./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.2.prop5-back-serstep.c --full-output --architecture 64bit


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


Checking for ERROR reachability
Using default analysis
Version 0e0057cc
Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/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_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.2.prop5-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/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_1a5a3f21-170a-410c-8bdd-6eab2807780e/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 665e7117e1fd0f762b16c70ad7b4249fdb63749d06eaf15bd360fd2ce4306028
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-11-29 05:21:26,689 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-29 05:21:26,753 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-29 05:21:26,759 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-29 05:21:26,759 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-29 05:21:26,786 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-29 05:21:26,787 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-29 05:21:26,787 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-29 05:21:26,788 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-29 05:21:26,788 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-29 05:21:26,789 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-29 05:21:26,789 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-29 05:21:26,790 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-29 05:21:26,791 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-29 05:21:26,791 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-29 05:21:26,792 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-29 05:21:26,792 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-29 05:21:26,793 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-29 05:21:26,793 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-29 05:21:26,794 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-29 05:21:26,794 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-29 05:21:26,795 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-29 05:21:26,795 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-29 05:21:26,796 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-29 05:21:26,796 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-29 05:21:26,797 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-29 05:21:26,797 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-29 05:21:26,798 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-29 05:21:26,798 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-29 05:21:26,799 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-29 05:21:26,799 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-29 05:21:26,799 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-29 05:21:26,800 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-29 05:21:26,800 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-29 05:21:26,801 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-29 05:21:26,801 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-29 05:21:26,802 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-29 05:21:26,802 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-29 05:21:26,802 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-29 05:21:26,803 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_1a5a3f21-170a-410c-8bdd-6eab2807780e/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_1a5a3f21-170a-410c-8bdd-6eab2807780e/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 -> 665e7117e1fd0f762b16c70ad7b4249fdb63749d06eaf15bd360fd2ce4306028
[2023-11-29 05:21:27,030 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-29 05:21:27,052 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-29 05:21:27,054 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-29 05:21:27,056 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-29 05:21:27,056 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-29 05:21:27,057 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.2.prop5-back-serstep.c
[2023-11-29 05:21:29,833 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-29 05:21:30,292 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-29 05:21:30,293 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.2.prop5-back-serstep.c
[2023-11-29 05:21:30,334 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/data/a4acefc4b/eda3c8ac88de4b30bdc6bd86db29e782/FLAG2c087b937
[2023-11-29 05:21:30,345 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/data/a4acefc4b/eda3c8ac88de4b30bdc6bd86db29e782
[2023-11-29 05:21:30,348 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-29 05:21:30,350 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-29 05:21:30,351 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-29 05:21:30,351 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-29 05:21:30,356 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-29 05:21:30,356 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:21:30" (1/1) ...
[2023-11-29 05:21:30,357 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38da469f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:21:30, skipping insertion in model container
[2023-11-29 05:21:30,357 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:21:30" (1/1) ...
[2023-11-29 05:21:30,569 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-29 05:21:30,888 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_1a5a3f21-170a-410c-8bdd-6eab2807780e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.2.prop5-back-serstep.c[1180,1193]
[2023-11-29 05:21:32,278 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-29 05:21:32,291 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-29 05:21:32,314 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_1a5a3f21-170a-410c-8bdd-6eab2807780e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.2.prop5-back-serstep.c[1180,1193]
[2023-11-29 05:21:33,423 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-29 05:21:33,445 INFO  L206         MainTranslator]: Completed translation
[2023-11-29 05:21:33,446 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:21:33 WrapperNode
[2023-11-29 05:21:33,446 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-29 05:21:33,448 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-29 05:21:33,448 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-29 05:21:33,448 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-29 05:21:33,456 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:21:33" (1/1) ...
[2023-11-29 05:21:33,880 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:21:33" (1/1) ...
[2023-11-29 05:21:37,765 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55698
[2023-11-29 05:21:37,765 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-29 05:21:37,766 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-29 05:21:37,766 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-29 05:21:37,766 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-29 05:21:37,776 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:21:33" (1/1) ...
[2023-11-29 05:21:37,776 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:21:33" (1/1) ...
[2023-11-29 05:21:38,689 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:21:33" (1/1) ...
[2023-11-29 05:21:39,338 INFO  L175           MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0].
[2023-11-29 05:21:39,338 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:21:33" (1/1) ...
[2023-11-29 05:21:39,338 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:21:33" (1/1) ...
[2023-11-29 05:21:40,137 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:21:33" (1/1) ...
[2023-11-29 05:21:40,307 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:21:33" (1/1) ...
[2023-11-29 05:21:40,486 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:21:33" (1/1) ...
[2023-11-29 05:21:40,640 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:21:33" (1/1) ...
[2023-11-29 05:21:41,449 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-29 05:21:41,449 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-29 05:21:41,450 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-29 05:21:41,450 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-29 05:21:41,450 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:21:33" (1/1) ...
[2023-11-29 05:21:41,455 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-29 05:21:41,464 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 05:21:41,475 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2023-11-29 05:21:41,477 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2023-11-29 05:21:41,506 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-29 05:21:41,506 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-11-29 05:21:41,506 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-29 05:21:41,506 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-29 05:21:43,439 INFO  L241             CfgBuilder]: Building ICFG
[2023-11-29 05:21:43,441 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-29 05:22:07,338 INFO  L282             CfgBuilder]: Performing block encoding
[2023-11-29 05:22:07,938 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-29 05:22:07,938 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-29 05:22:07,944 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:22:07 BoogieIcfgContainer
[2023-11-29 05:22:07,944 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-29 05:22:07,947 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-29 05:22:07,948 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-29 05:22:07,951 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-29 05:22:07,951 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:21:30" (1/3) ...
[2023-11-29 05:22:07,952 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75937d43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:22:07, skipping insertion in model container
[2023-11-29 05:22:07,952 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:21:33" (2/3) ...
[2023-11-29 05:22:07,953 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75937d43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:22:07, skipping insertion in model container
[2023-11-29 05:22:07,953 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:22:07" (3/3) ...
[2023-11-29 05:22:07,954 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.pgm_protocol.2.prop5-back-serstep.c
[2023-11-29 05:22:07,973 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-29 05:22:07,973 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-29 05:22:08,183 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-29 05:22:08,190 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;@73fd9c47, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-29 05:22:08,191 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-29 05:22:08,228 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 12052 states, 12050 states have (on average 1.6668879668049792) internal successors, (20086), 12051 states have internal predecessors, (20086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:22:08,315 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1255
[2023-11-29 05:22:08,315 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 05:22:08,317 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 05:22:08,317 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 05:22:08,322 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 05:22:08,323 INFO  L85        PathProgramCache]: Analyzing trace with hash 513727700, now seen corresponding path program 1 times
[2023-11-29 05:22:08,333 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 05:22:08,333 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586149185]
[2023-11-29 05:22:08,334 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:22:08,334 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 05:22:09,513 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 05:22:13,999 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 05:22:14,000 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 05:22:14,000 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586149185]
[2023-11-29 05:22:14,001 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586149185] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 05:22:14,001 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 05:22:14,001 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 05:22:14,002 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235279137]
[2023-11-29 05:22:14,003 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 05:22:14,009 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 05:22:14,010 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 05:22:14,036 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 05:22:14,036 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 05:22:14,062 INFO  L87              Difference]: Start difference. First operand  has 12052 states, 12050 states have (on average 1.6668879668049792) internal successors, (20086), 12051 states have internal predecessors, (20086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 4 states, 4 states have (on average 313.5) internal successors, (1254), 4 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:22:14,611 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 05:22:14,611 INFO  L93              Difference]: Finished difference Result 23581 states and 39303 transitions.
