./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.4.prop2-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_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/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_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.4.prop2-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/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_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/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 d075c9bde33ccbcdceb96a0c69964ffaf31322f8f731139fa605ec9d8bb36b25
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-11-28 23:57:03,995 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-28 23:57:04,057 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-28 23:57:04,063 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-28 23:57:04,064 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-28 23:57:04,089 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-28 23:57:04,089 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-28 23:57:04,090 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-28 23:57:04,091 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-28 23:57:04,091 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-28 23:57:04,092 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-28 23:57:04,092 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-28 23:57:04,093 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-28 23:57:04,093 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-28 23:57:04,094 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-28 23:57:04,094 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-28 23:57:04,095 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-28 23:57:04,095 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-28 23:57:04,096 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-28 23:57:04,096 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-28 23:57:04,097 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-28 23:57:04,097 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-28 23:57:04,098 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-28 23:57:04,098 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-28 23:57:04,099 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-28 23:57:04,099 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-28 23:57:04,099 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-28 23:57:04,100 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-28 23:57:04,100 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-28 23:57:04,101 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-28 23:57:04,101 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-28 23:57:04,101 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-28 23:57:04,102 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-28 23:57:04,102 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-28 23:57:04,103 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-28 23:57:04,103 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-28 23:57:04,103 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-28 23:57:04,103 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-28 23:57:04,104 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-28 23:57:04,104 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_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/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_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/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 -> d075c9bde33ccbcdceb96a0c69964ffaf31322f8f731139fa605ec9d8bb36b25
[2023-11-28 23:57:04,326 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-28 23:57:04,356 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-28 23:57:04,358 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-28 23:57:04,359 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-28 23:57:04,360 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-28 23:57:04,361 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.4.prop2-back-serstep.c
[2023-11-28 23:57:07,114 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-28 23:57:07,664 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-28 23:57:07,664 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.4.prop2-back-serstep.c
[2023-11-28 23:57:07,717 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/data/469c0468c/1b71ed675baa420093dfb3ddc32a4174/FLAG4916a3d0a
[2023-11-28 23:57:07,733 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/data/469c0468c/1b71ed675baa420093dfb3ddc32a4174
[2023-11-28 23:57:07,736 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-28 23:57:07,737 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-28 23:57:07,739 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-28 23:57:07,739 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-28 23:57:07,744 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-28 23:57:07,745 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:57:07" (1/1) ...
[2023-11-28 23:57:07,746 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61529a62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:07, skipping insertion in model container
[2023-11-28 23:57:07,747 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:57:07" (1/1) ...
[2023-11-28 23:57:08,004 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-28 23:57:08,345 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_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.4.prop2-back-serstep.c[1180,1193]
[2023-11-28 23:57:09,771 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-28 23:57:09,781 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-28 23:57:09,793 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_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.4.prop2-back-serstep.c[1180,1193]
[2023-11-28 23:57:10,829 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-28 23:57:10,844 INFO  L206         MainTranslator]: Completed translation
[2023-11-28 23:57:10,845 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:10 WrapperNode
[2023-11-28 23:57:10,845 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-28 23:57:10,846 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-28 23:57:10,846 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-28 23:57:10,846 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-28 23:57:10,854 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:10" (1/1) ...
[2023-11-28 23:57:11,132 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:10" (1/1) ...
[2023-11-28 23:57:14,743 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55715
[2023-11-28 23:57:14,744 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-28 23:57:14,744 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-28 23:57:14,745 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-28 23:57:14,745 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-28 23:57:14,756 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:10" (1/1) ...
[2023-11-28 23:57:14,756 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:10" (1/1) ...
[2023-11-28 23:57:15,607 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:10" (1/1) ...
[2023-11-28 23:57:16,096 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 23:57:16,096 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:10" (1/1) ...
[2023-11-28 23:57:16,096 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:10" (1/1) ...
[2023-11-28 23:57:16,899 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:10" (1/1) ...
[2023-11-28 23:57:17,265 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:10" (1/1) ...
[2023-11-28 23:57:17,483 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:10" (1/1) ...
[2023-11-28 23:57:17,627 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:10" (1/1) ...
[2023-11-28 23:57:18,317 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-28 23:57:18,318 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-28 23:57:18,318 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-28 23:57:18,319 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-28 23:57:18,319 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:10" (1/1) ...
[2023-11-28 23:57:18,326 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-28 23:57:18,336 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:57:18,349 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2023-11-28 23:57:18,351 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2023-11-28 23:57:18,383 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-28 23:57:18,383 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-11-28 23:57:18,384 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-28 23:57:18,384 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-28 23:57:20,509 INFO  L241             CfgBuilder]: Building ICFG
[2023-11-28 23:57:20,511 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-28 23:57:45,118 INFO  L282             CfgBuilder]: Performing block encoding
[2023-11-28 23:57:45,979 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-28 23:57:45,979 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-28 23:57:45,985 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:57:45 BoogieIcfgContainer
[2023-11-28 23:57:45,986 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-28 23:57:45,988 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-28 23:57:45,989 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-28 23:57:45,992 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-28 23:57:45,992 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 11:57:07" (1/3) ...
[2023-11-28 23:57:45,993 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@688c7274 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:57:45, skipping insertion in model container
[2023-11-28 23:57:45,993 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:10" (2/3) ...
[2023-11-28 23:57:45,994 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@688c7274 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:57:45, skipping insertion in model container
[2023-11-28 23:57:45,994 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:57:45" (3/3) ...
[2023-11-28 23:57:45,995 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.pgm_protocol.4.prop2-back-serstep.c
[2023-11-28 23:57:46,014 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-28 23:57:46,015 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-28 23:57:46,221 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-28 23:57:46,228 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;@46c56dbb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-28 23:57:46,229 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-28 23:57:46,266 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 12055 states, 12053 states have (on average 1.6668879117232225) internal successors, (20091), 12054 states have internal predecessors, (20091), 0 states have call successors, (0), 0 states 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 23:57:46,344 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1255
[2023-11-28 23:57:46,344 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:57:46,346 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 23:57:46,346 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:57:46,351 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:57:46,352 INFO  L85        PathProgramCache]: Analyzing trace with hash -205302712, now seen corresponding path program 1 times
[2023-11-28 23:57:46,361 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:57:46,362 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396196491]
[2023-11-28 23:57:46,363 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:57:46,363 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:57:47,577 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:57:54,548 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 23:57:54,548 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:57:54,549 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396196491]
[2023-11-28 23:57:54,550 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396196491] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:57:54,550 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:57:54,551 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 23:57:54,552 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798812898]
[2023-11-28 23:57:54,553 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:57:54,562 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 23:57:54,562 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:57:54,599 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 23:57:54,600 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 23:57:54,637 INFO  L87              Difference]: Start difference. First operand  has 12055 states, 12053 states have (on average 1.6668879117232225) internal successors, (20091), 12054 states have internal predecessors, (20091), 0 states have call successors, (0), 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 23:57:55,528 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:57:55,529 INFO  L93              Difference]: Finished difference Result 23587 states and 39313 transitions.
[2023-11-28 23:57:55,530 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 23:57:55,533 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 23:57:55,542 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:57:55,627 INFO  L225             Difference]: With dead ends: 23587
[2023-11-28 23:57:55,628 INFO  L226             Difference]: Without dead ends: 12055
[2023-11-28 23:57:55,649 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 23:57:55,653 INFO  L413           NwaCegarLoop]: 20084 mSDtfsCounter, 1 mSDsluCounter, 40163 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 60247 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 23:57:55,654 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 60247 Invalid, 13 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:57:55,702 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12055 states.
[2023-11-28 23:57:55,966 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12055 to 12055.
[2023-11-28 23:57:55,998 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12055 states, 12054 states have (on average 1.666583706653393) internal successors, (20089), 12054 states have internal predecessors, (20089), 0 states have call successors, (0), 0 states 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 23:57:56,051 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12055 states to 12055 states and 20089 transitions.
[2023-11-28 23:57:56,052 INFO  L78                 Accepts]: Start accepts. Automaton has 12055 states and 20089 transitions. Word has length 1254
[2023-11-28 23:57:56,055 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:57:56,055 INFO  L495      AbstractCegarLoop]: Abstraction has 12055 states and 20089 transitions.
[2023-11-28 23:57:56,057 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 23:57:56,057 INFO  L276                IsEmpty]: Start isEmpty. Operand 12055 states and 20089 transitions.
[2023-11-28 23:57:56,135 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1256
[2023-11-28 23:57:56,135 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:57:56,136 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 23:57:56,136 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-28 23:57:56,137 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:57:56,137 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:57:56,138 INFO  L85        PathProgramCache]: Analyzing trace with hash -2067684328, now seen corresponding path program 1 times
[2023-11-28 23:57:56,139 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:57:56,139 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526349530]
[2023-11-28 23:57:56,140 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:57:56,140 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:57:56,910 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:57:59,853 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 23:57:59,854 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:57:59,854 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526349530]
[2023-11-28 23:57:59,854 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526349530] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:57:59,855 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:57:59,855 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 23:57:59,855 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488084169]
[2023-11-28 23:57:59,856 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:57:59,859 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 23:57:59,859 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:57:59,861 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 23:57:59,862 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 23:57:59,863 INFO  L87              Difference]: Start difference. First operand 12055 states and 20089 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 23:58:00,468 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:58:00,469 INFO  L93              Difference]: Finished difference Result 23590 states and 39311 transitions.
[2023-11-28 23:58:00,470 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 23:58:00,471 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 23:58:00,474 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:58:00,540 INFO  L225             Difference]: With dead ends: 23590
[2023-11-28 23:58:00,541 INFO  L226             Difference]: Without dead ends: 12058
[2023-11-28 23:58:00,556 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 23:58:00,557 INFO  L413           NwaCegarLoop]: 20084 mSDtfsCounter, 1 mSDsluCounter, 40161 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 60245 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:58:00,558 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 60245 Invalid, 15 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:58:00,584 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12058 states.
[2023-11-28 23:58:00,818 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12058 to 12057.
[2023-11-28 23:58:00,843 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12057 states, 12056 states have (on average 1.6664731254147314) internal successors, (20091), 12056 states have internal predecessors, (20091), 0 states have call successors, (0), 0 states 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 23:58:00,881 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12057 states to 12057 states and 20091 transitions.
[2023-11-28 23:58:00,881 INFO  L78                 Accepts]: Start accepts. Automaton has 12057 states and 20091 transitions. Word has length 1255
[2023-11-28 23:58:00,883 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:58:00,884 INFO  L495      AbstractCegarLoop]: Abstraction has 12057 states and 20091 transitions.
[2023-11-28 23:58:00,884 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 23:58:00,885 INFO  L276                IsEmpty]: Start isEmpty. Operand 12057 states and 20091 transitions.
