./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.leader_election.6.prop1-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_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/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_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.leader_election.6.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/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_07e72545-467b-4036-b7b2-7d431637f060/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 aeaa4efd84060590d2c8b765be165579517eac3e7b977ddca95609f61d0428af
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-11-28 20:31:34,608 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-28 20:31:34,670 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-28 20:31:34,675 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-28 20:31:34,675 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-28 20:31:34,697 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-28 20:31:34,698 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-28 20:31:34,699 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-28 20:31:34,699 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-28 20:31:34,700 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-28 20:31:34,700 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-28 20:31:34,701 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-28 20:31:34,702 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-28 20:31:34,702 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-28 20:31:34,703 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-28 20:31:34,703 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-28 20:31:34,704 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-28 20:31:34,704 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-28 20:31:34,705 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-28 20:31:34,705 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-28 20:31:34,706 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-28 20:31:34,706 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-28 20:31:34,707 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-28 20:31:34,707 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-28 20:31:34,708 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-28 20:31:34,708 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-28 20:31:34,708 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-28 20:31:34,709 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-28 20:31:34,709 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-28 20:31:34,710 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-28 20:31:34,710 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-28 20:31:34,710 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-28 20:31:34,711 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-28 20:31:34,711 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-28 20:31:34,711 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-28 20:31:34,712 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-28 20:31:34,712 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-28 20:31:34,712 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-28 20:31:34,712 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-28 20:31:34,712 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_07e72545-467b-4036-b7b2-7d431637f060/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_07e72545-467b-4036-b7b2-7d431637f060/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 -> aeaa4efd84060590d2c8b765be165579517eac3e7b977ddca95609f61d0428af
[2023-11-28 20:31:34,916 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-28 20:31:34,942 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-28 20:31:34,944 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-28 20:31:34,945 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-28 20:31:34,946 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-28 20:31:34,947 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.leader_election.6.prop1-back-serstep.c
[2023-11-28 20:31:37,711 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-28 20:31:38,339 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-28 20:31:38,340 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.leader_election.6.prop1-back-serstep.c
[2023-11-28 20:31:38,413 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/data/d4ac106b2/b88fa62dae374d15a5b3ce2c67ed8990/FLAG2680535a7
[2023-11-28 20:31:38,424 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/data/d4ac106b2/b88fa62dae374d15a5b3ce2c67ed8990
[2023-11-28 20:31:38,427 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-28 20:31:38,428 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-28 20:31:38,429 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-28 20:31:38,429 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-28 20:31:38,433 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-28 20:31:38,434 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:31:38" (1/1) ...
[2023-11-28 20:31:38,435 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f5f8410 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:31:38, skipping insertion in model container
[2023-11-28 20:31:38,435 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:31:38" (1/1) ...
[2023-11-28 20:31:38,799 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-28 20:31:39,187 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_07e72545-467b-4036-b7b2-7d431637f060/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.leader_election.6.prop1-back-serstep.c[1183,1196]
[2023-11-28 20:31:41,529 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-28 20:31:41,542 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-28 20:31:41,555 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_07e72545-467b-4036-b7b2-7d431637f060/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.leader_election.6.prop1-back-serstep.c[1183,1196]
[2023-11-28 20:31:43,418 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-28 20:31:43,435 INFO  L206         MainTranslator]: Completed translation
[2023-11-28 20:31:43,436 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:31:43 WrapperNode
[2023-11-28 20:31:43,436 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-28 20:31:43,437 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-28 20:31:43,437 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-28 20:31:43,437 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-28 20:31:43,445 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:31:43" (1/1) ...
[2023-11-28 20:31:43,992 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:31:43" (1/1) ...
[2023-11-28 20:31:49,354 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 99202
[2023-11-28 20:31:49,354 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-28 20:31:49,355 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-28 20:31:49,355 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-28 20:31:49,355 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-28 20:31:49,363 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:31:43" (1/1) ...
[2023-11-28 20:31:49,363 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:31:43" (1/1) ...
[2023-11-28 20:31:50,889 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:31:43" (1/1) ...
[2023-11-28 20:31:51,355 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 20:31:51,356 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:31:43" (1/1) ...
[2023-11-28 20:31:51,356 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:31:43" (1/1) ...
[2023-11-28 20:31:52,729 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:31:43" (1/1) ...
[2023-11-28 20:31:52,950 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:31:43" (1/1) ...
[2023-11-28 20:31:53,203 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:31:43" (1/1) ...
[2023-11-28 20:31:53,391 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:31:43" (1/1) ...
[2023-11-28 20:31:54,310 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-28 20:31:54,311 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-28 20:31:54,311 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-28 20:31:54,311 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-28 20:31:54,312 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:31:43" (1/1) ...
[2023-11-28 20:31:54,317 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-28 20:31:54,327 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:31:54,339 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2023-11-28 20:31:54,340 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2023-11-28 20:31:54,371 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-28 20:31:54,371 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-11-28 20:31:54,372 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-28 20:31:54,372 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-28 20:31:58,250 INFO  L241             CfgBuilder]: Building ICFG
[2023-11-28 20:31:58,252 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-28 20:32:36,357 INFO  L282             CfgBuilder]: Performing block encoding
[2023-11-28 20:32:37,480 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-28 20:32:37,480 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-28 20:32:37,487 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:32:37 BoogieIcfgContainer
[2023-11-28 20:32:37,488 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-28 20:32:37,490 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-28 20:32:37,490 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-28 20:32:37,493 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-28 20:32:37,494 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:31:38" (1/3) ...
[2023-11-28 20:32:37,494 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22e626b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:32:37, skipping insertion in model container
[2023-11-28 20:32:37,494 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:31:43" (2/3) ...
[2023-11-28 20:32:37,495 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22e626b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:32:37, skipping insertion in model container
[2023-11-28 20:32:37,495 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:32:37" (3/3) ...
[2023-11-28 20:32:37,496 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.leader_election.6.prop1-back-serstep.c
[2023-11-28 20:32:37,509 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-28 20:32:37,510 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-28 20:32:37,754 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-28 20:32:37,760 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;@5c94e6c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-28 20:32:37,760 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-28 20:32:37,809 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 21089 states, 21087 states have (on average 1.6683738796414853) internal successors, (35181), 21088 states have internal predecessors, (35181), 0 states have call successors, (0), 0 states 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 20:32:37,922 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2375
[2023-11-28 20:32:37,922 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:32:37,924 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:32:37,925 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:32:37,928 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:32:37,930 INFO  L85        PathProgramCache]: Analyzing trace with hash 1571253427, now seen corresponding path program 1 times
[2023-11-28 20:32:37,937 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:32:37,937 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443293574]
[2023-11-28 20:32:37,938 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:32:37,938 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:32:40,483 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:32:48,526 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 20:32:48,526 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:32:48,527 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443293574]
[2023-11-28 20:32:48,527 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443293574] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:32:48,527 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:32:48,528 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:32:48,530 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741921068]
[2023-11-28 20:32:48,530 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:32:48,540 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:32:48,540 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:32:48,574 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:32:48,574 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:32:48,614 INFO  L87              Difference]: Start difference. First operand  has 21089 states, 21087 states have (on average 1.6683738796414853) internal successors, (35181), 21088 states have internal predecessors, (35181), 0 states have call successors, (0), 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 593.5) internal successors, (2374), 4 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states 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 20:32:49,668 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:32:49,668 INFO  L93              Difference]: Finished difference Result 41196 states and 68728 transitions.
[2023-11-28 20:32:49,669 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:32:49,671 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 593.5) internal successors, (2374), 4 states have internal predecessors, (2374), 0 states have call successors, (0), 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 2374
[2023-11-28 20:32:49,683 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:32:49,806 INFO  L225             Difference]: With dead ends: 41196
[2023-11-28 20:32:49,806 INFO  L226             Difference]: Without dead ends: 21089
[2023-11-28 20:32:49,838 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 20:32:49,841 INFO  L413           NwaCegarLoop]: 35174 mSDtfsCounter, 1 mSDsluCounter, 70343 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 105517 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:32:49,842 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 105517 Invalid, 13 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 20:32:49,903 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21089 states.