[2023-11-29 05:22:14,612 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 05:22:14,614 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 313.5) internal successors, (1254), 4 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1254
[2023-11-29 05:22:14,622 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 05:22:14,687 INFO  L225             Difference]: With dead ends: 23581
[2023-11-29 05:22:14,688 INFO  L226             Difference]: Without dead ends: 12052
[2023-11-29 05:22:14,705 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 05:22:14,708 INFO  L413           NwaCegarLoop]: 20079 mSDtfsCounter, 1 mSDsluCounter, 40153 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 60232 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 05:22:14,709 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 60232 Invalid, 13 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 05:22:14,742 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12052 states.
[2023-11-29 05:22:14,933 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12052 to 12052.
[2023-11-29 05:22:14,958 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12052 states, 12051 states have (on average 1.6665836860011618) internal successors, (20084), 12051 states have internal predecessors, (20084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:22:14,997 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12052 states to 12052 states and 20084 transitions.
[2023-11-29 05:22:14,998 INFO  L78                 Accepts]: Start accepts. Automaton has 12052 states and 20084 transitions. Word has length 1254
[2023-11-29 05:22:15,001 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 05:22:15,001 INFO  L495      AbstractCegarLoop]: Abstraction has 12052 states and 20084 transitions.
[2023-11-29 05:22:15,002 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 313.5) internal successors, (1254), 4 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:22:15,002 INFO  L276                IsEmpty]: Start isEmpty. Operand 12052 states and 20084 transitions.
[2023-11-29 05:22:15,073 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1256
[2023-11-29 05:22:15,073 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 05:22:15,074 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 05:22:15,074 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-29 05:22:15,074 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 05:22:15,075 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 05:22:15,075 INFO  L85        PathProgramCache]: Analyzing trace with hash -1252578036, now seen corresponding path program 1 times
[2023-11-29 05:22:15,076 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 05:22:15,076 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803190099]
[2023-11-29 05:22:15,076 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:22:15,077 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 05:22:15,596 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 05:22:17,386 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 05:22:17,386 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 05:22:17,387 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803190099]
[2023-11-29 05:22:17,387 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803190099] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 05:22:17,387 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 05:22:17,387 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 05:22:17,388 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837276145]
[2023-11-29 05:22:17,388 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 05:22:17,391 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 05:22:17,391 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 05:22:17,393 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 05:22:17,393 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 05:22:17,394 INFO  L87              Difference]: Start difference. First operand 12052 states and 20084 transitions. Second operand  has 4 states, 4 states have (on average 313.75) internal successors, (1255), 4 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:22:17,929 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 05:22:17,929 INFO  L93              Difference]: Finished difference Result 23584 states and 39301 transitions.
[2023-11-29 05:22:17,930 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 05:22:17,930 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 313.75) internal successors, (1255), 4 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1255
[2023-11-29 05:22:17,933 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 05:22:17,985 INFO  L225             Difference]: With dead ends: 23584
[2023-11-29 05:22:17,985 INFO  L226             Difference]: Without dead ends: 12055
[2023-11-29 05:22:17,996 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 05:22:17,998 INFO  L413           NwaCegarLoop]: 20079 mSDtfsCounter, 1 mSDsluCounter, 40151 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 60230 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 05:22:17,998 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 60230 Invalid, 15 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 05:22:18,018 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12055 states.
[2023-11-29 05:22:18,175 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12055 to 12054.
[2023-11-29 05:22:18,189 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12054 states, 12053 states have (on average 1.6664730772421803) internal successors, (20086), 12053 states have internal predecessors, (20086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:22:18,218 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12054 states to 12054 states and 20086 transitions.
[2023-11-29 05:22:18,218 INFO  L78                 Accepts]: Start accepts. Automaton has 12054 states and 20086 transitions. Word has length 1255
[2023-11-29 05:22:18,221 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 05:22:18,221 INFO  L495      AbstractCegarLoop]: Abstraction has 12054 states and 20086 transitions.
[2023-11-29 05:22:18,222 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 313.75) internal successors, (1255), 4 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:22:18,222 INFO  L276                IsEmpty]: Start isEmpty. Operand 12054 states and 20086 transitions.
[2023-11-29 05:22:18,234 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1257
[2023-11-29 05:22:18,234 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 05:22:18,235 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 05:22:18,235 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-29 05:22:18,236 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 05:22:18,236 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 05:22:18,237 INFO  L85        PathProgramCache]: Analyzing trace with hash -385638418, now seen corresponding path program 1 times
[2023-11-29 05:22:18,238 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 05:22:18,238 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391013511]
[2023-11-29 05:22:18,238 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:22:18,239 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 05:22:18,910 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 05:22:21,290 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 05:22:21,290 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 05:22:21,290 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391013511]
[2023-11-29 05:22:21,291 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391013511] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 05:22:21,291 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 05:22:21,291 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 05:22:21,292 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328657224]
[2023-11-29 05:22:21,292 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 05:22:21,294 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 05:22:21,294 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 05:22:21,296 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 05:22:21,296 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-29 05:22:21,297 INFO  L87              Difference]: Start difference. First operand 12054 states and 20086 transitions. Second operand  has 5 states, 5 states have (on average 251.2) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:22:22,077 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 05:22:22,077 INFO  L93              Difference]: Finished difference Result 36456 states and 60751 transitions.
[2023-11-29 05:22:22,078 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 05:22:22,078 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 251.2) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1256
[2023-11-29 05:22:22,081 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 05:22:22,122 INFO  L225             Difference]: With dead ends: 36456
[2023-11-29 05:22:22,122 INFO  L226             Difference]: Without dead ends: 24925
[2023-11-29 05:22:22,134 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2023-11-29 05:22:22,135 INFO  L413           NwaCegarLoop]: 22323 mSDtfsCounter, 78689 mSDsluCounter, 40152 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78689 SdHoareTripleChecker+Valid, 62475 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 05:22:22,136 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [78689 Valid, 62475 Invalid, 16 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 05:22:22,163 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24925 states.
[2023-11-29 05:22:22,363 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24925 to 13403.
[2023-11-29 05:22:22,381 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13403 states, 13402 states have (on average 1.666393075660349) internal successors, (22333), 13402 states have internal predecessors, (22333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:22:22,401 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13403 states to 13403 states and 22333 transitions.
