./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.3.prop2-back-serstep.c --full-output --architecture 64bit


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


Checking for ERROR reachability
Using default analysis
Version 0e0057cc
Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/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_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.3.prop2-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/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_f45061b4-f98d-4351-a42a-062b24dba5a9/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 925e09476336dec725c16006c216b1269f27d23e9de2c213d289dbd60e5f6b99
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-11-28 20:37:10,483 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-28 20:37:10,546 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-28 20:37:10,550 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-28 20:37:10,550 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-28 20:37:10,575 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-28 20:37:10,576 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-28 20:37:10,577 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-28 20:37:10,577 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-28 20:37:10,578 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-28 20:37:10,578 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-28 20:37:10,579 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-28 20:37:10,580 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-28 20:37:10,580 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-28 20:37:10,581 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-28 20:37:10,581 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-28 20:37:10,582 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-28 20:37:10,582 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-28 20:37:10,583 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-28 20:37:10,583 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-28 20:37:10,584 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-28 20:37:10,589 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-28 20:37:10,589 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-28 20:37:10,589 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-28 20:37:10,590 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-28 20:37:10,590 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-28 20:37:10,591 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-28 20:37:10,591 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-28 20:37:10,591 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-28 20:37:10,592 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-28 20:37:10,592 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-28 20:37:10,592 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-28 20:37:10,593 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-28 20:37:10,593 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-28 20:37:10,593 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-28 20:37:10,593 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-28 20:37:10,593 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-28 20:37:10,594 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-28 20:37:10,594 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-28 20:37:10,594 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_f45061b4-f98d-4351-a42a-062b24dba5a9/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_f45061b4-f98d-4351-a42a-062b24dba5a9/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 -> 925e09476336dec725c16006c216b1269f27d23e9de2c213d289dbd60e5f6b99
[2023-11-28 20:37:10,828 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-28 20:37:10,848 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-28 20:37:10,851 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-28 20:37:10,853 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-28 20:37:10,853 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-28 20:37:10,854 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.3.prop2-back-serstep.c
[2023-11-28 20:37:13,660 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-28 20:37:14,198 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-28 20:37:14,199 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.3.prop2-back-serstep.c
[2023-11-28 20:37:14,257 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/data/59b6b516b/019cf6c9abc74c4583ea483c511a6c17/FLAGa24352302
[2023-11-28 20:37:14,272 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/data/59b6b516b/019cf6c9abc74c4583ea483c511a6c17
[2023-11-28 20:37:14,274 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-28 20:37:14,276 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-28 20:37:14,277 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-28 20:37:14,277 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-28 20:37:14,283 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-28 20:37:14,283 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:37:14" (1/1) ...
[2023-11-28 20:37:14,284 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c6fccc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:37:14, skipping insertion in model container
[2023-11-28 20:37:14,285 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:37:14" (1/1) ...
[2023-11-28 20:37:14,520 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-28 20:37:14,827 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_f45061b4-f98d-4351-a42a-062b24dba5a9/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.3.prop2-back-serstep.c[1180,1193]
[2023-11-28 20:37:16,174 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-28 20:37:16,185 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-28 20:37:16,197 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_f45061b4-f98d-4351-a42a-062b24dba5a9/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.3.prop2-back-serstep.c[1180,1193]
[2023-11-28 20:37:17,104 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-28 20:37:17,116 INFO  L206         MainTranslator]: Completed translation
[2023-11-28 20:37:17,116 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:37:17 WrapperNode
[2023-11-28 20:37:17,117 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-28 20:37:17,118 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-28 20:37:17,118 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-28 20:37:17,118 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-28 20:37:17,124 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:37:17" (1/1) ...
[2023-11-28 20:37:17,391 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:37:17" (1/1) ...
[2023-11-28 20:37:20,780 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56279
[2023-11-28 20:37:20,781 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-28 20:37:20,781 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-28 20:37:20,782 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-28 20:37:20,782 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-28 20:37:20,792 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:37:17" (1/1) ...
[2023-11-28 20:37:20,792 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:37:17" (1/1) ...
[2023-11-28 20:37:21,661 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:37:17" (1/1) ...
[2023-11-28 20:37:22,262 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 20:37:22,263 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:37:17" (1/1) ...
[2023-11-28 20:37:22,263 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:37:17" (1/1) ...
[2023-11-28 20:37:23,343 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:37:17" (1/1) ...
[2023-11-28 20:37:23,501 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:37:17" (1/1) ...
[2023-11-28 20:37:23,695 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:37:17" (1/1) ...
[2023-11-28 20:37:23,828 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:37:17" (1/1) ...
[2023-11-28 20:37:24,563 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-28 20:37:24,564 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-28 20:37:24,564 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-28 20:37:24,564 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-28 20:37:24,565 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:37:17" (1/1) ...
[2023-11-28 20:37:24,570 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-28 20:37:24,579 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:37:24,591 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2023-11-28 20:37:24,594 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2023-11-28 20:37:24,619 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-28 20:37:24,619 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-11-28 20:37:24,619 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-28 20:37:24,619 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-28 20:37:26,780 INFO  L241             CfgBuilder]: Building ICFG
[2023-11-28 20:37:26,782 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-28 20:37:51,875 INFO  L282             CfgBuilder]: Performing block encoding
[2023-11-28 20:37:52,480 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-28 20:37:52,481 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-28 20:37:52,485 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:37:52 BoogieIcfgContainer
[2023-11-28 20:37:52,485 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-28 20:37:52,487 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-28 20:37:52,488 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-28 20:37:52,491 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-28 20:37:52,491 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:37:14" (1/3) ...
[2023-11-28 20:37:52,492 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35b12366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:37:52, skipping insertion in model container
[2023-11-28 20:37:52,492 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:37:17" (2/3) ...
[2023-11-28 20:37:52,492 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35b12366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:37:52, skipping insertion in model container
[2023-11-28 20:37:52,492 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:37:52" (3/3) ...
[2023-11-28 20:37:52,493 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.pgm_protocol.3.prop2-back-serstep.c
[2023-11-28 20:37:52,507 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-28 20:37:52,507 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-28 20:37:52,674 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-28 20:37:52,680 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;@1e91cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-28 20:37:52,680 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-28 20:37:52,710 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 12145 states, 12143 states have (on average 1.6668862719262125) internal successors, (20241), 12144 states have internal predecessors, (20241), 0 states have call successors, (0), 0 states 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 20:37:52,770 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1267
[2023-11-28 20:37:52,770 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:37:52,772 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:37:52,773 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:37:52,777 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:37:52,778 INFO  L85        PathProgramCache]: Analyzing trace with hash 510523978, now seen corresponding path program 1 times
[2023-11-28 20:37:52,785 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:37:52,785 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893876371]
[2023-11-28 20:37:52,786 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:37:52,786 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:37:53,973 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:38:00,029 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 20:38:00,030 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:38:00,030 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893876371]
[2023-11-28 20:38:00,031 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893876371] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:38:00,031 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:38:00,031 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:38:00,033 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718286160]
[2023-11-28 20:38:00,033 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:38:00,040 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:38:00,041 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:38:00,070 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:38:00,071 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:38:00,100 INFO  L87              Difference]: Start difference. First operand  has 12145 states, 12143 states have (on average 1.6668862719262125) internal successors, (20241), 12144 states have internal predecessors, (20241), 0 states have call successors, (0), 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 316.5) internal successors, (1266), 4 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states 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 20:38:00,924 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:38:00,924 INFO  L93              Difference]: Finished difference Result 23761 states and 39603 transitions.
[2023-11-28 20:38:00,925 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:38:00,928 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 316.5) internal successors, (1266), 4 states have internal predecessors, (1266), 0 states have call successors, (0), 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 1266
[2023-11-28 20:38:00,938 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:38:01,015 INFO  L225             Difference]: With dead ends: 23761
[2023-11-28 20:38:01,016 INFO  L226             Difference]: Without dead ends: 12145
[2023-11-28 20:38:01,034 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 20:38:01,038 INFO  L413           NwaCegarLoop]: 20234 mSDtfsCounter, 1 mSDsluCounter, 40463 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 60697 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:38:01,039 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 60697 Invalid, 13 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 20:38:01,086 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12145 states.
[2023-11-28 20:38:01,315 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12145 to 12145.
[2023-11-28 20:38:01,344 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12145 states, 12144 states have (on average 1.6665843214756257) internal successors, (20239), 12144 states have internal predecessors, (20239), 0 states have call successors, (0), 0 states 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 20:38:01,392 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12145 states to 12145 states and 20239 transitions.
[2023-11-28 20:38:01,394 INFO  L78                 Accepts]: Start accepts. Automaton has 12145 states and 20239 transitions. Word has length 1266
[2023-11-28 20:38:01,397 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:38:01,398 INFO  L495      AbstractCegarLoop]: Abstraction has 12145 states and 20239 transitions.
[2023-11-28 20:38:01,399 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 316.5) internal successors, (1266), 4 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states 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 20:38:01,399 INFO  L276                IsEmpty]: Start isEmpty. Operand 12145 states and 20239 transitions.
[2023-11-28 20:38:01,455 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1268
[2023-11-28 20:38:01,455 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:38:01,456 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:38:01,457 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-28 20:38:01,457 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:38:01,458 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:38:01,459 INFO  L85        PathProgramCache]: Analyzing trace with hash -1351893346, now seen corresponding path program 1 times
[2023-11-28 20:38:01,459 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:38:01,459 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566944339]
[2023-11-28 20:38:01,460 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:38:01,460 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:38:02,216 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:38:04,061 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:38:04,062 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:38:04,062 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566944339]
[2023-11-28 20:38:04,062 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566944339] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:38:04,062 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:38:04,063 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:38:04,063 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396634678]
[2023-11-28 20:38:04,063 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:38:04,067 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:38:04,067 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:38:04,069 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:38:04,069 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:38:04,070 INFO  L87              Difference]: Start difference. First operand 12145 states and 20239 transitions. Second operand  has 4 states, 4 states have (on average 316.75) internal successors, (1267), 4 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states 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 20:38:04,517 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:38:04,518 INFO  L93              Difference]: Finished difference Result 23764 states and 39601 transitions.
[2023-11-28 20:38:04,518 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:38:04,519 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 316.75) internal successors, (1267), 4 states have internal predecessors, (1267), 0 states have call successors, (0), 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 1267
[2023-11-28 20:38:04,521 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:38:04,573 INFO  L225             Difference]: With dead ends: 23764
[2023-11-28 20:38:04,573 INFO  L226             Difference]: Without dead ends: 12148
[2023-11-28 20:38:04,667 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 20:38:04,669 INFO  L413           NwaCegarLoop]: 20234 mSDtfsCounter, 1 mSDsluCounter, 40461 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 60695 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:38:04,670 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 60695 Invalid, 15 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 20:38:04,694 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12148 states.
[2023-11-28 20:38:04,889 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12148 to 12147.
[2023-11-28 20:38:04,911 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12147 states, 12146 states have (on average 1.6664745595257697) internal successors, (20241), 12146 states have internal predecessors, (20241), 0 states have call successors, (0), 0 states 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 20:38:04,947 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12147 states to 12147 states and 20241 transitions.
[2023-11-28 20:38:04,947 INFO  L78                 Accepts]: Start accepts. Automaton has 12147 states and 20241 transitions. Word has length 1267
[2023-11-28 20:38:04,950 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:38:04,950 INFO  L495      AbstractCegarLoop]: Abstraction has 12147 states and 20241 transitions.
[2023-11-28 20:38:04,950 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 316.75) internal successors, (1267), 4 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states 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 20:38:04,951 INFO  L276                IsEmpty]: Start isEmpty. Operand 12147 states and 20241 transitions.