[2023-11-28 23:58:00,903 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1257
[2023-11-28 23:58:00,903 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:58:00,904 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 23:58:00,905 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-28 23:58:00,905 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:58:00,905 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:58:00,907 INFO  L85        PathProgramCache]: Analyzing trace with hash 115870306, now seen corresponding path program 1 times
[2023-11-28 23:58:00,907 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:58:00,907 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133988999]
[2023-11-28 23:58:00,908 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:58:00,908 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:58:01,628 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:58:04,802 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 23:58:04,803 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:58:04,803 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133988999]
[2023-11-28 23:58:04,803 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133988999] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:58:04,803 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:58:04,804 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 23:58:04,804 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642335380]
[2023-11-28 23:58:04,805 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:58:04,807 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 23:58:04,807 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:58:04,810 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 23:58:04,810 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-28 23:58:04,811 INFO  L87              Difference]: Start difference. First operand 12057 states and 20091 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 23:58:05,998 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:58:05,998 INFO  L93              Difference]: Finished difference Result 36465 states and 60766 transitions.
[2023-11-28 23:58:05,999 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 23:58:05,999 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 23:58:06,003 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:58:06,056 INFO  L225             Difference]: With dead ends: 36465
[2023-11-28 23:58:06,056 INFO  L226             Difference]: Without dead ends: 24931
[2023-11-28 23:58:06,070 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 23:58:06,071 INFO  L413           NwaCegarLoop]: 22328 mSDtfsCounter, 78709 mSDsluCounter, 40162 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78709 SdHoareTripleChecker+Valid, 62490 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:58:06,072 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [78709 Valid, 62490 Invalid, 16 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:58:06,112 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24931 states.
[2023-11-28 23:58:06,415 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24931 to 13406.
[2023-11-28 23:58:06,440 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13406 states, 13405 states have (on average 1.6663931368892204) internal successors, (22338), 13405 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 23:58:06,504 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13406 states to 13406 states and 22338 transitions.
[2023-11-28 23:58:06,504 INFO  L78                 Accepts]: Start accepts. Automaton has 13406 states and 22338 transitions. Word has length 1256
[2023-11-28 23:58:06,507 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:58:06,507 INFO  L495      AbstractCegarLoop]: Abstraction has 13406 states and 22338 transitions.
[2023-11-28 23:58:06,508 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 23:58:06,508 INFO  L276                IsEmpty]: Start isEmpty. Operand 13406 states and 22338 transitions.
[2023-11-28 23:58:07,032 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8930
[2023-11-28 23:58:07,032 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:58:07,040 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 23:58:07,040 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-28 23:58:07,041 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:58:07,041 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:58:07,047 INFO  L85        PathProgramCache]: Analyzing trace with hash -345630087, now seen corresponding path program 1 times
[2023-11-28 23:58:07,047 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:58:07,047 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946381830]
[2023-11-28 23:58:07,050 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:58:07,050 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:58:08,669 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:58:08,670 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1651968316]
[2023-11-28 23:58:08,672 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:58:08,672 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:58:08,672 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:58:08,673 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:58:08,677 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-28 23:58:21,801 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:58:22,097 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44687 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-28 23:58:22,313 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:58:22,594 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 23:58:22,594 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:58:22,594 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:58:22,594 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946381830]
[2023-11-28 23:58:22,594 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:58:22,594 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651968316]
[2023-11-28 23:58:22,595 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651968316] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:58:22,595 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:58:22,597 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 23:58:22,598 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076291344]
[2023-11-28 23:58:22,598 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:58:22,607 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 23:58:22,607 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:58:22,614 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 23:58:22,615 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 23:58:22,617 INFO  L87              Difference]: Start difference. First operand 13406 states and 22338 transitions. Second operand  has 4 states, 4 states have (on average 2232.25) internal successors, (8929), 4 states have internal predecessors, (8929), 0 states have call successors, (0), 0 states 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 23:58:23,050 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:58:23,050 INFO  L93              Difference]: Finished difference Result 24950 states and 41574 transitions.
[2023-11-28 23:58:23,051 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 23:58:23,053 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2232.25) internal successors, (8929), 4 states have internal predecessors, (8929), 0 states have call successors, (0), 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
[2023-11-28 23:58:23,058 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:58:23,096 INFO  L225             Difference]: With dead ends: 24950
[2023-11-28 23:58:23,096 INFO  L226             Difference]: Without dead ends: 13416
[2023-11-28 23:58:23,108 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8928 GetRequests, 8926 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 23:58:23,109 INFO  L413           NwaCegarLoop]: 20084 mSDtfsCounter, 12 mSDsluCounter, 40158 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 60242 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 23:58:23,110 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 60242 Invalid, 18 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:58:23,130 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13416 states.
[2023-11-28 23:58:23,323 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13416 to 13408.
[2023-11-28 23:58:23,351 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13408 states, 13407 states have (on average 1.6662937271574552) internal successors, (22340), 13407 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)
[2023-11-28 23:58:23,382 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13408 states to 13408 states and 22340 transitions.
[2023-11-28 23:58:23,383 INFO  L78                 Accepts]: Start accepts. Automaton has 13408 states and 22340 transitions. Word has length 8929
[2023-11-28 23:58:23,390 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:58:23,390 INFO  L495      AbstractCegarLoop]: Abstraction has 13408 states and 22340 transitions.
[2023-11-28 23:58:23,393 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2232.25) internal successors, (8929), 4 states have internal predecessors, (8929), 0 states have call successors, (0), 0 states 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 23:58:23,393 INFO  L276                IsEmpty]: Start isEmpty. Operand 13408 states and 22340 transitions.
[2023-11-28 23:58:23,877 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8930
[2023-11-28 23:58:23,877 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:58:23,882 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]
[2023-11-28 23:58:24,002 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-28 23:58:24,083 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:58:24,083 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:58:24,084 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:58:24,087 INFO  L85        PathProgramCache]: Analyzing trace with hash -2066524601, now seen corresponding path program 1 times
[2023-11-28 23:58:24,087 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:58:24,087 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928171506]
[2023-11-28 23:58:24,088 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:58:24,088 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:58:25,147 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:58:25,147 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1378568356]
[2023-11-28 23:58:25,149 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:58:25,149 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:58:25,149 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:58:25,150 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:58:25,152 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-28 23:58:37,648 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:58:37,955 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44688 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-28 23:58:38,126 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:58:38,409 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 23:58:38,409 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:58:38,409 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:58:38,409 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928171506]
[2023-11-28 23:58:38,409 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:58:38,409 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378568356]
[2023-11-28 23:58:38,409 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378568356] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:58:38,410 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:58:38,413 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 23:58:38,414 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425471251]
[2023-11-28 23:58:38,414 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:58:38,424 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 23:58:38,425 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:58:38,433 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 23:58:38,434 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 23:58:38,437 INFO  L87              Difference]: Start difference. First operand 13408 states and 22340 transitions. Second operand  has 4 states, 4 states have (on average 2232.25) internal successors, (8929), 4 states have internal predecessors, (8929), 0 states have call successors, (0), 0 states 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 23:58:38,787 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:58:38,787 INFO  L93              Difference]: Finished difference Result 24953 states and 41576 transitions.
[2023-11-28 23:58:38,788 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 23:58:38,791 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2232.25) internal successors, (8929), 4 states have internal predecessors, (8929), 0 states have call successors, (0), 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
[2023-11-28 23:58:38,803 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:58:38,821 INFO  L225             Difference]: With dead ends: 24953
[2023-11-28 23:58:38,821 INFO  L226             Difference]: Without dead ends: 13417
[2023-11-28 23:58:38,833 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8928 GetRequests, 8926 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 23:58:38,834 INFO  L413           NwaCegarLoop]: 20084 mSDtfsCounter, 12 mSDsluCounter, 40158 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 60242 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:58:38,835 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 60242 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:58:38,852 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13417 states.
[2023-11-28 23:58:38,992 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13417 to 13409.
[2023-11-28 23:58:39,008 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13409 states, 13408 states have (on average 1.6662440334128878) internal successors, (22341), 13408 states have internal predecessors, (22341), 0 states have call successors, (0), 0 states 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 23:58:39,029 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13409 states to 13409 states and 22341 transitions.
[2023-11-28 23:58:39,030 INFO  L78                 Accepts]: Start accepts. Automaton has 13409 states and 22341 transitions. Word has length 8929
[2023-11-28 23:58:39,038 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:58:39,038 INFO  L495      AbstractCegarLoop]: Abstraction has 13409 states and 22341 transitions.
[2023-11-28 23:58:39,041 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2232.25) internal successors, (8929), 4 states have internal predecessors, (8929), 0 states have call successors, (0), 0 states 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 23:58:39,041 INFO  L276                IsEmpty]: Start isEmpty. Operand 13409 states and 22341 transitions.
[2023-11-28 23:58:39,635 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8930
[2023-11-28 23:58:39,636 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:58:39,640 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]
[2023-11-28 23:58:39,756 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2023-11-28 23:58:39,841 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:58:39,841 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:58:39,842 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:58:39,844 INFO  L85        PathProgramCache]: Analyzing trace with hash 643390741, now seen corresponding path program 1 times
[2023-11-28 23:58:39,845 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:58:39,845 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668241971]
[2023-11-28 23:58:39,846 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:58:39,846 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:58:40,766 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:58:40,766 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825962918]
[2023-11-28 23:58:40,767 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:58:40,768 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:58:40,768 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:58:40,769 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:58:40,771 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-28 23:58:52,936 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:58:53,233 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44689 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-28 23:58:53,658 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:58:55,123 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 23:58:55,123 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 23:58:55,534 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 23:58:55,534 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:58:55,534 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668241971]
[2023-11-28 23:58:55,534 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:58:55,535 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825962918]
[2023-11-28 23:58:55,535 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825962918] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 23:58:55,535 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 23:58:55,540 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12
[2023-11-28 23:58:55,541 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111823587]
[2023-11-28 23:58:55,541 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:58:55,553 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-28 23:58:55,553 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:58:55,564 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-28 23:58:55,565 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132
[2023-11-28 23:58:55,568 INFO  L87              Difference]: Start difference. First operand 13409 states and 22341 transitions. Second operand  has 6 states, 6 states have (on average 1338.6666666666667) internal successors, (8032), 6 states have internal predecessors, (8032), 0 states have call successors, (0), 0 states 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 23:59:24,677 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:59:24,677 INFO  L93              Difference]: Finished difference Result 58339 states and 96803 transitions.
[2023-11-28 23:59:24,678 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-11-28 23:59:24,679 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 1338.6666666666667) internal successors, (8032), 6 states have internal predecessors, (8032), 0 states have call successors, (0), 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
[2023-11-28 23:59:24,687 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:59:24,720 INFO  L225             Difference]: With dead ends: 58339
[2023-11-28 23:59:24,720 INFO  L226             Difference]: Without dead ends: 36476
[2023-11-28 23:59:24,728 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17858 GetRequests, 17846 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 23:59:24,729 INFO  L413           NwaCegarLoop]: 31889 mSDtfsCounter, 69600 mSDsluCounter, 77037 mSDsCounter, 0 mSdLazyCounter, 35796 mSolverCounterSat, 1208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69600 SdHoareTripleChecker+Valid, 108926 SdHoareTripleChecker+Invalid, 37004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 1208 IncrementalHoareTripleChecker+Valid, 35796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.6s IncrementalHoareTripleChecker+Time
[2023-11-28 23:59:24,729 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [69600 Valid, 108926 Invalid, 37004 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [1208 Valid, 35796 Invalid, 0 Unknown, 0 Unchecked, 27.6s Time]
[2023-11-28 23:59:24,771 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 36476 states.