[2023-11-29 05:22:22,402 INFO  L78                 Accepts]: Start accepts. Automaton has 13403 states and 22333 transitions. Word has length 1256
[2023-11-29 05:22:22,404 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 05:22:22,404 INFO  L495      AbstractCegarLoop]: Abstraction has 13403 states and 22333 transitions.
[2023-11-29 05:22:22,404 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 251.2) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:22:22,404 INFO  L276                IsEmpty]: Start isEmpty. Operand 13403 states and 22333 transitions.
[2023-11-29 05:22:22,814 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8928
[2023-11-29 05:22:22,815 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 05:22:22,820 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 05:22:22,821 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-29 05:22:22,821 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 05:22:22,821 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 05:22:22,824 INFO  L85        PathProgramCache]: Analyzing trace with hash -882525628, now seen corresponding path program 1 times
[2023-11-29 05:22:22,825 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 05:22:22,825 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591802352]
[2023-11-29 05:22:22,826 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:22:22,827 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 05:22:23,916 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 05:22:23,917 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [914807845]
[2023-11-29 05:22:23,919 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:22:23,919 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:22:23,919 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 05:22:23,920 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 05:22:23,927 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-29 05:22:36,315 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 05:22:36,603 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44671 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 05:22:36,796 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 05:22:37,216 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 904 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 05:22:37,216 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 05:22:37,216 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 05:22:37,217 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591802352]
[2023-11-29 05:22:37,217 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 05:22:37,217 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914807845]
[2023-11-29 05:22:37,217 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [914807845] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 05:22:37,217 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 05:22:37,220 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 05:22:37,220 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161777511]
[2023-11-29 05:22:37,220 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 05:22:37,232 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 05:22:37,232 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 05:22:37,242 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 05:22:37,242 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 05:22:37,245 INFO  L87              Difference]: Start difference. First operand 13403 states and 22333 transitions. Second operand  has 4 states, 4 states have (on average 2231.75) internal successors, (8927), 4 states have internal predecessors, (8927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:22:37,565 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 05:22:37,565 INFO  L93              Difference]: Finished difference Result 24944 states and 41564 transitions.
[2023-11-29 05:22:37,566 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 05:22:37,568 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2231.75) internal successors, (8927), 4 states have internal predecessors, (8927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8927
[2023-11-29 05:22:37,572 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 05:22:37,602 INFO  L225             Difference]: With dead ends: 24944
[2023-11-29 05:22:37,603 INFO  L226             Difference]: Without dead ends: 13413
[2023-11-29 05:22:37,613 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8926 GetRequests, 8924 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 05:22:37,614 INFO  L413           NwaCegarLoop]: 20079 mSDtfsCounter, 12 mSDsluCounter, 40148 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 60227 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 05:22:37,614 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 60227 Invalid, 18 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 05:22:37,633 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13413 states.
[2023-11-29 05:22:37,785 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13413 to 13405.
[2023-11-29 05:22:37,800 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13405 states, 13404 states have (on average 1.6662936436884512) internal successors, (22335), 13404 states have internal predecessors, (22335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:22:37,819 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13405 states to 13405 states and 22335 transitions.
[2023-11-29 05:22:37,819 INFO  L78                 Accepts]: Start accepts. Automaton has 13405 states and 22335 transitions. Word has length 8927
[2023-11-29 05:22:37,823 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 05:22:37,823 INFO  L495      AbstractCegarLoop]: Abstraction has 13405 states and 22335 transitions.
[2023-11-29 05:22:37,826 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2231.75) internal successors, (8927), 4 states have internal predecessors, (8927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:22:37,827 INFO  L276                IsEmpty]: Start isEmpty. Operand 13405 states and 22335 transitions.
[2023-11-29 05:22:38,261 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8928
[2023-11-29 05:22:38,261 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 05:22:38,265 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 05:22:38,385 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-29 05:22:38,466 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:22:38,466 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 05:22:38,467 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 05:22:38,469 INFO  L85        PathProgramCache]: Analyzing trace with hash 787190162, now seen corresponding path program 1 times
[2023-11-29 05:22:38,470 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 05:22:38,470 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568341626]
[2023-11-29 05:22:38,470 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:22:38,471 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 05:22:39,507 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 05:22:39,508 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1092911927]
[2023-11-29 05:22:39,509 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:22:39,510 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:22:39,510 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 05:22:39,510 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 05:22:39,511 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-29 05:22:51,197 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 05:22:51,490 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44672 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-29 05:22:51,779 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 05:22:53,141 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 6 proven. 671 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked.
[2023-11-29 05:22:53,142 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 05:22:53,403 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked.
[2023-11-29 05:22:53,404 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 05:22:53,404 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568341626]
[2023-11-29 05:22:53,404 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 05:22:53,404 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092911927]
[2023-11-29 05:22:53,404 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092911927] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 05:22:53,404 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 05:22:53,409 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12
[2023-11-29 05:22:53,410 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955897566]
[2023-11-29 05:22:53,410 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 05:22:53,418 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-29 05:22:53,418 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 05:22:53,423 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-29 05:22:53,424 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132
[2023-11-29 05:22:53,426 INFO  L87              Difference]: Start difference. First operand 13405 states and 22335 transitions. Second operand  has 6 states, 6 states have (on average 1338.3333333333333) internal successors, (8030), 6 states have internal predecessors, (8030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:23:21,207 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 05:23:21,207 INFO  L93              Difference]: Finished difference Result 58320 states and 96775 transitions.
[2023-11-29 05:23:21,207 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-11-29 05:23:21,209 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 1338.3333333333333) internal successors, (8030), 6 states have internal predecessors, (8030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8927
[2023-11-29 05:23:21,220 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 05:23:21,244 INFO  L225             Difference]: With dead ends: 58320
[2023-11-29 05:23:21,244 INFO  L226             Difference]: Without dead ends: 36464
[2023-11-29 05:23:21,260 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17854 GetRequests, 17842 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182
[2023-11-29 05:23:21,261 INFO  L413           NwaCegarLoop]: 31887 mSDtfsCounter, 85173 mSDsluCounter, 77032 mSDsCounter, 0 mSdLazyCounter, 35768 mSolverCounterSat, 1208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85173 SdHoareTripleChecker+Valid, 108919 SdHoareTripleChecker+Invalid, 36976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 1208 IncrementalHoareTripleChecker+Valid, 35768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.4s IncrementalHoareTripleChecker+Time
[2023-11-29 05:23:21,261 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [85173 Valid, 108919 Invalid, 36976 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [1208 Valid, 35768 Invalid, 0 Unknown, 0 Unchecked, 26.4s Time]
[2023-11-29 05:23:21,289 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 36464 states.
[2023-11-29 05:23:21,502 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 36464 to 13405.
[2023-11-29 05:23:21,515 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13405 states, 13404 states have (on average 1.6662936436884512) internal successors, (22335), 13404 states have internal predecessors, (22335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:23:21,534 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13405 states to 13405 states and 22335 transitions.