[2023-11-28 20:38:04,966 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1269
[2023-11-28 20:38:04,967 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:38:04,968 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:38:04,968 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-28 20:38:04,968 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:38:04,969 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:38:04,970 INFO  L85        PathProgramCache]: Analyzing trace with hash -1689405594, now seen corresponding path program 1 times
[2023-11-28 20:38:04,970 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:38:04,970 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520030488]
[2023-11-28 20:38:04,971 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:38:04,971 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:38:05,563 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:38:07,538 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 20:38:07,538 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:38:07,538 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520030488]
[2023-11-28 20:38:07,539 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520030488] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:38:07,539 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:38:07,539 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:38:07,540 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068029211]
[2023-11-28 20:38:07,540 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:38:07,542 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:38:07,542 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:38:07,544 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:38:07,545 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:38:07,546 INFO  L87              Difference]: Start difference. First operand 12147 states and 20241 transitions. Second operand  has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states 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 20:38:08,209 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:38:08,210 INFO  L93              Difference]: Finished difference Result 35377 states and 58952 transitions.
[2023-11-28 20:38:08,210 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-28 20:38:08,211 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 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 1268
[2023-11-28 20:38:08,213 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:38:08,262 INFO  L225             Difference]: With dead ends: 35377
[2023-11-28 20:38:08,262 INFO  L226             Difference]: Without dead ends: 23759
[2023-11-28 20:38:08,283 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-28 20:38:08,284 INFO  L413           NwaCegarLoop]: 22499 mSDtfsCounter, 19347 mSDsluCounter, 42724 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19347 SdHoareTripleChecker+Valid, 65223 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:38:08,285 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [19347 Valid, 65223 Invalid, 19 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 20:38:08,317 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23759 states.
[2023-11-28 20:38:08,581 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23759 to 12149.
[2023-11-28 20:38:08,604 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12149 states, 12148 states have (on average 1.6663648337174843) internal successors, (20243), 12148 states have internal predecessors, (20243), 0 states have call successors, (0), 0 states 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 20:38:08,624 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12149 states to 12149 states and 20243 transitions.
[2023-11-28 20:38:08,625 INFO  L78                 Accepts]: Start accepts. Automaton has 12149 states and 20243 transitions. Word has length 1268
[2023-11-28 20:38:08,627 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:38:08,627 INFO  L495      AbstractCegarLoop]: Abstraction has 12149 states and 20243 transitions.
[2023-11-28 20:38:08,628 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states 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 20:38:08,628 INFO  L276                IsEmpty]: Start isEmpty. Operand 12149 states and 20243 transitions.
[2023-11-28 20:38:08,644 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1270
[2023-11-28 20:38:08,645 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:38:08,646 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:38:08,646 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-28 20:38:08,646 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:38:08,647 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:38:08,648 INFO  L85        PathProgramCache]: Analyzing trace with hash -942664826, now seen corresponding path program 1 times
[2023-11-28 20:38:08,648 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:38:08,648 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600870713]
[2023-11-28 20:38:08,648 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:38:08,649 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:38:09,234 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:38:11,068 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 20:38:11,069 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:38:11,069 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600870713]
[2023-11-28 20:38:11,069 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600870713] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:38:11,069 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:38:11,070 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:38:11,070 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773361620]
[2023-11-28 20:38:11,070 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:38:11,072 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:38:11,072 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:38:11,074 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:38:11,074 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-28 20:38:11,075 INFO  L87              Difference]: Start difference. First operand 12149 states and 20243 transitions. Second operand  has 5 states, 5 states have (on average 253.8) internal successors, (1269), 4 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states 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 20:38:11,943 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:38:11,943 INFO  L93              Difference]: Finished difference Result 36742 states and 61223 transitions.
[2023-11-28 20:38:11,944 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:38:11,945 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 253.8) internal successors, (1269), 4 states have internal predecessors, (1269), 0 states have call successors, (0), 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 1269
[2023-11-28 20:38:11,948 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:38:11,979 INFO  L225             Difference]: With dead ends: 36742
[2023-11-28 20:38:11,980 INFO  L226             Difference]: Without dead ends: 25122
[2023-11-28 20:38:11,995 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 20:38:11,997 INFO  L413           NwaCegarLoop]: 22498 mSDtfsCounter, 79286 mSDsluCounter, 40462 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79286 SdHoareTripleChecker+Valid, 62960 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:38:11,998 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [79286 Valid, 62960 Invalid, 16 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 20:38:12,028 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25122 states.
[2023-11-28 20:38:12,275 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25122 to 13508.
[2023-11-28 20:38:12,292 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13508 states, 13507 states have (on average 1.666395202487599) internal successors, (22508), 13507 states have internal predecessors, (22508), 0 states have call successors, (0), 0 states 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 20:38:12,316 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13508 states to 13508 states and 22508 transitions.
[2023-11-28 20:38:12,316 INFO  L78                 Accepts]: Start accepts. Automaton has 13508 states and 22508 transitions. Word has length 1269
[2023-11-28 20:38:12,318 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:38:12,318 INFO  L495      AbstractCegarLoop]: Abstraction has 13508 states and 22508 transitions.
[2023-11-28 20:38:12,319 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 253.8) internal successors, (1269), 4 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states 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 20:38:12,319 INFO  L276                IsEmpty]: Start isEmpty. Operand 13508 states and 22508 transitions.
[2023-11-28 20:38:13,083 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8999
[2023-11-28 20:38:13,084 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:38:13,090 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:38:13,090 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-11-28 20:38:13,090 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:38:13,091 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:38:13,095 INFO  L85        PathProgramCache]: Analyzing trace with hash -350308461, now seen corresponding path program 1 times
[2023-11-28 20:38:13,095 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:38:13,095 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293098682]
[2023-11-28 20:38:13,097 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:38:13,097 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:38:14,719 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:38:14,719 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [884993861]
[2023-11-28 20:38:14,722 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:38:14,723 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:38:14,723 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:38:14,725 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:38:14,732 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-28 20:38:27,924 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:38:28,229 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45327 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 20:38:28,482 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:38:30,185 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 8 proven. 675 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked.
[2023-11-28 20:38:30,185 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:38:30,557 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 904 trivial. 0 not checked.
[2023-11-28 20:38:30,557 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:38:30,557 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293098682]
[2023-11-28 20:38:30,558 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:38:30,558 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884993861]
[2023-11-28 20:38:30,558 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [884993861] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:38:30,558 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:38:30,563 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12
[2023-11-28 20:38:30,563 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777760638]
[2023-11-28 20:38:30,563 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:38:30,574 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-28 20:38:30,574 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:38:30,582 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-28 20:38:30,582 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132
[2023-11-28 20:38:30,585 INFO  L87              Difference]: Start difference. First operand 13508 states and 22508 transitions. Second operand  has 6 states, 6 states have (on average 1349.1666666666667) internal successors, (8095), 6 states have internal predecessors, (8095), 0 states have call successors, (0), 0 states 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 20:39:03,213 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:39:03,213 INFO  L93              Difference]: Finished difference Result 58760 states and 97506 transitions.
[2023-11-28 20:39:03,214 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-11-28 20:39:03,215 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 1349.1666666666667) internal successors, (8095), 6 states have internal predecessors, (8095), 0 states have call successors, (0), 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 8998
[2023-11-28 20:39:03,231 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:39:03,262 INFO  L225             Difference]: With dead ends: 58760
[2023-11-28 20:39:03,262 INFO  L226             Difference]: Without dead ends: 36740
[2023-11-28 20:39:03,279 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17996 GetRequests, 17984 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 20:39:03,280 INFO  L413           NwaCegarLoop]: 32111 mSDtfsCounter, 54392 mSDsluCounter, 108834 mSDsCounter, 0 mSdLazyCounter, 46689 mSolverCounterSat, 1218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54392 SdHoareTripleChecker+Valid, 140945 SdHoareTripleChecker+Invalid, 47907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.5s SdHoareTripleChecker+Time, 1218 IncrementalHoareTripleChecker+Valid, 46689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.9s IncrementalHoareTripleChecker+Time
[2023-11-28 20:39:03,281 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [54392 Valid, 140945 Invalid, 47907 Unknown, 0 Unchecked, 0.5s Time], IncrementalHoareTripleChecker [1218 Valid, 46689 Invalid, 0 Unknown, 0 Unchecked, 30.9s Time]
[2023-11-28 20:39:03,321 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 36740 states.
[2023-11-28 20:39:03,552 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 36740 to 13510.
[2023-11-28 20:39:03,566 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13510 states, 13509 states have (on average 1.666296543045377) internal successors, (22510), 13509 states have internal predecessors, (22510), 0 states have call successors, (0), 0 states 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 20:39:03,587 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13510 states to 13510 states and 22510 transitions.
[2023-11-28 20:39:03,588 INFO  L78                 Accepts]: Start accepts. Automaton has 13510 states and 22510 transitions. Word has length 8998
[2023-11-28 20:39:03,596 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:39:03,596 INFO  L495      AbstractCegarLoop]: Abstraction has 13510 states and 22510 transitions.
[2023-11-28 20:39:03,598 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 1349.1666666666667) internal successors, (8095), 6 states have internal predecessors, (8095), 0 states have call successors, (0), 0 states 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 20:39:03,598 INFO  L276                IsEmpty]: Start isEmpty. Operand 13510 states and 22510 transitions.
[2023-11-28 20:39:03,978 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9000
[2023-11-28 20:39:03,978 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:39:03,983 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:39:04,108 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-28 20:39:04,184 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:39:04,184 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:39:04,185 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:39:04,187 INFO  L85        PathProgramCache]: Analyzing trace with hash 1826544019, now seen corresponding path program 1 times
[2023-11-28 20:39:04,188 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:39:04,188 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900530866]
[2023-11-28 20:39:04,189 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:39:04,189 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:39:05,359 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:39:05,359 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1863189639]
[2023-11-28 20:39:05,361 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:39:05,362 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:39:05,362 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:39:05,363 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:39:05,365 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-28 20:39:17,810 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:39:18,116 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45330 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:39:18,264 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:39:19,684 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 10 proven. 675 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked.
[2023-11-28 20:39:19,684 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:39:19,858 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 902 trivial. 0 not checked.
[2023-11-28 20:39:19,859 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:39:19,859 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900530866]
[2023-11-28 20:39:19,859 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:39:19,859 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863189639]
[2023-11-28 20:39:19,859 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863189639] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:39:19,859 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:39:19,864 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:39:19,865 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533342663]
[2023-11-28 20:39:19,865 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:39:19,874 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:39:19,874 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:39:19,883 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:39:19,883 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:39:19,886 INFO  L87              Difference]: Start difference. First operand 13510 states and 22510 transitions. Second operand  has 5 states, 5 states have (on average 1619.6) internal successors, (8098), 5 states have internal predecessors, (8098), 0 states have call successors, (0), 0 states 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 20:39:35,176 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:39:35,176 INFO  L93              Difference]: Finished difference Result 47149 states and 78155 transitions.
[2023-11-28 20:39:35,177 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:39:35,178 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1619.6) internal successors, (8098), 5 states have internal predecessors, (8098), 0 states have call successors, (0), 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 8999
[2023-11-28 20:39:35,190 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:39:35,220 INFO  L225             Difference]: With dead ends: 47149
[2023-11-28 20:39:35,220 INFO  L226             Difference]: Without dead ends: 25122
[2023-11-28 20:39:35,232 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17997 GetRequests, 17988 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:39:35,233 INFO  L413           NwaCegarLoop]: 32101 mSDtfsCounter, 50731 mSDsluCounter, 31879 mSDsCounter, 0 mSdLazyCounter, 16938 mSolverCounterSat, 1216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50731 SdHoareTripleChecker+Valid, 63980 SdHoareTripleChecker+Invalid, 18154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1216 IncrementalHoareTripleChecker+Valid, 16938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time
[2023-11-28 20:39:35,233 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50731 Valid, 63980 Invalid, 18154 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1216 Valid, 16938 Invalid, 0 Unknown, 0 Unchecked, 14.5s Time]
[2023-11-28 20:39:35,263 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25122 states.