[2023-11-28 23:59:25,048 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 36476 to 13409.
[2023-11-28 23:59:25,062 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13409 states, 13408 states have (on average 1.6662440334128878) internal successors, (22341), 13408 states have internal predecessors, (22341), 0 states have call successors, (0), 0 states 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 23:59:25,090 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13409 states to 13409 states and 22341 transitions.
[2023-11-28 23:59:25,090 INFO  L78                 Accepts]: Start accepts. Automaton has 13409 states and 22341 transitions. Word has length 8929
[2023-11-28 23:59:25,098 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:59:25,098 INFO  L495      AbstractCegarLoop]: Abstraction has 13409 states and 22341 transitions.
[2023-11-28 23:59:25,100 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 1338.6666666666667) internal successors, (8032), 6 states have internal predecessors, (8032), 0 states have call successors, (0), 0 states 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 23:59:25,100 INFO  L276                IsEmpty]: Start isEmpty. Operand 13409 states and 22341 transitions.
[2023-11-28 23:59:25,526 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8931
[2023-11-28 23:59:25,526 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:59:25,531 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 23:59:25,654 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2023-11-28 23:59:25,731 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5
[2023-11-28 23:59:25,732 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:59:25,732 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:59:25,735 INFO  L85        PathProgramCache]: Analyzing trace with hash 70190763, now seen corresponding path program 1 times
[2023-11-28 23:59:25,735 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:59:25,735 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101662039]
[2023-11-28 23:59:25,736 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:59:25,736 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:59:26,684 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:59:26,684 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828782997]
[2023-11-28 23:59:26,686 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:59:26,686 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:59:26,686 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:59:26,687 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:59:26,688 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-28 23:59:40,019 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:59:40,325 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44692 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 23:59:40,555 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:59:42,209 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 23:59:42,209 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 23:59:42,483 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 23:59:42,483 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:59:42,484 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101662039]
[2023-11-28 23:59:42,484 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:59:42,484 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828782997]
[2023-11-28 23:59:42,484 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828782997] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 23:59:42,484 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 23:59:42,489 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 23:59:42,489 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944052728]
[2023-11-28 23:59:42,490 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:59:42,500 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 23:59:42,500 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:59:42,512 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 23:59:42,512 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 23:59:42,514 INFO  L87              Difference]: Start difference. First operand 13409 states and 22341 transitions. Second operand  has 5 states, 5 states have (on average 1607.0) internal successors, (8035), 5 states have internal predecessors, (8035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:00:00,970 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:00:00,970 INFO  L93              Difference]: Finished difference Result 46809 states and 77589 transitions.
[2023-11-29 00:00:00,970 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:00:00,973 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1607.0) internal successors, (8035), 5 states have internal predecessors, (8035), 0 states have call successors, (0), 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 00:00:00,987 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:00:01,025 INFO  L225             Difference]: With dead ends: 46809
[2023-11-29 00:00:01,026 INFO  L226             Difference]: Without dead ends: 24941
[2023-11-29 00:00:01,043 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 00:00:01,045 INFO  L413           NwaCegarLoop]: 31879 mSDtfsCounter, 50377 mSDsluCounter, 31645 mSDsCounter, 0 mSdLazyCounter, 16808 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50377 SdHoareTripleChecker+Valid, 63524 SdHoareTripleChecker+Invalid, 18014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 16808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.2s IncrementalHoareTripleChecker+Time
[2023-11-29 00:00:01,045 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50377 Valid, 63524 Invalid, 18014 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [1206 Valid, 16808 Invalid, 0 Unknown, 0 Unchecked, 17.2s Time]
[2023-11-29 00:00:01,086 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24941 states.
[2023-11-29 00:00:01,342 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24941 to 13411.
[2023-11-29 00:00:01,356 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13411 states, 13410 states have (on average 1.666144668158091) internal successors, (22343), 13410 states have internal predecessors, (22343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:00:01,388 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13411 states to 13411 states and 22343 transitions.
[2023-11-29 00:00:01,388 INFO  L78                 Accepts]: Start accepts. Automaton has 13411 states and 22343 transitions. Word has length 8930
[2023-11-29 00:00:01,396 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:00:01,396 INFO  L495      AbstractCegarLoop]: Abstraction has 13411 states and 22343 transitions.
[2023-11-29 00:00:01,399 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1607.0) internal successors, (8035), 5 states have internal predecessors, (8035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:00:01,399 INFO  L276                IsEmpty]: Start isEmpty. Operand 13411 states and 22343 transitions.
[2023-11-29 00:00:02,283 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8932
[2023-11-29 00:00:02,283 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:00:02,289 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 00:00:02,427 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0
[2023-11-29 00:00:02,489 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:00:02,490 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:00:02,490 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:00:02,494 INFO  L85        PathProgramCache]: Analyzing trace with hash -1194041999, now seen corresponding path program 1 times
[2023-11-29 00:00:02,495 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:00:02,495 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653465892]
[2023-11-29 00:00:02,496 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:00:02,497 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:00:03,892 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:00:03,892 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [474387390]
[2023-11-29 00:00:03,894 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:00:03,894 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:00:03,895 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:00:03,896 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:00:03,897 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-29 00:00:16,866 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:00:17,164 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44696 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:00:17,336 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:00:18,496 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 00:00:18,496 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:00:18,855 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 00:00:18,856 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:00:18,856 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653465892]
[2023-11-29 00:00:18,856 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:00:18,856 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474387390]
[2023-11-29 00:00:18,856 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [474387390] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:00:18,856 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:00:18,861 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:00:18,861 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817931340]
[2023-11-29 00:00:18,861 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:00:18,867 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:00:18,867 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:00:18,873 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:00:18,873 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:00:18,875 INFO  L87              Difference]: Start difference. First operand 13411 states and 22343 transitions. Second operand  has 5 states, 5 states have (on average 1607.6) internal successors, (8038), 5 states have internal predecessors, (8038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:00:35,227 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:00:35,227 INFO  L93              Difference]: Finished difference Result 46817 states and 77597 transitions.
[2023-11-29 00:00:35,227 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:00:35,229 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1607.6) internal successors, (8038), 5 states have internal predecessors, (8038), 0 states have call successors, (0), 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 00:00:35,236 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:00:35,261 INFO  L225             Difference]: With dead ends: 46817
[2023-11-29 00:00:35,261 INFO  L226             Difference]: Without dead ends: 24942
[2023-11-29 00:00:35,273 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 00:00:35,274 INFO  L413           NwaCegarLoop]: 31871 mSDtfsCounter, 34788 mSDsluCounter, 46013 mSDsCounter, 0 mSdLazyCounter, 21636 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34788 SdHoareTripleChecker+Valid, 77884 SdHoareTripleChecker+Invalid, 22842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 21636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time
[2023-11-29 00:00:35,274 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34788 Valid, 77884 Invalid, 22842 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 21636 Invalid, 0 Unknown, 0 Unchecked, 15.5s Time]
[2023-11-29 00:00:35,297 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24942 states.
[2023-11-29 00:00:35,442 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24942 to 13413.
[2023-11-29 00:00:35,454 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13413 states, 13412 states have (on average 1.6660453325380256) internal successors, (22345), 13412 states have internal predecessors, (22345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:00:35,470 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13413 states to 13413 states and 22345 transitions.
[2023-11-29 00:00:35,471 INFO  L78                 Accepts]: Start accepts. Automaton has 13413 states and 22345 transitions. Word has length 8931
[2023-11-29 00:00:35,475 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:00:35,475 INFO  L495      AbstractCegarLoop]: Abstraction has 13413 states and 22345 transitions.
[2023-11-29 00:00:35,477 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1607.6) internal successors, (8038), 5 states have internal predecessors, (8038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:00:35,477 INFO  L276                IsEmpty]: Start isEmpty. Operand 13413 states and 22345 transitions.
[2023-11-29 00:00:35,860 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8933
[2023-11-29 00:00:35,860 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:00:35,863 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 00:00:35,993 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0
[2023-11-29 00:00:36,064 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:00:36,064 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:00:36,065 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:00:36,068 INFO  L85        PathProgramCache]: Analyzing trace with hash -980644525, now seen corresponding path program 1 times
[2023-11-29 00:00:36,068 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:00:36,068 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862286504]
[2023-11-29 00:00:36,069 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:00:36,069 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:00:36,887 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:00:36,887 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232463495]
[2023-11-29 00:00:36,889 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:00:36,889 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:00:36,889 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:00:36,890 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:00:36,890 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-29 00:00:48,939 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:00:49,234 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44699 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:00:49,353 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:00:50,465 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 00:00:50,465 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:00:50,643 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 00:00:50,643 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:00:50,643 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862286504]
[2023-11-29 00:00:50,643 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:00:50,643 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232463495]
[2023-11-29 00:00:50,644 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232463495] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:00:50,644 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:00:50,650 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:00:50,650 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369713890]
[2023-11-29 00:00:50,650 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:00:50,661 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:00:50,661 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:00:50,669 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:00:50,670 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:00:50,672 INFO  L87              Difference]: Start difference. First operand 13413 states and 22345 transitions. Second operand  has 5 states, 5 states have (on average 1608.2) internal successors, (8041), 5 states have internal predecessors, (8041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:01:05,838 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:01:05,839 INFO  L93              Difference]: Finished difference Result 46825 states and 77605 transitions.
[2023-11-29 00:01:05,839 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:01:05,840 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1608.2) internal successors, (8041), 5 states have internal predecessors, (8041), 0 states have call successors, (0), 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 00:01:05,847 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:01:05,865 INFO  L225             Difference]: With dead ends: 46825
[2023-11-29 00:01:05,865 INFO  L226             Difference]: Without dead ends: 24943
[2023-11-29 00:01:05,878 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 00:01:05,879 INFO  L413           NwaCegarLoop]: 31863 mSDtfsCounter, 50363 mSDsluCounter, 31634 mSDsCounter, 0 mSdLazyCounter, 16808 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50363 SdHoareTripleChecker+Valid, 63497 SdHoareTripleChecker+Invalid, 18014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 16808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time
[2023-11-29 00:01:05,879 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50363 Valid, 63497 Invalid, 18014 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 16808 Invalid, 0 Unknown, 0 Unchecked, 14.4s Time]
[2023-11-29 00:01:05,906 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24943 states.
[2023-11-29 00:01:06,040 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24943 to 13415.
[2023-11-29 00:01:06,052 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13415 states, 13414 states have (on average 1.6659460265394364) internal successors, (22347), 13414 states have internal predecessors, (22347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:01:06,068 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13415 states to 13415 states and 22347 transitions.
[2023-11-29 00:01:06,068 INFO  L78                 Accepts]: Start accepts. Automaton has 13415 states and 22347 transitions. Word has length 8932
[2023-11-29 00:01:06,072 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:01:06,073 INFO  L495      AbstractCegarLoop]: Abstraction has 13415 states and 22347 transitions.
[2023-11-29 00:01:06,074 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1608.2) internal successors, (8041), 5 states have internal predecessors, (8041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:01:06,074 INFO  L276                IsEmpty]: Start isEmpty. Operand 13415 states and 22347 transitions.