[2023-11-28 20:32:50,305 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21089 to 21089.
[2023-11-28 20:32:50,345 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 21089 states, 21088 states have (on average 1.6681999241274659) internal successors, (35179), 21088 states have internal predecessors, (35179), 0 states have call successors, (0), 0 states 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 20:32:50,473 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21089 states to 21089 states and 35179 transitions.
[2023-11-28 20:32:50,474 INFO  L78                 Accepts]: Start accepts. Automaton has 21089 states and 35179 transitions. Word has length 2374
[2023-11-28 20:32:50,479 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:32:50,479 INFO  L495      AbstractCegarLoop]: Abstraction has 21089 states and 35179 transitions.
[2023-11-28 20:32:50,480 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 593.5) internal successors, (2374), 4 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states 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 20:32:50,481 INFO  L276                IsEmpty]: Start isEmpty. Operand 21089 states and 35179 transitions.
[2023-11-28 20:32:50,667 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2376
[2023-11-28 20:32:50,668 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:32:50,669 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:32:50,670 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-28 20:32:50,670 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:32:50,671 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:32:50,672 INFO  L85        PathProgramCache]: Analyzing trace with hash 1465955149, now seen corresponding path program 1 times
[2023-11-28 20:32:50,672 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:32:50,673 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223513316]
[2023-11-28 20:32:50,674 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:32:50,674 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:32:52,329 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:32:56,982 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 20:32:56,982 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:32:56,982 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223513316]
[2023-11-28 20:32:56,983 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223513316] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:32:56,983 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:32:56,984 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:32:56,984 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935416829]
[2023-11-28 20:32:56,984 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:32:56,988 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:32:56,989 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:32:56,992 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:32:56,992 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:32:56,993 INFO  L87              Difference]: Start difference. First operand 21089 states and 35179 transitions. Second operand  has 4 states, 4 states have (on average 593.75) internal successors, (2375), 4 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states 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 20:32:58,019 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:32:58,019 INFO  L93              Difference]: Finished difference Result 41199 states and 68726 transitions.
[2023-11-28 20:32:58,020 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:32:58,021 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 593.75) internal successors, (2375), 4 states have internal predecessors, (2375), 0 states have call successors, (0), 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 2375
[2023-11-28 20:32:58,029 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:32:58,082 INFO  L225             Difference]: With dead ends: 41199
[2023-11-28 20:32:58,082 INFO  L226             Difference]: Without dead ends: 21092
[2023-11-28 20:32:58,109 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 20:32:58,110 INFO  L413           NwaCegarLoop]: 35174 mSDtfsCounter, 1 mSDsluCounter, 70341 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 105515 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-11-28 20:32:58,111 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 105515 Invalid, 15 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-11-28 20:32:58,147 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21092 states.
[2023-11-28 20:32:58,482 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21092 to 21091.
[2023-11-28 20:32:58,509 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 21091 states, 21090 states have (on average 1.6681365576102418) internal successors, (35181), 21090 states have internal predecessors, (35181), 0 states have call successors, (0), 0 states 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 20:32:58,551 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21091 states to 21091 states and 35181 transitions.
[2023-11-28 20:32:58,552 INFO  L78                 Accepts]: Start accepts. Automaton has 21091 states and 35181 transitions. Word has length 2375
[2023-11-28 20:32:58,556 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:32:58,556 INFO  L495      AbstractCegarLoop]: Abstraction has 21091 states and 35181 transitions.
[2023-11-28 20:32:58,557 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 593.75) internal successors, (2375), 4 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states 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 20:32:58,557 INFO  L276                IsEmpty]: Start isEmpty. Operand 21091 states and 35181 transitions.
[2023-11-28 20:32:58,779 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2377
[2023-11-28 20:32:58,779 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:32:58,781 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:32:58,781 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-28 20:32:58,782 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:32:58,782 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:32:58,784 INFO  L85        PathProgramCache]: Analyzing trace with hash -2010448883, now seen corresponding path program 1 times
[2023-11-28 20:32:58,784 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:32:58,784 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143920427]
[2023-11-28 20:32:58,785 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:32:58,785 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:33:00,043 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:33:07,531 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 20:33:07,532 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:33:07,532 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143920427]
[2023-11-28 20:33:07,532 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143920427] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:33:07,532 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:33:07,533 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:33:07,533 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493012798]
[2023-11-28 20:33:07,534 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:33:07,536 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:33:07,537 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:33:07,539 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:33:07,540 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-28 20:33:07,541 INFO  L87              Difference]: Start difference. First operand 21091 states and 35181 transitions. Second operand  has 5 states, 5 states have (on average 475.2) internal successors, (2376), 4 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states 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 20:33:09,048 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:33:09,048 INFO  L93              Difference]: Finished difference Result 63870 states and 106541 transitions.
[2023-11-28 20:33:09,048 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:33:09,049 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 475.2) internal successors, (2376), 4 states have internal predecessors, (2376), 0 states have call successors, (0), 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 2376
[2023-11-28 20:33:09,052 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:33:09,107 INFO  L225             Difference]: With dead ends: 63870
[2023-11-28 20:33:09,107 INFO  L226             Difference]: Without dead ends: 43761
[2023-11-28 20:33:09,129 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 20:33:09,130 INFO  L413           NwaCegarLoop]: 39453 mSDtfsCounter, 137689 mSDsluCounter, 70342 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137689 SdHoareTripleChecker+Valid, 109795 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-11-28 20:33:09,130 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [137689 Valid, 109795 Invalid, 16 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-11-28 20:33:09,255 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 43761 states.
[2023-11-28 20:33:09,661 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 43761 to 23661.
[2023-11-28 20:33:09,691 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 23661 states, 23660 states have (on average 1.667920540997464) internal successors, (39463), 23660 states have internal predecessors, (39463), 0 states have call successors, (0), 0 states 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 20:33:09,729 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23661 states to 23661 states and 39463 transitions.
[2023-11-28 20:33:09,729 INFO  L78                 Accepts]: Start accepts. Automaton has 23661 states and 39463 transitions. Word has length 2376
[2023-11-28 20:33:09,734 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:33:09,734 INFO  L495      AbstractCegarLoop]: Abstraction has 23661 states and 39463 transitions.
[2023-11-28 20:33:09,735 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 475.2) internal successors, (2376), 4 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states 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 20:33:09,735 INFO  L276                IsEmpty]: Start isEmpty. Operand 23661 states and 39463 transitions.
[2023-11-28 20:33:11,059 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15600
[2023-11-28 20:33:11,060 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:33:11,072 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 20:33:11,073 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-28 20:33:11,073 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:33:11,073 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:33:11,080 INFO  L85        PathProgramCache]: Analyzing trace with hash -1668108681, now seen corresponding path program 1 times
[2023-11-28 20:33:11,081 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:33:11,081 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583293483]
[2023-11-28 20:33:11,084 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:33:11,084 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:33:12,772 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:33:12,773 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781381779]
[2023-11-28 20:33:12,777 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:33:12,777 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:33:12,778 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:33:12,779 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:33:12,783 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-28 20:33:45,378 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:33:45,916 INFO  L262         TraceCheckSpWp]: Trace formula consists of 83168 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-28 20:33:46,305 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:33:46,751 INFO  L134       CoverageAnalysis]: Checked inductivity of 1718 backedges. 1718 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:33:46,751 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:33:46,751 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:33:46,751 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583293483]
[2023-11-28 20:33:46,751 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:33:46,752 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781381779]
[2023-11-28 20:33:46,752 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781381779] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:33:46,752 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:33:46,756 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:33:46,756 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744066565]
[2023-11-28 20:33:46,757 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:33:46,770 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:33:46,771 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:33:46,782 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:33:46,782 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:33:46,786 INFO  L87              Difference]: Start difference. First operand 23661 states and 39463 transitions. Second operand  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 0 states 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 20:33:47,306 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:33:47,306 INFO  L93              Difference]: Finished difference Result 43780 states and 73024 transitions.