[2023-11-28 20:39:35,468 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25122 to 13512.
[2023-11-28 20:39:35,483 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13512 states, 13511 states have (on average 1.666197912811783) internal successors, (22512), 13511 states have internal predecessors, (22512), 0 states have call successors, (0), 0 states 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 20:39:35,505 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13512 states to 13512 states and 22512 transitions.
[2023-11-28 20:39:35,505 INFO  L78                 Accepts]: Start accepts. Automaton has 13512 states and 22512 transitions. Word has length 8999
[2023-11-28 20:39:35,514 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:39:35,514 INFO  L495      AbstractCegarLoop]: Abstraction has 13512 states and 22512 transitions.
[2023-11-28 20:39:35,516 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1619.6) internal successors, (8098), 5 states have internal predecessors, (8098), 0 states have call successors, (0), 0 states 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 20:39:35,516 INFO  L276                IsEmpty]: Start isEmpty. Operand 13512 states and 22512 transitions.
[2023-11-28 20:39:35,868 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9001
[2023-11-28 20:39:35,869 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:39:35,873 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:39:35,998 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2023-11-28 20:39:36,073 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:39:36,074 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:39:36,074 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:39:36,077 INFO  L85        PathProgramCache]: Analyzing trace with hash 328284345, now seen corresponding path program 1 times
[2023-11-28 20:39:36,077 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:39:36,077 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750536962]
[2023-11-28 20:39:36,078 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:39:36,078 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:39:37,027 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:39:37,027 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1135281633]
[2023-11-28 20:39:37,028 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:39:37,028 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:39:37,029 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:39:37,029 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:39:37,030 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-28 20:39:49,295 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:39:49,624 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45333 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:39:49,767 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:39:50,804 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 12 proven. 675 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked.
[2023-11-28 20:39:50,805 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:39:50,973 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked.
[2023-11-28 20:39:50,973 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:39:50,973 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750536962]
[2023-11-28 20:39:50,973 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:39:50,973 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135281633]
[2023-11-28 20:39:50,973 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135281633] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:39:50,973 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:39:50,978 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:39:50,978 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089182929]
[2023-11-28 20:39:50,978 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:39:50,984 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:39:50,984 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:39:50,990 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:39:50,990 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:39:50,993 INFO  L87              Difference]: Start difference. First operand 13512 states and 22512 transitions. Second operand  has 5 states, 5 states have (on average 1620.2) internal successors, (8101), 5 states have internal predecessors, (8101), 0 states have call successors, (0), 0 states 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 20:40:07,893 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:40:07,893 INFO  L93              Difference]: Finished difference Result 47157 states and 78163 transitions.
[2023-11-28 20:40:07,894 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:40:07,895 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1620.2) internal successors, (8101), 5 states have internal predecessors, (8101), 0 states have call successors, (0), 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 9000
[2023-11-28 20:40:07,903 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:40:07,924 INFO  L225             Difference]: With dead ends: 47157
[2023-11-28 20:40:07,924 INFO  L226             Difference]: Without dead ends: 25123
[2023-11-28 20:40:07,940 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17999 GetRequests, 17990 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:40:07,941 INFO  L413           NwaCegarLoop]: 32093 mSDtfsCounter, 35029 mSDsluCounter, 48617 mSDsCounter, 0 mSdLazyCounter, 22682 mSolverCounterSat, 1216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35029 SdHoareTripleChecker+Valid, 80710 SdHoareTripleChecker+Invalid, 23898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1216 IncrementalHoareTripleChecker+Valid, 22682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:40:07,942 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [35029 Valid, 80710 Invalid, 23898 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1216 Valid, 22682 Invalid, 0 Unknown, 0 Unchecked, 16.1s Time]
[2023-11-28 20:40:07,971 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25123 states.
[2023-11-28 20:40:08,161 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25123 to 13514.
[2023-11-28 20:40:08,176 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13514 states, 13513 states have (on average 1.6660993117738474) internal successors, (22514), 13513 states have internal predecessors, (22514), 0 states have call successors, (0), 0 states 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 20:40:08,197 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13514 states to 13514 states and 22514 transitions.
[2023-11-28 20:40:08,197 INFO  L78                 Accepts]: Start accepts. Automaton has 13514 states and 22514 transitions. Word has length 9000
[2023-11-28 20:40:08,203 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:40:08,203 INFO  L495      AbstractCegarLoop]: Abstraction has 13514 states and 22514 transitions.
[2023-11-28 20:40:08,204 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1620.2) internal successors, (8101), 5 states have internal predecessors, (8101), 0 states have call successors, (0), 0 states 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 20:40:08,204 INFO  L276                IsEmpty]: Start isEmpty. Operand 13514 states and 22514 transitions.
[2023-11-28 20:40:08,604 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9002
[2023-11-28 20:40:08,604 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:40:08,608 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:40:08,734 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2023-11-28 20:40:08,809 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:40:08,809 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:40:08,811 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:40:08,814 INFO  L85        PathProgramCache]: Analyzing trace with hash 216983279, now seen corresponding path program 1 times
[2023-11-28 20:40:08,814 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:40:08,814 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445266672]
[2023-11-28 20:40:08,815 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:40:08,815 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:40:09,784 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:40:09,784 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905004728]
[2023-11-28 20:40:09,786 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:40:09,787 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:40:09,787 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:40:09,788 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:40:09,789 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-28 20:40:22,139 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:40:22,468 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45337 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:40:22,891 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:40:23,955 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 14 proven. 675 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked.
[2023-11-28 20:40:23,955 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:40:24,119 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked.
[2023-11-28 20:40:24,119 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:40:24,119 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445266672]
[2023-11-28 20:40:24,120 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:40:24,120 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905004728]
[2023-11-28 20:40:24,120 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905004728] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:40:24,120 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:40:24,126 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:40:24,126 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372709607]
[2023-11-28 20:40:24,126 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:40:24,132 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:40:24,133 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:40:24,138 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:40:24,138 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:40:24,140 INFO  L87              Difference]: Start difference. First operand 13514 states and 22514 transitions. Second operand  has 5 states, 5 states have (on average 1620.8) internal successors, (8104), 5 states have internal predecessors, (8104), 0 states have call successors, (0), 0 states 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 20:40:41,174 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:40:41,174 INFO  L93              Difference]: Finished difference Result 47165 states and 78171 transitions.
[2023-11-28 20:40:41,175 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:40:41,177 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1620.8) internal successors, (8104), 5 states have internal predecessors, (8104), 0 states have call successors, (0), 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 9001
[2023-11-28 20:40:41,183 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:40:41,203 INFO  L225             Difference]: With dead ends: 47165
[2023-11-28 20:40:41,203 INFO  L226             Difference]: Without dead ends: 25124
[2023-11-28 20:40:41,213 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18001 GetRequests, 17992 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:40:41,214 INFO  L413           NwaCegarLoop]: 32085 mSDtfsCounter, 35023 mSDsluCounter, 48607 mSDsCounter, 0 mSdLazyCounter, 22682 mSolverCounterSat, 1216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35023 SdHoareTripleChecker+Valid, 80692 SdHoareTripleChecker+Invalid, 23898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1216 IncrementalHoareTripleChecker+Valid, 22682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time
[2023-11-28 20:40:41,214 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [35023 Valid, 80692 Invalid, 23898 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1216 Valid, 22682 Invalid, 0 Unknown, 0 Unchecked, 16.2s Time]
[2023-11-28 20:40:41,239 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25124 states.
[2023-11-28 20:40:41,390 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25124 to 13516.
[2023-11-28 20:40:41,403 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13516 states, 13515 states have (on average 1.666000739918609) internal successors, (22516), 13515 states have internal predecessors, (22516), 0 states have call successors, (0), 0 states 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 20:40:41,420 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13516 states to 13516 states and 22516 transitions.
[2023-11-28 20:40:41,420 INFO  L78                 Accepts]: Start accepts. Automaton has 13516 states and 22516 transitions. Word has length 9001
[2023-11-28 20:40:41,425 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:40:41,425 INFO  L495      AbstractCegarLoop]: Abstraction has 13516 states and 22516 transitions.
[2023-11-28 20:40:41,427 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1620.8) internal successors, (8104), 5 states have internal predecessors, (8104), 0 states have call successors, (0), 0 states 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 20:40:41,427 INFO  L276                IsEmpty]: Start isEmpty. Operand 13516 states and 22516 transitions.
[2023-11-28 20:40:41,731 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9003
[2023-11-28 20:40:41,732 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:40:41,736 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:40:41,864 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0
[2023-11-28 20:40:41,936 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:40:41,937 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:40:41,937 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:40:41,940 INFO  L85        PathProgramCache]: Analyzing trace with hash 623484769, now seen corresponding path program 1 times
[2023-11-28 20:40:41,940 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:40:41,940 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809173688]
[2023-11-28 20:40:41,941 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:40:41,941 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:40:42,947 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:40:42,947 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [695822291]
[2023-11-28 20:40:42,948 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:40:42,949 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:40:42,949 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:40:42,950 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:40:42,951 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-28 20:40:54,980 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:40:55,282 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45340 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:40:55,425 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:40:56,546 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 16 proven. 675 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked.
[2023-11-28 20:40:56,546 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:40:56,716 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 896 trivial. 0 not checked.
[2023-11-28 20:40:56,717 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:40:56,717 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809173688]
[2023-11-28 20:40:56,717 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:40:56,717 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695822291]
[2023-11-28 20:40:56,717 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [695822291] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:40:56,717 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:40:56,721 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:40:56,722 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222542962]
[2023-11-28 20:40:56,722 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:40:56,728 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:40:56,728 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:40:56,733 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:40:56,734 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:40:56,736 INFO  L87              Difference]: Start difference. First operand 13516 states and 22516 transitions. Second operand  has 5 states, 5 states have (on average 1621.4) internal successors, (8107), 5 states have internal predecessors, (8107), 0 states have call successors, (0), 0 states 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 20:41:13,495 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:41:13,495 INFO  L93              Difference]: Finished difference Result 47173 states and 78179 transitions.
[2023-11-28 20:41:13,495 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:41:13,497 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1621.4) internal successors, (8107), 5 states have internal predecessors, (8107), 0 states have call successors, (0), 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 9002
[2023-11-28 20:41:13,503 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:41:13,523 INFO  L225             Difference]: With dead ends: 47173
[2023-11-28 20:41:13,524 INFO  L226             Difference]: Without dead ends: 25125
[2023-11-28 20:41:13,536 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18003 GetRequests, 17994 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:41:13,536 INFO  L413           NwaCegarLoop]: 32077 mSDtfsCounter, 35023 mSDsluCounter, 46329 mSDsCounter, 0 mSdLazyCounter, 21806 mSolverCounterSat, 1216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35023 SdHoareTripleChecker+Valid, 78406 SdHoareTripleChecker+Invalid, 23022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1216 IncrementalHoareTripleChecker+Valid, 21806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time
[2023-11-28 20:41:13,537 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [35023 Valid, 78406 Invalid, 23022 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1216 Valid, 21806 Invalid, 0 Unknown, 0 Unchecked, 16.0s Time]
[2023-11-28 20:41:13,562 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25125 states.
[2023-11-28 20:41:13,714 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25125 to 13518.
[2023-11-28 20:41:13,727 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13518 states, 13517 states have (on average 1.6659021972331138) internal successors, (22518), 13517 states have internal predecessors, (22518), 0 states have call successors, (0), 0 states 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 20:41:13,743 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13518 states to 13518 states and 22518 transitions.