[2023-11-29 00:01:06,394 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8934
[2023-11-29 00:01:06,394 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:01:06,397 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 00:01:06,521 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0
[2023-11-29 00:01:06,598 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:01:06,598 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:01:06,598 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:01:06,602 INFO  L85        PathProgramCache]: Analyzing trace with hash 2118762187, now seen corresponding path program 1 times
[2023-11-29 00:01:06,602 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:01:06,602 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648164202]
[2023-11-29 00:01:06,603 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:01:06,603 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:01:07,525 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:01:07,525 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1385228703]
[2023-11-29 00:01:07,528 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:01:07,528 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:01:07,528 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:01:07,529 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:01:07,530 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-29 00:01:19,446 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:01:19,742 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44702 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:01:19,862 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:01:20,840 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 00:01:20,840 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:01:21,000 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 00:01:21,001 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:01:21,001 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648164202]
[2023-11-29 00:01:21,001 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:01:21,001 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385228703]
[2023-11-29 00:01:21,001 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385228703] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:01:21,001 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:01:21,007 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:01:21,007 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625798084]
[2023-11-29 00:01:21,007 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:01:21,013 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:01:21,013 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:01:21,019 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:01:21,019 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:01:21,021 INFO  L87              Difference]: Start difference. First operand 13415 states and 22347 transitions. Second operand  has 5 states, 5 states have (on average 1608.8) internal successors, (8044), 5 states have internal predecessors, (8044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:01:35,718 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:01:35,718 INFO  L93              Difference]: Finished difference Result 46833 states and 77613 transitions.
[2023-11-29 00:01:35,718 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:01:35,720 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1608.8) internal successors, (8044), 5 states have internal predecessors, (8044), 0 states have call successors, (0), 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 00:01:35,726 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:01:35,748 INFO  L225             Difference]: With dead ends: 46833
[2023-11-29 00:01:35,748 INFO  L226             Difference]: Without dead ends: 24944
[2023-11-29 00:01:35,760 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17865 GetRequests, 17856 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 00:01:35,760 INFO  L413           NwaCegarLoop]: 31855 mSDtfsCounter, 50350 mSDsluCounter, 31630 mSDsCounter, 0 mSdLazyCounter, 16808 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50350 SdHoareTripleChecker+Valid, 63485 SdHoareTripleChecker+Invalid, 18014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 16808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time
[2023-11-29 00:01:35,760 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50350 Valid, 63485 Invalid, 18014 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 16808 Invalid, 0 Unknown, 0 Unchecked, 13.9s Time]
[2023-11-29 00:01:35,782 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24944 states.
[2023-11-29 00:01:35,950 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24944 to 13417.
[2023-11-29 00:01:35,961 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13417 states, 13416 states have (on average 1.6658467501490757) internal successors, (22349), 13416 states have internal predecessors, (22349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:01:35,976 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13417 states to 13417 states and 22349 transitions.
[2023-11-29 00:01:35,976 INFO  L78                 Accepts]: Start accepts. Automaton has 13417 states and 22349 transitions. Word has length 8933
[2023-11-29 00:01:35,980 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:01:35,981 INFO  L495      AbstractCegarLoop]: Abstraction has 13417 states and 22349 transitions.
[2023-11-29 00:01:35,982 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1608.8) internal successors, (8044), 5 states have internal predecessors, (8044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:01:35,982 INFO  L276                IsEmpty]: Start isEmpty. Operand 13417 states and 22349 transitions.
[2023-11-29 00:01:36,451 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8935
[2023-11-29 00:01:36,452 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:01:36,453 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:01:36,566 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0
[2023-11-29 00:01:36,654 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:01:36,654 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:01:36,655 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:01:36,657 INFO  L85        PathProgramCache]: Analyzing trace with hash -1839658759, now seen corresponding path program 1 times
[2023-11-29 00:01:36,657 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:01:36,657 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950805150]
[2023-11-29 00:01:36,658 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:01:36,658 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:01:37,419 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:01:37,419 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782587230]
[2023-11-29 00:01:37,421 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:01:37,421 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:01:37,421 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:01:37,422 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:01:37,422 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-11-29 00:01:48,738 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:01:49,029 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44705 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:01:49,133 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:01:50,130 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 00:01:50,130 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:01:50,308 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 00:01:50,308 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:01:50,308 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950805150]
[2023-11-29 00:01:50,308 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:01:50,308 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782587230]
[2023-11-29 00:01:50,308 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782587230] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:01:50,308 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:01:50,314 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:01:50,314 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447919123]
[2023-11-29 00:01:50,315 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:01:50,320 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:01:50,320 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:01:50,325 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:01:50,325 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:01:50,327 INFO  L87              Difference]: Start difference. First operand 13417 states and 22349 transitions. Second operand  has 5 states, 5 states have (on average 1609.4) internal successors, (8047), 5 states have internal predecessors, (8047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:02:05,110 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:02:05,110 INFO  L93              Difference]: Finished difference Result 46841 states and 77621 transitions.
[2023-11-29 00:02:05,110 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:02:05,112 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1609.4) internal successors, (8047), 5 states have internal predecessors, (8047), 0 states have call successors, (0), 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 00:02:05,119 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:02:05,147 INFO  L225             Difference]: With dead ends: 46841
[2023-11-29 00:02:05,147 INFO  L226             Difference]: Without dead ends: 24945
[2023-11-29 00:02:05,161 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 00:02:05,162 INFO  L413           NwaCegarLoop]: 31847 mSDtfsCounter, 50347 mSDsluCounter, 31624 mSDsCounter, 0 mSdLazyCounter, 16808 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50347 SdHoareTripleChecker+Valid, 63471 SdHoareTripleChecker+Invalid, 18014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 16808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time
[2023-11-29 00:02:05,162 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50347 Valid, 63471 Invalid, 18014 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 16808 Invalid, 0 Unknown, 0 Unchecked, 13.9s Time]
[2023-11-29 00:02:05,190 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24945 states.
[2023-11-29 00:02:05,343 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24945 to 13419.
[2023-11-29 00:02:05,354 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13419 states, 13418 states have (on average 1.665747503353704) internal successors, (22351), 13418 states have internal predecessors, (22351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:02:05,369 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13419 states to 13419 states and 22351 transitions.
[2023-11-29 00:02:05,369 INFO  L78                 Accepts]: Start accepts. Automaton has 13419 states and 22351 transitions. Word has length 8934
[2023-11-29 00:02:05,373 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:02:05,373 INFO  L495      AbstractCegarLoop]: Abstraction has 13419 states and 22351 transitions.
[2023-11-29 00:02:05,375 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1609.4) internal successors, (8047), 5 states have internal predecessors, (8047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:02:05,375 INFO  L276                IsEmpty]: Start isEmpty. Operand 13419 states and 22351 transitions.
[2023-11-29 00:02:05,723 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8936
[2023-11-29 00:02:05,723 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:02:05,725 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 00:02:05,837 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0
[2023-11-29 00:02:05,925 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10
[2023-11-29 00:02:05,925 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:02:05,926 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:02:05,928 INFO  L85        PathProgramCache]: Analyzing trace with hash -1668986841, now seen corresponding path program 1 times
[2023-11-29 00:02:05,928 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:02:05,928 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199661749]
[2023-11-29 00:02:05,930 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:02:05,930 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:02:06,790 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:02:06,790 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241957898]
[2023-11-29 00:02:06,792 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:02:06,792 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:02:06,793 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:02:06,793 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:02:06,794 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-11-29 00:02:18,211 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:02:18,503 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44709 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:02:18,607 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:02:19,607 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 00:02:19,607 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:02:19,774 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 00:02:19,775 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:02:19,775 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199661749]
[2023-11-29 00:02:19,775 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:02:19,775 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241957898]
[2023-11-29 00:02:19,775 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [241957898] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:02:19,775 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:02:19,781 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:02:19,781 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450606767]
[2023-11-29 00:02:19,781 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:02:19,786 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:02:19,786 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:02:19,790 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:02:19,790 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:02:19,792 INFO  L87              Difference]: Start difference. First operand 13419 states and 22351 transitions. Second operand  has 5 states, 5 states have (on average 1610.0) internal successors, (8050), 5 states have internal predecessors, (8050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:02:34,579 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:02:34,580 INFO  L93              Difference]: Finished difference Result 46849 states and 77629 transitions.
[2023-11-29 00:02:34,580 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:02:34,582 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1610.0) internal successors, (8050), 5 states have internal predecessors, (8050), 0 states have call successors, (0), 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 00:02:34,588 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:02:34,617 INFO  L225             Difference]: With dead ends: 46849
[2023-11-29 00:02:34,617 INFO  L226             Difference]: Without dead ends: 24946
[2023-11-29 00:02:34,632 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 00:02:34,632 INFO  L413           NwaCegarLoop]: 31839 mSDtfsCounter, 50339 mSDsluCounter, 31619 mSDsCounter, 0 mSdLazyCounter, 16808 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50339 SdHoareTripleChecker+Valid, 63458 SdHoareTripleChecker+Invalid, 18014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 16808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time
[2023-11-29 00:02:34,633 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50339 Valid, 63458 Invalid, 18014 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 16808 Invalid, 0 Unknown, 0 Unchecked, 14.0s Time]
[2023-11-29 00:02:34,661 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24946 states.
[2023-11-29 00:02:34,836 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24946 to 13421.
[2023-11-29 00:02:34,849 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13421 states, 13420 states have (on average 1.6656482861400894) internal successors, (22353), 13420 states have internal predecessors, (22353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:02:34,867 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13421 states to 13421 states and 22353 transitions.
[2023-11-29 00:02:34,867 INFO  L78                 Accepts]: Start accepts. Automaton has 13421 states and 22353 transitions. Word has length 8935
[2023-11-29 00:02:34,871 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:02:34,872 INFO  L495      AbstractCegarLoop]: Abstraction has 13421 states and 22353 transitions.
[2023-11-29 00:02:34,874 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1610.0) internal successors, (8050), 5 states have internal predecessors, (8050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:02:34,874 INFO  L276                IsEmpty]: Start isEmpty. Operand 13421 states and 22353 transitions.
[2023-11-29 00:02:35,386 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8937
[2023-11-29 00:02:35,387 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:02:35,390 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 00:02:35,524 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0
[2023-11-29 00:02:35,590 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:02:35,591 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:02:35,593 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:02:35,594 INFO  L85        PathProgramCache]: Analyzing trace with hash 1001783457, now seen corresponding path program 1 times
[2023-11-29 00:02:35,594 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:02:35,594 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062889822]
[2023-11-29 00:02:35,595 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:02:35,595 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:02:36,393 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:02:36,393 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1641068592]
[2023-11-29 00:02:36,394 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:02:36,395 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:02:36,395 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:02:36,395 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:02:36,397 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2023-11-29 00:02:48,274 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:02:48,564 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44712 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:02:48,666 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:02:49,916 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 00:02:49,916 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:02:50,081 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 00:02:50,081 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:02:50,081 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062889822]
[2023-11-29 00:02:50,081 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:02:50,081 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641068592]
[2023-11-29 00:02:50,081 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641068592] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:02:50,081 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:02:50,087 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:02:50,087 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791439842]
[2023-11-29 00:02:50,087 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:02:50,091 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:02:50,091 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:02:50,095 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:02:50,096 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:02:50,097 INFO  L87              Difference]: Start difference. First operand 13421 states and 22353 transitions. Second operand  has 5 states, 5 states have (on average 1610.6) internal successors, (8053), 5 states have internal predecessors, (8053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:03:04,860 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:03:04,860 INFO  L93              Difference]: Finished difference Result 46857 states and 77637 transitions.