[2023-11-28 20:33:47,307 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:33:47,311 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 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 15599
[2023-11-28 20:33:47,315 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:33:47,356 INFO  L225             Difference]: With dead ends: 43780
[2023-11-28 20:33:47,356 INFO  L226             Difference]: Without dead ends: 23671
[2023-11-28 20:33:47,376 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 15598 GetRequests, 15596 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 20:33:47,377 INFO  L413           NwaCegarLoop]: 35174 mSDtfsCounter, 12 mSDsluCounter, 70338 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 105512 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:33:47,378 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 105512 Invalid, 18 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 20:33:47,420 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23671 states.
[2023-11-28 20:33:47,779 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23671 to 23663.
[2023-11-28 20:33:47,806 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 23663 states, 23662 states have (on average 1.6678640858760883) internal successors, (39465), 23662 states have internal predecessors, (39465), 0 states have call successors, (0), 0 states 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 20:33:47,857 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23663 states to 23663 states and 39465 transitions.
[2023-11-28 20:33:47,857 INFO  L78                 Accepts]: Start accepts. Automaton has 23663 states and 39465 transitions. Word has length 15599
[2023-11-28 20:33:47,864 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:33:47,864 INFO  L495      AbstractCegarLoop]: Abstraction has 23663 states and 39465 transitions.
[2023-11-28 20:33:47,870 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 0 states 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 20:33:47,870 INFO  L276                IsEmpty]: Start isEmpty. Operand 23663 states and 39465 transitions.
[2023-11-28 20:33:50,235 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15600
[2023-11-28 20:33:50,235 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:33:50,245 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 20:33:50,445 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forcibly destroying the process
[2023-11-28 20:33:50,460 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-28 20:33:50,460 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:33:50,460 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:33:50,461 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:33:50,470 INFO  L85        PathProgramCache]: Analyzing trace with hash -1585539387, now seen corresponding path program 1 times
[2023-11-28 20:33:50,470 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:33:50,470 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867575340]
[2023-11-28 20:33:50,472 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:33:50,473 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:33:52,633 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:33:52,634 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [380430548]
[2023-11-28 20:33:52,638 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:33:52,638 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:33:52,638 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:33:52,639 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:33:52,642 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-28 20:34:23,565 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:34:24,096 INFO  L262         TraceCheckSpWp]: Trace formula consists of 83169 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-28 20:34:24,355 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:34:24,749 INFO  L134       CoverageAnalysis]: Checked inductivity of 1718 backedges. 1718 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:34:24,749 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:34:24,749 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:34:24,750 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867575340]
[2023-11-28 20:34:24,750 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:34:24,750 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380430548]
[2023-11-28 20:34:24,750 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [380430548] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:34:24,750 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:34:24,754 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:34:24,754 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92263469]
[2023-11-28 20:34:24,754 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:34:24,773 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:34:24,773 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:34:24,790 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:34:24,790 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:34:24,795 INFO  L87              Difference]: Start difference. First operand 23663 states and 39465 transitions. Second operand  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 0 states 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 20:34:25,285 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:34:25,285 INFO  L93              Difference]: Finished difference Result 43783 states and 73026 transitions.
[2023-11-28 20:34:25,286 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:34:25,289 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 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 15599
[2023-11-28 20:34:25,292 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:34:25,312 INFO  L225             Difference]: With dead ends: 43783
[2023-11-28 20:34:25,312 INFO  L226             Difference]: Without dead ends: 23672
[2023-11-28 20:34:25,328 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 15598 GetRequests, 15596 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 20:34:25,329 INFO  L413           NwaCegarLoop]: 35174 mSDtfsCounter, 12 mSDsluCounter, 70338 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 105512 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:34:25,329 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 105512 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 20:34:25,356 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23672 states.
[2023-11-28 20:34:25,960 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23672 to 23664.
[2023-11-28 20:34:25,984 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 23664 states, 23663 states have (on average 1.6678358618940963) internal successors, (39466), 23663 states have internal predecessors, (39466), 0 states have call successors, (0), 0 states 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 20:34:26,017 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23664 states to 23664 states and 39466 transitions.
[2023-11-28 20:34:26,017 INFO  L78                 Accepts]: Start accepts. Automaton has 23664 states and 39466 transitions. Word has length 15599
[2023-11-28 20:34:26,021 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:34:26,021 INFO  L495      AbstractCegarLoop]: Abstraction has 23664 states and 39466 transitions.
[2023-11-28 20:34:26,024 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 0 states 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 20:34:26,024 INFO  L276                IsEmpty]: Start isEmpty. Operand 23664 states and 39466 transitions.
[2023-11-28 20:34:27,386 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15600
[2023-11-28 20:34:27,386 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:34:27,394 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 20:34:27,595 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forcibly destroying the process
[2023-11-28 20:34:27,599 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2023-11-28 20:34:27,600 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:34:27,600 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:34:27,600 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:34:27,607 INFO  L85        PathProgramCache]: Analyzing trace with hash -1417942509, now seen corresponding path program 1 times
[2023-11-28 20:34:27,608 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:34:27,608 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974263733]
[2023-11-28 20:34:27,611 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:34:27,611 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:34:28,996 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:34:28,997 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478436336]
[2023-11-28 20:34:28,999 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:34:28,999 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:34:29,000 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:34:29,001 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:34:29,001 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-28 20:34:59,790 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:35:00,314 INFO  L262         TraceCheckSpWp]: Trace formula consists of 83170 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-28 20:35:00,583 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:35:00,838 INFO  L134       CoverageAnalysis]: Checked inductivity of 1718 backedges. 1718 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:35:00,838 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:35:00,839 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:35:00,839 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974263733]
[2023-11-28 20:35:00,839 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:35:00,839 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478436336]
[2023-11-28 20:35:00,839 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478436336] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:35:00,839 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:35:00,844 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:35:00,844 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173672746]
[2023-11-28 20:35:00,844 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:35:00,855 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:35:00,855 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:35:00,866 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:35:00,866 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:35:00,870 INFO  L87              Difference]: Start difference. First operand 23664 states and 39466 transitions. Second operand  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 0 states 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 20:35:01,394 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:35:01,394 INFO  L93              Difference]: Finished difference Result 43785 states and 73028 transitions.
[2023-11-28 20:35:01,395 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:35:01,398 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 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 15599
[2023-11-28 20:35:01,400 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:35:01,414 INFO  L225             Difference]: With dead ends: 43785
[2023-11-28 20:35:01,414 INFO  L226             Difference]: Without dead ends: 23673
[2023-11-28 20:35:01,425 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 15598 GetRequests, 15596 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 20:35:01,426 INFO  L413           NwaCegarLoop]: 35174 mSDtfsCounter, 12 mSDsluCounter, 70338 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 105512 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:35:01,426 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 105512 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 20:35:01,450 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23673 states.
[2023-11-28 20:35:01,632 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23673 to 23665.
[2023-11-28 20:35:01,654 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 23665 states, 23664 states have (on average 1.6678076402974984) internal successors, (39467), 23664 states have internal predecessors, (39467), 0 states have call successors, (0), 0 states 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 20:35:01,688 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23665 states to 23665 states and 39467 transitions.
[2023-11-28 20:35:01,688 INFO  L78                 Accepts]: Start accepts. Automaton has 23665 states and 39467 transitions. Word has length 15599
[2023-11-28 20:35:01,692 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:35:01,692 INFO  L495      AbstractCegarLoop]: Abstraction has 23665 states and 39467 transitions.
[2023-11-28 20:35:01,695 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 0 states 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 20:35:01,695 INFO  L276                IsEmpty]: Start isEmpty. Operand 23665 states and 39467 transitions.