[2023-11-29 05:23:21,535 INFO  L78                 Accepts]: Start accepts. Automaton has 13405 states and 22335 transitions. Word has length 8927
[2023-11-29 05:23:21,541 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 05:23:21,541 INFO  L495      AbstractCegarLoop]: Abstraction has 13405 states and 22335 transitions.
[2023-11-29 05:23:21,543 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 1338.3333333333333) internal successors, (8030), 6 states have internal predecessors, (8030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:23:21,543 INFO  L276                IsEmpty]: Start isEmpty. Operand 13405 states and 22335 transitions.
[2023-11-29 05:23:21,897 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8929
[2023-11-29 05:23:21,898 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 05:23:21,902 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 05:23:22,028 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2023-11-29 05:23:22,102 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:23:22,103 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 05:23:22,104 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 05:23:22,108 INFO  L85        PathProgramCache]: Analyzing trace with hash 233005518, now seen corresponding path program 1 times
[2023-11-29 05:23:22,108 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 05:23:22,108 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424305848]
[2023-11-29 05:23:22,110 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:23:22,110 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 05:23:23,030 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 05:23:23,030 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114407155]
[2023-11-29 05:23:23,031 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:23:23,032 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:23:23,032 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 05:23:23,033 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 05:23:23,035 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-29 05:23:35,074 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 05:23:35,368 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44675 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 05:23:35,500 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 05:23:36,650 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 8 proven. 671 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked.
[2023-11-29 05:23:36,650 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 05:23:36,822 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 896 trivial. 0 not checked.
[2023-11-29 05:23:36,822 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 05:23:36,823 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424305848]
[2023-11-29 05:23:36,823 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 05:23:36,823 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114407155]
[2023-11-29 05:23:36,823 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114407155] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 05:23:36,823 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 05:23:36,829 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 05:23:36,829 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224352689]
[2023-11-29 05:23:36,829 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 05:23:36,836 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 05:23:36,836 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 05:23:36,842 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 05:23:36,842 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 05:23:36,844 INFO  L87              Difference]: Start difference. First operand 13405 states and 22335 transitions. Second operand  has 5 states, 5 states have (on average 1606.6) internal successors, (8033), 5 states have internal predecessors, (8033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:23:53,834 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 05:23:53,834 INFO  L93              Difference]: Finished difference Result 46794 states and 77567 transitions.
[2023-11-29 05:23:53,834 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 05:23:53,836 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1606.6) internal successors, (8033), 5 states have internal predecessors, (8033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8928
[2023-11-29 05:23:53,844 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 05:23:53,867 INFO  L225             Difference]: With dead ends: 46794
[2023-11-29 05:23:53,867 INFO  L226             Difference]: Without dead ends: 24933
[2023-11-29 05:23:53,879 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17855 GetRequests, 17846 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 05:23:53,880 INFO  L413           NwaCegarLoop]: 31877 mSDtfsCounter, 34784 mSDsluCounter, 48264 mSDsCounter, 0 mSdLazyCounter, 22495 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34784 SdHoareTripleChecker+Valid, 80141 SdHoareTripleChecker+Invalid, 23700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 22495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time
[2023-11-29 05:23:53,880 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34784 Valid, 80141 Invalid, 23700 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [1205 Valid, 22495 Invalid, 0 Unknown, 0 Unchecked, 16.0s Time]
[2023-11-29 05:23:53,907 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24933 states.
[2023-11-29 05:23:54,124 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24933 to 13407.
[2023-11-29 05:23:54,139 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13407 states, 13406 states have (on average 1.6661942413844548) internal successors, (22337), 13406 states have internal predecessors, (22337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:23:54,164 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13407 states to 13407 states and 22337 transitions.
[2023-11-29 05:23:54,164 INFO  L78                 Accepts]: Start accepts. Automaton has 13407 states and 22337 transitions. Word has length 8928
[2023-11-29 05:23:54,173 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 05:23:54,173 INFO  L495      AbstractCegarLoop]: Abstraction has 13407 states and 22337 transitions.
[2023-11-29 05:23:54,175 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1606.6) internal successors, (8033), 5 states have internal predecessors, (8033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:23:54,175 INFO  L276                IsEmpty]: Start isEmpty. Operand 13407 states and 22337 transitions.
[2023-11-29 05:23:54,570 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8930
[2023-11-29 05:23:54,570 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 05:23:54,575 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 05:23:54,702 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2023-11-29 05:23:54,775 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5
[2023-11-29 05:23:54,776 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 05:23:54,776 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 05:23:54,779 INFO  L85        PathProgramCache]: Analyzing trace with hash -441751890, now seen corresponding path program 1 times
[2023-11-29 05:23:54,779 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 05:23:54,779 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352707653]
[2023-11-29 05:23:54,780 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:23:54,780 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 05:23:55,627 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 05:23:55,627 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1891864437]
[2023-11-29 05:23:55,629 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:23:55,629 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:23:55,629 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 05:23:55,630 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 05:23:55,631 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-29 05:24:07,590 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 05:24:07,851 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44679 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 05:24:08,002 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 05:24:09,205 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 10 proven. 671 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked.
[2023-11-29 05:24:09,205 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 05:24:09,371 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 894 trivial. 0 not checked.
[2023-11-29 05:24:09,371 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 05:24:09,371 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352707653]
[2023-11-29 05:24:09,371 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 05:24:09,371 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891864437]
[2023-11-29 05:24:09,371 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891864437] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 05:24:09,372 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 05:24:09,376 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 05:24:09,376 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758577234]
[2023-11-29 05:24:09,376 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 05:24:09,382 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 05:24:09,383 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 05:24:09,388 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 05:24:09,388 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 05:24:09,390 INFO  L87              Difference]: Start difference. First operand 13407 states and 22337 transitions. Second operand  has 5 states, 5 states have (on average 1607.2) internal successors, (8036), 5 states have internal predecessors, (8036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:24:24,321 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 05:24:24,321 INFO  L93              Difference]: Finished difference Result 46802 states and 77575 transitions.
[2023-11-29 05:24:24,322 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 05:24:24,323 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1607.2) internal successors, (8036), 5 states have internal predecessors, (8036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8929
[2023-11-29 05:24:24,330 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 05:24:24,404 INFO  L225             Difference]: With dead ends: 46802
[2023-11-29 05:24:24,404 INFO  L226             Difference]: Without dead ends: 24934
[2023-11-29 05:24:24,419 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17857 GetRequests, 17848 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 05:24:24,420 INFO  L413           NwaCegarLoop]: 31869 mSDtfsCounter, 50362 mSDsluCounter, 31637 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50362 SdHoareTripleChecker+Valid, 63506 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time
[2023-11-29 05:24:24,421 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50362 Valid, 63506 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 14.2s Time]
[2023-11-29 05:24:24,444 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24934 states.