[2023-11-29 00:03:04,860 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:03:04,862 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1610.6) internal successors, (8053), 5 states have internal predecessors, (8053), 0 states have call successors, (0), 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 00:03:04,867 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:03:04,883 INFO  L225             Difference]: With dead ends: 46857
[2023-11-29 00:03:04,884 INFO  L226             Difference]: Without dead ends: 24947
[2023-11-29 00:03:04,890 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17871 GetRequests, 17862 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 00:03:04,891 INFO  L413           NwaCegarLoop]: 31831 mSDtfsCounter, 50331 mSDsluCounter, 31614 mSDsCounter, 0 mSdLazyCounter, 16808 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50331 SdHoareTripleChecker+Valid, 63445 SdHoareTripleChecker+Invalid, 18014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 16808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time
[2023-11-29 00:03:04,891 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50331 Valid, 63445 Invalid, 18014 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 16808 Invalid, 0 Unknown, 0 Unchecked, 14.0s Time]
[2023-11-29 00:03:04,910 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24947 states.
[2023-11-29 00:03:05,037 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24947 to 13423.
[2023-11-29 00:03:05,048 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13423 states, 13422 states have (on average 1.665549098495008) internal successors, (22355), 13422 states have internal predecessors, (22355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:03:05,063 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13423 states to 13423 states and 22355 transitions.
[2023-11-29 00:03:05,063 INFO  L78                 Accepts]: Start accepts. Automaton has 13423 states and 22355 transitions. Word has length 8936
[2023-11-29 00:03:05,068 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:03:05,068 INFO  L495      AbstractCegarLoop]: Abstraction has 13423 states and 22355 transitions.
[2023-11-29 00:03:05,069 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1610.6) internal successors, (8053), 5 states have internal predecessors, (8053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:03:05,069 INFO  L276                IsEmpty]: Start isEmpty. Operand 13423 states and 22355 transitions.
[2023-11-29 00:03:05,386 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8938
[2023-11-29 00:03:05,386 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:03:05,388 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 00:03:05,507 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0
[2023-11-29 00:03:05,588 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12
[2023-11-29 00:03:05,588 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:03:05,589 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:03:05,591 INFO  L85        PathProgramCache]: Analyzing trace with hash 1835722113, now seen corresponding path program 1 times
[2023-11-29 00:03:05,591 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:03:05,592 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243023767]
[2023-11-29 00:03:05,592 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:03:05,592 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:03:06,392 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:03:06,393 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643434586]
[2023-11-29 00:03:06,394 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:03:06,394 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:03:06,394 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:03:06,395 INFO  L229       MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:03:06,396 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2023-11-29 00:03:17,592 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:03:17,873 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44715 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:03:17,972 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:03:19,122 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 00:03:19,122 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:03:19,278 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 00:03:19,278 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:03:19,278 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243023767]
[2023-11-29 00:03:19,278 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:03:19,279 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643434586]
[2023-11-29 00:03:19,279 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643434586] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:03:19,279 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:03:19,283 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:03:19,283 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505343724]
[2023-11-29 00:03:19,283 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:03:19,287 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:03:19,287 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:03:19,291 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:03:19,291 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:03:19,293 INFO  L87              Difference]: Start difference. First operand 13423 states and 22355 transitions. Second operand  has 5 states, 5 states have (on average 1611.2) internal successors, (8056), 5 states have internal predecessors, (8056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:03:33,968 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:03:33,968 INFO  L93              Difference]: Finished difference Result 46865 states and 77645 transitions.
[2023-11-29 00:03:33,968 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:03:33,970 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1611.2) internal successors, (8056), 5 states have internal predecessors, (8056), 0 states have call successors, (0), 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 00:03:33,976 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:03:33,992 INFO  L225             Difference]: With dead ends: 46865
[2023-11-29 00:03:33,992 INFO  L226             Difference]: Without dead ends: 24948
[2023-11-29 00:03:34,000 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17873 GetRequests, 17864 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 00:03:34,001 INFO  L413           NwaCegarLoop]: 31823 mSDtfsCounter, 50323 mSDsluCounter, 31609 mSDsCounter, 0 mSdLazyCounter, 16808 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50323 SdHoareTripleChecker+Valid, 63432 SdHoareTripleChecker+Invalid, 18014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 16808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time
[2023-11-29 00:03:34,001 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50323 Valid, 63432 Invalid, 18014 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 16808 Invalid, 0 Unknown, 0 Unchecked, 13.7s Time]
[2023-11-29 00:03:34,023 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24948 states.
[2023-11-29 00:03:34,142 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24948 to 13425.
[2023-11-29 00:03:34,154 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13425 states, 13424 states have (on average 1.6654499404052443) internal successors, (22357), 13424 states have internal predecessors, (22357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:03:34,168 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13425 states to 13425 states and 22357 transitions.
[2023-11-29 00:03:34,168 INFO  L78                 Accepts]: Start accepts. Automaton has 13425 states and 22357 transitions. Word has length 8937
[2023-11-29 00:03:34,173 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:03:34,173 INFO  L495      AbstractCegarLoop]: Abstraction has 13425 states and 22357 transitions.
[2023-11-29 00:03:34,174 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1611.2) internal successors, (8056), 5 states have internal predecessors, (8056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:03:34,174 INFO  L276                IsEmpty]: Start isEmpty. Operand 13425 states and 22357 transitions.
[2023-11-29 00:03:34,490 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8939
[2023-11-29 00:03:34,490 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:03:34,492 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 00:03:34,605 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0
[2023-11-29 00:03:34,693 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:03:34,693 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:03:34,693 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:03:34,695 INFO  L85        PathProgramCache]: Analyzing trace with hash 761077831, now seen corresponding path program 1 times
[2023-11-29 00:03:34,695 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:03:34,695 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632364934]
[2023-11-29 00:03:34,696 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:03:34,696 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:03:35,592 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:03:35,592 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1707012121]
[2023-11-29 00:03:35,595 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:03:35,595 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:03:35,595 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:03:35,596 INFO  L229       MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:03:35,599 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2023-11-29 00:03:47,110 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:03:47,399 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44718 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:03:47,504 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:03:48,497 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 00:03:48,497 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:03:48,654 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 00:03:48,654 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:03:48,654 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632364934]
[2023-11-29 00:03:48,654 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:03:48,654 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707012121]
[2023-11-29 00:03:48,654 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707012121] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:03:48,654 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:03:48,659 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:03:48,659 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959442858]
[2023-11-29 00:03:48,659 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:03:48,664 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:03:48,664 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:03:48,668 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:03:48,668 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:03:48,670 INFO  L87              Difference]: Start difference. First operand 13425 states and 22357 transitions. Second operand  has 5 states, 5 states have (on average 1611.8) internal successors, (8059), 5 states have internal predecessors, (8059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:04:04,825 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:04:04,825 INFO  L93              Difference]: Finished difference Result 46873 states and 77653 transitions.
[2023-11-29 00:04:04,825 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:04:04,827 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1611.8) internal successors, (8059), 5 states have internal predecessors, (8059), 0 states have call successors, (0), 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 00:04:04,833 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:04:04,852 INFO  L225             Difference]: With dead ends: 46873
[2023-11-29 00:04:04,853 INFO  L226             Difference]: Without dead ends: 24949
[2023-11-29 00:04:04,865 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17875 GetRequests, 17866 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 00:04:04,865 INFO  L413           NwaCegarLoop]: 31815 mSDtfsCounter, 34753 mSDsluCounter, 45957 mSDsCounter, 0 mSdLazyCounter, 21636 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34753 SdHoareTripleChecker+Valid, 77772 SdHoareTripleChecker+Invalid, 22842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 21636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time
[2023-11-29 00:04:04,865 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34753 Valid, 77772 Invalid, 22842 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 21636 Invalid, 0 Unknown, 0 Unchecked, 15.4s Time]
[2023-11-29 00:04:04,888 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24949 states.
[2023-11-29 00:04:05,030 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24949 to 13427.
[2023-11-29 00:04:05,042 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13427 states, 13426 states have (on average 1.6653508118575897) internal successors, (22359), 13426 states have internal predecessors, (22359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:04:05,057 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13427 states to 13427 states and 22359 transitions.
[2023-11-29 00:04:05,057 INFO  L78                 Accepts]: Start accepts. Automaton has 13427 states and 22359 transitions. Word has length 8938
[2023-11-29 00:04:05,061 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:04:05,061 INFO  L495      AbstractCegarLoop]: Abstraction has 13427 states and 22359 transitions.
[2023-11-29 00:04:05,063 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1611.8) internal successors, (8059), 5 states have internal predecessors, (8059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:04:05,063 INFO  L276                IsEmpty]: Start isEmpty. Operand 13427 states and 22359 transitions.
[2023-11-29 00:04:05,455 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8940
[2023-11-29 00:04:05,455 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:04:05,457 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 00:04:05,572 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0
[2023-11-29 00:04:05,657 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:04:05,657 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:04:05,659 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:04:05,660 INFO  L85        PathProgramCache]: Analyzing trace with hash -1081083939, now seen corresponding path program 1 times
[2023-11-29 00:04:05,660 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:04:05,660 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37177563]
[2023-11-29 00:04:05,661 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:04:05,661 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:04:06,447 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:04:06,448 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184577749]
[2023-11-29 00:04:06,449 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:04:06,449 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:04:06,450 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:04:06,450 INFO  L229       MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:04:06,451 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2023-11-29 00:04:17,642 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:04:17,924 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44722 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:04:18,026 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:04:18,979 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 00:04:18,980 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:04:19,159 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 00:04:19,159 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:04:19,159 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37177563]
[2023-11-29 00:04:19,159 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:04:19,160 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184577749]
[2023-11-29 00:04:19,160 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [184577749] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:04:19,160 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:04:19,164 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:04:19,164 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51247940]
[2023-11-29 00:04:19,164 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:04:19,170 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:04:19,171 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:04:19,177 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:04:19,177 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:04:19,179 INFO  L87              Difference]: Start difference. First operand 13427 states and 22359 transitions. Second operand  has 5 states, 5 states have (on average 1612.4) internal successors, (8062), 5 states have internal predecessors, (8062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:04:33,753 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:04:33,753 INFO  L93              Difference]: Finished difference Result 46881 states and 77661 transitions.
[2023-11-29 00:04:33,753 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:04:33,755 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1612.4) internal successors, (8062), 5 states have internal predecessors, (8062), 0 states have call successors, (0), 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 00:04:33,761 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:04:33,780 INFO  L225             Difference]: With dead ends: 46881
[2023-11-29 00:04:33,780 INFO  L226             Difference]: Without dead ends: 24950
[2023-11-29 00:04:33,791 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17877 GetRequests, 17868 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 00:04:33,792 INFO  L413           NwaCegarLoop]: 31807 mSDtfsCounter, 50307 mSDsluCounter, 31599 mSDsCounter, 0 mSdLazyCounter, 16808 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50307 SdHoareTripleChecker+Valid, 63406 SdHoareTripleChecker+Invalid, 18014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 16808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time
[2023-11-29 00:04:33,792 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50307 Valid, 63406 Invalid, 18014 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 16808 Invalid, 0 Unknown, 0 Unchecked, 13.7s Time]
[2023-11-29 00:04:33,815 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24950 states.