[2023-11-28 20:35:02,804 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15600
[2023-11-28 20:35:02,804 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:35:02,810 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 20:35:03,010 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forcibly destroying the process
[2023-11-28 20:35:03,022 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2023-11-28 20:35:03,022 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:35:03,022 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:35:03,023 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:35:03,028 INFO  L85        PathProgramCache]: Analyzing trace with hash 980009057, now seen corresponding path program 1 times
[2023-11-28 20:35:03,028 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:35:03,028 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614064129]
[2023-11-28 20:35:03,029 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:35:03,029 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:35:04,406 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:35:04,406 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206148317]
[2023-11-28 20:35:04,409 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:35:04,409 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:35:04,409 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:35:04,410 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:35:04,411 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-28 20:35:35,000 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:35:35,571 INFO  L262         TraceCheckSpWp]: Trace formula consists of 83171 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-28 20:35:35,829 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:35:36,167 INFO  L134       CoverageAnalysis]: Checked inductivity of 1718 backedges. 1718 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:35:36,167 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:35:36,167 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:35:36,168 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614064129]
[2023-11-28 20:35:36,168 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:35:36,168 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206148317]
[2023-11-28 20:35:36,168 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206148317] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:35:36,168 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:35:36,172 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:35:36,172 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050670097]
[2023-11-28 20:35:36,172 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:35:36,182 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:35:36,182 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:35:36,193 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:35:36,193 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:35:36,197 INFO  L87              Difference]: Start difference. First operand 23665 states and 39467 transitions. Second operand  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 0 states 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 20:35:36,653 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:35:36,653 INFO  L93              Difference]: Finished difference Result 43787 states and 73030 transitions.
[2023-11-28 20:35:36,654 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:35:36,657 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 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 15599
[2023-11-28 20:35:36,660 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:35:36,675 INFO  L225             Difference]: With dead ends: 43787
[2023-11-28 20:35:36,675 INFO  L226             Difference]: Without dead ends: 23674
[2023-11-28 20:35:36,686 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 15598 GetRequests, 15596 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 20:35:36,687 INFO  L413           NwaCegarLoop]: 35174 mSDtfsCounter, 12 mSDsluCounter, 70338 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 105512 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:35:36,687 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 105512 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 20:35:36,711 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23674 states.
[2023-11-28 20:35:37,008 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23674 to 23666.
[2023-11-28 20:35:37,027 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 23666 states, 23665 states have (on average 1.667779421085992) internal successors, (39468), 23665 states have internal predecessors, (39468), 0 states have call successors, (0), 0 states 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 20:35:37,051 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23666 states to 23666 states and 39468 transitions.
[2023-11-28 20:35:37,051 INFO  L78                 Accepts]: Start accepts. Automaton has 23666 states and 39468 transitions. Word has length 15599
[2023-11-28 20:35:37,053 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:35:37,053 INFO  L495      AbstractCegarLoop]: Abstraction has 23666 states and 39468 transitions.
[2023-11-28 20:35:37,055 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 0 states 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 20:35:37,055 INFO  L276                IsEmpty]: Start isEmpty. Operand 23666 states and 39468 transitions.
[2023-11-28 20:35:38,143 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15600
[2023-11-28 20:35:38,143 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:35:38,146 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 20:35:38,347 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forcibly destroying the process
[2023-11-28 20:35:38,352 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2023-11-28 20:35:38,353 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6
[2023-11-28 20:35:38,353 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:35:38,353 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:35:38,358 INFO  L85        PathProgramCache]: Analyzing trace with hash -1108766545, now seen corresponding path program 1 times
[2023-11-28 20:35:38,358 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:35:38,358 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438071289]
[2023-11-28 20:35:38,362 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:35:38,362 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:35:39,751 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:35:39,752 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828487629]
[2023-11-28 20:35:39,754 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:35:39,754 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:35:39,755 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:35:39,755 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:35:39,756 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-28 20:36:10,316 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:36:10,834 INFO  L262         TraceCheckSpWp]: Trace formula consists of 83172 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-28 20:36:11,020 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:36:11,345 INFO  L134       CoverageAnalysis]: Checked inductivity of 1718 backedges. 1718 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:36:11,345 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:36:11,346 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:36:11,346 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438071289]
[2023-11-28 20:36:11,346 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:36:11,346 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828487629]
[2023-11-28 20:36:11,346 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [828487629] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:36:11,346 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:36:11,351 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:36:11,351 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087185285]
[2023-11-28 20:36:11,351 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:36:11,363 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:36:11,363 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:36:11,375 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:36:11,375 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:36:11,379 INFO  L87              Difference]: Start difference. First operand 23666 states and 39468 transitions. Second operand  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 0 states 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 20:36:11,825 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:36:11,825 INFO  L93              Difference]: Finished difference Result 43789 states and 73032 transitions.
[2023-11-28 20:36:11,826 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:36:11,829 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 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 15599
[2023-11-28 20:36:11,831 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:36:11,847 INFO  L225             Difference]: With dead ends: 43789
[2023-11-28 20:36:11,847 INFO  L226             Difference]: Without dead ends: 23675
[2023-11-28 20:36:11,858 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 15598 GetRequests, 15596 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 20:36:11,858 INFO  L413           NwaCegarLoop]: 35174 mSDtfsCounter, 12 mSDsluCounter, 70338 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 105512 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:36:11,858 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 105512 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 20:36:11,881 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23675 states.
[2023-11-28 20:36:12,131 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23675 to 23667.
[2023-11-28 20:36:12,152 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 23667 states, 23666 states have (on average 1.6677512042592748) internal successors, (39469), 23666 states have internal predecessors, (39469), 0 states have call successors, (0), 0 states 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 20:36:12,177 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23667 states to 23667 states and 39469 transitions.
[2023-11-28 20:36:12,177 INFO  L78                 Accepts]: Start accepts. Automaton has 23667 states and 39469 transitions. Word has length 15599
[2023-11-28 20:36:12,179 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:36:12,179 INFO  L495      AbstractCegarLoop]: Abstraction has 23667 states and 39469 transitions.
[2023-11-28 20:36:12,182 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 0 states 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 20:36:12,182 INFO  L276                IsEmpty]: Start isEmpty. Operand 23667 states and 39469 transitions.
[2023-11-28 20:36:13,255 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15600
[2023-11-28 20:36:13,255 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:36:13,258 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 20:36:13,459 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forcibly destroying the process
[2023-11-28 20:36:13,466 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2023-11-28 20:36:13,466 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7
[2023-11-28 20:36:13,466 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:36:13,466 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:36:13,469 INFO  L85        PathProgramCache]: Analyzing trace with hash -182036995, now seen corresponding path program 1 times
[2023-11-28 20:36:13,469 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:36:13,469 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824535463]
[2023-11-28 20:36:13,470 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:36:13,471 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:36:14,857 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:36:14,858 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854333547]
[2023-11-28 20:36:14,860 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:36:14,861 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:36:14,861 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:36:14,861 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:36:14,862 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-28 20:36:45,638 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:36:46,163 INFO  L262         TraceCheckSpWp]: Trace formula consists of 83173 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-28 20:36:46,325 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:36:46,641 INFO  L134       CoverageAnalysis]: Checked inductivity of 1718 backedges. 1718 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:36:46,641 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:36:46,641 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:36:46,641 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824535463]
[2023-11-28 20:36:46,641 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:36:46,642 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854333547]
[2023-11-28 20:36:46,642 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854333547] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:36:46,642 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:36:46,646 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:36:46,646 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724159216]
[2023-11-28 20:36:46,646 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:36:46,654 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:36:46,654 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:36:46,662 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:36:46,662 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:36:46,666 INFO  L87              Difference]: Start difference. First operand 23667 states and 39469 transitions. Second operand  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 0 states 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 20:36:47,124 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:36:47,124 INFO  L93              Difference]: Finished difference Result 43791 states and 73034 transitions.