[2023-11-28 20:41:13,743 INFO  L78                 Accepts]: Start accepts. Automaton has 13518 states and 22518 transitions. Word has length 9002
[2023-11-28 20:41:13,749 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:41:13,749 INFO  L495      AbstractCegarLoop]: Abstraction has 13518 states and 22518 transitions.
[2023-11-28 20:41:13,751 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1621.4) internal successors, (8107), 5 states have internal predecessors, (8107), 0 states have call successors, (0), 0 states 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 20:41:13,751 INFO  L276                IsEmpty]: Start isEmpty. Operand 13518 states and 22518 transitions.
[2023-11-28 20:41:14,066 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9004
[2023-11-28 20:41:14,066 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:41:14,070 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:41:14,197 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2023-11-28 20:41:14,270 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:41:14,271 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:41:14,271 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:41:14,274 INFO  L85        PathProgramCache]: Analyzing trace with hash -1472749879, now seen corresponding path program 1 times
[2023-11-28 20:41:14,274 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:41:14,274 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067430375]
[2023-11-28 20:41:14,275 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:41:14,275 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:41:15,230 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:41:15,231 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [75600242]
[2023-11-28 20:41:15,232 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:41:15,232 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:41:15,232 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:41:15,233 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:41:15,234 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-28 20:41:27,800 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:41:28,105 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45343 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:41:28,248 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:41:29,282 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 18 proven. 675 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked.
[2023-11-28 20:41:29,282 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:41:29,459 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 894 trivial. 0 not checked.
[2023-11-28 20:41:29,459 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:41:29,459 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067430375]
[2023-11-28 20:41:29,459 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:41:29,459 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75600242]
[2023-11-28 20:41:29,459 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [75600242] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:41:29,459 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:41:29,464 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:41:29,464 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755405267]
[2023-11-28 20:41:29,464 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:41:29,470 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:41:29,470 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:41:29,476 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:41:29,476 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:41:29,478 INFO  L87              Difference]: Start difference. First operand 13518 states and 22518 transitions. Second operand  has 5 states, 5 states have (on average 1622.0) internal successors, (8110), 5 states have internal predecessors, (8110), 0 states have call successors, (0), 0 states 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 20:41:46,715 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:41:46,715 INFO  L93              Difference]: Finished difference Result 47181 states and 78187 transitions.
[2023-11-28 20:41:46,716 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:41:46,717 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1622.0) internal successors, (8110), 5 states have internal predecessors, (8110), 0 states have call successors, (0), 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 9003
[2023-11-28 20:41:46,723 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:41:46,742 INFO  L225             Difference]: With dead ends: 47181
[2023-11-28 20:41:46,742 INFO  L226             Difference]: Without dead ends: 25126
[2023-11-28 20:41:46,751 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18005 GetRequests, 17996 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:41:46,752 INFO  L413           NwaCegarLoop]: 32069 mSDtfsCounter, 35018 mSDsluCounter, 46321 mSDsCounter, 0 mSdLazyCounter, 21806 mSolverCounterSat, 1216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35018 SdHoareTripleChecker+Valid, 78390 SdHoareTripleChecker+Invalid, 23022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1216 IncrementalHoareTripleChecker+Valid, 21806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time
[2023-11-28 20:41:46,752 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [35018 Valid, 78390 Invalid, 23022 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1216 Valid, 21806 Invalid, 0 Unknown, 0 Unchecked, 16.4s Time]
[2023-11-28 20:41:46,777 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25126 states.
[2023-11-28 20:41:46,920 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25126 to 13520.
[2023-11-28 20:41:46,933 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13520 states, 13519 states have (on average 1.6658036837044161) internal successors, (22520), 13519 states have internal predecessors, (22520), 0 states have call successors, (0), 0 states 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 20:41:46,949 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13520 states to 13520 states and 22520 transitions.
[2023-11-28 20:41:46,950 INFO  L78                 Accepts]: Start accepts. Automaton has 13520 states and 22520 transitions. Word has length 9003
[2023-11-28 20:41:46,955 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:41:46,956 INFO  L495      AbstractCegarLoop]: Abstraction has 13520 states and 22520 transitions.
[2023-11-28 20:41:46,957 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1622.0) internal successors, (8110), 5 states have internal predecessors, (8110), 0 states have call successors, (0), 0 states 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 20:41:46,957 INFO  L276                IsEmpty]: Start isEmpty. Operand 13520 states and 22520 transitions.
[2023-11-28 20:41:47,274 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9005
[2023-11-28 20:41:47,274 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:41:47,277 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:41:47,404 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0
[2023-11-28 20:41:47,478 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2023-11-28 20:41:47,478 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:41:47,478 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:41:47,482 INFO  L85        PathProgramCache]: Analyzing trace with hash -294566777, now seen corresponding path program 1 times
[2023-11-28 20:41:47,482 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:41:47,482 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858952778]
[2023-11-28 20:41:47,483 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:41:47,483 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:41:48,400 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:41:48,401 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [422754508]
[2023-11-28 20:41:48,402 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:41:48,402 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:41:48,402 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:41:48,403 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:41:48,404 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-28 20:42:00,752 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:42:01,056 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45346 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:42:01,201 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:42:02,220 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 20 proven. 675 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked.
[2023-11-28 20:42:02,221 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:42:02,394 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 892 trivial. 0 not checked.
[2023-11-28 20:42:02,394 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:42:02,394 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858952778]
[2023-11-28 20:42:02,394 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:42:02,394 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422754508]
[2023-11-28 20:42:02,394 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [422754508] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:42:02,394 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:42:02,399 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:42:02,399 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950506846]
[2023-11-28 20:42:02,399 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:42:02,407 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:42:02,407 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:42:02,414 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:42:02,414 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:42:02,416 INFO  L87              Difference]: Start difference. First operand 13520 states and 22520 transitions. Second operand  has 5 states, 5 states have (on average 1622.6) internal successors, (8113), 5 states have internal predecessors, (8113), 0 states have call successors, (0), 0 states 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 20:42:19,411 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:42:19,411 INFO  L93              Difference]: Finished difference Result 47189 states and 78195 transitions.
[2023-11-28 20:42:19,412 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:42:19,413 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1622.6) internal successors, (8113), 5 states have internal predecessors, (8113), 0 states have call successors, (0), 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 9004
[2023-11-28 20:42:19,419 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:42:19,439 INFO  L225             Difference]: With dead ends: 47189
[2023-11-28 20:42:19,440 INFO  L226             Difference]: Without dead ends: 25127
[2023-11-28 20:42:19,451 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18007 GetRequests, 17998 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:42:19,451 INFO  L413           NwaCegarLoop]: 32061 mSDtfsCounter, 35005 mSDsluCounter, 48577 mSDsCounter, 0 mSdLazyCounter, 22682 mSolverCounterSat, 1216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35005 SdHoareTripleChecker+Valid, 80638 SdHoareTripleChecker+Invalid, 23898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1216 IncrementalHoareTripleChecker+Valid, 22682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time
[2023-11-28 20:42:19,452 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [35005 Valid, 80638 Invalid, 23898 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1216 Valid, 22682 Invalid, 0 Unknown, 0 Unchecked, 16.2s Time]
[2023-11-28 20:42:19,476 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25127 states.
[2023-11-28 20:42:19,623 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25127 to 13522.
[2023-11-28 20:42:19,635 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13522 states, 13521 states have (on average 1.665705199319577) internal successors, (22522), 13521 states have internal predecessors, (22522), 0 states have call successors, (0), 0 states 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 20:42:19,651 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13522 states to 13522 states and 22522 transitions.
[2023-11-28 20:42:19,652 INFO  L78                 Accepts]: Start accepts. Automaton has 13522 states and 22522 transitions. Word has length 9004
[2023-11-28 20:42:19,657 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:42:19,657 INFO  L495      AbstractCegarLoop]: Abstraction has 13522 states and 22522 transitions.
[2023-11-28 20:42:19,658 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1622.6) internal successors, (8113), 5 states have internal predecessors, (8113), 0 states have call successors, (0), 0 states 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 20:42:19,659 INFO  L276                IsEmpty]: Start isEmpty. Operand 13522 states and 22522 transitions.
[2023-11-28 20:42:19,979 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9006
[2023-11-28 20:42:19,979 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:42:19,981 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:42:20,106 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0
[2023-11-28 20:42:20,181 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:42:20,182 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:42:20,182 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:42:20,186 INFO  L85        PathProgramCache]: Analyzing trace with hash -2079558363, now seen corresponding path program 1 times
[2023-11-28 20:42:20,186 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:42:20,186 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967073115]
[2023-11-28 20:42:20,187 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:42:20,187 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:42:21,112 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:42:21,113 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1019875226]
[2023-11-28 20:42:21,114 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:42:21,114 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:42:21,115 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:42:21,115 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:42:21,116 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-11-28 20:42:33,221 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:42:33,523 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45350 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:42:33,644 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:42:34,911 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 22 proven. 675 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked.
[2023-11-28 20:42:34,911 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:42:35,070 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 890 trivial. 0 not checked.
[2023-11-28 20:42:35,070 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:42:35,070 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967073115]
[2023-11-28 20:42:35,070 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:42:35,070 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019875226]
[2023-11-28 20:42:35,070 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019875226] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:42:35,070 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:42:35,077 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:42:35,077 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192024067]
[2023-11-28 20:42:35,077 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:42:35,083 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:42:35,083 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:42:35,090 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:42:35,090 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:42:35,093 INFO  L87              Difference]: Start difference. First operand 13522 states and 22522 transitions. Second operand  has 5 states, 5 states have (on average 1623.2) internal successors, (8116), 5 states have internal predecessors, (8116), 0 states have call successors, (0), 0 states 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 20:42:51,992 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:42:51,992 INFO  L93              Difference]: Finished difference Result 47197 states and 78203 transitions.
[2023-11-28 20:42:51,993 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:42:51,994 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1623.2) internal successors, (8116), 5 states have internal predecessors, (8116), 0 states have call successors, (0), 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 9005
[2023-11-28 20:42:52,001 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:42:52,023 INFO  L225             Difference]: With dead ends: 47197
[2023-11-28 20:42:52,023 INFO  L226             Difference]: Without dead ends: 25128
[2023-11-28 20:42:52,036 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18009 GetRequests, 18000 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:42:52,037 INFO  L413           NwaCegarLoop]: 32053 mSDtfsCounter, 34999 mSDsluCounter, 48567 mSDsCounter, 0 mSdLazyCounter, 22682 mSolverCounterSat, 1216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34999 SdHoareTripleChecker+Valid, 80620 SdHoareTripleChecker+Invalid, 23898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1216 IncrementalHoareTripleChecker+Valid, 22682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:42:52,037 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34999 Valid, 80620 Invalid, 23898 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1216 Valid, 22682 Invalid, 0 Unknown, 0 Unchecked, 16.1s Time]
[2023-11-28 20:42:52,063 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25128 states.
[2023-11-28 20:42:52,214 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25128 to 13524.
[2023-11-28 20:42:52,226 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13524 states, 13523 states have (on average 1.665606744065666) internal successors, (22524), 13523 states have internal predecessors, (22524), 0 states have call successors, (0), 0 states 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 20:42:52,243 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13524 states to 13524 states and 22524 transitions.
[2023-11-28 20:42:52,243 INFO  L78                 Accepts]: Start accepts. Automaton has 13524 states and 22524 transitions. Word has length 9005
[2023-11-28 20:42:52,249 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:42:52,249 INFO  L495      AbstractCegarLoop]: Abstraction has 13524 states and 22524 transitions.