[2023-11-29 00:04:33,948 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24950 to 13429.
[2023-11-29 00:04:33,960 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13429 states, 13428 states have (on average 1.6652517128388442) internal successors, (22361), 13428 states have internal predecessors, (22361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:04:33,976 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13429 states to 13429 states and 22361 transitions.
[2023-11-29 00:04:33,976 INFO  L78                 Accepts]: Start accepts. Automaton has 13429 states and 22361 transitions. Word has length 8939
[2023-11-29 00:04:33,981 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:04:33,981 INFO  L495      AbstractCegarLoop]: Abstraction has 13429 states and 22361 transitions.
[2023-11-29 00:04:33,982 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1612.4) internal successors, (8062), 5 states have internal predecessors, (8062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:04:33,982 INFO  L276                IsEmpty]: Start isEmpty. Operand 13429 states and 22361 transitions.
[2023-11-29 00:04:34,304 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8941
[2023-11-29 00:04:34,304 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:04:34,307 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 00:04:34,424 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0
[2023-11-29 00:04:34,507 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2023-11-29 00:04:34,508 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:04:34,508 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:04:34,509 INFO  L85        PathProgramCache]: Analyzing trace with hash -1707505425, now seen corresponding path program 1 times
[2023-11-29 00:04:34,509 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:04:34,509 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711410332]
[2023-11-29 00:04:34,510 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:04:34,510 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:04:35,398 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:04:35,398 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136775936]
[2023-11-29 00:04:35,400 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:04:35,400 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:04:35,400 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:04:35,401 INFO  L229       MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:04:35,401 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2023-11-29 00:04:47,126 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:04:47,415 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44725 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:04:47,516 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:04:48,500 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 00:04:48,500 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:04:48,674 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 00:04:48,674 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:04:48,674 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711410332]
[2023-11-29 00:04:48,674 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:04:48,674 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136775936]
[2023-11-29 00:04:48,674 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [136775936] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:04:48,674 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:04:48,678 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:04:48,679 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707028626]
[2023-11-29 00:04:48,679 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:04:48,683 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:04:48,683 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:04:48,686 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:04:48,687 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:04:48,689 INFO  L87              Difference]: Start difference. First operand 13429 states and 22361 transitions. Second operand  has 5 states, 5 states have (on average 1613.0) internal successors, (8065), 5 states have internal predecessors, (8065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:05:05,010 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:05:05,010 INFO  L93              Difference]: Finished difference Result 46889 states and 77669 transitions.
[2023-11-29 00:05:05,011 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:05:05,012 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1613.0) internal successors, (8065), 5 states have internal predecessors, (8065), 0 states have call successors, (0), 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 00:05:05,018 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:05:05,035 INFO  L225             Difference]: With dead ends: 46889
[2023-11-29 00:05:05,035 INFO  L226             Difference]: Without dead ends: 24951
[2023-11-29 00:05:05,043 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17879 GetRequests, 17870 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 00:05:05,044 INFO  L413           NwaCegarLoop]: 31799 mSDtfsCounter, 34743 mSDsluCounter, 45941 mSDsCounter, 0 mSdLazyCounter, 21636 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34743 SdHoareTripleChecker+Valid, 77740 SdHoareTripleChecker+Invalid, 22842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 21636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time
[2023-11-29 00:05:05,044 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34743 Valid, 77740 Invalid, 22842 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 21636 Invalid, 0 Unknown, 0 Unchecked, 15.4s Time]
[2023-11-29 00:05:05,064 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24951 states.
[2023-11-29 00:05:05,181 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24951 to 13431.
[2023-11-29 00:05:05,193 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13431 states, 13430 states have (on average 1.6651526433358153) internal successors, (22363), 13430 states have internal predecessors, (22363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:05:05,208 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13431 states to 13431 states and 22363 transitions.
[2023-11-29 00:05:05,208 INFO  L78                 Accepts]: Start accepts. Automaton has 13431 states and 22363 transitions. Word has length 8940
[2023-11-29 00:05:05,212 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:05:05,212 INFO  L495      AbstractCegarLoop]: Abstraction has 13431 states and 22363 transitions.
[2023-11-29 00:05:05,214 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1613.0) internal successors, (8065), 5 states have internal predecessors, (8065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:05:05,214 INFO  L276                IsEmpty]: Start isEmpty. Operand 13431 states and 22363 transitions.
[2023-11-29 00:05:05,530 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8942
[2023-11-29 00:05:05,530 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:05:05,531 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 00:05:05,645 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0
[2023-11-29 00:05:05,732 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16
[2023-11-29 00:05:05,732 INFO  L420      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:05:05,732 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:05:05,733 INFO  L85        PathProgramCache]: Analyzing trace with hash 561664311, now seen corresponding path program 1 times
[2023-11-29 00:05:05,733 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:05:05,734 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161547966]
[2023-11-29 00:05:05,734 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:05:05,734 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:05:06,515 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:05:06,515 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [569674650]
[2023-11-29 00:05:06,517 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:05:06,517 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:05:06,517 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:05:06,518 INFO  L229       MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:05:06,519 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process
[2023-11-29 00:05:18,027 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:05:18,321 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44728 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:05:18,431 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:05:19,416 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 00:05:19,416 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:05:19,612 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 00:05:19,612 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:05:19,613 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161547966]
[2023-11-29 00:05:19,613 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:05:19,613 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569674650]
[2023-11-29 00:05:19,613 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [569674650] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:05:19,613 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:05:19,617 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:05:19,617 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967552222]
[2023-11-29 00:05:19,617 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:05:19,621 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:05:19,621 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:05:19,624 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:05:19,624 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:05:19,626 INFO  L87              Difference]: Start difference. First operand 13431 states and 22363 transitions. Second operand  has 5 states, 5 states have (on average 1613.6) internal successors, (8068), 5 states have internal predecessors, (8068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:05:34,196 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:05:34,196 INFO  L93              Difference]: Finished difference Result 46897 states and 77677 transitions.
[2023-11-29 00:05:34,196 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:05:34,198 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1613.6) internal successors, (8068), 5 states have internal predecessors, (8068), 0 states have call successors, (0), 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 00:05:34,205 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:05:34,226 INFO  L225             Difference]: With dead ends: 46897
[2023-11-29 00:05:34,226 INFO  L226             Difference]: Without dead ends: 24952
[2023-11-29 00:05:34,237 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 00:05:34,237 INFO  L413           NwaCegarLoop]: 31791 mSDtfsCounter, 50291 mSDsluCounter, 31589 mSDsCounter, 0 mSdLazyCounter, 16808 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50291 SdHoareTripleChecker+Valid, 63380 SdHoareTripleChecker+Invalid, 18014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 16808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time
[2023-11-29 00:05:34,237 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50291 Valid, 63380 Invalid, 18014 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 16808 Invalid, 0 Unknown, 0 Unchecked, 13.8s Time]
[2023-11-29 00:05:34,260 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24952 states.
[2023-11-29 00:05:34,393 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24952 to 13433.
[2023-11-29 00:05:34,405 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13433 states, 13432 states have (on average 1.6650536033353187) internal successors, (22365), 13432 states have internal predecessors, (22365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:05:34,421 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13433 states to 13433 states and 22365 transitions.
[2023-11-29 00:05:34,421 INFO  L78                 Accepts]: Start accepts. Automaton has 13433 states and 22365 transitions. Word has length 8941
[2023-11-29 00:05:34,425 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:05:34,425 INFO  L495      AbstractCegarLoop]: Abstraction has 13433 states and 22365 transitions.
[2023-11-29 00:05:34,427 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1613.6) internal successors, (8068), 5 states have internal predecessors, (8068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:05:34,427 INFO  L276                IsEmpty]: Start isEmpty. Operand 13433 states and 22365 transitions.
[2023-11-29 00:05:34,748 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8943
[2023-11-29 00:05:34,748 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:05:34,749 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 00:05:34,861 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0
[2023-11-29 00:05:34,950 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17
[2023-11-29 00:05:34,950 INFO  L420      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:05:34,950 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:05:34,951 INFO  L85        PathProgramCache]: Analyzing trace with hash -1280914283, now seen corresponding path program 1 times
[2023-11-29 00:05:34,952 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:05:34,952 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185590864]
[2023-11-29 00:05:34,952 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:05:34,953 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:05:35,743 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:05:35,744 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048692905]
[2023-11-29 00:05:35,745 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:05:35,745 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:05:35,746 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:05:35,746 INFO  L229       MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:05:35,747 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process
[2023-11-29 00:05:47,356 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:05:47,644 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44731 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 00:05:47,745 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:05:48,737 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 00:05:48,737 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:05:48,937 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 00:05:48,937 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:05:48,937 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185590864]
[2023-11-29 00:05:48,938 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:05:48,938 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048692905]
[2023-11-29 00:05:48,938 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048692905] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:05:48,938 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:05:48,944 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12
[2023-11-29 00:05:48,944 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740793251]
[2023-11-29 00:05:48,944 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:05:48,948 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-29 00:05:48,948 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:05:48,951 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-29 00:05:48,951 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132
[2023-11-29 00:05:48,954 INFO  L87              Difference]: Start difference. First operand 13433 states and 22365 transitions. Second operand  has 6 states, 6 states have (on average 1345.1666666666667) internal successors, (8071), 6 states have internal predecessors, (8071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:06:15,785 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:06:15,785 INFO  L93              Difference]: Finished difference Result 58501 states and 96989 transitions.
[2023-11-29 00:06:15,786 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-11-29 00:06:15,787 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 1345.1666666666667) internal successors, (8071), 6 states have internal predecessors, (8071), 0 states have call successors, (0), 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 00:06:15,794 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:06:15,820 INFO  L225             Difference]: With dead ends: 58501
[2023-11-29 00:06:15,820 INFO  L226             Difference]: Without dead ends: 36549
[2023-11-29 00:06:15,834 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17884 GetRequests, 17872 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 00:06:15,834 INFO  L413           NwaCegarLoop]: 31785 mSDtfsCounter, 85046 mSDsluCounter, 76907 mSDsCounter, 0 mSdLazyCounter, 35796 mSolverCounterSat, 1209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85046 SdHoareTripleChecker+Valid, 108692 SdHoareTripleChecker+Invalid, 37005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 1209 IncrementalHoareTripleChecker+Valid, 35796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.5s IncrementalHoareTripleChecker+Time
[2023-11-29 00:06:15,834 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [85046 Valid, 108692 Invalid, 37005 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [1209 Valid, 35796 Invalid, 0 Unknown, 0 Unchecked, 25.5s Time]
[2023-11-29 00:06:15,864 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 36549 states.
[2023-11-29 00:06:16,026 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 36549 to 13435.
