22495 Invalid, 0 Unknown, 0 Unchecked, 15.9s Time]
[2023-11-29 00:02:54,540 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24941 states.
[2023-11-29 00:02:54,650 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24941 to 13420.
[2023-11-29 00:02:54,661 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13420 states, 13419 states have (on average 1.6655488486474401) internal successors, (22350), 13419 states have internal predecessors, (22350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:02:54,676 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13420 states to 13420 states and 22350 transitions.
[2023-11-29 00:02:54,676 INFO  L78                 Accepts]: Start accepts. Automaton has 13420 states and 22350 transitions. Word has length 8934
[2023-11-29 00:02:54,681 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:02:54,681 INFO  L495      AbstractCegarLoop]: Abstraction has 13420 states and 22350 transitions.
[2023-11-29 00:02:54,682 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1610.2) internal successors, (8051), 5 states have internal predecessors, (8051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:02:54,682 INFO  L276                IsEmpty]: Start isEmpty. Operand 13420 states and 22350 transitions.
[2023-11-29 00:02:54,975 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8936
[2023-11-29 00:02:54,975 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:02:54,977 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 00:02:55,099 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0
[2023-11-29 00:02:55,177 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12
[2023-11-29 00:02:55,178 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:02:55,178 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:02:55,181 INFO  L85        PathProgramCache]: Analyzing trace with hash -1471335106, now seen corresponding path program 1 times
[2023-11-29 00:02:55,181 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:02:55,181 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73815219]
[2023-11-29 00:02:55,182 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:02:55,182 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:02:55,986 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:02:55,987 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639171904]
[2023-11-29 00:02:55,988 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:02:55,988 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:02:55,988 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:02:55,989 INFO  L229       MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:02:55,990 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2023-11-29 00:03:07,252 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:03:07,534 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44696 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:03:07,840 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:03:08,915 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 22 proven. 671 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked.
[2023-11-29 00:03:08,915 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:03:09,081 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked.
[2023-11-29 00:03:09,082 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:03:09,082 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73815219]
[2023-11-29 00:03:09,082 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:03:09,082 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639171904]
[2023-11-29 00:03:09,082 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639171904] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:03:09,082 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:03:09,087 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:03:09,087 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891732678]
[2023-11-29 00:03:09,087 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:03:09,091 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:03:09,091 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:03:09,095 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:03:09,095 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:03:09,097 INFO  L87              Difference]: Start difference. First operand 13420 states and 22350 transitions. Second operand  has 5 states, 5 states have (on average 1610.8) internal successors, (8054), 5 states have internal predecessors, (8054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:03:24,301 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:03:24,301 INFO  L93              Difference]: Finished difference Result 46854 states and 77627 transitions.
[2023-11-29 00:03:24,302 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:03:24,303 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1610.8) internal successors, (8054), 5 states have internal predecessors, (8054), 0 states have call successors, (0), 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 8935
[2023-11-29 00:03:24,310 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:03:24,327 INFO  L225             Difference]: With dead ends: 46854
[2023-11-29 00:03:24,327 INFO  L226             Difference]: Without dead ends: 24942
[2023-11-29 00:03:24,335 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17869 GetRequests, 17860 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 00:03:24,336 INFO  L413           NwaCegarLoop]: 31821 mSDtfsCounter, 50314 mSDsluCounter, 31607 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50314 SdHoareTripleChecker+Valid, 63428 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time
[2023-11-29 00:03:24,336 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50314 Valid, 63428 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 14.2s Time]
[2023-11-29 00:03:24,357 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24942 states.
[2023-11-29 00:03:24,485 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24942 to 13422.
[2023-11-29 00:03:24,496 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13422 states, 13421 states have (on average 1.6654496684300724) internal successors, (22352), 13421 states have internal predecessors, (22352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:03:24,511 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13422 states to 13422 states and 22352 transitions.
[2023-11-29 00:03:24,511 INFO  L78                 Accepts]: Start accepts. Automaton has 13422 states and 22352 transitions. Word has length 8935
[2023-11-29 00:03:24,516 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:03:24,516 INFO  L495      AbstractCegarLoop]: Abstraction has 13422 states and 22352 transitions.
[2023-11-29 00:03:24,517 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1610.8) internal successors, (8054), 5 states have internal predecessors, (8054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:03:24,517 INFO  L276                IsEmpty]: Start isEmpty. Operand 13422 states and 22352 transitions.
[2023-11-29 00:03:24,840 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8937
[2023-11-29 00:03:24,840 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:03:24,842 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 00:03:24,969 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0
[2023-11-29 00:03:25,042 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13
[2023-11-29 00:03:25,043 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:03:25,044 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:03:25,046 INFO  L85        PathProgramCache]: Analyzing trace with hash 1321519146, now seen corresponding path program 1 times
[2023-11-29 00:03:25,046 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:03:25,046 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308500907]
[2023-11-29 00:03:25,048 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:03:25,048 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:03:25,908 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:03:25,909 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377872050]
[2023-11-29 00:03:25,911 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:03:25,911 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:03:25,911 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:03:25,912 INFO  L229       MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:03:25,913 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2023-11-29 00:03:38,439 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:03:38,700 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44699 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:03:38,794 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:03:39,832 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 24 proven. 671 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked.