[2023-11-28 20:36:47,125 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:36:47,128 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 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 15599
[2023-11-28 20:36:47,131 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:36:47,146 INFO  L225             Difference]: With dead ends: 43791
[2023-11-28 20:36:47,146 INFO  L226             Difference]: Without dead ends: 23676
[2023-11-28 20:36:47,157 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 15598 GetRequests, 15596 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 20:36:47,157 INFO  L413           NwaCegarLoop]: 35174 mSDtfsCounter, 12 mSDsluCounter, 70338 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 105512 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:36:47,157 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 105512 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 20:36:47,182 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23676 states.
[2023-11-28 20:36:47,336 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23676 to 23668.
[2023-11-28 20:36:47,356 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 23668 states, 23667 states have (on average 1.667722989817045) internal successors, (39470), 23667 states have internal predecessors, (39470), 0 states have call successors, (0), 0 states 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 20:36:47,379 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23668 states to 23668 states and 39470 transitions.
[2023-11-28 20:36:47,379 INFO  L78                 Accepts]: Start accepts. Automaton has 23668 states and 39470 transitions. Word has length 15599
[2023-11-28 20:36:47,382 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:36:47,382 INFO  L495      AbstractCegarLoop]: Abstraction has 23668 states and 39470 transitions.
[2023-11-28 20:36:47,386 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 0 states 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 20:36:47,386 INFO  L276                IsEmpty]: Start isEmpty. Operand 23668 states and 39470 transitions.
[2023-11-28 20:36:48,513 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15600
[2023-11-28 20:36:48,513 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:36:48,518 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 20:36:48,718 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forcibly destroying the process
[2023-11-28 20:36:48,723 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2023-11-28 20:36:48,724 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8
[2023-11-28 20:36:48,724 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:36:48,724 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:36:48,729 INFO  L85        PathProgramCache]: Analyzing trace with hash 1697777995, now seen corresponding path program 1 times
[2023-11-28 20:36:48,729 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:36:48,729 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202716419]
[2023-11-28 20:36:48,732 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:36:48,732 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:36:50,290 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:36:50,290 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [220685865]
[2023-11-28 20:36:50,294 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:36:50,294 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:36:50,295 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:36:50,295 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:36:50,296 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-28 20:37:20,576 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:37:21,083 INFO  L262         TraceCheckSpWp]: Trace formula consists of 83174 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-28 20:37:21,248 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:37:21,587 INFO  L134       CoverageAnalysis]: Checked inductivity of 1718 backedges. 1718 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:37:21,587 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:37:21,587 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:37:21,587 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202716419]
[2023-11-28 20:37:21,587 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:37:21,587 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220685865]
[2023-11-28 20:37:21,587 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [220685865] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:37:21,587 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:37:21,591 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:37:21,591 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483293431]
[2023-11-28 20:37:21,591 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:37:21,600 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:37:21,600 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:37:21,608 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:37:21,608 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:37:21,612 INFO  L87              Difference]: Start difference. First operand 23668 states and 39470 transitions. Second operand  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 0 states 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 20:37:22,074 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:37:22,074 INFO  L93              Difference]: Finished difference Result 43793 states and 73036 transitions.
[2023-11-28 20:37:22,075 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:37:22,078 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 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 15599
[2023-11-28 20:37:22,081 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:37:22,096 INFO  L225             Difference]: With dead ends: 43793
[2023-11-28 20:37:22,096 INFO  L226             Difference]: Without dead ends: 23677
[2023-11-28 20:37:22,107 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 15598 GetRequests, 15596 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 20:37:22,107 INFO  L413           NwaCegarLoop]: 35174 mSDtfsCounter, 12 mSDsluCounter, 70338 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 105512 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:37:22,108 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 105512 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 20:37:22,130 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23677 states.
[2023-11-28 20:37:22,288 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23677 to 23669.
[2023-11-28 20:37:22,307 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 23669 states, 23668 states have (on average 1.6676947777589994) internal successors, (39471), 23668 states have internal predecessors, (39471), 0 states have call successors, (0), 0 states 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 20:37:22,331 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23669 states to 23669 states and 39471 transitions.
[2023-11-28 20:37:22,331 INFO  L78                 Accepts]: Start accepts. Automaton has 23669 states and 39471 transitions. Word has length 15599
[2023-11-28 20:37:22,333 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:37:22,333 INFO  L495      AbstractCegarLoop]: Abstraction has 23669 states and 39471 transitions.
[2023-11-28 20:37:22,336 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 0 states 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 20:37:22,336 INFO  L276                IsEmpty]: Start isEmpty. Operand 23669 states and 39471 transitions.
[2023-11-28 20:37:23,419 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15600
[2023-11-28 20:37:23,420 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:37:23,423 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 20:37:23,623 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forcibly destroying the process
[2023-11-28 20:37:23,634 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2023-11-28 20:37:23,635 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:37:23,635 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:37:23,635 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:37:23,637 INFO  L85        PathProgramCache]: Analyzing trace with hash -769769575, now seen corresponding path program 1 times
[2023-11-28 20:37:23,638 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:37:23,638 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406661545]
[2023-11-28 20:37:23,639 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:37:23,639 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:37:24,951 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:37:24,951 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [807875157]
[2023-11-28 20:37:24,954 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:37:24,954 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:37:24,954 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:37:24,955 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:37:24,956 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-11-28 20:37:56,358 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:37:56,869 INFO  L262         TraceCheckSpWp]: Trace formula consists of 83175 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-28 20:37:57,126 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:37:57,336 INFO  L134       CoverageAnalysis]: Checked inductivity of 1718 backedges. 1718 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:37:57,337 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:37:57,337 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:37:57,337 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406661545]
[2023-11-28 20:37:57,337 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:37:57,337 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807875157]
[2023-11-28 20:37:57,337 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [807875157] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:37:57,337 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:37:57,341 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:37:57,341 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767597796]
[2023-11-28 20:37:57,341 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:37:57,348 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:37:57,348 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:37:57,356 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:37:57,356 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:37:57,360 INFO  L87              Difference]: Start difference. First operand 23669 states and 39471 transitions. Second operand  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 0 states 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 20:37:57,891 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:37:57,891 INFO  L93              Difference]: Finished difference Result 43795 states and 73038 transitions.
[2023-11-28 20:37:57,892 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:37:57,894 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 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 15599
[2023-11-28 20:37:57,897 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:37:57,911 INFO  L225             Difference]: With dead ends: 43795
[2023-11-28 20:37:57,911 INFO  L226             Difference]: Without dead ends: 23678
[2023-11-28 20:37:57,920 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 15598 GetRequests, 15596 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 20:37:57,920 INFO  L413           NwaCegarLoop]: 35174 mSDtfsCounter, 12 mSDsluCounter, 70338 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 105512 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:37:57,921 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 105512 Invalid, 17 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 20:37:57,942 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23678 states.
[2023-11-28 20:37:58,094 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23678 to 23670.
[2023-11-28 20:37:58,113 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 23670 states, 23669 states have (on average 1.6676665680848366) internal successors, (39472), 23669 states have internal predecessors, (39472), 0 states have call successors, (0), 0 states 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 20:37:58,137 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23670 states to 23670 states and 39472 transitions.
[2023-11-28 20:37:58,137 INFO  L78                 Accepts]: Start accepts. Automaton has 23670 states and 39472 transitions. Word has length 15599
[2023-11-28 20:37:58,139 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:37:58,139 INFO  L495      AbstractCegarLoop]: Abstraction has 23670 states and 39472 transitions.
[2023-11-28 20:37:58,141 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 0 states 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 20:37:58,141 INFO  L276                IsEmpty]: Start isEmpty. Operand 23670 states and 39472 transitions.