[2023-11-29 05:24:24,601 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24934 to 13409.
[2023-11-29 05:24:24,614 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13409 states, 13408 states have (on average 1.6660948687350836) internal successors, (22339), 13408 states have internal predecessors, (22339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:24:24,632 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13409 states to 13409 states and 22339 transitions.
[2023-11-29 05:24:24,632 INFO  L78                 Accepts]: Start accepts. Automaton has 13409 states and 22339 transitions. Word has length 8929
[2023-11-29 05:24:24,638 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 05:24:24,638 INFO  L495      AbstractCegarLoop]: Abstraction has 13409 states and 22339 transitions.
[2023-11-29 05:24:24,640 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1607.2) internal successors, (8036), 5 states have internal predecessors, (8036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:24:24,640 INFO  L276                IsEmpty]: Start isEmpty. Operand 13409 states and 22339 transitions.
[2023-11-29 05:24:25,043 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8931
[2023-11-29 05:24:25,044 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 05:24:25,048 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 05:24:25,173 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0
[2023-11-29 05:24:25,249 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:24:25,249 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 05:24:25,250 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 05:24:25,253 INFO  L85        PathProgramCache]: Analyzing trace with hash 865512374, now seen corresponding path program 1 times
[2023-11-29 05:24:25,253 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 05:24:25,253 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142324145]
[2023-11-29 05:24:25,254 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:24:25,254 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 05:24:26,064 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 05:24:26,065 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085495346]
[2023-11-29 05:24:26,066 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:24:26,066 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:24:26,066 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 05:24:26,067 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 05:24:26,068 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-29 05:24:37,812 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 05:24:38,115 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44682 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 05:24:38,240 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 05:24:39,370 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 12 proven. 671 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked.
[2023-11-29 05:24:39,370 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 05:24:39,737 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 892 trivial. 0 not checked.
[2023-11-29 05:24:39,737 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 05:24:39,737 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142324145]
[2023-11-29 05:24:39,738 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 05:24:39,738 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085495346]
[2023-11-29 05:24:39,738 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085495346] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 05:24:39,738 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 05:24:39,742 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 05:24:39,743 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711308185]
[2023-11-29 05:24:39,743 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 05:24:39,749 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 05:24:39,750 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 05:24:39,755 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 05:24:39,755 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 05:24:39,757 INFO  L87              Difference]: Start difference. First operand 13409 states and 22339 transitions. Second operand  has 5 states, 5 states have (on average 1607.8) internal successors, (8039), 5 states have internal predecessors, (8039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:24:54,504 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 05:24:54,504 INFO  L93              Difference]: Finished difference Result 46810 states and 77583 transitions.
[2023-11-29 05:24:54,505 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 05:24:54,506 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1607.8) internal successors, (8039), 5 states have internal predecessors, (8039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8930
[2023-11-29 05:24:54,512 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 05:24:54,527 INFO  L225             Difference]: With dead ends: 46810
[2023-11-29 05:24:54,527 INFO  L226             Difference]: Without dead ends: 24935
[2023-11-29 05:24:54,535 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17859 GetRequests, 17850 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 05:24:54,536 INFO  L413           NwaCegarLoop]: 31861 mSDtfsCounter, 50350 mSDsluCounter, 31633 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50350 SdHoareTripleChecker+Valid, 63494 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time
[2023-11-29 05:24:54,536 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50350 Valid, 63494 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 14.0s Time]
[2023-11-29 05:24:54,557 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24935 states.
[2023-11-29 05:24:54,682 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24935 to 13411.
[2023-11-29 05:24:54,695 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13411 states, 13410 states have (on average 1.6659955257270693) internal successors, (22341), 13410 states have internal predecessors, (22341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:24:54,713 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13411 states to 13411 states and 22341 transitions.
[2023-11-29 05:24:54,713 INFO  L78                 Accepts]: Start accepts. Automaton has 13411 states and 22341 transitions. Word has length 8930
[2023-11-29 05:24:54,718 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 05:24:54,718 INFO  L495      AbstractCegarLoop]: Abstraction has 13411 states and 22341 transitions.
[2023-11-29 05:24:54,720 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1607.8) internal successors, (8039), 5 states have internal predecessors, (8039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:24:54,720 INFO  L276                IsEmpty]: Start isEmpty. Operand 13411 states and 22341 transitions.
[2023-11-29 05:24:55,031 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8932
[2023-11-29 05:24:55,032 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 05:24:55,035 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 05:24:55,160 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0
[2023-11-29 05:24:55,235 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:24:55,236 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 05:24:55,236 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 05:24:55,239 INFO  L85        PathProgramCache]: Analyzing trace with hash -779916088, now seen corresponding path program 1 times
[2023-11-29 05:24:55,239 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 05:24:55,239 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913414819]
[2023-11-29 05:24:55,240 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:24:55,240 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 05:24:56,097 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 05:24:56,098 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [683296220]
[2023-11-29 05:24:56,099 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:24:56,099 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:24:56,099 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 05:24:56,100 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 05:24:56,101 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-29 05:25:07,884 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 05:25:08,191 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44685 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 05:25:08,315 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 05:25:09,546 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 14 proven. 671 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked.
[2023-11-29 05:25:09,546 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 05:25:09,815 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 890 trivial. 0 not checked.
[2023-11-29 05:25:09,815 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 05:25:09,816 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913414819]
[2023-11-29 05:25:09,816 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 05:25:09,816 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683296220]
[2023-11-29 05:25:09,816 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [683296220] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 05:25:09,816 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 05:25:09,822 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 05:25:09,823 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717101058]
[2023-11-29 05:25:09,823 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 05:25:09,831 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 05:25:09,832 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 05:25:09,839 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 05:25:09,840 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 05:25:09,842 INFO  L87              Difference]: Start difference. First operand 13411 states and 22341 transitions. Second operand  has 5 states, 5 states have (on average 1608.4) internal successors, (8042), 5 states have internal predecessors, (8042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:25:27,507 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 05:25:27,508 INFO  L93              Difference]: Finished difference Result 46818 states and 77591 transitions.
[2023-11-29 05:25:27,508 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 05:25:27,510 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1608.4) internal successors, (8042), 5 states have internal predecessors, (8042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8931
[2023-11-29 05:25:27,519 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 05:25:27,544 INFO  L225             Difference]: With dead ends: 46818
[2023-11-29 05:25:27,544 INFO  L226             Difference]: Without dead ends: 24936
[2023-11-29 05:25:27,560 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17861 GetRequests, 17852 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 05:25:27,561 INFO  L413           NwaCegarLoop]: 31853 mSDtfsCounter, 34766 mSDsluCounter, 48234 mSDsCounter, 0 mSdLazyCounter, 22495 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34766 SdHoareTripleChecker+Valid, 80087 SdHoareTripleChecker+Invalid, 23700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 22495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.6s IncrementalHoareTripleChecker+Time
[2023-11-29 05:25:27,561 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34766 Valid, 80087 Invalid, 23700 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [1205 Valid, 22495 Invalid, 0 Unknown, 0 Unchecked, 16.6s Time]
[2023-11-29 05:25:27,592 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24936 states.