[2023-11-29 00:06:16,037 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13435 states, 13434 states have (on average 1.6649545928241776) internal successors, (22367), 13434 states have internal predecessors, (22367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:06:16,053 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13435 states to 13435 states and 22367 transitions.
[2023-11-29 00:06:16,054 INFO  L78                 Accepts]: Start accepts. Automaton has 13435 states and 22367 transitions. Word has length 8942
[2023-11-29 00:06:16,058 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:06:16,058 INFO  L495      AbstractCegarLoop]: Abstraction has 13435 states and 22367 transitions.
[2023-11-29 00:06:16,059 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 1345.1666666666667) internal successors, (8071), 6 states have internal predecessors, (8071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:06:16,059 INFO  L276                IsEmpty]: Start isEmpty. Operand 13435 states and 22367 transitions.
[2023-11-29 00:06:16,466 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8944
[2023-11-29 00:06:16,466 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:06:16,468 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 00:06:16,581 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0
[2023-11-29 00:06:16,668 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:06:16,668 INFO  L420      AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:06:16,669 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:06:16,670 INFO  L85        PathProgramCache]: Analyzing trace with hash -554570605, now seen corresponding path program 1 times
[2023-11-29 00:06:16,670 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:06:16,671 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411050130]
[2023-11-29 00:06:16,671 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:06:16,671 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:06:17,463 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:06:17,463 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1504595338]
[2023-11-29 00:06:17,465 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:06:17,465 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:06:17,465 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:06:17,466 INFO  L229       MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:06:17,467 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process
[2023-11-29 00:06:28,685 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:06:28,965 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44735 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:06:29,062 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:06:30,005 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 00:06:30,005 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:06:30,174 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 00:06:30,174 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:06:30,174 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411050130]
[2023-11-29 00:06:30,174 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:06:30,175 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504595338]
[2023-11-29 00:06:30,175 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504595338] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:06:30,175 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:06:30,179 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:06:30,179 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508725566]
[2023-11-29 00:06:30,179 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:06:30,183 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:06:30,183 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:06:30,186 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:06:30,186 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:06:30,187 INFO  L87              Difference]: Start difference. First operand 13435 states and 22367 transitions. Second operand  has 5 states, 5 states have (on average 1614.8) internal successors, (8074), 5 states have internal predecessors, (8074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:06:44,674 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:06:44,674 INFO  L93              Difference]: Finished difference Result 46913 states and 77693 transitions.
[2023-11-29 00:06:44,674 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:06:44,676 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1614.8) internal successors, (8074), 5 states have internal predecessors, (8074), 0 states have call successors, (0), 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 00:06:44,682 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:06:44,700 INFO  L225             Difference]: With dead ends: 46913
[2023-11-29 00:06:44,700 INFO  L226             Difference]: Without dead ends: 24954
[2023-11-29 00:06:44,710 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17885 GetRequests, 17876 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 00:06:44,711 INFO  L413           NwaCegarLoop]: 31775 mSDtfsCounter, 50260 mSDsluCounter, 31580 mSDsCounter, 0 mSdLazyCounter, 16808 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50260 SdHoareTripleChecker+Valid, 63355 SdHoareTripleChecker+Invalid, 18014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 16808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time
[2023-11-29 00:06:44,711 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50260 Valid, 63355 Invalid, 18014 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 16808 Invalid, 0 Unknown, 0 Unchecked, 13.7s Time]
[2023-11-29 00:06:44,733 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24954 states.
[2023-11-29 00:06:44,860 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24954 to 13437.
[2023-11-29 00:06:44,872 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13437 states, 13436 states have (on average 1.664855611789223) internal successors, (22369), 13436 states have internal predecessors, (22369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:06:44,888 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13437 states to 13437 states and 22369 transitions.
[2023-11-29 00:06:44,888 INFO  L78                 Accepts]: Start accepts. Automaton has 13437 states and 22369 transitions. Word has length 8943
[2023-11-29 00:06:44,893 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:06:44,893 INFO  L495      AbstractCegarLoop]: Abstraction has 13437 states and 22369 transitions.
[2023-11-29 00:06:44,894 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1614.8) internal successors, (8074), 5 states have internal predecessors, (8074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:06:44,894 INFO  L276                IsEmpty]: Start isEmpty. Operand 13437 states and 22369 transitions.
[2023-11-29 00:06:45,212 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8945
[2023-11-29 00:06:45,212 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:06:45,214 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 00:06:45,331 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0
[2023-11-29 00:06:45,414 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19
[2023-11-29 00:06:45,414 INFO  L420      AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:06:45,415 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:06:45,417 INFO  L85        PathProgramCache]: Analyzing trace with hash -1832737219, now seen corresponding path program 1 times
[2023-11-29 00:06:45,417 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:06:45,417 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113321290]
[2023-11-29 00:06:45,418 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:06:45,418 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:06:46,217 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:06:46,218 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [569786547]
[2023-11-29 00:06:46,219 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:06:46,219 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:06:46,220 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:06:46,220 INFO  L229       MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:06:46,221 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process
[2023-11-29 00:06:57,867 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:06:58,159 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44738 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:06:58,260 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:06:59,240 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 00:06:59,240 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:06:59,429 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 00:06:59,429 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:06:59,429 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113321290]
[2023-11-29 00:06:59,429 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:06:59,429 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569786547]
[2023-11-29 00:06:59,429 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [569786547] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:06:59,429 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:06:59,435 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:06:59,435 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370554248]
[2023-11-29 00:06:59,435 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:06:59,439 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:06:59,439 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:06:59,442 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:06:59,443 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:06:59,445 INFO  L87              Difference]: Start difference. First operand 13437 states and 22369 transitions. Second operand  has 5 states, 5 states have (on average 1615.4) internal successors, (8077), 5 states have internal predecessors, (8077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:07:14,132 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:07:14,132 INFO  L93              Difference]: Finished difference Result 46921 states and 77701 transitions.
[2023-11-29 00:07:14,132 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:07:14,134 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1615.4) internal successors, (8077), 5 states have internal predecessors, (8077), 0 states have call successors, (0), 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 00:07:14,140 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:07:14,157 INFO  L225             Difference]: With dead ends: 46921
[2023-11-29 00:07:14,157 INFO  L226             Difference]: Without dead ends: 24955
[2023-11-29 00:07:14,166 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17887 GetRequests, 17878 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 00:07:14,166 INFO  L413           NwaCegarLoop]: 31767 mSDtfsCounter, 50251 mSDsluCounter, 31575 mSDsCounter, 0 mSdLazyCounter, 16808 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50251 SdHoareTripleChecker+Valid, 63342 SdHoareTripleChecker+Invalid, 18014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 16808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time
[2023-11-29 00:07:14,167 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50251 Valid, 63342 Invalid, 18014 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 16808 Invalid, 0 Unknown, 0 Unchecked, 13.9s Time]
[2023-11-29 00:07:14,189 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24955 states.
[2023-11-29 00:07:14,312 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24955 to 13439.
[2023-11-29 00:07:14,323 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13439 states, 13438 states have (on average 1.6647566602172943) internal successors, (22371), 13438 states have internal predecessors, (22371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:07:14,338 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13439 states to 13439 states and 22371 transitions.
[2023-11-29 00:07:14,339 INFO  L78                 Accepts]: Start accepts. Automaton has 13439 states and 22371 transitions. Word has length 8944
[2023-11-29 00:07:14,343 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:07:14,343 INFO  L495      AbstractCegarLoop]: Abstraction has 13439 states and 22371 transitions.
[2023-11-29 00:07:14,344 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1615.4) internal successors, (8077), 5 states have internal predecessors, (8077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:07:14,344 INFO  L276                IsEmpty]: Start isEmpty. Operand 13439 states and 22371 transitions.
[2023-11-29 00:07:14,661 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8946
[2023-11-29 00:07:14,661 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:07:14,663 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 00:07:14,776 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0
[2023-11-29 00:07:14,863 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20
[2023-11-29 00:07:14,864 INFO  L420      AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:07:14,864 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:07:14,865 INFO  L85        PathProgramCache]: Analyzing trace with hash 1903526381, now seen corresponding path program 1 times
[2023-11-29 00:07:14,866 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:07:14,866 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531142387]
[2023-11-29 00:07:14,866 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:07:14,866 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:07:15,648 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:07:15,649 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [232194467]
[2023-11-29 00:07:15,650 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:07:15,650 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:07:15,650 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:07:15,651 INFO  L229       MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:07:15,653 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process
[2023-11-29 00:07:27,217 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:07:27,510 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44741 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:07:27,628 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:07:28,575 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 00:07:28,575 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:07:28,753 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 00:07:28,753 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:07:28,753 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531142387]
[2023-11-29 00:07:28,753 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:07:28,753 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232194467]
[2023-11-29 00:07:28,754 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [232194467] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:07:28,754 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:07:28,758 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:07:28,758 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358414537]
[2023-11-29 00:07:28,758 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:07:28,762 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:07:28,762 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:07:28,765 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:07:28,765 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:07:28,767 INFO  L87              Difference]: Start difference. First operand 13439 states and 22371 transitions. Second operand  has 5 states, 5 states have (on average 1616.0) internal successors, (8080), 5 states have internal predecessors, (8080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:07:43,252 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:07:43,252 INFO  L93              Difference]: Finished difference Result 46929 states and 77709 transitions.
[2023-11-29 00:07:43,252 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:07:43,254 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1616.0) internal successors, (8080), 5 states have internal predecessors, (8080), 0 states have call successors, (0), 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 00:07:43,260 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:07:43,281 INFO  L225             Difference]: With dead ends: 46929
[2023-11-29 00:07:43,281 INFO  L226             Difference]: Without dead ends: 24956
[2023-11-29 00:07:43,293 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17889 GetRequests, 17880 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 00:07:43,294 INFO  L413           NwaCegarLoop]: 31759 mSDtfsCounter, 50259 mSDsluCounter, 31569 mSDsCounter, 0 mSdLazyCounter, 16808 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50259 SdHoareTripleChecker+Valid, 63328 SdHoareTripleChecker+Invalid, 18014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 16808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time
[2023-11-29 00:07:43,294 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50259 Valid, 63328 Invalid, 18014 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 16808 Invalid, 0 Unknown, 0 Unchecked, 13.7s Time]
[2023-11-29 00:07:43,317 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24956 states.
[2023-11-29 00:07:43,449 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24956 to 13441.
[2023-11-29 00:07:43,461 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13441 states, 13440 states have (on average 1.664657738095238) internal successors, (22373), 13440 states have internal predecessors, (22373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:07:43,477 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13441 states to 13441 states and 22373 transitions.
[2023-11-29 00:07:43,477 INFO  L78                 Accepts]: Start accepts. Automaton has 13441 states and 22373 transitions. Word has length 8945
[2023-11-29 00:07:43,482 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:07:43,482 INFO  L495      AbstractCegarLoop]: Abstraction has 13441 states and 22373 transitions.
[2023-11-29 00:07:43,483 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1616.0) internal successors, (8080), 5 states have internal predecessors, (8080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:07:43,483 INFO  L276                IsEmpty]: Start isEmpty. Operand 13441 states and 22373 transitions.