[2023-11-28 20:37:59,228 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15600
[2023-11-28 20:37:59,228 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:37:59,231 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 20:37:59,431 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forcibly destroying the process
[2023-11-28 20:37:59,438 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0
[2023-11-28 20:37:59,438 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:37:59,439 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:37:59,439 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:37:59,442 INFO  L85        PathProgramCache]: Analyzing trace with hash -1316560665, now seen corresponding path program 1 times
[2023-11-28 20:37:59,443 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:37:59,443 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789092868]
[2023-11-28 20:37:59,444 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:37:59,444 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:38:00,760 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:38:00,761 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772259346]
[2023-11-28 20:38:00,763 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:38:00,763 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:38:00,763 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:38:00,764 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:38:00,765 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-11-28 20:38:31,236 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:38:31,750 INFO  L262         TraceCheckSpWp]: Trace formula consists of 83176 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-28 20:38:31,904 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:38:32,255 INFO  L134       CoverageAnalysis]: Checked inductivity of 1718 backedges. 1718 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:38:32,255 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:38:32,255 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:38:32,255 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789092868]
[2023-11-28 20:38:32,256 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:38:32,256 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772259346]
[2023-11-28 20:38:32,256 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [772259346] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:38:32,256 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:38:32,261 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:38:32,261 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452807455]
[2023-11-28 20:38:32,261 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:38:32,268 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:38:32,268 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:38:32,276 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:38:32,276 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:38:32,280 INFO  L87              Difference]: Start difference. First operand 23670 states and 39472 transitions. Second operand  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 0 states 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 20:38:32,736 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:38:32,736 INFO  L93              Difference]: Finished difference Result 43797 states and 73040 transitions.
[2023-11-28 20:38:32,737 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:38:32,741 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 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 15599
[2023-11-28 20:38:32,744 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:38:32,761 INFO  L225             Difference]: With dead ends: 43797
[2023-11-28 20:38:32,761 INFO  L226             Difference]: Without dead ends: 23679
[2023-11-28 20:38:32,771 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 15598 GetRequests, 15596 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 20:38:32,772 INFO  L413           NwaCegarLoop]: 35174 mSDtfsCounter, 12 mSDsluCounter, 70338 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 105512 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:38:32,772 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 105512 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 20:38:32,794 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23679 states.
[2023-11-28 20:38:32,958 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23679 to 23671.
[2023-11-28 20:38:32,978 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 23671 states, 23670 states have (on average 1.6676383607942544) internal successors, (39473), 23670 states have internal predecessors, (39473), 0 states have call successors, (0), 0 states 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 20:38:33,001 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23671 states to 23671 states and 39473 transitions.
[2023-11-28 20:38:33,002 INFO  L78                 Accepts]: Start accepts. Automaton has 23671 states and 39473 transitions. Word has length 15599
[2023-11-28 20:38:33,005 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:38:33,005 INFO  L495      AbstractCegarLoop]: Abstraction has 23671 states and 39473 transitions.
[2023-11-28 20:38:33,009 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 0 states 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 20:38:33,009 INFO  L276                IsEmpty]: Start isEmpty. Operand 23671 states and 39473 transitions.
[2023-11-28 20:38:34,146 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15600
[2023-11-28 20:38:34,146 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:38:34,149 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 20:38:34,349 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forcibly destroying the process
[2023-11-28 20:38:34,357 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0
[2023-11-28 20:38:34,357 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11
[2023-11-28 20:38:34,357 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:38:34,358 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:38:34,360 INFO  L85        PathProgramCache]: Analyzing trace with hash 1113785653, now seen corresponding path program 1 times
[2023-11-28 20:38:34,360 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:38:34,360 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264264286]
[2023-11-28 20:38:34,361 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:38:34,361 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:38:35,861 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:38:35,861 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855650281]
[2023-11-28 20:38:35,864 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:38:35,864 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:38:35,864 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:38:35,865 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:38:35,866 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2023-11-28 20:39:06,355 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:39:06,891 INFO  L262         TraceCheckSpWp]: Trace formula consists of 83177 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-28 20:39:07,044 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:39:07,255 INFO  L134       CoverageAnalysis]: Checked inductivity of 1718 backedges. 1718 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:39:07,255 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:39:07,255 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:39:07,255 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264264286]
[2023-11-28 20:39:07,255 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:39:07,255 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855650281]
[2023-11-28 20:39:07,255 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [855650281] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:39:07,256 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:39:07,261 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:39:07,261 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986008552]
[2023-11-28 20:39:07,261 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:39:07,267 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:39:07,267 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:39:07,274 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:39:07,274 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:39:07,278 INFO  L87              Difference]: Start difference. First operand 23671 states and 39473 transitions. Second operand  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 0 states 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 20:39:07,728 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:39:07,728 INFO  L93              Difference]: Finished difference Result 43799 states and 73042 transitions.
[2023-11-28 20:39:07,729 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:39:07,732 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 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 15599
[2023-11-28 20:39:07,735 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:39:07,750 INFO  L225             Difference]: With dead ends: 43799
[2023-11-28 20:39:07,750 INFO  L226             Difference]: Without dead ends: 23680
[2023-11-28 20:39:07,760 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 15598 GetRequests, 15596 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 20:39:07,761 INFO  L413           NwaCegarLoop]: 35174 mSDtfsCounter, 12 mSDsluCounter, 70338 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 105512 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:39:07,761 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 105512 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 20:39:07,784 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23680 states.
[2023-11-28 20:39:07,936 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23680 to 23672.
[2023-11-28 20:39:07,956 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 23672 states, 23671 states have (on average 1.6676101558869503) internal successors, (39474), 23671 states have internal predecessors, (39474), 0 states have call successors, (0), 0 states 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 20:39:07,979 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23672 states to 23672 states and 39474 transitions.
[2023-11-28 20:39:07,979 INFO  L78                 Accepts]: Start accepts. Automaton has 23672 states and 39474 transitions. Word has length 15599
[2023-11-28 20:39:07,981 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:39:07,981 INFO  L495      AbstractCegarLoop]: Abstraction has 23672 states and 39474 transitions.
[2023-11-28 20:39:07,985 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 0 states 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 20:39:07,985 INFO  L276                IsEmpty]: Start isEmpty. Operand 23672 states and 39474 transitions.
[2023-11-28 20:39:09,213 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15600
[2023-11-28 20:39:09,213 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:39:09,216 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 20:39:09,416 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forcibly destroying the process
[2023-11-28 20:39:09,426 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0
[2023-11-28 20:39:09,426 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12
[2023-11-28 20:39:09,427 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:39:09,427 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:39:09,429 INFO  L85        PathProgramCache]: Analyzing trace with hash -506780797, now seen corresponding path program 1 times
[2023-11-28 20:39:09,429 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:39:09,429 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709918233]
[2023-11-28 20:39:09,430 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:39:09,430 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:39:10,766 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:39:10,766 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1464402138]
[2023-11-28 20:39:10,769 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:39:10,769 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:39:10,769 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:39:10,770 INFO  L229       MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:39:10,771 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2023-11-28 20:39:45,236 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:39:45,771 INFO  L262         TraceCheckSpWp]: Trace formula consists of 83178 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-28 20:39:46,062 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:39:46,277 INFO  L134       CoverageAnalysis]: Checked inductivity of 1718 backedges. 1718 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:39:46,277 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:39:46,278 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:39:46,278 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709918233]
[2023-11-28 20:39:46,278 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:39:46,278 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464402138]
[2023-11-28 20:39:46,278 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464402138] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:39:46,278 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:39:46,282 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:39:46,282 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085735625]
[2023-11-28 20:39:46,282 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:39:46,288 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:39:46,288 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:39:46,299 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:39:46,300 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:39:46,305 INFO  L87              Difference]: Start difference. First operand 23672 states and 39474 transitions. Second operand  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 0 states 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 20:39:46,779 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:39:46,779 INFO  L93              Difference]: Finished difference Result 43801 states and 73044 transitions.
[2023-11-28 20:39:46,780 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:39:46,784 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 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 15599
[2023-11-28 20:39:46,786 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:39:46,802 INFO  L225             Difference]: With dead ends: 43801
[2023-11-28 20:39:46,802 INFO  L226             Difference]: Without dead ends: 23681
[2023-11-28 20:39:46,813 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 15598 GetRequests, 15596 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 20:39:46,813 INFO  L413           NwaCegarLoop]: 35174 mSDtfsCounter, 12 mSDsluCounter, 70338 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 105512 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:39:46,814 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 105512 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 20:39:46,838 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23681 states.