[2023-11-29 00:03:39,832 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:03:39,995 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked.
[2023-11-29 00:03:39,995 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:03:39,995 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308500907]
[2023-11-29 00:03:39,995 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:03:39,995 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377872050]
[2023-11-29 00:03:39,995 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [377872050] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:03:39,996 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:03:40,002 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:03:40,002 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302257930]
[2023-11-29 00:03:40,002 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:03:40,006 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:03:40,007 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:03:40,011 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:03:40,011 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:03:40,013 INFO  L87              Difference]: Start difference. First operand 13422 states and 22352 transitions. Second operand  has 5 states, 5 states have (on average 1611.4) internal successors, (8057), 5 states have internal predecessors, (8057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:03:55,220 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:03:55,220 INFO  L93              Difference]: Finished difference Result 46862 states and 77635 transitions.
[2023-11-29 00:03:55,220 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:03:55,222 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1611.4) internal successors, (8057), 5 states have internal predecessors, (8057), 0 states have call successors, (0), 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 8936
[2023-11-29 00:03:55,227 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:03:55,245 INFO  L225             Difference]: With dead ends: 46862
[2023-11-29 00:03:55,245 INFO  L226             Difference]: Without dead ends: 24943
[2023-11-29 00:03:55,254 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17871 GetRequests, 17862 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 00:03:55,255 INFO  L413           NwaCegarLoop]: 31813 mSDtfsCounter, 50306 mSDsluCounter, 31602 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50306 SdHoareTripleChecker+Valid, 63415 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time
[2023-11-29 00:03:55,255 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50306 Valid, 63415 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 14.3s Time]
[2023-11-29 00:03:55,277 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24943 states.
[2023-11-29 00:03:55,405 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24943 to 13424.
[2023-11-29 00:03:55,416 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13424 states, 13423 states have (on average 1.6653505177680101) internal successors, (22354), 13423 states have internal predecessors, (22354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:03:55,432 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13424 states to 13424 states and 22354 transitions.
[2023-11-29 00:03:55,432 INFO  L78                 Accepts]: Start accepts. Automaton has 13424 states and 22354 transitions. Word has length 8936
[2023-11-29 00:03:55,436 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:03:55,436 INFO  L495      AbstractCegarLoop]: Abstraction has 13424 states and 22354 transitions.
[2023-11-29 00:03:55,438 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1611.4) internal successors, (8057), 5 states have internal predecessors, (8057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:03:55,438 INFO  L276                IsEmpty]: Start isEmpty. Operand 13424 states and 22354 transitions.
[2023-11-29 00:03:55,760 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8938
[2023-11-29 00:03:55,760 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:03:55,762 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 00:03:55,888 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0
[2023-11-29 00:03:55,962 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2023-11-29 00:03:55,963 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:03:55,964 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:03:55,965 INFO  L85        PathProgramCache]: Analyzing trace with hash -887272358, now seen corresponding path program 1 times
[2023-11-29 00:03:55,965 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:03:55,965 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406968115]
[2023-11-29 00:03:55,968 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:03:55,968 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:03:56,809 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:03:56,809 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925649617]
[2023-11-29 00:03:56,810 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:03:56,811 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:03:56,811 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:03:56,812 INFO  L229       MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:03:56,812 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2023-11-29 00:04:09,125 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:04:09,493 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44703 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:04:09,660 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:04:11,066 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 26 proven. 671 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked.
[2023-11-29 00:04:11,066 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:04:11,260 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 878 trivial. 0 not checked.
[2023-11-29 00:04:11,260 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:04:11,260 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406968115]
[2023-11-29 00:04:11,260 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:04:11,260 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925649617]
[2023-11-29 00:04:11,260 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [925649617] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:04:11,260 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:04:11,266 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:04:11,266 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540392576]
[2023-11-29 00:04:11,266 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:04:11,274 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:04:11,274 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:04:11,282 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:04:11,282 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:04:11,285 INFO  L87              Difference]: Start difference. First operand 13424 states and 22354 transitions. Second operand  has 5 states, 5 states have (on average 1612.0) internal successors, (8060), 5 states have internal predecessors, (8060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:04:27,897 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:04:27,897 INFO  L93              Difference]: Finished difference Result 46870 states and 77643 transitions.
[2023-11-29 00:04:27,897 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:04:27,898 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1612.0) internal successors, (8060), 5 states have internal predecessors, (8060), 0 states have call successors, (0), 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 8937
[2023-11-29 00:04:27,904 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:04:27,919 INFO  L225             Difference]: With dead ends: 46870
[2023-11-29 00:04:27,919 INFO  L226             Difference]: Without dead ends: 24944
[2023-11-29 00:04:27,927 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17873 GetRequests, 17864 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 00:04:27,927 INFO  L413           NwaCegarLoop]: 31805 mSDtfsCounter, 50287 mSDsluCounter, 31598 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50287 SdHoareTripleChecker+Valid, 63403 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time
[2023-11-29 00:04:27,927 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50287 Valid, 63403 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 15.7s Time]
[2023-11-29 00:04:27,947 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24944 states.
[2023-11-29 00:04:28,062 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24944 to 13426.