[2023-11-28 20:42:52,251 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1623.2) internal successors, (8116), 5 states have internal predecessors, (8116), 0 states have call successors, (0), 0 states 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 20:42:52,251 INFO  L276                IsEmpty]: Start isEmpty. Operand 13524 states and 22524 transitions.
[2023-11-28 20:42:52,634 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9007
[2023-11-28 20:42:52,635 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:42:52,636 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:42:52,764 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0
[2023-11-28 20:42:52,837 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:42:52,837 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:42:52,839 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:42:52,840 INFO  L85        PathProgramCache]: Analyzing trace with hash 1283546159, now seen corresponding path program 1 times
[2023-11-28 20:42:52,840 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:42:52,841 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900027705]
[2023-11-28 20:42:52,841 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:42:52,842 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:42:53,768 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:42:53,768 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270361746]
[2023-11-28 20:42:53,770 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:42:53,770 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:42:53,770 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:42:53,771 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:42:53,772 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-11-28 20:43:05,800 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:43:06,095 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45353 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:43:06,219 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:43:07,257 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 24 proven. 675 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked.
[2023-11-28 20:43:07,257 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:43:07,423 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 888 trivial. 0 not checked.
[2023-11-28 20:43:07,423 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:43:07,423 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900027705]
[2023-11-28 20:43:07,423 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:43:07,423 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270361746]
[2023-11-28 20:43:07,424 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [270361746] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:43:07,424 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:43:07,430 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:43:07,430 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583126231]
[2023-11-28 20:43:07,430 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:43:07,434 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:43:07,434 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:43:07,439 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:43:07,439 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:43:07,441 INFO  L87              Difference]: Start difference. First operand 13524 states and 22524 transitions. Second operand  has 5 states, 5 states have (on average 1623.8) internal successors, (8119), 5 states have internal predecessors, (8119), 0 states have call successors, (0), 0 states 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 20:43:22,528 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:43:22,528 INFO  L93              Difference]: Finished difference Result 47205 states and 78211 transitions.
[2023-11-28 20:43:22,529 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:43:22,530 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1623.8) internal successors, (8119), 5 states have internal predecessors, (8119), 0 states have call successors, (0), 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 9006
[2023-11-28 20:43:22,536 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:43:22,557 INFO  L225             Difference]: With dead ends: 47205
[2023-11-28 20:43:22,557 INFO  L226             Difference]: Without dead ends: 25129
[2023-11-28 20:43:22,570 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18011 GetRequests, 18002 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:43:22,571 INFO  L413           NwaCegarLoop]: 32045 mSDtfsCounter, 50665 mSDsluCounter, 31845 mSDsCounter, 0 mSdLazyCounter, 16938 mSolverCounterSat, 1216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50665 SdHoareTripleChecker+Valid, 63890 SdHoareTripleChecker+Invalid, 18154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1216 IncrementalHoareTripleChecker+Valid, 16938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time
[2023-11-28 20:43:22,571 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50665 Valid, 63890 Invalid, 18154 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1216 Valid, 16938 Invalid, 0 Unknown, 0 Unchecked, 14.3s Time]
[2023-11-28 20:43:22,596 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25129 states.
[2023-11-28 20:43:22,744 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25129 to 13526.
[2023-11-28 20:43:22,756 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13526 states, 13525 states have (on average 1.6655083179297596) internal successors, (22526), 13525 states have internal predecessors, (22526), 0 states have call successors, (0), 0 states 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 20:43:22,772 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13526 states to 13526 states and 22526 transitions.
[2023-11-28 20:43:22,772 INFO  L78                 Accepts]: Start accepts. Automaton has 13526 states and 22526 transitions. Word has length 9006
[2023-11-28 20:43:22,777 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:43:22,777 INFO  L495      AbstractCegarLoop]: Abstraction has 13526 states and 22526 transitions.
[2023-11-28 20:43:22,779 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1623.8) internal successors, (8119), 5 states have internal predecessors, (8119), 0 states have call successors, (0), 0 states 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 20:43:22,779 INFO  L276                IsEmpty]: Start isEmpty. Operand 13526 states and 22526 transitions.
[2023-11-28 20:43:23,098 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9008
[2023-11-28 20:43:23,098 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:43:23,100 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:43:23,227 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0
[2023-11-28 20:43:23,301 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:43:23,301 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:43:23,302 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:43:23,303 INFO  L85        PathProgramCache]: Analyzing trace with hash -1086887681, now seen corresponding path program 1 times
[2023-11-28 20:43:23,303 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:43:23,303 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518683181]
[2023-11-28 20:43:23,304 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:43:23,305 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:43:24,214 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:43:24,214 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174057845]
[2023-11-28 20:43:24,216 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:43:24,217 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:43:24,217 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:43:24,218 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:43:24,220 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2023-11-28 20:43:36,493 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:43:36,797 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45356 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:43:36,921 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:43:38,104 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 26 proven. 675 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked.
[2023-11-28 20:43:38,104 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:43:38,287 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked.
[2023-11-28 20:43:38,287 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:43:38,287 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518683181]
[2023-11-28 20:43:38,288 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:43:38,288 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174057845]
[2023-11-28 20:43:38,288 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [174057845] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:43:38,288 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:43:38,292 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:43:38,292 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470202701]
[2023-11-28 20:43:38,293 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:43:38,297 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:43:38,297 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:43:38,301 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:43:38,301 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:43:38,303 INFO  L87              Difference]: Start difference. First operand 13526 states and 22526 transitions. Second operand  has 5 states, 5 states have (on average 1624.4) internal successors, (8122), 5 states have internal predecessors, (8122), 0 states have call successors, (0), 0 states 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 20:43:55,356 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:43:55,356 INFO  L93              Difference]: Finished difference Result 47213 states and 78219 transitions.
[2023-11-28 20:43:55,357 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:43:55,358 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1624.4) internal successors, (8122), 5 states have internal predecessors, (8122), 0 states have call successors, (0), 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 9007
[2023-11-28 20:43:55,364 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:43:55,381 INFO  L225             Difference]: With dead ends: 47213
[2023-11-28 20:43:55,382 INFO  L226             Difference]: Without dead ends: 25130
[2023-11-28 20:43:55,389 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18013 GetRequests, 18004 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:43:55,389 INFO  L413           NwaCegarLoop]: 32037 mSDtfsCounter, 34987 mSDsluCounter, 48547 mSDsCounter, 0 mSdLazyCounter, 22682 mSolverCounterSat, 1216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34987 SdHoareTripleChecker+Valid, 80584 SdHoareTripleChecker+Invalid, 23898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1216 IncrementalHoareTripleChecker+Valid, 22682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time
[2023-11-28 20:43:55,390 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34987 Valid, 80584 Invalid, 23898 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1216 Valid, 22682 Invalid, 0 Unknown, 0 Unchecked, 16.2s Time]
[2023-11-28 20:43:55,413 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25130 states.
[2023-11-28 20:43:55,544 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25130 to 13528.
[2023-11-28 20:43:55,557 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13528 states, 13527 states have (on average 1.6654099208989428) internal successors, (22528), 13527 states have internal predecessors, (22528), 0 states have call successors, (0), 0 states 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 20:43:55,573 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13528 states to 13528 states and 22528 transitions.
[2023-11-28 20:43:55,573 INFO  L78                 Accepts]: Start accepts. Automaton has 13528 states and 22528 transitions. Word has length 9007
[2023-11-28 20:43:55,579 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:43:55,579 INFO  L495      AbstractCegarLoop]: Abstraction has 13528 states and 22528 transitions.
[2023-11-28 20:43:55,580 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1624.4) internal successors, (8122), 5 states have internal predecessors, (8122), 0 states have call successors, (0), 0 states 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 20:43:55,580 INFO  L276                IsEmpty]: Start isEmpty. Operand 13528 states and 22528 transitions.
[2023-11-28 20:43:55,903 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9009
[2023-11-28 20:43:55,903 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:43:55,905 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:43:56,033 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0
[2023-11-28 20:43:56,106 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:43:56,106 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:43:56,106 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:43:56,108 INFO  L85        PathProgramCache]: Analyzing trace with hash -1939233451, now seen corresponding path program 1 times
[2023-11-28 20:43:56,108 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:43:56,108 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047255987]
[2023-11-28 20:43:56,109 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:43:56,109 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:43:57,137 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:43:57,138 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [951649535]
[2023-11-28 20:43:57,139 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:43:57,140 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:43:57,140 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:43:57,141 INFO  L229       MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:43:57,141 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2023-11-28 20:44:09,556 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:44:09,865 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45359 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:44:10,261 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:44:11,531 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 28 proven. 675 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked.
[2023-11-28 20:44:11,532 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:44:11,714 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 884 trivial. 0 not checked.
[2023-11-28 20:44:11,714 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:44:11,714 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047255987]
[2023-11-28 20:44:11,714 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:44:11,714 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951649535]
[2023-11-28 20:44:11,714 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [951649535] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:44:11,714 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:44:11,719 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:44:11,719 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324531298]
[2023-11-28 20:44:11,719 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:44:11,723 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:44:11,723 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:44:11,729 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:44:11,730 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:44:11,732 INFO  L87              Difference]: Start difference. First operand 13528 states and 22528 transitions. Second operand  has 5 states, 5 states have (on average 1625.0) internal successors, (8125), 5 states have internal predecessors, (8125), 0 states have call successors, (0), 0 states 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 20:44:26,913 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:44:26,913 INFO  L93              Difference]: Finished difference Result 47221 states and 78227 transitions.
[2023-11-28 20:44:26,913 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:44:26,915 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1625.0) internal successors, (8125), 5 states have internal predecessors, (8125), 0 states have call successors, (0), 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 9008
[2023-11-28 20:44:26,921 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:44:26,936 INFO  L225             Difference]: With dead ends: 47221
[2023-11-28 20:44:26,936 INFO  L226             Difference]: Without dead ends: 25131
[2023-11-28 20:44:26,941 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18015 GetRequests, 18006 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:44:26,942 INFO  L413           NwaCegarLoop]: 32029 mSDtfsCounter, 50659 mSDsluCounter, 31834 mSDsCounter, 0 mSdLazyCounter, 16938 mSolverCounterSat, 1216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50659 SdHoareTripleChecker+Valid, 63863 SdHoareTripleChecker+Invalid, 18154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1216 IncrementalHoareTripleChecker+Valid, 16938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time
[2023-11-28 20:44:26,942 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50659 Valid, 63863 Invalid, 18154 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1216 Valid, 16938 Invalid, 0 Unknown, 0 Unchecked, 14.3s Time]
[2023-11-28 20:44:26,963 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25131 states.
[2023-11-28 20:44:27,096 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25131 to 13530.
[2023-11-28 20:44:27,109 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13530 states, 13529 states have (on average 1.6653115529603075) internal successors, (22530), 13529 states have internal predecessors, (22530), 0 states have call successors, (0), 0 states 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 20:44:27,126 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13530 states to 13530 states and 22530 transitions.
[2023-11-28 20:44:27,126 INFO  L78                 Accepts]: Start accepts. Automaton has 13530 states and 22530 transitions. Word has length 9008
[2023-11-28 20:44:27,131 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:44:27,131 INFO  L495      AbstractCegarLoop]: Abstraction has 13530 states and 22530 transitions.
[2023-11-28 20:44:27,133 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1625.0) internal successors, (8125), 5 states have internal predecessors, (8125), 0 states have call successors, (0), 0 states 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 20:44:27,133 INFO  L276                IsEmpty]: Start isEmpty. Operand 13530 states and 22530 transitions.