[2023-11-28 20:39:47,005 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23681 to 23673.
[2023-11-28 20:39:47,025 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 23673 states, 23672 states have (on average 1.6675819533626226) internal successors, (39475), 23672 states have internal predecessors, (39475), 0 states have call successors, (0), 0 states 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 20:39:47,050 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23673 states to 23673 states and 39475 transitions.
[2023-11-28 20:39:47,050 INFO  L78                 Accepts]: Start accepts. Automaton has 23673 states and 39475 transitions. Word has length 15599
[2023-11-28 20:39:47,052 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:39:47,052 INFO  L495      AbstractCegarLoop]: Abstraction has 23673 states and 39475 transitions.
[2023-11-28 20:39:47,056 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 0 states 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 20:39:47,056 INFO  L276                IsEmpty]: Start isEmpty. Operand 23673 states and 39475 transitions.
[2023-11-28 20:39:48,189 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15600
[2023-11-28 20:39:48,189 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:39:48,191 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 20:39:48,392 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forcibly destroying the process
[2023-11-28 20:39:48,415 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0
[2023-11-28 20:39:48,416 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13
[2023-11-28 20:39:48,416 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:39:48,416 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:39:48,419 INFO  L85        PathProgramCache]: Analyzing trace with hash 367343313, now seen corresponding path program 1 times
[2023-11-28 20:39:48,420 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:39:48,420 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976950025]
[2023-11-28 20:39:48,421 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:39:48,421 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:39:49,817 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:39:49,817 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130868056]
[2023-11-28 20:39:49,820 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:39:49,820 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:39:49,820 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:39:49,821 INFO  L229       MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:39:49,822 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2023-11-28 20:40:24,045 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:40:24,547 INFO  L262         TraceCheckSpWp]: Trace formula consists of 83179 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-28 20:40:24,696 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:40:24,981 INFO  L134       CoverageAnalysis]: Checked inductivity of 1718 backedges. 1718 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:40:24,981 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:40:24,981 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:40:24,981 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976950025]
[2023-11-28 20:40:24,981 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:40:24,982 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130868056]
[2023-11-28 20:40:24,982 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130868056] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:40:24,982 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:40:24,987 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:40:24,987 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6582542]
[2023-11-28 20:40:24,987 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:40:24,993 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:40:24,994 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:40:25,000 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:40:25,001 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:40:25,004 INFO  L87              Difference]: Start difference. First operand 23673 states and 39475 transitions. Second operand  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 0 states 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 20:40:25,445 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:40:25,445 INFO  L93              Difference]: Finished difference Result 43803 states and 73046 transitions.
[2023-11-28 20:40:25,446 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:40:25,449 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 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 15599
[2023-11-28 20:40:25,452 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:40:25,467 INFO  L225             Difference]: With dead ends: 43803
[2023-11-28 20:40:25,467 INFO  L226             Difference]: Without dead ends: 23682
[2023-11-28 20:40:25,477 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 15598 GetRequests, 15596 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 20:40:25,478 INFO  L413           NwaCegarLoop]: 35174 mSDtfsCounter, 12 mSDsluCounter, 70338 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 105512 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:40:25,478 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 105512 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 20:40:25,500 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23682 states.
[2023-11-28 20:40:25,738 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23682 to 23674.
[2023-11-28 20:40:25,756 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 23674 states, 23673 states have (on average 1.667553753220969) internal successors, (39476), 23673 states have internal predecessors, (39476), 0 states have call successors, (0), 0 states 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 20:40:25,779 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23674 states to 23674 states and 39476 transitions.
[2023-11-28 20:40:25,779 INFO  L78                 Accepts]: Start accepts. Automaton has 23674 states and 39476 transitions. Word has length 15599
[2023-11-28 20:40:25,781 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:40:25,781 INFO  L495      AbstractCegarLoop]: Abstraction has 23674 states and 39476 transitions.
[2023-11-28 20:40:25,784 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 0 states 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 20:40:25,784 INFO  L276                IsEmpty]: Start isEmpty. Operand 23674 states and 39476 transitions.
[2023-11-28 20:40:26,873 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15600
[2023-11-28 20:40:26,873 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:40:26,876 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 20:40:27,076 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forcibly destroying the process
[2023-11-28 20:40:27,118 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 137
[2023-11-28 20:40:27,118 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2023-11-28 20:40:27,118 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:40:27,118 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:40:27,123 INFO  L85        PathProgramCache]: Analyzing trace with hash -373540833, now seen corresponding path program 1 times
[2023-11-28 20:40:27,123 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:40:27,123 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103443490]
[2023-11-28 20:40:27,125 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:40:27,125 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:40:28,541 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:40:28,541 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009259203]
[2023-11-28 20:40:28,545 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:40:28,545 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:40:28,545 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:40:28,546 INFO  L229       MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:40:28,546 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2023-11-28 20:41:02,117 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:41:02,690 INFO  L262         TraceCheckSpWp]: Trace formula consists of 83180 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-28 20:41:02,853 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:41:03,072 INFO  L134       CoverageAnalysis]: Checked inductivity of 1718 backedges. 1718 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:41:03,072 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:41:03,072 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:41:03,072 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103443490]
[2023-11-28 20:41:03,072 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:41:03,072 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009259203]
[2023-11-28 20:41:03,073 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009259203] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:41:03,073 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:41:03,078 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:41:03,078 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673259961]
[2023-11-28 20:41:03,078 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:41:03,084 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:41:03,084 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:41:03,091 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:41:03,092 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:41:03,096 INFO  L87              Difference]: Start difference. First operand 23674 states and 39476 transitions. Second operand  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 0 states 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 20:41:03,565 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:41:03,565 INFO  L93              Difference]: Finished difference Result 43805 states and 73048 transitions.
[2023-11-28 20:41:03,566 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:41:03,569 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 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 15599
[2023-11-28 20:41:03,572 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:41:03,588 INFO  L225             Difference]: With dead ends: 43805
[2023-11-28 20:41:03,588 INFO  L226             Difference]: Without dead ends: 23683
[2023-11-28 20:41:03,599 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 15598 GetRequests, 15596 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 20:41:03,600 INFO  L413           NwaCegarLoop]: 35174 mSDtfsCounter, 12 mSDsluCounter, 70338 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 105512 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:41:03,600 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 105512 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 20:41:03,626 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23683 states.
[2023-11-28 20:41:03,879 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23683 to 23675.
[2023-11-28 20:41:03,900 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 23675 states, 23674 states have (on average 1.667525555461688) internal successors, (39477), 23674 states have internal predecessors, (39477), 0 states have call successors, (0), 0 states 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 20:41:03,925 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23675 states to 23675 states and 39477 transitions.
[2023-11-28 20:41:03,926 INFO  L78                 Accepts]: Start accepts. Automaton has 23675 states and 39477 transitions. Word has length 15599
[2023-11-28 20:41:03,928 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:41:03,928 INFO  L495      AbstractCegarLoop]: Abstraction has 23675 states and 39477 transitions.
[2023-11-28 20:41:03,930 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 0 states 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 20:41:03,931 INFO  L276                IsEmpty]: Start isEmpty. Operand 23675 states and 39477 transitions.