[2023-11-29 00:04:28,072 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13426 states, 13425 states have (on average 1.6652513966480447) internal successors, (22356), 13425 states have internal predecessors, (22356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:04:28,086 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13426 states to 13426 states and 22356 transitions.
[2023-11-29 00:04:28,086 INFO  L78                 Accepts]: Start accepts. Automaton has 13426 states and 22356 transitions. Word has length 8937
[2023-11-29 00:04:28,091 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:04:28,091 INFO  L495      AbstractCegarLoop]: Abstraction has 13426 states and 22356 transitions.
[2023-11-29 00:04:28,092 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1612.0) internal successors, (8060), 5 states have internal predecessors, (8060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:04:28,092 INFO  L276                IsEmpty]: Start isEmpty. Operand 13426 states and 22356 transitions.
[2023-11-29 00:04:28,384 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8939
[2023-11-29 00:04:28,384 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:04:28,386 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 00:04:28,513 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0
[2023-11-29 00:04:28,587 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2023-11-29 00:04:28,587 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:04:28,587 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:04:28,588 INFO  L85        PathProgramCache]: Analyzing trace with hash 5686290, now seen corresponding path program 1 times
[2023-11-29 00:04:28,589 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:04:28,589 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588583795]
[2023-11-29 00:04:28,589 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:04:28,590 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:04:29,483 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:04:29,483 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044537509]
[2023-11-29 00:04:29,485 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:04:29,485 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:04:29,485 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:04:29,486 INFO  L229       MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:04:29,487 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2023-11-29 00:04:43,233 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:04:43,617 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44706 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 00:04:43,746 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:04:45,073 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 28 proven. 671 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked.
[2023-11-29 00:04:45,073 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:04:45,339 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked.
[2023-11-29 00:04:45,339 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:04:45,339 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588583795]
[2023-11-29 00:04:45,339 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:04:45,340 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044537509]
[2023-11-29 00:04:45,340 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044537509] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:04:45,340 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:04:45,346 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12
[2023-11-29 00:04:45,346 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072484296]
[2023-11-29 00:04:45,346 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:04:45,351 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-29 00:04:45,351 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:04:45,356 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-29 00:04:45,356 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132
[2023-11-29 00:04:45,359 INFO  L87              Difference]: Start difference. First operand 13426 states and 22356 transitions. Second operand  has 6 states, 6 states have (on average 1343.8333333333333) internal successors, (8063), 6 states have internal predecessors, (8063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:05:16,936 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:05:16,936 INFO  L93              Difference]: Finished difference Result 58461 states and 96936 transitions.
[2023-11-29 00:05:16,936 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-11-29 00:05:16,938 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 1343.8333333333333) internal successors, (8063), 6 states have internal predecessors, (8063), 0 states have call successors, (0), 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 8938
[2023-11-29 00:05:16,945 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:05:16,981 INFO  L225             Difference]: With dead ends: 58461
[2023-11-29 00:05:16,981 INFO  L226             Difference]: Without dead ends: 36528
[2023-11-29 00:05:16,989 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17876 GetRequests, 17864 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182
[2023-11-29 00:05:16,990 INFO  L413           NwaCegarLoop]: 31799 mSDtfsCounter, 53943 mSDsluCounter, 91269 mSDsCounter, 0 mSdLazyCounter, 40593 mSolverCounterSat, 1207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53943 SdHoareTripleChecker+Valid, 123068 SdHoareTripleChecker+Invalid, 41800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.6s SdHoareTripleChecker+Time, 1207 IncrementalHoareTripleChecker+Valid, 40593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.9s IncrementalHoareTripleChecker+Time
[2023-11-29 00:05:16,990 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [53943 Valid, 123068 Invalid, 41800 Unknown, 0 Unchecked, 0.6s Time], IncrementalHoareTripleChecker [1207 Valid, 40593 Invalid, 0 Unknown, 0 Unchecked, 29.9s Time]
[2023-11-29 00:05:17,020 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 36528 states.
[2023-11-29 00:05:17,197 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 36528 to 13428.
[2023-11-29 00:05:17,211 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13428 states, 13427 states have (on average 1.6651523050569748) internal successors, (22358), 13427 states have internal predecessors, (22358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:05:17,230 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13428 states to 13428 states and 22358 transitions.
[2023-11-29 00:05:17,230 INFO  L78                 Accepts]: Start accepts. Automaton has 13428 states and 22358 transitions. Word has length 8938
[2023-11-29 00:05:17,235 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:05:17,235 INFO  L495      AbstractCegarLoop]: Abstraction has 13428 states and 22358 transitions.
[2023-11-29 00:05:17,237 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 1343.8333333333333) internal successors, (8063), 6 states have internal predecessors, (8063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:05:17,237 INFO  L276                IsEmpty]: Start isEmpty. Operand 13428 states and 22358 transitions.