[2023-11-29 00:07:43,801 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8947
[2023-11-29 00:07:43,801 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:07:43,802 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 00:07:43,915 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0
[2023-11-29 00:07:44,003 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21
[2023-11-29 00:07:44,003 INFO  L420      AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:07:44,004 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:07:44,005 INFO  L85        PathProgramCache]: Analyzing trace with hash -1797157405, now seen corresponding path program 1 times
[2023-11-29 00:07:44,005 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:07:44,005 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402968610]
[2023-11-29 00:07:44,006 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:07:44,006 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:07:44,798 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:07:44,798 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [583440119]
[2023-11-29 00:07:44,800 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:07:44,800 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:07:44,800 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:07:44,801 INFO  L229       MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:07:44,802 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process
[2023-11-29 00:07:56,618 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:07:56,904 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44744 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:07:57,007 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:07:58,188 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 00:07:58,188 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:07:58,374 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 00:07:58,374 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:07:58,374 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402968610]
[2023-11-29 00:07:58,374 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:07:58,374 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583440119]
[2023-11-29 00:07:58,374 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [583440119] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:07:58,374 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:07:58,379 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:07:58,379 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713092305]
[2023-11-29 00:07:58,379 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:07:58,383 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:07:58,384 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:07:58,387 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:07:58,387 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:07:58,389 INFO  L87              Difference]: Start difference. First operand 13441 states and 22373 transitions. Second operand  has 5 states, 5 states have (on average 1616.6) internal successors, (8083), 5 states have internal predecessors, (8083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:08:13,220 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:08:13,221 INFO  L93              Difference]: Finished difference Result 46937 states and 77717 transitions.
[2023-11-29 00:08:13,221 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:08:13,222 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1616.6) internal successors, (8083), 5 states have internal predecessors, (8083), 0 states have call successors, (0), 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 8946
[2023-11-29 00:08:13,228 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:08:13,241 INFO  L225             Difference]: With dead ends: 46937
[2023-11-29 00:08:13,241 INFO  L226             Difference]: Without dead ends: 24957
[2023-11-29 00:08:13,246 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17891 GetRequests, 17882 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 00:08:13,247 INFO  L413           NwaCegarLoop]: 31751 mSDtfsCounter, 50233 mSDsluCounter, 31565 mSDsCounter, 0 mSdLazyCounter, 16808 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50233 SdHoareTripleChecker+Valid, 63316 SdHoareTripleChecker+Invalid, 18014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 16808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time
[2023-11-29 00:08:13,247 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50233 Valid, 63316 Invalid, 18014 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 16808 Invalid, 0 Unknown, 0 Unchecked, 14.0s Time]
[2023-11-29 00:08:13,265 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24957 states.
[2023-11-29 00:08:13,386 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24957 to 13443.
[2023-11-29 00:08:13,397 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13443 states, 13442 states have (on average 1.6645588454099092) internal successors, (22375), 13442 states have internal predecessors, (22375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:08:13,413 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13443 states to 13443 states and 22375 transitions.
[2023-11-29 00:08:13,413 INFO  L78                 Accepts]: Start accepts. Automaton has 13443 states and 22375 transitions. Word has length 8946
[2023-11-29 00:08:13,417 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:08:13,417 INFO  L495      AbstractCegarLoop]: Abstraction has 13443 states and 22375 transitions.
[2023-11-29 00:08:13,419 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1616.6) internal successors, (8083), 5 states have internal predecessors, (8083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:08:13,419 INFO  L276                IsEmpty]: Start isEmpty. Operand 13443 states and 22375 transitions.
[2023-11-29 00:08:13,735 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8948
[2023-11-29 00:08:13,735 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:08:13,737 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, 1, 1, 1, 1, 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 00:08:13,858 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0
[2023-11-29 00:08:13,937 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22
[2023-11-29 00:08:13,938 INFO  L420      AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:08:13,938 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:08:13,941 INFO  L85        PathProgramCache]: Analyzing trace with hash 552117833, now seen corresponding path program 1 times
[2023-11-29 00:08:13,941 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:08:13,941 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872123938]
[2023-11-29 00:08:13,943 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:08:13,943 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:08:14,741 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:08:14,741 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922179235]
[2023-11-29 00:08:14,742 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:08:14,742 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:08:14,743 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:08:14,743 INFO  L229       MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:08:14,744 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process
[2023-11-29 00:08:26,611 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:08:26,894 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44748 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:08:26,991 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:08:27,984 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 00:08:27,984 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:08:28,182 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 00:08:28,182 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:08:28,182 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872123938]
[2023-11-29 00:08:28,182 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:08:28,182 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922179235]
[2023-11-29 00:08:28,183 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [922179235] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:08:28,183 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:08:28,188 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:08:28,189 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045113734]
[2023-11-29 00:08:28,189 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:08:28,192 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:08:28,193 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:08:28,196 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:08:28,196 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:08:28,198 INFO  L87              Difference]: Start difference. First operand 13443 states and 22375 transitions. Second operand  has 5 states, 5 states have (on average 1617.2) internal successors, (8086), 5 states have internal predecessors, (8086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:08:45,210 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:08:45,210 INFO  L93              Difference]: Finished difference Result 46945 states and 77725 transitions.
[2023-11-29 00:08:45,210 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:08:45,212 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1617.2) internal successors, (8086), 5 states have internal predecessors, (8086), 0 states have call successors, (0), 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 8947
[2023-11-29 00:08:45,218 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:08:45,237 INFO  L225             Difference]: With dead ends: 46945
[2023-11-29 00:08:45,237 INFO  L226             Difference]: Without dead ends: 24958
[2023-11-29 00:08:45,249 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17893 GetRequests, 17884 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 00:08:45,249 INFO  L413           NwaCegarLoop]: 31743 mSDtfsCounter, 34689 mSDsluCounter, 48097 mSDsCounter, 0 mSdLazyCounter, 22512 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34689 SdHoareTripleChecker+Valid, 79840 SdHoareTripleChecker+Invalid, 23718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 22512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time
[2023-11-29 00:08:45,250 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34689 Valid, 79840 Invalid, 23718 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 22512 Invalid, 0 Unknown, 0 Unchecked, 16.2s Time]
[2023-11-29 00:08:45,275 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24958 states.
[2023-11-29 00:08:45,396 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24958 to 13445.
[2023-11-29 00:08:45,407 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13445 states, 13444 states have (on average 1.6644599821481703) internal successors, (22377), 13444 states have internal predecessors, (22377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:08:45,422 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13445 states to 13445 states and 22377 transitions.
[2023-11-29 00:08:45,422 INFO  L78                 Accepts]: Start accepts. Automaton has 13445 states and 22377 transitions. Word has length 8947
[2023-11-29 00:08:45,426 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:08:45,426 INFO  L495      AbstractCegarLoop]: Abstraction has 13445 states and 22377 transitions.
[2023-11-29 00:08:45,428 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1617.2) internal successors, (8086), 5 states have internal predecessors, (8086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:08:45,428 INFO  L276                IsEmpty]: Start isEmpty. Operand 13445 states and 22377 transitions.
[2023-11-29 00:08:45,744 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8949
[2023-11-29 00:08:45,744 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:08:45,746 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 00:08:45,863 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0
[2023-11-29 00:08:45,946 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23
[2023-11-29 00:08:45,946 INFO  L420      AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:08:45,947 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:08:45,948 INFO  L85        PathProgramCache]: Analyzing trace with hash -398665589, now seen corresponding path program 1 times
[2023-11-29 00:08:45,948 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:08:45,948 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767110161]
[2023-11-29 00:08:45,949 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:08:45,949 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:08:46,729 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:08:46,730 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553878859]
[2023-11-29 00:08:46,731 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:08:46,731 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:08:46,731 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:08:46,732 INFO  L229       MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:08:46,733 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process
[2023-11-29 00:08:58,157 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:08:58,451 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44751 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:08:58,555 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:08:59,513 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 00:08:59,514 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:08:59,716 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 00:08:59,717 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:08:59,717 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767110161]
[2023-11-29 00:08:59,717 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:08:59,717 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553878859]
[2023-11-29 00:08:59,717 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553878859] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:08:59,717 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:08:59,722 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:08:59,722 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288965715]
[2023-11-29 00:08:59,722 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:08:59,727 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:08:59,727 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:08:59,730 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:08:59,730 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:08:59,732 INFO  L87              Difference]: Start difference. First operand 13445 states and 22377 transitions. Second operand  has 5 states, 5 states have (on average 1617.8) internal successors, (8089), 5 states have internal predecessors, (8089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:09:16,326 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:09:16,326 INFO  L93              Difference]: Finished difference Result 46953 states and 77733 transitions.
[2023-11-29 00:09:16,326 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:09:16,327 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1617.8) internal successors, (8089), 5 states have internal predecessors, (8089), 0 states have call successors, (0), 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 8948
[2023-11-29 00:09:16,334 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:09:16,352 INFO  L225             Difference]: With dead ends: 46953
[2023-11-29 00:09:16,352 INFO  L226             Difference]: Without dead ends: 24959
[2023-11-29 00:09:16,363 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17895 GetRequests, 17886 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 00:09:16,363 INFO  L413           NwaCegarLoop]: 31735 mSDtfsCounter, 34683 mSDsluCounter, 48087 mSDsCounter, 0 mSdLazyCounter, 22512 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34683 SdHoareTripleChecker+Valid, 79822 SdHoareTripleChecker+Invalid, 23718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 22512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time
[2023-11-29 00:09:16,363 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34683 Valid, 79822 Invalid, 23718 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 22512 Invalid, 0 Unknown, 0 Unchecked, 15.8s Time]
[2023-11-29 00:09:16,387 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24959 states.
[2023-11-29 00:09:16,519 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24959 to 13447.
[2023-11-29 00:09:16,531 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13447 states, 13446 states have (on average 1.6643611482968912) internal successors, (22379), 13446 states have internal predecessors, (22379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:09:16,547 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13447 states to 13447 states and 22379 transitions.
[2023-11-29 00:09:16,547 INFO  L78                 Accepts]: Start accepts. Automaton has 13447 states and 22379 transitions. Word has length 8948
[2023-11-29 00:09:16,552 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:09:16,552 INFO  L495      AbstractCegarLoop]: Abstraction has 13447 states and 22379 transitions.
[2023-11-29 00:09:16,553 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1617.8) internal successors, (8089), 5 states have internal predecessors, (8089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:09:16,553 INFO  L276                IsEmpty]: Start isEmpty. Operand 13447 states and 22379 transitions.
[2023-11-29 00:09:16,871 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8950
[2023-11-29 00:09:16,871 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:09:16,872 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 00:09:16,991 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0
[2023-11-29 00:09:17,073 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24
[2023-11-29 00:09:17,073 INFO  L420      AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:09:17,074 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:09:17,075 INFO  L85        PathProgramCache]: Analyzing trace with hash 1033500579, now seen corresponding path program 1 times
[2023-11-29 00:09:17,075 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:09:17,075 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307392406]
[2023-11-29 00:09:17,076 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:09:17,076 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:09:17,868 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:09:17,869 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2136311619]
[2023-11-29 00:09:17,870 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:09:17,870 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:09:17,870 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:09:17,871 INFO  L229       MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:09:17,872 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c14fead-b66a-4ccc-a7f9-05f01a16fe21/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process