[2023-11-28 20:41:05,025 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15600
[2023-11-28 20:41:05,025 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:41:05,028 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 20:41:05,228 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forcibly destroying the process
[2023-11-28 20:41:05,266 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0
[2023-11-28 20:41:05,266 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2023-11-28 20:41:05,266 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:41:05,267 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:41:05,271 INFO  L85        PathProgramCache]: Analyzing trace with hash -688472979, now seen corresponding path program 1 times
[2023-11-28 20:41:05,271 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:41:05,271 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519232827]
[2023-11-28 20:41:05,275 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:41:05,275 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:41:06,649 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:41:06,649 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1865882015]
[2023-11-28 20:41:06,652 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:41:06,652 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:41:06,652 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:41:06,653 INFO  L229       MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:41:06,653 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2023-11-28 20:41:39,155 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:41:39,761 INFO  L262         TraceCheckSpWp]: Trace formula consists of 83181 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-28 20:41:40,083 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:41:40,301 INFO  L134       CoverageAnalysis]: Checked inductivity of 1718 backedges. 1718 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:41:40,301 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:41:40,301 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:41:40,301 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519232827]
[2023-11-28 20:41:40,301 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:41:40,301 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865882015]
[2023-11-28 20:41:40,301 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865882015] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:41:40,301 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:41:40,305 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:41:40,305 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224336306]
[2023-11-28 20:41:40,305 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:41:40,311 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:41:40,312 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:41:40,318 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:41:40,319 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:41:40,323 INFO  L87              Difference]: Start difference. First operand 23675 states and 39477 transitions. Second operand  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 0 states 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 20:41:40,790 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:41:40,790 INFO  L93              Difference]: Finished difference Result 43807 states and 73050 transitions.
[2023-11-28 20:41:40,790 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:41:40,794 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 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 15599
[2023-11-28 20:41:40,797 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:41:40,812 INFO  L225             Difference]: With dead ends: 43807
[2023-11-28 20:41:40,812 INFO  L226             Difference]: Without dead ends: 23684
[2023-11-28 20:41:40,824 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 15598 GetRequests, 15596 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 20:41:40,824 INFO  L413           NwaCegarLoop]: 35174 mSDtfsCounter, 12 mSDsluCounter, 70338 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 105512 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:41:40,824 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 105512 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 20:41:40,850 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23684 states.
[2023-11-28 20:41:41,019 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23684 to 23676.
[2023-11-28 20:41:41,040 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 23676 states, 23675 states have (on average 1.6674973600844774) internal successors, (39478), 23675 states have internal predecessors, (39478), 0 states have call successors, (0), 0 states 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 20:41:41,066 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23676 states to 23676 states and 39478 transitions.
[2023-11-28 20:41:41,066 INFO  L78                 Accepts]: Start accepts. Automaton has 23676 states and 39478 transitions. Word has length 15599
[2023-11-28 20:41:41,068 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:41:41,069 INFO  L495      AbstractCegarLoop]: Abstraction has 23676 states and 39478 transitions.
[2023-11-28 20:41:41,072 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 3899.75) internal successors, (15599), 4 states have internal predecessors, (15599), 0 states have call successors, (0), 0 states 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 20:41:41,072 INFO  L276                IsEmpty]: Start isEmpty. Operand 23676 states and 39478 transitions.
[2023-11-28 20:41:42,214 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15600
[2023-11-28 20:41:42,214 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:41:42,217 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 20:41:42,417 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forcibly destroying the process
[2023-11-28 20:41:42,450 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0
[2023-11-28 20:41:42,451 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16
[2023-11-28 20:41:42,451 INFO  L420      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:41:42,451 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:41:42,453 INFO  L85        PathProgramCache]: Analyzing trace with hash 253275067, now seen corresponding path program 1 times
[2023-11-28 20:41:42,453 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:41:42,453 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474663559]
[2023-11-28 20:41:42,454 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:41:42,455 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:41:43,802 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:41:43,802 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [321816281]
[2023-11-28 20:41:43,805 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:41:43,805 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:41:43,806 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:41:43,806 INFO  L229       MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:41:43,807 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process
[2023-11-28 20:42:16,458 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:42:17,023 INFO  L262         TraceCheckSpWp]: Trace formula consists of 83182 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-28 20:42:17,249 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:42:19,441 INFO  L134       CoverageAnalysis]: Checked inductivity of 1718 backedges. 6 proven. 1279 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked.
[2023-11-28 20:42:19,441 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:42:19,770 INFO  L134       CoverageAnalysis]: Checked inductivity of 1718 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1712 trivial. 0 not checked.
[2023-11-28 20:42:19,770 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:42:19,770 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474663559]
[2023-11-28 20:42:19,770 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:42:19,770 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321816281]
[2023-11-28 20:42:19,770 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [321816281] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:42:19,770 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:42:19,778 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12
[2023-11-28 20:42:19,778 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501781497]
[2023-11-28 20:42:19,779 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:42:19,787 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-28 20:42:19,787 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:42:19,794 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-28 20:42:19,794 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132
[2023-11-28 20:42:19,798 INFO  L87              Difference]: Start difference. First operand 23676 states and 39478 transitions. Second operand  has 6 states, 6 states have (on average 2314.6666666666665) internal successors, (13888), 6 states have internal predecessors, (13888), 0 states have call successors, (0), 0 states 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 20:43:09,804 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:43:09,805 INFO  L93              Difference]: Finished difference Result 102089 states and 169558 transitions.
[2023-11-28 20:43:09,805 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-11-28 20:43:09,808 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 2314.6666666666665) internal successors, (13888), 6 states have internal predecessors, (13888), 0 states have call successors, (0), 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 15599
[2023-11-28 20:43:09,817 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:43:09,847 INFO  L225             Difference]: With dead ends: 102089
[2023-11-28 20:43:09,847 INFO  L226             Difference]: Without dead ends: 63917
[2023-11-28 20:43:09,859 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 31198 GetRequests, 31186 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 20:43:09,860 INFO  L413           NwaCegarLoop]: 56419 mSDtfsCounter, 94390 mSDsluCounter, 161105 mSDsCounter, 0 mSdLazyCounter, 70173 mSolverCounterSat, 2073 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94390 SdHoareTripleChecker+Valid, 217524 SdHoareTripleChecker+Invalid, 72246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.7s SdHoareTripleChecker+Time, 2073 IncrementalHoareTripleChecker+Valid, 70173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.5s IncrementalHoareTripleChecker+Time
[2023-11-28 20:43:09,860 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [94390 Valid, 217524 Invalid, 72246 Unknown, 0 Unchecked, 0.7s Time], IncrementalHoareTripleChecker [2073 Valid, 70173 Invalid, 0 Unknown, 0 Unchecked, 47.5s Time]
[2023-11-28 20:43:09,912 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 63917 states.
[2023-11-28 20:43:10,180 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 63917 to 23676.
[2023-11-28 20:43:10,202 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 23676 states, 23675 states have (on average 1.6674973600844774) internal successors, (39478), 23675 states have internal predecessors, (39478), 0 states have call successors, (0), 0 states 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 20:43:10,229 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23676 states to 23676 states and 39478 transitions.
[2023-11-28 20:43:10,229 INFO  L78                 Accepts]: Start accepts. Automaton has 23676 states and 39478 transitions. Word has length 15599
[2023-11-28 20:43:10,237 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:43:10,237 INFO  L495      AbstractCegarLoop]: Abstraction has 23676 states and 39478 transitions.
[2023-11-28 20:43:10,239 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 2314.6666666666665) internal successors, (13888), 6 states have internal predecessors, (13888), 0 states have call successors, (0), 0 states 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 20:43:10,239 INFO  L276                IsEmpty]: Start isEmpty. Operand 23676 states and 39478 transitions.
[2023-11-28 20:43:11,428 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15601
[2023-11-28 20:43:11,428 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:43:11,431 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 20:43:11,631 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forcibly destroying the process
[2023-11-28 20:43:11,673 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 137
[2023-11-28 20:43:11,673 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17
[2023-11-28 20:43:11,673 INFO  L420      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:43:11,674 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:43:11,676 INFO  L85        PathProgramCache]: Analyzing trace with hash 861513477, now seen corresponding path program 1 times
[2023-11-28 20:43:11,676 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:43:11,676 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715651407]
[2023-11-28 20:43:11,677 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:43:11,678 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:43:13,311 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:43:13,312 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241883643]
[2023-11-28 20:43:13,315 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:43:13,315 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:43:13,315 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:43:13,316 INFO  L229       MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:43:13,317 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e72545-467b-4036-b7b2-7d431637f060/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process