[2023-11-29 00:05:17,548 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8940
[2023-11-29 00:05:17,548 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:05:17,550 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 00:05:17,687 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0
[2023-11-29 00:05:17,750 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16
[2023-11-29 00:05:17,751 INFO  L420      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:05:17,751 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:05:17,752 INFO  L85        PathProgramCache]: Analyzing trace with hash 2130999924, now seen corresponding path program 1 times
[2023-11-29 00:05:17,752 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:05:17,752 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699964578]
[2023-11-29 00:05:17,753 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:05:17,753 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:05:18,752 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:05:18,752 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889766085]
[2023-11-29 00:05:18,754 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:05:18,754 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:05:18,754 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:05:18,755 INFO  L229       MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:05:18,756 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process
[2023-11-29 00:05:31,060 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:05:31,381 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44709 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:05:31,477 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:05:32,488 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 30 proven. 671 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked.
[2023-11-29 00:05:32,488 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:05:32,654 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked.
[2023-11-29 00:05:32,654 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:05:32,654 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699964578]
[2023-11-29 00:05:32,654 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:05:32,654 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889766085]
[2023-11-29 00:05:32,654 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889766085] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:05:32,654 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:05:32,660 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:05:32,660 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596597142]
[2023-11-29 00:05:32,660 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:05:32,664 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:05:32,664 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:05:32,668 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:05:32,668 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:05:32,670 INFO  L87              Difference]: Start difference. First operand 13428 states and 22358 transitions. Second operand  has 5 states, 5 states have (on average 1613.2) internal successors, (8066), 5 states have internal predecessors, (8066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:05:49,282 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:05:49,282 INFO  L93              Difference]: Finished difference Result 46886 states and 77659 transitions.
[2023-11-29 00:05:49,283 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:05:49,284 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1613.2) internal successors, (8066), 5 states have internal predecessors, (8066), 0 states have call successors, (0), 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 8939
[2023-11-29 00:05:49,291 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:05:49,312 INFO  L225             Difference]: With dead ends: 46886
[2023-11-29 00:05:49,312 INFO  L226             Difference]: Without dead ends: 24946
[2023-11-29 00:05:49,325 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17877 GetRequests, 17868 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 00:05:49,326 INFO  L413           NwaCegarLoop]: 31789 mSDtfsCounter, 50282 mSDsluCounter, 31587 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50282 SdHoareTripleChecker+Valid, 63376 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time
[2023-11-29 00:05:49,326 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50282 Valid, 63376 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 15.8s Time]
[2023-11-29 00:05:49,354 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24946 states.
[2023-11-29 00:05:49,506 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24946 to 13430.
[2023-11-29 00:05:49,518 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13430 states, 13429 states have (on average 1.665053242981607) internal successors, (22360), 13429 states have internal predecessors, (22360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:05:49,534 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13430 states to 13430 states and 22360 transitions.
[2023-11-29 00:05:49,535 INFO  L78                 Accepts]: Start accepts. Automaton has 13430 states and 22360 transitions. Word has length 8939
[2023-11-29 00:05:49,539 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:05:49,539 INFO  L495      AbstractCegarLoop]: Abstraction has 13430 states and 22360 transitions.
[2023-11-29 00:05:49,541 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1613.2) internal successors, (8066), 5 states have internal predecessors, (8066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:05:49,541 INFO  L276                IsEmpty]: Start isEmpty. Operand 13430 states and 22360 transitions.
[2023-11-29 00:05:49,932 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8941
[2023-11-29 00:05:49,933 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:05:49,934 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 00:05:50,069 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0
[2023-11-29 00:05:50,134 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17
[2023-11-29 00:05:50,135 INFO  L420      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:05:50,136 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:05:50,137 INFO  L85        PathProgramCache]: Analyzing trace with hash 123849464, now seen corresponding path program 1 times
[2023-11-29 00:05:50,137 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:05:50,138 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528183204]
[2023-11-29 00:05:50,138 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:05:50,139 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:05:50,992 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:05:50,992 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [807213729]
[2023-11-29 00:05:50,994 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:05:50,994 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:05:50,994 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:05:50,995 INFO  L229       MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:05:50,996 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process
[2023-11-29 00:06:02,884 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:06:03,199 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44712 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:06:03,351 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:06:04,541 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 32 proven. 671 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked.
[2023-11-29 00:06:04,541 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:06:04,732 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 872 trivial. 0 not checked.
[2023-11-29 00:06:04,732 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:06:04,732 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528183204]
[2023-11-29 00:06:04,732 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:06:04,732 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807213729]
[2023-11-29 00:06:04,732 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [807213729] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:06:04,732 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:06:04,737 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:06:04,737 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356219614]
[2023-11-29 00:06:04,737 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:06:04,741 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:06:04,742 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:06:04,745 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:06:04,745 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:06:04,747 INFO  L87              Difference]: Start difference. First operand 13430 states and 22360 transitions. Second operand  has 5 states, 5 states have (on average 1613.8) internal successors, (8069), 5 states have internal predecessors, (8069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:06:21,901 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:06:21,902 INFO  L93              Difference]: Finished difference Result 46894 states and 77667 transitions.