[2023-11-28 20:44:27,481 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9010
[2023-11-28 20:44:27,481 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:44:27,484 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:44:27,610 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0
[2023-11-28 20:44:27,684 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2023-11-28 20:44:27,685 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:44:27,685 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:44:27,687 INFO  L85        PathProgramCache]: Analyzing trace with hash 1018824795, now seen corresponding path program 1 times
[2023-11-28 20:44:27,687 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:44:27,687 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273645589]
[2023-11-28 20:44:27,688 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:44:27,689 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:44:28,604 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:44:28,604 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [678426157]
[2023-11-28 20:44:28,606 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:44:28,606 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:44:28,606 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:44:28,607 INFO  L229       MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:44:28,608 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2023-11-28 20:44:41,222 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:44:41,514 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45363 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:44:41,631 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:44:42,661 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 30 proven. 675 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked.
[2023-11-28 20:44:42,661 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:44:42,851 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked.
[2023-11-28 20:44:42,852 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:44:42,852 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273645589]
[2023-11-28 20:44:42,852 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:44:42,852 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678426157]
[2023-11-28 20:44:42,852 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [678426157] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:44:42,852 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:44:42,859 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:44:42,859 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908729302]
[2023-11-28 20:44:42,859 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:44:42,864 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:44:42,864 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:44:42,868 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:44:42,868 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:44:42,871 INFO  L87              Difference]: Start difference. First operand 13530 states and 22530 transitions. Second operand  has 5 states, 5 states have (on average 1625.6) internal successors, (8128), 5 states have internal predecessors, (8128), 0 states have call successors, (0), 0 states 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 20:44:58,701 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:44:58,702 INFO  L93              Difference]: Finished difference Result 47229 states and 78235 transitions.
[2023-11-28 20:44:58,702 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:44:58,704 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1625.6) internal successors, (8128), 5 states have internal predecessors, (8128), 0 states have call successors, (0), 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 9009
[2023-11-28 20:44:58,709 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:44:58,726 INFO  L225             Difference]: With dead ends: 47229
[2023-11-28 20:44:58,726 INFO  L226             Difference]: Without dead ends: 25132
[2023-11-28 20:44:58,733 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18017 GetRequests, 18008 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:44:58,734 INFO  L413           NwaCegarLoop]: 32021 mSDtfsCounter, 50638 mSDsluCounter, 31830 mSDsCounter, 0 mSdLazyCounter, 16938 mSolverCounterSat, 1216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50638 SdHoareTripleChecker+Valid, 63851 SdHoareTripleChecker+Invalid, 18154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1216 IncrementalHoareTripleChecker+Valid, 16938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time
[2023-11-28 20:44:58,734 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50638 Valid, 63851 Invalid, 18154 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1216 Valid, 16938 Invalid, 0 Unknown, 0 Unchecked, 15.0s Time]
[2023-11-28 20:44:58,756 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25132 states.
[2023-11-28 20:44:58,899 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25132 to 13532.
[2023-11-28 20:44:58,913 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13532 states, 13531 states have (on average 1.6652132141009535) internal successors, (22532), 13531 states have internal predecessors, (22532), 0 states have call successors, (0), 0 states 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 20:44:58,937 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13532 states to 13532 states and 22532 transitions.
[2023-11-28 20:44:58,937 INFO  L78                 Accepts]: Start accepts. Automaton has 13532 states and 22532 transitions. Word has length 9009
[2023-11-28 20:44:58,944 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:44:58,944 INFO  L495      AbstractCegarLoop]: Abstraction has 13532 states and 22532 transitions.
[2023-11-28 20:44:58,946 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1625.6) internal successors, (8128), 5 states have internal predecessors, (8128), 0 states have call successors, (0), 0 states 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 20:44:58,946 INFO  L276                IsEmpty]: Start isEmpty. Operand 13532 states and 22532 transitions.
[2023-11-28 20:44:59,323 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9011
[2023-11-28 20:44:59,323 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:44:59,325 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:44:59,452 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0
[2023-11-28 20:44:59,525 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2023-11-28 20:44:59,526 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:44:59,526 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:44:59,527 INFO  L85        PathProgramCache]: Analyzing trace with hash 1106341373, now seen corresponding path program 1 times
[2023-11-28 20:44:59,527 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:44:59,528 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469107824]
[2023-11-28 20:44:59,528 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:44:59,529 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:45:00,456 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:45:00,457 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [4715873]
[2023-11-28 20:45:00,458 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:45:00,458 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:45:00,459 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:45:00,459 INFO  L229       MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:45:00,460 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2023-11-28 20:45:12,751 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:45:13,057 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45366 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:45:13,215 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:45:14,502 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 32 proven. 675 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked.
[2023-11-28 20:45:14,502 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:45:14,685 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked.
[2023-11-28 20:45:14,686 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:45:14,686 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469107824]
[2023-11-28 20:45:14,686 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:45:14,686 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4715873]
[2023-11-28 20:45:14,686 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [4715873] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:45:14,686 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:45:14,693 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:45:14,693 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531315101]
[2023-11-28 20:45:14,693 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:45:14,698 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:45:14,698 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:45:14,702 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:45:14,702 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:45:14,704 INFO  L87              Difference]: Start difference. First operand 13532 states and 22532 transitions. Second operand  has 5 states, 5 states have (on average 1626.2) internal successors, (8131), 5 states have internal predecessors, (8131), 0 states have call successors, (0), 0 states 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 20:45:32,228 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:45:32,228 INFO  L93              Difference]: Finished difference Result 47237 states and 78243 transitions.
[2023-11-28 20:45:32,229 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:45:32,230 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1626.2) internal successors, (8131), 5 states have internal predecessors, (8131), 0 states have call successors, (0), 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 9010
[2023-11-28 20:45:32,236 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:45:32,257 INFO  L225             Difference]: With dead ends: 47237
[2023-11-28 20:45:32,257 INFO  L226             Difference]: Without dead ends: 25133
[2023-11-28 20:45:32,267 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18019 GetRequests, 18010 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:45:32,268 INFO  L413           NwaCegarLoop]: 32013 mSDtfsCounter, 34969 mSDsluCounter, 48517 mSDsCounter, 0 mSdLazyCounter, 22682 mSolverCounterSat, 1216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34969 SdHoareTripleChecker+Valid, 80530 SdHoareTripleChecker+Invalid, 23898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1216 IncrementalHoareTripleChecker+Valid, 22682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.6s IncrementalHoareTripleChecker+Time
[2023-11-28 20:45:32,268 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34969 Valid, 80530 Invalid, 23898 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1216 Valid, 22682 Invalid, 0 Unknown, 0 Unchecked, 16.6s Time]
[2023-11-28 20:45:32,292 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25133 states.
[2023-11-28 20:45:32,435 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25133 to 13534.
[2023-11-28 20:45:32,447 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13534 states, 13533 states have (on average 1.6651149043079878) internal successors, (22534), 13533 states have internal predecessors, (22534), 0 states have call successors, (0), 0 states 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 20:45:32,464 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13534 states to 13534 states and 22534 transitions.
[2023-11-28 20:45:32,464 INFO  L78                 Accepts]: Start accepts. Automaton has 13534 states and 22534 transitions. Word has length 9010
[2023-11-28 20:45:32,469 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:45:32,470 INFO  L495      AbstractCegarLoop]: Abstraction has 13534 states and 22534 transitions.
[2023-11-28 20:45:32,471 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1626.2) internal successors, (8131), 5 states have internal predecessors, (8131), 0 states have call successors, (0), 0 states 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 20:45:32,471 INFO  L276                IsEmpty]: Start isEmpty. Operand 13534 states and 22534 transitions.
[2023-11-28 20:45:32,906 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9012
[2023-11-28 20:45:32,906 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:45:32,907 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:45:33,038 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0
[2023-11-28 20:45:33,108 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16
[2023-11-28 20:45:33,108 INFO  L420      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:45:33,109 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:45:33,110 INFO  L85        PathProgramCache]: Analyzing trace with hash 1551611957, now seen corresponding path program 1 times
[2023-11-28 20:45:33,111 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:45:33,111 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985604948]
[2023-11-28 20:45:33,112 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:45:33,112 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:45:34,143 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:45:34,143 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113725092]
[2023-11-28 20:45:34,145 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:45:34,145 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:45:34,145 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:45:34,146 INFO  L229       MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:45:34,148 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2023-11-28 20:45:46,547 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:45:46,847 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45369 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 20:45:46,969 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:45:48,057 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 34 proven. 675 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked.
[2023-11-28 20:45:48,057 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:45:48,269 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 878 trivial. 0 not checked.
[2023-11-28 20:45:48,269 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:45:48,269 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985604948]
[2023-11-28 20:45:48,269 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:45:48,269 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113725092]
[2023-11-28 20:45:48,269 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113725092] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:45:48,270 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:45:48,276 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12
[2023-11-28 20:45:48,276 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631383995]
[2023-11-28 20:45:48,276 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:45:48,280 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-28 20:45:48,280 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:45:48,285 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-28 20:45:48,285 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132
[2023-11-28 20:45:48,287 INFO  L87              Difference]: Start difference. First operand 13534 states and 22534 transitions. Second operand  has 6 states, 6 states have (on average 1355.6666666666667) internal successors, (8134), 6 states have internal predecessors, (8134), 0 states have call successors, (0), 0 states 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 20:46:20,957 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:46:20,957 INFO  L93              Difference]: Finished difference Result 58927 states and 97699 transitions.
[2023-11-28 20:46:20,957 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-11-28 20:46:20,959 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 1355.6666666666667) internal successors, (8134), 6 states have internal predecessors, (8134), 0 states have call successors, (0), 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 9011
[2023-11-28 20:46:20,965 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:46:20,992 INFO  L225             Difference]: With dead ends: 58927
[2023-11-28 20:46:20,992 INFO  L226             Difference]: Without dead ends: 36816
[2023-11-28 20:46:21,004 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18022 GetRequests, 18010 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 20:46:21,004 INFO  L413           NwaCegarLoop]: 32007 mSDtfsCounter, 54314 mSDsluCounter, 108639 mSDsCounter, 0 mSdLazyCounter, 46689 mSolverCounterSat, 1218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54314 SdHoareTripleChecker+Valid, 140646 SdHoareTripleChecker+Invalid, 47907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.5s SdHoareTripleChecker+Time, 1218 IncrementalHoareTripleChecker+Valid, 46689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.0s IncrementalHoareTripleChecker+Time
[2023-11-28 20:46:21,004 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [54314 Valid, 140646 Invalid, 47907 Unknown, 0 Unchecked, 0.5s Time], IncrementalHoareTripleChecker [1218 Valid, 46689 Invalid, 0 Unknown, 0 Unchecked, 31.0s Time]
[2023-11-28 20:46:21,035 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 36816 states.
[2023-11-28 20:46:21,209 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 36816 to 13536.
[2023-11-28 20:46:21,221 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13536 states, 13535 states have (on average 1.665016623568526) internal successors, (22536), 13535 states have internal predecessors, (22536), 0 states have call successors, (0), 0 states 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 20:46:21,238 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13536 states to 13536 states and 22536 transitions.
[2023-11-28 20:46:21,238 INFO  L78                 Accepts]: Start accepts. Automaton has 13536 states and 22536 transitions. Word has length 9011
[2023-11-28 20:46:21,244 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:46:21,244 INFO  L495      AbstractCegarLoop]: Abstraction has 13536 states and 22536 transitions.
[2023-11-28 20:46:21,245 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 1355.6666666666667) internal successors, (8134), 6 states have internal predecessors, (8134), 0 states have call successors, (0), 0 states 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 20:46:21,245 INFO  L276                IsEmpty]: Start isEmpty. Operand 13536 states and 22536 transitions.