[2023-11-29 05:25:27,779 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24936 to 13413.
[2023-11-29 05:25:27,792 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13413 states, 13412 states have (on average 1.665896212347152) internal successors, (22343), 13412 states have internal predecessors, (22343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:25:27,817 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13413 states to 13413 states and 22343 transitions.
[2023-11-29 05:25:27,817 INFO  L78                 Accepts]: Start accepts. Automaton has 13413 states and 22343 transitions. Word has length 8931
[2023-11-29 05:25:27,824 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 05:25:27,824 INFO  L495      AbstractCegarLoop]: Abstraction has 13413 states and 22343 transitions.
[2023-11-29 05:25:27,826 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1608.4) internal successors, (8042), 5 states have internal predecessors, (8042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:25:27,826 INFO  L276                IsEmpty]: Start isEmpty. Operand 13413 states and 22343 transitions.
[2023-11-29 05:25:28,428 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8933
[2023-11-29 05:25:28,428 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 05:25:28,432 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 05:25:28,557 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0
[2023-11-29 05:25:28,633 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:25:28,633 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 05:25:28,633 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 05:25:28,636 INFO  L85        PathProgramCache]: Analyzing trace with hash -1504372068, now seen corresponding path program 1 times
[2023-11-29 05:25:28,636 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 05:25:28,636 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079341904]
[2023-11-29 05:25:28,637 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:25:28,637 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 05:25:29,736 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 05:25:29,736 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2048023204]
[2023-11-29 05:25:29,738 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:25:29,738 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:25:29,738 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 05:25:29,739 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 05:25:29,740 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-29 05:25:41,613 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 05:25:41,912 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44688 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 05:25:42,037 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 05:25:43,060 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 16 proven. 671 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked.
[2023-11-29 05:25:43,060 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 05:25:43,482 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 888 trivial. 0 not checked.
[2023-11-29 05:25:43,482 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 05:25:43,482 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079341904]
[2023-11-29 05:25:43,483 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 05:25:43,483 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048023204]
[2023-11-29 05:25:43,483 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048023204] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 05:25:43,483 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 05:25:43,487 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 05:25:43,487 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678285019]
[2023-11-29 05:25:43,488 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 05:25:43,495 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 05:25:43,495 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 05:25:43,501 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 05:25:43,501 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 05:25:43,504 INFO  L87              Difference]: Start difference. First operand 13413 states and 22343 transitions. Second operand  has 5 states, 5 states have (on average 1609.0) internal successors, (8045), 5 states have internal predecessors, (8045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:25:58,227 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 05:25:58,227 INFO  L93              Difference]: Finished difference Result 46826 states and 77599 transitions.
[2023-11-29 05:25:58,227 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 05:25:58,229 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1609.0) internal successors, (8045), 5 states have internal predecessors, (8045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8932
[2023-11-29 05:25:58,236 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 05:25:58,257 INFO  L225             Difference]: With dead ends: 46826
[2023-11-29 05:25:58,257 INFO  L226             Difference]: Without dead ends: 24937
[2023-11-29 05:25:58,271 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17863 GetRequests, 17854 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 05:25:58,271 INFO  L413           NwaCegarLoop]: 31845 mSDtfsCounter, 50338 mSDsluCounter, 31622 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50338 SdHoareTripleChecker+Valid, 63467 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time
[2023-11-29 05:25:58,272 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50338 Valid, 63467 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 13.9s Time]
[2023-11-29 05:25:58,297 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24937 states.
[2023-11-29 05:25:58,443 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24937 to 13415.
[2023-11-29 05:25:58,455 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13415 states, 13414 states have (on average 1.6657969285820784) internal successors, (22345), 13414 states have internal predecessors, (22345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:25:58,473 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13415 states to 13415 states and 22345 transitions.
[2023-11-29 05:25:58,473 INFO  L78                 Accepts]: Start accepts. Automaton has 13415 states and 22345 transitions. Word has length 8932
[2023-11-29 05:25:58,478 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 05:25:58,478 INFO  L495      AbstractCegarLoop]: Abstraction has 13415 states and 22345 transitions.
[2023-11-29 05:25:58,480 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1609.0) internal successors, (8045), 5 states have internal predecessors, (8045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:25:58,480 INFO  L276                IsEmpty]: Start isEmpty. Operand 13415 states and 22345 transitions.
[2023-11-29 05:25:58,873 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8934
[2023-11-29 05:25:58,873 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 05:25:58,875 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 05:25:59,000 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0
[2023-11-29 05:25:59,075 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2023-11-29 05:25:59,076 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 05:25:59,077 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 05:25:59,079 INFO  L85        PathProgramCache]: Analyzing trace with hash 134965988, now seen corresponding path program 1 times
[2023-11-29 05:25:59,079 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 05:25:59,079 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27753103]
[2023-11-29 05:25:59,080 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:25:59,080 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 05:25:59,890 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 05:25:59,890 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042557014]
[2023-11-29 05:25:59,891 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:25:59,891 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:25:59,892 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 05:25:59,892 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 05:25:59,893 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-11-29 05:26:12,017 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 05:26:12,311 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44692 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 05:26:12,420 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 05:26:13,654 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 18 proven. 671 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked.
[2023-11-29 05:26:13,654 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 05:26:13,834 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked.
[2023-11-29 05:26:13,834 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 05:26:13,834 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27753103]
[2023-11-29 05:26:13,834 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 05:26:13,834 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042557014]
[2023-11-29 05:26:13,834 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042557014] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 05:26:13,834 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 05:26:13,839 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 05:26:13,839 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602177874]
[2023-11-29 05:26:13,839 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 05:26:13,845 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 05:26:13,845 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 05:26:13,849 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 05:26:13,849 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 05:26:13,851 INFO  L87              Difference]: Start difference. First operand 13415 states and 22345 transitions. Second operand  has 5 states, 5 states have (on average 1609.6) internal successors, (8048), 5 states have internal predecessors, (8048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:26:28,608 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 05:26:28,608 INFO  L93              Difference]: Finished difference Result 46834 states and 77607 transitions.
[2023-11-29 05:26:28,609 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 05:26:28,610 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1609.6) internal successors, (8048), 5 states have internal predecessors, (8048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8933
[2023-11-29 05:26:28,617 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 05:26:28,638 INFO  L225             Difference]: With dead ends: 46834
[2023-11-29 05:26:28,638 INFO  L226             Difference]: Without dead ends: 24938
[2023-11-29 05:26:28,645 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17865 GetRequests, 17856 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 05:26:28,646 INFO  L413           NwaCegarLoop]: 31837 mSDtfsCounter, 50330 mSDsluCounter, 31617 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50330 SdHoareTripleChecker+Valid, 63454 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time
[2023-11-29 05:26:28,646 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50330 Valid, 63454 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 14.0s Time]
[2023-11-29 05:26:28,667 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24938 states.