[2023-11-29 00:06:21,902 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:06:21,903 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1613.8) internal successors, (8069), 5 states have internal predecessors, (8069), 0 states have call successors, (0), 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 8940
[2023-11-29 00:06:21,909 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:06:21,926 INFO  L225             Difference]: With dead ends: 46894
[2023-11-29 00:06:21,926 INFO  L226             Difference]: Without dead ends: 24947
[2023-11-29 00:06:21,934 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17879 GetRequests, 17870 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 00:06:21,934 INFO  L413           NwaCegarLoop]: 31781 mSDtfsCounter, 34712 mSDsluCounter, 48144 mSDsCounter, 0 mSdLazyCounter, 22495 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34712 SdHoareTripleChecker+Valid, 79925 SdHoareTripleChecker+Invalid, 23700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 22495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time
[2023-11-29 00:06:21,934 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34712 Valid, 79925 Invalid, 23700 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 22495 Invalid, 0 Unknown, 0 Unchecked, 16.3s Time]
[2023-11-29 00:06:21,957 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24947 states.
[2023-11-29 00:06:22,097 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24947 to 13432.
[2023-11-29 00:06:22,109 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13432 states, 13431 states have (on average 1.6649542104087558) internal successors, (22362), 13431 states have internal predecessors, (22362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:06:22,130 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13432 states to 13432 states and 22362 transitions.
[2023-11-29 00:06:22,131 INFO  L78                 Accepts]: Start accepts. Automaton has 13432 states and 22362 transitions. Word has length 8940
[2023-11-29 00:06:22,136 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:06:22,136 INFO  L495      AbstractCegarLoop]: Abstraction has 13432 states and 22362 transitions.
[2023-11-29 00:06:22,137 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1613.8) internal successors, (8069), 5 states have internal predecessors, (8069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:06:22,137 INFO  L276                IsEmpty]: Start isEmpty. Operand 13432 states and 22362 transitions.
[2023-11-29 00:06:22,437 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8942
[2023-11-29 00:06:22,438 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:06:22,439 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 00:06:22,573 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0
[2023-11-29 00:06:22,640 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:06:22,640 INFO  L420      AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:06:22,640 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:06:22,642 INFO  L85        PathProgramCache]: Analyzing trace with hash 43432592, now seen corresponding path program 1 times
[2023-11-29 00:06:22,642 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:06:22,643 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806885765]
[2023-11-29 00:06:22,644 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:06:22,644 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:06:23,538 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:06:23,538 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1929547358]
[2023-11-29 00:06:23,540 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:06:23,540 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:06:23,540 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:06:23,541 INFO  L229       MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:06:23,542 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process
[2023-11-29 00:06:35,398 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:06:35,706 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44716 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:06:35,817 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:06:36,791 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 34 proven. 671 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked.
[2023-11-29 00:06:36,791 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:06:36,962 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked.
[2023-11-29 00:06:36,962 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:06:36,962 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806885765]
[2023-11-29 00:06:36,962 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:06:36,962 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929547358]
[2023-11-29 00:06:36,962 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929547358] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:06:36,962 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:06:36,967 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:06:36,967 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001059841]
[2023-11-29 00:06:36,967 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:06:36,971 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:06:36,971 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:06:36,974 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:06:36,974 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:06:36,977 INFO  L87              Difference]: Start difference. First operand 13432 states and 22362 transitions. Second operand  has 5 states, 5 states have (on average 1614.4) internal successors, (8072), 5 states have internal predecessors, (8072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:06:53,246 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:06:53,247 INFO  L93              Difference]: Finished difference Result 46902 states and 77675 transitions.
[2023-11-29 00:06:53,247 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:06:53,249 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1614.4) internal successors, (8072), 5 states have internal predecessors, (8072), 0 states have call successors, (0), 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 8941
[2023-11-29 00:06:53,255 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:06:53,277 INFO  L225             Difference]: With dead ends: 46902
[2023-11-29 00:06:53,277 INFO  L226             Difference]: Without dead ends: 24948
[2023-11-29 00:06:53,289 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17881 GetRequests, 17872 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 00:06:53,290 INFO  L413           NwaCegarLoop]: 31773 mSDtfsCounter, 34721 mSDsluCounter, 45914 mSDsCounter, 0 mSdLazyCounter, 21619 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34721 SdHoareTripleChecker+Valid, 77687 SdHoareTripleChecker+Invalid, 22824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 21619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time
[2023-11-29 00:06:53,290 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34721 Valid, 77687 Invalid, 22824 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 21619 Invalid, 0 Unknown, 0 Unchecked, 15.5s Time]
[2023-11-29 00:06:53,318 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24948 states.
[2023-11-29 00:06:53,467 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24948 to 13434.
[2023-11-29 00:06:53,481 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13434 states, 13433 states have (on average 1.6648552073252438) internal successors, (22364), 13433 states have internal predecessors, (22364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:06:53,499 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13434 states to 13434 states and 22364 transitions.
[2023-11-29 00:06:53,500 INFO  L78                 Accepts]: Start accepts. Automaton has 13434 states and 22364 transitions. Word has length 8941
[2023-11-29 00:06:53,505 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:06:53,505 INFO  L495      AbstractCegarLoop]: Abstraction has 13434 states and 22364 transitions.
[2023-11-29 00:06:53,506 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1614.4) internal successors, (8072), 5 states have internal predecessors, (8072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:06:53,507 INFO  L276                IsEmpty]: Start isEmpty. Operand 13434 states and 22364 transitions.