[2023-11-28 20:46:21,602 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9013
[2023-11-28 20:46:21,602 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:46:21,604 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:46:21,729 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0
[2023-11-28 20:46:21,804 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17
[2023-11-28 20:46:21,805 INFO  L420      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:46:21,806 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:46:21,807 INFO  L85        PathProgramCache]: Analyzing trace with hash -330966237, now seen corresponding path program 1 times
[2023-11-28 20:46:21,807 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:46:21,807 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938012492]
[2023-11-28 20:46:21,808 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:46:21,808 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:46:22,872 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:46:22,873 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1032277643]
[2023-11-28 20:46:22,874 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:46:22,874 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:46:22,874 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:46:22,875 INFO  L229       MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:46:22,876 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process
[2023-11-28 20:46:35,011 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:46:35,320 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45372 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:46:35,441 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:46:36,625 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 36 proven. 675 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked.
[2023-11-28 20:46:36,625 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:46:36,821 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked.
[2023-11-28 20:46:36,821 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:46:36,821 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938012492]
[2023-11-28 20:46:36,821 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:46:36,821 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032277643]
[2023-11-28 20:46:36,822 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032277643] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:46:36,822 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:46:36,828 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:46:36,828 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399222701]
[2023-11-28 20:46:36,828 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:46:36,832 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:46:36,832 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:46:36,837 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:46:36,837 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:46:36,839 INFO  L87              Difference]: Start difference. First operand 13536 states and 22536 transitions. Second operand  has 5 states, 5 states have (on average 1627.4) internal successors, (8137), 5 states have internal predecessors, (8137), 0 states have call successors, (0), 0 states 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 20:46:53,682 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:46:53,683 INFO  L93              Difference]: Finished difference Result 47253 states and 78259 transitions.
[2023-11-28 20:46:53,683 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:46:53,684 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1627.4) internal successors, (8137), 5 states have internal predecessors, (8137), 0 states have call successors, (0), 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 9012
[2023-11-28 20:46:53,690 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:46:53,709 INFO  L225             Difference]: With dead ends: 47253
[2023-11-28 20:46:53,709 INFO  L226             Difference]: Without dead ends: 25135
[2023-11-28 20:46:53,718 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18023 GetRequests, 18014 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:46:53,718 INFO  L413           NwaCegarLoop]: 31997 mSDtfsCounter, 34973 mSDsluCounter, 46249 mSDsCounter, 0 mSdLazyCounter, 21806 mSolverCounterSat, 1216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34973 SdHoareTripleChecker+Valid, 78246 SdHoareTripleChecker+Invalid, 23022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1216 IncrementalHoareTripleChecker+Valid, 21806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time
[2023-11-28 20:46:53,719 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34973 Valid, 78246 Invalid, 23022 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1216 Valid, 21806 Invalid, 0 Unknown, 0 Unchecked, 16.0s Time]
[2023-11-28 20:46:53,742 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25135 states.
[2023-11-28 20:46:53,885 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25135 to 13538.
[2023-11-28 20:46:53,897 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13538 states, 13537 states have (on average 1.6649183718696905) internal successors, (22538), 13537 states have internal predecessors, (22538), 0 states have call successors, (0), 0 states 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 20:46:53,914 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13538 states to 13538 states and 22538 transitions.
[2023-11-28 20:46:53,914 INFO  L78                 Accepts]: Start accepts. Automaton has 13538 states and 22538 transitions. Word has length 9012
[2023-11-28 20:46:53,919 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:46:53,919 INFO  L495      AbstractCegarLoop]: Abstraction has 13538 states and 22538 transitions.
[2023-11-28 20:46:53,921 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1627.4) internal successors, (8137), 5 states have internal predecessors, (8137), 0 states have call successors, (0), 0 states 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 20:46:53,921 INFO  L276                IsEmpty]: Start isEmpty. Operand 13538 states and 22538 transitions.
[2023-11-28 20:46:54,276 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9014
[2023-11-28 20:46:54,276 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:46:54,278 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 20:46:54,402 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0
[2023-11-28 20:46:54,478 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:46:54,478 INFO  L420      AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:46:54,479 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:46:54,480 INFO  L85        PathProgramCache]: Analyzing trace with hash -1059774319, now seen corresponding path program 1 times
[2023-11-28 20:46:54,480 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:46:54,480 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498821485]
[2023-11-28 20:46:54,481 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:46:54,481 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:46:55,390 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:46:55,390 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [489158287]
[2023-11-28 20:46:55,392 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:46:55,392 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:46:55,392 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:46:55,393 INFO  L229       MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:46:55,394 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process
[2023-11-28 20:47:07,910 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:47:08,206 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45376 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:47:08,379 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:47:09,410 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 38 proven. 675 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked.
[2023-11-28 20:47:09,411 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:47:09,588 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked.
[2023-11-28 20:47:09,589 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:47:09,589 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498821485]
[2023-11-28 20:47:09,589 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:47:09,589 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489158287]
[2023-11-28 20:47:09,589 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [489158287] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:47:09,589 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:47:09,596 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:47:09,596 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698101774]
[2023-11-28 20:47:09,596 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:47:09,600 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:47:09,600 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:47:09,604 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:47:09,604 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:47:09,606 INFO  L87              Difference]: Start difference. First operand 13538 states and 22538 transitions. Second operand  has 5 states, 5 states have (on average 1628.0) internal successors, (8140), 5 states have internal predecessors, (8140), 0 states have call successors, (0), 0 states 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 20:47:24,670 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:47:24,670 INFO  L93              Difference]: Finished difference Result 47261 states and 78267 transitions.
[2023-11-28 20:47:24,670 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:47:24,672 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1628.0) internal successors, (8140), 5 states have internal predecessors, (8140), 0 states have call successors, (0), 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 9013
[2023-11-28 20:47:24,678 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:47:24,698 INFO  L225             Difference]: With dead ends: 47261
[2023-11-28 20:47:24,698 INFO  L226             Difference]: Without dead ends: 25136
[2023-11-28 20:47:24,708 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18025 GetRequests, 18016 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:47:24,709 INFO  L413           NwaCegarLoop]: 31989 mSDtfsCounter, 50619 mSDsluCounter, 31809 mSDsCounter, 0 mSdLazyCounter, 16938 mSolverCounterSat, 1216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50619 SdHoareTripleChecker+Valid, 63798 SdHoareTripleChecker+Invalid, 18154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1216 IncrementalHoareTripleChecker+Valid, 16938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time
[2023-11-28 20:47:24,709 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50619 Valid, 63798 Invalid, 18154 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1216 Valid, 16938 Invalid, 0 Unknown, 0 Unchecked, 14.2s Time]
[2023-11-28 20:47:24,735 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25136 states.
[2023-11-28 20:47:24,880 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25136 to 13540.
[2023-11-28 20:47:24,892 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13540 states, 13539 states have (on average 1.6648201491986114) internal successors, (22540), 13539 states have internal predecessors, (22540), 0 states have call successors, (0), 0 states 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 20:47:24,909 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13540 states to 13540 states and 22540 transitions.
[2023-11-28 20:47:24,909 INFO  L78                 Accepts]: Start accepts. Automaton has 13540 states and 22540 transitions. Word has length 9013
[2023-11-28 20:47:24,914 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:47:24,915 INFO  L495      AbstractCegarLoop]: Abstraction has 13540 states and 22540 transitions.
[2023-11-28 20:47:24,916 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1628.0) internal successors, (8140), 5 states have internal predecessors, (8140), 0 states have call successors, (0), 0 states 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 20:47:24,916 INFO  L276                IsEmpty]: Start isEmpty. Operand 13540 states and 22540 transitions.
[2023-11-28 20:47:25,235 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9015
[2023-11-28 20:47:25,235 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:47:25,236 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 20:47:25,362 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0
[2023-11-28 20:47:25,437 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:47:25,437 INFO  L420      AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:47:25,438 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:47:25,440 INFO  L85        PathProgramCache]: Analyzing trace with hash -1484434229, now seen corresponding path program 1 times
[2023-11-28 20:47:25,440 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:47:25,440 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763866584]
[2023-11-28 20:47:25,442 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:47:25,443 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:47:26,373 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:47:26,373 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1207121476]
[2023-11-28 20:47:26,375 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:47:26,375 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:47:26,375 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:47:26,376 INFO  L229       MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:47:26,377 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process
[2023-11-28 20:47:38,707 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:47:39,018 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45379 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 20:47:39,191 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:47:40,242 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 40 proven. 675 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked.
[2023-11-28 20:47:40,242 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:47:40,732 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 872 trivial. 0 not checked.
[2023-11-28 20:47:40,732 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:47:40,733 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763866584]
[2023-11-28 20:47:40,733 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:47:40,733 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207121476]
[2023-11-28 20:47:40,733 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207121476] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:47:40,733 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:47:40,739 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12
[2023-11-28 20:47:40,739 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000790246]
[2023-11-28 20:47:40,740 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:47:40,744 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-28 20:47:40,744 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:47:40,747 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-28 20:47:40,747 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132
[2023-11-28 20:47:40,749 INFO  L87              Difference]: Start difference. First operand 13540 states and 22540 transitions. Second operand  has 6 states, 6 states have (on average 1357.1666666666667) internal successors, (8143), 6 states have internal predecessors, (8143), 0 states have call successors, (0), 0 states 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 20:48:09,319 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:48:09,319 INFO  L93              Difference]: Finished difference Result 58966 states and 97744 transitions.
[2023-11-28 20:48:09,320 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-11-28 20:48:09,321 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 1357.1666666666667) internal successors, (8143), 6 states have internal predecessors, (8143), 0 states have call successors, (0), 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 9014
[2023-11-28 20:48:09,327 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:48:09,352 INFO  L225             Difference]: With dead ends: 58966
[2023-11-28 20:48:09,353 INFO  L226             Difference]: Without dead ends: 36834
[2023-11-28 20:48:09,363 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18028 GetRequests, 18016 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 20:48:09,363 INFO  L413           NwaCegarLoop]: 31983 mSDtfsCounter, 69963 mSDsluCounter, 77438 mSDsCounter, 0 mSdLazyCounter, 36076 mSolverCounterSat, 1219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69963 SdHoareTripleChecker+Valid, 109421 SdHoareTripleChecker+Invalid, 37295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 1219 IncrementalHoareTripleChecker+Valid, 36076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.2s IncrementalHoareTripleChecker+Time
[2023-11-28 20:48:09,364 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [69963 Valid, 109421 Invalid, 37295 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [1219 Valid, 36076 Invalid, 0 Unknown, 0 Unchecked, 27.2s Time]
[2023-11-28 20:48:09,394 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 36834 states.
[2023-11-28 20:48:09,559 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 36834 to 13542.
[2023-11-28 20:48:09,572 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13542 states, 13541 states have (on average 1.6647219555424266) internal successors, (22542), 13541 states have internal predecessors, (22542), 0 states have call successors, (0), 0 states 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 20:48:09,588 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13542 states to 13542 states and 22542 transitions.
[2023-11-28 20:48:09,588 INFO  L78                 Accepts]: Start accepts. Automaton has 13542 states and 22542 transitions. Word has length 9014
[2023-11-28 20:48:09,593 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:48:09,593 INFO  L495      AbstractCegarLoop]: Abstraction has 13542 states and 22542 transitions.
[2023-11-28 20:48:09,595 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 1357.1666666666667) internal successors, (8143), 6 states have internal predecessors, (8143), 0 states have call successors, (0), 0 states 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 20:48:09,595 INFO  L276                IsEmpty]: Start isEmpty. Operand 13542 states and 22542 transitions.
[2023-11-28 20:48:09,940 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9016
[2023-11-28 20:48:09,940 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:48:09,942 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:48:10,067 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0
[2023-11-28 20:48:10,142 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:48:10,143 INFO  L420      AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:48:10,144 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:48:10,145 INFO  L85        PathProgramCache]: Analyzing trace with hash 1675758699, now seen corresponding path program 1 times
[2023-11-28 20:48:10,145 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:48:10,146 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137037364]
[2023-11-28 20:48:10,146 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:48:10,146 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:48:11,057 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:48:11,058 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942236691]
[2023-11-28 20:48:11,059 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:48:11,059 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:48:11,059 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:48:11,060 INFO  L229       MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:48:11,061 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process
[2023-11-28 20:48:23,337 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:48:23,646 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45382 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:48:23,767 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:48:24,827 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 42 proven. 675 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked.