[2023-11-29 05:26:28,801 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24938 to 13417.
[2023-11-29 05:26:28,813 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13417 states, 13416 states have (on average 1.6656976744186047) internal successors, (22347), 13416 states have internal predecessors, (22347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:26:28,832 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13417 states to 13417 states and 22347 transitions.
[2023-11-29 05:26:28,832 INFO  L78                 Accepts]: Start accepts. Automaton has 13417 states and 22347 transitions. Word has length 8933
[2023-11-29 05:26:28,839 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 05:26:28,839 INFO  L495      AbstractCegarLoop]: Abstraction has 13417 states and 22347 transitions.
[2023-11-29 05:26:28,841 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1609.6) internal successors, (8048), 5 states have internal predecessors, (8048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:26:28,841 INFO  L276                IsEmpty]: Start isEmpty. Operand 13417 states and 22347 transitions.
[2023-11-29 05:26:29,242 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8935
[2023-11-29 05:26:29,242 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 05:26:29,244 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 05:26:29,367 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0
[2023-11-29 05:26:29,444 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10
[2023-11-29 05:26:29,444 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 05:26:29,445 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 05:26:29,448 INFO  L85        PathProgramCache]: Analyzing trace with hash 1089746308, now seen corresponding path program 1 times
[2023-11-29 05:26:29,448 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 05:26:29,448 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136469638]
[2023-11-29 05:26:29,450 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:26:29,450 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 05:26:30,296 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 05:26:30,296 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [451088237]
[2023-11-29 05:26:30,297 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:26:30,297 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:26:30,298 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 05:26:30,298 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 05:26:30,299 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-11-29 05:26:42,102 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 05:26:42,401 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44695 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 05:26:42,511 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 05:26:43,724 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 20 proven. 671 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked.
[2023-11-29 05:26:43,724 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 05:26:43,881 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 884 trivial. 0 not checked.
[2023-11-29 05:26:43,882 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 05:26:43,882 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136469638]
[2023-11-29 05:26:43,882 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 05:26:43,882 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451088237]
[2023-11-29 05:26:43,882 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [451088237] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 05:26:43,882 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 05:26:43,888 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 05:26:43,888 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651190246]
[2023-11-29 05:26:43,888 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 05:26:43,892 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 05:26:43,893 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 05:26:43,897 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 05:26:43,897 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 05:26:43,899 INFO  L87              Difference]: Start difference. First operand 13417 states and 22347 transitions. Second operand  has 5 states, 5 states have (on average 1610.2) internal successors, (8051), 5 states have internal predecessors, (8051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:27:00,775 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 05:27:00,775 INFO  L93              Difference]: Finished difference Result 46842 states and 77615 transitions.
[2023-11-29 05:27:00,776 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 05:27:00,777 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1610.2) internal successors, (8051), 5 states have internal predecessors, (8051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8934
[2023-11-29 05:27:00,783 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 05:27:00,799 INFO  L225             Difference]: With dead ends: 46842
[2023-11-29 05:27:00,799 INFO  L226             Difference]: Without dead ends: 24939
[2023-11-29 05:27:00,805 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17867 GetRequests, 17858 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 05:27:00,806 INFO  L413           NwaCegarLoop]: 31829 mSDtfsCounter, 34748 mSDsluCounter, 48204 mSDsCounter, 0 mSdLazyCounter, 22495 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34748 SdHoareTripleChecker+Valid, 80033 SdHoareTripleChecker+Invalid, 23700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 22495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time
[2023-11-29 05:27:00,806 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34748 Valid, 80033 Invalid, 23700 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [1205 Valid, 22495 Invalid, 0 Unknown, 0 Unchecked, 15.9s Time]
[2023-11-29 05:27:00,826 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24939 states.
[2023-11-29 05:27:00,949 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24939 to 13419.
[2023-11-29 05:27:00,961 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13419 states, 13418 states have (on average 1.665598449843494) internal successors, (22349), 13418 states have internal predecessors, (22349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:27:00,980 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13419 states to 13419 states and 22349 transitions.
[2023-11-29 05:27:00,980 INFO  L78                 Accepts]: Start accepts. Automaton has 13419 states and 22349 transitions. Word has length 8934
[2023-11-29 05:27:00,985 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 05:27:00,985 INFO  L495      AbstractCegarLoop]: Abstraction has 13419 states and 22349 transitions.
[2023-11-29 05:27:00,987 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1610.2) internal successors, (8051), 5 states have internal predecessors, (8051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:27:00,987 INFO  L276                IsEmpty]: Start isEmpty. Operand 13419 states and 22349 transitions.
[2023-11-29 05:27:01,300 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8936
[2023-11-29 05:27:01,300 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 05:27:01,302 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 05:27:01,427 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0
[2023-11-29 05:27:01,502 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:27:01,503 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 05:27:01,503 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 05:27:01,505 INFO  L85        PathProgramCache]: Analyzing trace with hash 267603198, now seen corresponding path program 1 times
[2023-11-29 05:27:01,505 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 05:27:01,505 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084600211]
[2023-11-29 05:27:01,505 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:27:01,506 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 05:27:02,401 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 05:27:02,401 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [826416562]
[2023-11-29 05:27:02,403 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:27:02,403 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:27:02,403 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 05:27:02,404 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 05:27:02,405 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2023-11-29 05:27:13,761 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 05:27:14,077 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44698 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 05:27:14,191 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 05:27:15,396 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 22 proven. 671 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked.
[2023-11-29 05:27:15,396 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 05:27:15,555 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked.
[2023-11-29 05:27:15,555 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 05:27:15,555 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084600211]
[2023-11-29 05:27:15,555 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 05:27:15,555 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826416562]
[2023-11-29 05:27:15,555 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [826416562] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 05:27:15,555 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 05:27:15,561 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 05:27:15,561 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104565305]
[2023-11-29 05:27:15,561 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 05:27:15,566 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 05:27:15,566 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 05:27:15,570 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 05:27:15,570 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 05:27:15,572 INFO  L87              Difference]: Start difference. First operand 13419 states and 22349 transitions. Second operand  has 5 states, 5 states have (on average 1610.8) internal successors, (8054), 5 states have internal predecessors, (8054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:27:32,791 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 05:27:32,791 INFO  L93              Difference]: Finished difference Result 46850 states and 77623 transitions.
[2023-11-29 05:27:32,791 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 05:27:32,792 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1610.8) internal successors, (8054), 5 states have internal predecessors, (8054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8935
[2023-11-29 05:27:32,798 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 05:27:32,814 INFO  L225             Difference]: With dead ends: 46850
[2023-11-29 05:27:32,814 INFO  L226             Difference]: Without dead ends: 24940
[2023-11-29 05:27:32,823 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17869 GetRequests, 17860 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 05:27:32,823 INFO  L413           NwaCegarLoop]: 31821 mSDtfsCounter, 34742 mSDsluCounter, 48194 mSDsCounter, 0 mSdLazyCounter, 22495 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34742 SdHoareTripleChecker+Valid, 80015 SdHoareTripleChecker+Invalid, 23700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 22495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time
[2023-11-29 05:27:32,824 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34742 Valid, 80015 Invalid, 23700 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 22495 Invalid, 0 Unknown, 0 Unchecked, 16.4s Time]
[2023-11-29 05:27:32,845 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24940 states.