[2023-11-29 00:06:53,892 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8943
[2023-11-29 00:06:53,893 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:06:53,894 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 00:06:54,021 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0
[2023-11-29 00:06:54,095 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:06:54,095 INFO  L420      AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:06:54,096 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:06:54,097 INFO  L85        PathProgramCache]: Analyzing trace with hash -474507296, now seen corresponding path program 1 times
[2023-11-29 00:06:54,098 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:06:54,098 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28800998]
[2023-11-29 00:06:54,098 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:06:54,098 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:06:55,066 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:06:55,066 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [105839836]
[2023-11-29 00:06:55,068 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:06:55,068 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:06:55,068 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:06:55,069 INFO  L229       MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:06:55,070 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process
[2023-11-29 00:07:08,143 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:07:08,494 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44719 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:07:08,653 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:07:09,655 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 36 proven. 671 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked.
[2023-11-29 00:07:09,656 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:07:09,825 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 868 trivial. 0 not checked.
[2023-11-29 00:07:09,826 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:07:09,826 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28800998]
[2023-11-29 00:07:09,826 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:07:09,826 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105839836]
[2023-11-29 00:07:09,826 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [105839836] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:07:09,826 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:07:09,831 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:07:09,831 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351679214]
[2023-11-29 00:07:09,831 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:07:09,834 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:07:09,834 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:07:09,838 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:07:09,838 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:07:09,840 INFO  L87              Difference]: Start difference. First operand 13434 states and 22364 transitions. Second operand  has 5 states, 5 states have (on average 1615.0) internal successors, (8075), 5 states have internal predecessors, (8075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:07:24,657 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:07:24,658 INFO  L93              Difference]: Finished difference Result 46910 states and 77683 transitions.
[2023-11-29 00:07:24,658 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:07:24,659 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1615.0) internal successors, (8075), 5 states have internal predecessors, (8075), 0 states have call successors, (0), 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 8942
[2023-11-29 00:07:24,665 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:07:24,687 INFO  L225             Difference]: With dead ends: 46910
[2023-11-29 00:07:24,687 INFO  L226             Difference]: Without dead ends: 24949
[2023-11-29 00:07:24,699 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17883 GetRequests, 17874 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 00:07:24,700 INFO  L413           NwaCegarLoop]: 31765 mSDtfsCounter, 50242 mSDsluCounter, 31573 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50242 SdHoareTripleChecker+Valid, 63338 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time
[2023-11-29 00:07:24,700 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50242 Valid, 63338 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 14.0s Time]
[2023-11-29 00:07:24,725 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24949 states.
[2023-11-29 00:07:24,873 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24949 to 13436.
[2023-11-29 00:07:24,885 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13436 states, 13435 states have (on average 1.664756233717901) internal successors, (22366), 13435 states have internal predecessors, (22366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:07:24,902 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13436 states to 13436 states and 22366 transitions.
[2023-11-29 00:07:24,902 INFO  L78                 Accepts]: Start accepts. Automaton has 13436 states and 22366 transitions. Word has length 8942
[2023-11-29 00:07:24,907 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:07:24,907 INFO  L495      AbstractCegarLoop]: Abstraction has 13436 states and 22366 transitions.
[2023-11-29 00:07:24,909 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1615.0) internal successors, (8075), 5 states have internal predecessors, (8075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:07:24,909 INFO  L276                IsEmpty]: Start isEmpty. Operand 13436 states and 22366 transitions.
[2023-11-29 00:07:25,216 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8944
[2023-11-29 00:07:25,216 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:07:25,217 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 00:07:25,353 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0
[2023-11-29 00:07:25,418 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:07:25,418 INFO  L420      AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:07:25,419 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:07:25,421 INFO  L85        PathProgramCache]: Analyzing trace with hash 1058981034, now seen corresponding path program 1 times
[2023-11-29 00:07:25,421 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:07:25,421 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608768214]
[2023-11-29 00:07:25,424 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:07:25,424 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:07:26,348 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:07:26,348 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090454936]
[2023-11-29 00:07:26,350 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:07:26,350 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:07:26,350 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:07:26,351 INFO  L229       MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:07:26,352 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process
[2023-11-29 00:07:38,020 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:07:38,336 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44722 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:07:38,453 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:07:39,436 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 38 proven. 671 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked.
[2023-11-29 00:07:39,436 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:07:39,615 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked.
[2023-11-29 00:07:39,615 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:07:39,616 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608768214]
[2023-11-29 00:07:39,616 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:07:39,616 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090454936]
[2023-11-29 00:07:39,616 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090454936] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:07:39,616 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:07:39,622 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:07:39,622 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254287550]
[2023-11-29 00:07:39,622 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:07:39,626 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:07:39,626 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:07:39,629 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:07:39,629 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:07:39,630 INFO  L87              Difference]: Start difference. First operand 13436 states and 22366 transitions. Second operand  has 5 states, 5 states have (on average 1615.6) internal successors, (8078), 5 states have internal predecessors, (8078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:07:56,597 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:07:56,597 INFO  L93              Difference]: Finished difference Result 46918 states and 77691 transitions.