[2023-11-28 20:48:24,827 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:48:25,036 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked.
[2023-11-28 20:48:25,036 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:48:25,036 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137037364]
[2023-11-28 20:48:25,036 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:48:25,036 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942236691]
[2023-11-28 20:48:25,036 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942236691] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:48:25,036 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:48:25,043 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:48:25,043 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043701173]
[2023-11-28 20:48:25,043 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:48:25,048 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:48:25,048 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:48:25,051 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:48:25,052 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:48:25,054 INFO  L87              Difference]: Start difference. First operand 13542 states and 22542 transitions. Second operand  has 5 states, 5 states have (on average 1629.2) internal successors, (8146), 5 states have internal predecessors, (8146), 0 states have call successors, (0), 0 states 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 20:48:40,033 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:48:40,033 INFO  L93              Difference]: Finished difference Result 47277 states and 78283 transitions.
[2023-11-28 20:48:40,034 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:48:40,035 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1629.2) internal successors, (8146), 5 states have internal predecessors, (8146), 0 states have call successors, (0), 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 9015
[2023-11-28 20:48:40,041 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:48:40,064 INFO  L225             Difference]: With dead ends: 47277
[2023-11-28 20:48:40,064 INFO  L226             Difference]: Without dead ends: 25138
[2023-11-28 20:48:40,077 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18029 GetRequests, 18020 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:48:40,078 INFO  L413           NwaCegarLoop]: 31973 mSDtfsCounter, 50584 mSDsluCounter, 31800 mSDsCounter, 0 mSdLazyCounter, 16938 mSolverCounterSat, 1216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50584 SdHoareTripleChecker+Valid, 63773 SdHoareTripleChecker+Invalid, 18154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1216 IncrementalHoareTripleChecker+Valid, 16938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time
[2023-11-28 20:48:40,078 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50584 Valid, 63773 Invalid, 18154 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1216 Valid, 16938 Invalid, 0 Unknown, 0 Unchecked, 14.2s Time]
[2023-11-28 20:48:40,104 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25138 states.
[2023-11-28 20:48:40,255 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25138 to 13544.
[2023-11-28 20:48:40,267 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13544 states, 13543 states have (on average 1.6646237908882817) internal successors, (22544), 13543 states have internal predecessors, (22544), 0 states have call successors, (0), 0 states 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 20:48:40,284 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13544 states to 13544 states and 22544 transitions.
[2023-11-28 20:48:40,284 INFO  L78                 Accepts]: Start accepts. Automaton has 13544 states and 22544 transitions. Word has length 9015
[2023-11-28 20:48:40,290 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:48:40,290 INFO  L495      AbstractCegarLoop]: Abstraction has 13544 states and 22544 transitions.
[2023-11-28 20:48:40,291 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1629.2) internal successors, (8146), 5 states have internal predecessors, (8146), 0 states have call successors, (0), 0 states 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 20:48:40,291 INFO  L276                IsEmpty]: Start isEmpty. Operand 13544 states and 22544 transitions.
[2023-11-28 20:48:40,697 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9017
[2023-11-28 20:48:40,697 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:48:40,698 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 20:48:40,825 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0
[2023-11-28 20:48:40,899 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:48:40,899 INFO  L420      AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:48:40,901 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:48:40,902 INFO  L85        PathProgramCache]: Analyzing trace with hash 772892145, now seen corresponding path program 1 times
[2023-11-28 20:48:40,902 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:48:40,902 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289843706]
[2023-11-28 20:48:40,903 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:48:40,903 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:48:41,806 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:48:41,806 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739931790]
[2023-11-28 20:48:41,808 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:48:41,808 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:48:41,808 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:48:41,809 INFO  L229       MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:48:41,810 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process
[2023-11-28 20:48:53,887 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:48:54,193 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45385 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:48:54,318 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:48:55,359 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 44 proven. 675 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked.
[2023-11-28 20:48:55,359 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:48:55,558 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 868 trivial. 0 not checked.
[2023-11-28 20:48:55,558 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:48:55,558 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289843706]
[2023-11-28 20:48:55,559 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:48:55,559 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739931790]
[2023-11-28 20:48:55,559 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739931790] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:48:55,559 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:48:55,564 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:48:55,564 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821349961]
[2023-11-28 20:48:55,564 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:48:55,568 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:48:55,568 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:48:55,573 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:48:55,573 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:48:55,575 INFO  L87              Difference]: Start difference. First operand 13544 states and 22544 transitions. Second operand  has 5 states, 5 states have (on average 1629.8) internal successors, (8149), 5 states have internal predecessors, (8149), 0 states have call successors, (0), 0 states 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 20:49:13,057 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:49:13,057 INFO  L93              Difference]: Finished difference Result 47285 states and 78291 transitions.
[2023-11-28 20:49:13,057 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:49:13,059 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1629.8) internal successors, (8149), 5 states have internal predecessors, (8149), 0 states have call successors, (0), 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 9016
[2023-11-28 20:49:13,066 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:49:13,095 INFO  L225             Difference]: With dead ends: 47285
[2023-11-28 20:49:13,095 INFO  L226             Difference]: Without dead ends: 25139
[2023-11-28 20:49:13,110 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18031 GetRequests, 18022 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:49:13,111 INFO  L413           NwaCegarLoop]: 31965 mSDtfsCounter, 34933 mSDsluCounter, 48457 mSDsCounter, 0 mSdLazyCounter, 22682 mSolverCounterSat, 1216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34933 SdHoareTripleChecker+Valid, 80422 SdHoareTripleChecker+Invalid, 23898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 1216 IncrementalHoareTripleChecker+Valid, 22682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time
[2023-11-28 20:49:13,112 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34933 Valid, 80422 Invalid, 23898 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [1216 Valid, 22682 Invalid, 0 Unknown, 0 Unchecked, 16.5s Time]
[2023-11-28 20:49:13,144 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25139 states.
[2023-11-28 20:49:13,300 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25139 to 13546.
[2023-11-28 20:49:13,312 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13546 states, 13545 states have (on average 1.6645256552233296) internal successors, (22546), 13545 states have internal predecessors, (22546), 0 states have call successors, (0), 0 states 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 20:49:13,328 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13546 states to 13546 states and 22546 transitions.
[2023-11-28 20:49:13,328 INFO  L78                 Accepts]: Start accepts. Automaton has 13546 states and 22546 transitions. Word has length 9016
[2023-11-28 20:49:13,334 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:49:13,334 INFO  L495      AbstractCegarLoop]: Abstraction has 13546 states and 22546 transitions.
[2023-11-28 20:49:13,335 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1629.8) internal successors, (8149), 5 states have internal predecessors, (8149), 0 states have call successors, (0), 0 states 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 20:49:13,335 INFO  L276                IsEmpty]: Start isEmpty. Operand 13546 states and 22546 transitions.
[2023-11-28 20:49:13,759 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9018
[2023-11-28 20:49:13,759 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:49:13,761 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:49:13,887 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0
[2023-11-28 20:49:13,961 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:49:13,962 INFO  L420      AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:49:13,963 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:49:13,964 INFO  L85        PathProgramCache]: Analyzing trace with hash -1820639801, now seen corresponding path program 1 times
[2023-11-28 20:49:13,964 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:49:13,965 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116118795]
[2023-11-28 20:49:13,965 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:49:13,966 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:49:14,873 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:49:14,874 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392427915]
[2023-11-28 20:49:14,875 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:49:14,875 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:49:14,875 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:49:14,876 INFO  L229       MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:49:14,877 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process
[2023-11-28 20:49:27,415 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:49:27,727 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45389 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:49:27,848 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:49:28,902 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 46 proven. 675 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked.
[2023-11-28 20:49:28,902 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:49:29,387 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked.
[2023-11-28 20:49:29,387 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:49:29,387 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116118795]
[2023-11-28 20:49:29,387 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:49:29,387 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392427915]
[2023-11-28 20:49:29,387 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [392427915] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:49:29,387 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:49:29,393 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:49:29,393 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676389568]
[2023-11-28 20:49:29,393 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:49:29,399 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:49:29,399 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:49:29,403 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:49:29,403 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:49:29,406 INFO  L87              Difference]: Start difference. First operand 13546 states and 22546 transitions. Second operand  has 5 states, 5 states have (on average 1630.4) internal successors, (8152), 5 states have internal predecessors, (8152), 0 states have call successors, (0), 0 states 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 20:49:44,589 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:49:44,589 INFO  L93              Difference]: Finished difference Result 47293 states and 78299 transitions.
[2023-11-28 20:49:44,589 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:49:44,592 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1630.4) internal successors, (8152), 5 states have internal predecessors, (8152), 0 states have call successors, (0), 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 9017
[2023-11-28 20:49:44,598 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:49:44,621 INFO  L225             Difference]: With dead ends: 47293
[2023-11-28 20:49:44,621 INFO  L226             Difference]: Without dead ends: 25140
[2023-11-28 20:49:44,635 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18033 GetRequests, 18024 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:49:44,635 INFO  L413           NwaCegarLoop]: 31957 mSDtfsCounter, 50587 mSDsluCounter, 31789 mSDsCounter, 0 mSdLazyCounter, 16938 mSolverCounterSat, 1216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50587 SdHoareTripleChecker+Valid, 63746 SdHoareTripleChecker+Invalid, 18154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1216 IncrementalHoareTripleChecker+Valid, 16938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time
[2023-11-28 20:49:44,636 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50587 Valid, 63746 Invalid, 18154 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1216 Valid, 16938 Invalid, 0 Unknown, 0 Unchecked, 14.4s Time]
[2023-11-28 20:49:44,666 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25140 states.
[2023-11-28 20:49:44,817 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25140 to 13548.
[2023-11-28 20:49:44,830 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13548 states, 13547 states have (on average 1.6644275485347308) internal successors, (22548), 13547 states have internal predecessors, (22548), 0 states have call successors, (0), 0 states 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 20:49:44,846 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13548 states to 13548 states and 22548 transitions.
[2023-11-28 20:49:44,846 INFO  L78                 Accepts]: Start accepts. Automaton has 13548 states and 22548 transitions. Word has length 9017
[2023-11-28 20:49:44,851 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:49:44,851 INFO  L495      AbstractCegarLoop]: Abstraction has 13548 states and 22548 transitions.
[2023-11-28 20:49:44,853 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1630.4) internal successors, (8152), 5 states have internal predecessors, (8152), 0 states have call successors, (0), 0 states 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 20:49:44,853 INFO  L276                IsEmpty]: Start isEmpty. Operand 13548 states and 22548 transitions.
[2023-11-28 20:49:45,353 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9019
[2023-11-28 20:49:45,353 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:49:45,355 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 20:49:45,481 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0
[2023-11-28 20:49:45,555 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23
[2023-11-28 20:49:45,556 INFO  L420      AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:49:45,557 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:49:45,558 INFO  L85        PathProgramCache]: Analyzing trace with hash -1064791911, now seen corresponding path program 1 times
[2023-11-28 20:49:45,558 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:49:45,558 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188369620]
[2023-11-28 20:49:45,559 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:49:45,559 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:49:46,480 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:49:46,480 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [756257374]
[2023-11-28 20:49:46,482 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:49:46,482 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:49:46,482 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:49:46,483 INFO  L229       MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:49:46,484 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45061b4-f98d-4351-a42a-062b24dba5a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process