[2023-11-29 00:07:56,597 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:07:56,599 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1615.6) internal successors, (8078), 5 states have internal predecessors, (8078), 0 states have call successors, (0), 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 8943
[2023-11-29 00:07:56,605 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:07:56,625 INFO  L225             Difference]: With dead ends: 46918
[2023-11-29 00:07:56,625 INFO  L226             Difference]: Without dead ends: 24950
[2023-11-29 00:07:56,635 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17885 GetRequests, 17876 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 00:07:56,636 INFO  L413           NwaCegarLoop]: 31757 mSDtfsCounter, 34711 mSDsluCounter, 45898 mSDsCounter, 0 mSdLazyCounter, 21619 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34711 SdHoareTripleChecker+Valid, 77655 SdHoareTripleChecker+Invalid, 22824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 21619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time
[2023-11-29 00:07:56,636 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34711 Valid, 77655 Invalid, 22824 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 21619 Invalid, 0 Unknown, 0 Unchecked, 16.1s Time]
[2023-11-29 00:07:56,662 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24950 states.
[2023-11-29 00:07:56,805 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24950 to 13438.
[2023-11-29 00:07:56,817 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13438 states, 13437 states have (on average 1.6646572895735656) internal successors, (22368), 13437 states have internal predecessors, (22368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:07:56,833 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13438 states to 13438 states and 22368 transitions.
[2023-11-29 00:07:56,834 INFO  L78                 Accepts]: Start accepts. Automaton has 13438 states and 22368 transitions. Word has length 8943
[2023-11-29 00:07:56,839 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:07:56,839 INFO  L495      AbstractCegarLoop]: Abstraction has 13438 states and 22368 transitions.
[2023-11-29 00:07:56,840 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1615.6) internal successors, (8078), 5 states have internal predecessors, (8078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:07:56,841 INFO  L276                IsEmpty]: Start isEmpty. Operand 13438 states and 22368 transitions.
[2023-11-29 00:07:57,152 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8945
[2023-11-29 00:07:57,152 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:07:57,154 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 00:07:57,290 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0
[2023-11-29 00:07:57,354 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:07:57,355 INFO  L420      AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:07:57,355 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:07:57,357 INFO  L85        PathProgramCache]: Analyzing trace with hash 2086707910, now seen corresponding path program 1 times
[2023-11-29 00:07:57,357 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:07:57,357 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260754474]
[2023-11-29 00:07:57,359 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:07:57,359 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:07:58,182 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:07:58,182 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297213878]
[2023-11-29 00:07:58,183 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:07:58,184 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:07:58,184 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:07:58,184 INFO  L229       MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:07:58,185 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process
[2023-11-29 00:08:10,146 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:08:10,480 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44725 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:08:10,597 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:08:11,596 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 40 proven. 671 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked.
[2023-11-29 00:08:11,596 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:08:11,789 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 864 trivial. 0 not checked.
[2023-11-29 00:08:11,790 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:08:11,790 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260754474]
[2023-11-29 00:08:11,790 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:08:11,790 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297213878]
[2023-11-29 00:08:11,790 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297213878] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:08:11,790 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:08:11,796 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:08:11,797 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449746274]
[2023-11-29 00:08:11,797 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:08:11,801 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:08:11,801 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:08:11,804 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:08:11,804 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:08:11,806 INFO  L87              Difference]: Start difference. First operand 13438 states and 22368 transitions. Second operand  has 5 states, 5 states have (on average 1616.2) internal successors, (8081), 5 states have internal predecessors, (8081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:08:26,594 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:08:26,594 INFO  L93              Difference]: Finished difference Result 46926 states and 77699 transitions.
[2023-11-29 00:08:26,594 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:08:26,596 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1616.2) internal successors, (8081), 5 states have internal predecessors, (8081), 0 states have call successors, (0), 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 8944
[2023-11-29 00:08:26,602 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:08:26,623 INFO  L225             Difference]: With dead ends: 46926
[2023-11-29 00:08:26,623 INFO  L226             Difference]: Without dead ends: 24951
[2023-11-29 00:08:26,637 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17887 GetRequests, 17878 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 00:08:26,638 INFO  L413           NwaCegarLoop]: 31749 mSDtfsCounter, 50224 mSDsluCounter, 31563 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50224 SdHoareTripleChecker+Valid, 63312 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time
[2023-11-29 00:08:26,638 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50224 Valid, 63312 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 14.0s Time]
[2023-11-29 00:08:26,670 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24951 states.
[2023-11-29 00:08:26,813 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24951 to 13440.
[2023-11-29 00:08:26,825 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13440 states, 13439 states have (on average 1.6645583748790833) internal successors, (22370), 13439 states have internal predecessors, (22370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:08:26,842 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13440 states to 13440 states and 22370 transitions.
[2023-11-29 00:08:26,842 INFO  L78                 Accepts]: Start accepts. Automaton has 13440 states and 22370 transitions. Word has length 8944
[2023-11-29 00:08:26,847 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:08:26,847 INFO  L495      AbstractCegarLoop]: Abstraction has 13440 states and 22370 transitions.
[2023-11-29 00:08:26,849 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1616.2) internal successors, (8081), 5 states have internal predecessors, (8081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:08:26,849 INFO  L276                IsEmpty]: Start isEmpty. Operand 13440 states and 22370 transitions.
[2023-11-29 00:08:27,156 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8946
[2023-11-29 00:08:27,156 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:08:27,158 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 00:08:27,294 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0
[2023-11-29 00:08:27,358 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:08:27,359 INFO  L420      AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:08:27,359 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:08:27,360 INFO  L85        PathProgramCache]: Analyzing trace with hash 692858310, now seen corresponding path program 1 times
[2023-11-29 00:08:27,360 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:08:27,361 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718762279]
[2023-11-29 00:08:27,362 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:08:27,362 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:08:28,198 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:08:28,198 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [764188577]
[2023-11-29 00:08:28,199 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:08:28,199 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:08:28,200 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:08:28,200 INFO  L229       MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:08:28,201 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process
[2023-11-29 00:08:40,466 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:08:40,815 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44729 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:08:40,932 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:08:41,952 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 42 proven. 671 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked.
[2023-11-29 00:08:41,952 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:08:42,146 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked.
[2023-11-29 00:08:42,146 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:08:42,146 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718762279]
[2023-11-29 00:08:42,146 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:08:42,146 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764188577]
[2023-11-29 00:08:42,146 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [764188577] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:08:42,146 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:08:42,152 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:08:42,153 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324655409]
[2023-11-29 00:08:42,153 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:08:42,157 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:08:42,157 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:08:42,160 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:08:42,161 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:08:42,163 INFO  L87              Difference]: Start difference. First operand 13440 states and 22370 transitions. Second operand  has 5 states, 5 states have (on average 1616.8) internal successors, (8084), 5 states have internal predecessors, (8084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:08:59,036 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:08:59,037 INFO  L93              Difference]: Finished difference Result 46934 states and 77707 transitions.
[2023-11-29 00:08:59,037 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:08:59,038 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1616.8) internal successors, (8084), 5 states have internal predecessors, (8084), 0 states have call successors, (0), 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 8945
[2023-11-29 00:08:59,044 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:08:59,063 INFO  L225             Difference]: With dead ends: 46934
[2023-11-29 00:08:59,063 INFO  L226             Difference]: Without dead ends: 24952
[2023-11-29 00:08:59,073 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17889 GetRequests, 17880 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 00:08:59,074 INFO  L413           NwaCegarLoop]: 31741 mSDtfsCounter, 34682 mSDsluCounter, 48094 mSDsCounter, 0 mSdLazyCounter, 22495 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34682 SdHoareTripleChecker+Valid, 79835 SdHoareTripleChecker+Invalid, 23700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 22495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time
[2023-11-29 00:08:59,074 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34682 Valid, 79835 Invalid, 23700 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 22495 Invalid, 0 Unknown, 0 Unchecked, 16.1s Time]
[2023-11-29 00:08:59,099 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24952 states.
[2023-11-29 00:08:59,245 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24952 to 13442.
[2023-11-29 00:08:59,257 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13442 states, 13441 states have (on average 1.6644594896213079) internal successors, (22372), 13441 states have internal predecessors, (22372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:08:59,274 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13442 states to 13442 states and 22372 transitions.
[2023-11-29 00:08:59,275 INFO  L78                 Accepts]: Start accepts. Automaton has 13442 states and 22372 transitions. Word has length 8945
[2023-11-29 00:08:59,280 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:08:59,280 INFO  L495      AbstractCegarLoop]: Abstraction has 13442 states and 22372 transitions.
[2023-11-29 00:08:59,282 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1616.8) internal successors, (8084), 5 states have internal predecessors, (8084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:08:59,282 INFO  L276                IsEmpty]: Start isEmpty. Operand 13442 states and 22372 transitions.
[2023-11-29 00:08:59,590 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8947
[2023-11-29 00:08:59,590 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:08:59,592 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 00:08:59,728 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0
[2023-11-29 00:08:59,792 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:08:59,793 INFO  L420      AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:08:59,793 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:08:59,794 INFO  L85        PathProgramCache]: Analyzing trace with hash -330678098, now seen corresponding path program 1 times
[2023-11-29 00:08:59,794 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:08:59,794 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091002548]
[2023-11-29 00:08:59,795 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:08:59,795 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:09:00,833 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:09:00,833 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1160620398]
[2023-11-29 00:09:00,835 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:09:00,835 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:09:00,835 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:09:00,836 INFO  L229       MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:09:00,838 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e07f77e-d96d-41c2-80d1-e2a997deaa58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process
[2023-11-29 00:09:12,752 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:09:13,078 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44732 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 00:09:13,196 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:09:14,238 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 44 proven. 671 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked.
[2023-11-29 00:09:14,238 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:09:14,466 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked.
[2023-11-29 00:09:14,466 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:09:14,466 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091002548]
[2023-11-29 00:09:14,466 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:09:14,466 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160620398]
[2023-11-29 00:09:14,466 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160620398] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:09:14,466 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:09:14,471 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12
[2023-11-29 00:09:14,471 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514146587]
[2023-11-29 00:09:14,471 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:09:14,474 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-29 00:09:14,475 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:09:14,478 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-29 00:09:14,478 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132
[2023-11-29 00:09:14,480 INFO  L87              Difference]: Start difference. First operand 13442 states and 22372 transitions. Second operand  has 6 states, 6 states have (on average 1347.8333333333333) internal successors, (8087), 6 states have internal predecessors, (8087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)