[2023-11-29 05:27:32,966 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24940 to 13421.
[2023-11-29 05:27:32,978 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13421 states, 13420 states have (on average 1.6654992548435172) internal successors, (22351), 13420 states have internal predecessors, (22351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:27:32,996 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13421 states to 13421 states and 22351 transitions.
[2023-11-29 05:27:32,996 INFO  L78                 Accepts]: Start accepts. Automaton has 13421 states and 22351 transitions. Word has length 8935
[2023-11-29 05:27:33,000 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 05:27:33,000 INFO  L495      AbstractCegarLoop]: Abstraction has 13421 states and 22351 transitions.
[2023-11-29 05:27:33,002 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1610.8) internal successors, (8054), 5 states have internal predecessors, (8054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:27:33,002 INFO  L276                IsEmpty]: Start isEmpty. Operand 13421 states and 22351 transitions.
[2023-11-29 05:27:33,309 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8937
[2023-11-29 05:27:33,309 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 05:27:33,311 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 05:27:33,433 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0
[2023-11-29 05:27:33,511 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:27:33,512 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 05:27:33,512 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 05:27:33,514 INFO  L85        PathProgramCache]: Analyzing trace with hash -605968278, now seen corresponding path program 1 times
[2023-11-29 05:27:33,514 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 05:27:33,514 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306412196]
[2023-11-29 05:27:33,515 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:27:33,515 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 05:27:34,322 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 05:27:34,322 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035636397]
[2023-11-29 05:27:34,324 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:27:34,324 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:27:34,324 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 05:27:34,325 INFO  L229       MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 05:27:34,327 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2023-11-29 05:27:46,408 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 05:27:46,701 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44701 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 05:27:46,811 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 05:27:47,897 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 24 proven. 671 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked.
[2023-11-29 05:27:47,897 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 05:27:48,309 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked.
[2023-11-29 05:27:48,309 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 05:27:48,309 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306412196]
[2023-11-29 05:27:48,309 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 05:27:48,309 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035636397]
[2023-11-29 05:27:48,309 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035636397] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 05:27:48,310 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 05:27:48,316 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 05:27:48,316 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104047536]
[2023-11-29 05:27:48,316 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 05:27:48,323 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 05:27:48,323 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 05:27:48,329 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 05:27:48,329 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 05:27:48,331 INFO  L87              Difference]: Start difference. First operand 13421 states and 22351 transitions. Second operand  has 5 states, 5 states have (on average 1611.4) internal successors, (8057), 5 states have internal predecessors, (8057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:28:03,807 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 05:28:03,807 INFO  L93              Difference]: Finished difference Result 46858 states and 77631 transitions.
[2023-11-29 05:28:03,808 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 05:28:03,810 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1611.4) internal successors, (8057), 5 states have internal predecessors, (8057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8936
[2023-11-29 05:28:03,817 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 05:28:03,838 INFO  L225             Difference]: With dead ends: 46858
[2023-11-29 05:28:03,838 INFO  L226             Difference]: Without dead ends: 24941
[2023-11-29 05:28:03,851 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17871 GetRequests, 17862 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 05:28:03,852 INFO  L413           NwaCegarLoop]: 31813 mSDtfsCounter, 50296 mSDsluCounter, 31603 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50296 SdHoareTripleChecker+Valid, 63416 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time
[2023-11-29 05:28:03,852 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50296 Valid, 63416 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 14.6s Time]
[2023-11-29 05:28:03,876 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24941 states.
[2023-11-29 05:28:04,215 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24941 to 13423.
[2023-11-29 05:28:04,222 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13423 states, 13422 states have (on average 1.6654000894054537) internal successors, (22353), 13422 states have internal predecessors, (22353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:28:04,239 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13423 states to 13423 states and 22353 transitions.
[2023-11-29 05:28:04,239 INFO  L78                 Accepts]: Start accepts. Automaton has 13423 states and 22353 transitions. Word has length 8936
[2023-11-29 05:28:04,244 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 05:28:04,244 INFO  L495      AbstractCegarLoop]: Abstraction has 13423 states and 22353 transitions.
[2023-11-29 05:28:04,246 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1611.4) internal successors, (8057), 5 states have internal predecessors, (8057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:28:04,246 INFO  L276                IsEmpty]: Start isEmpty. Operand 13423 states and 22353 transitions.
[2023-11-29 05:28:04,561 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8938
[2023-11-29 05:28:04,561 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 05:28:04,564 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 05:28:04,700 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0
[2023-11-29 05:28:04,764 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13
[2023-11-29 05:28:04,765 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 05:28:04,766 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 05:28:04,768 INFO  L85        PathProgramCache]: Analyzing trace with hash -509840358, now seen corresponding path program 1 times
[2023-11-29 05:28:04,768 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 05:28:04,769 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734593193]
[2023-11-29 05:28:04,771 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:28:04,772 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 05:28:05,633 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 05:28:05,633 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [760674297]
[2023-11-29 05:28:05,635 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:28:05,635 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:28:05,635 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 05:28:05,636 INFO  L229       MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 05:28:05,637 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2023-11-29 05:28:17,661 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 05:28:17,939 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44705 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 05:28:18,047 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 05:28:19,133 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 26 proven. 671 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked.
[2023-11-29 05:28:19,134 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 05:28:19,297 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 878 trivial. 0 not checked.
[2023-11-29 05:28:19,297 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 05:28:19,297 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734593193]
[2023-11-29 05:28:19,297 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 05:28:19,297 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760674297]
[2023-11-29 05:28:19,298 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [760674297] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 05:28:19,298 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 05:28:19,304 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 05:28:19,304 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841882919]
[2023-11-29 05:28:19,304 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 05:28:19,309 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 05:28:19,309 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 05:28:19,313 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 05:28:19,313 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 05:28:19,315 INFO  L87              Difference]: Start difference. First operand 13423 states and 22353 transitions. Second operand  has 5 states, 5 states have (on average 1612.0) internal successors, (8060), 5 states have internal predecessors, (8060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:28:34,043 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 05:28:34,043 INFO  L93              Difference]: Finished difference Result 46866 states and 77639 transitions.
[2023-11-29 05:28:34,044 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 05:28:34,045 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1612.0) internal successors, (8060), 5 states have internal predecessors, (8060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8937
[2023-11-29 05:28:34,052 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 05:28:34,071 INFO  L225             Difference]: With dead ends: 46866
[2023-11-29 05:28:34,071 INFO  L226             Difference]: Without dead ends: 24942
[2023-11-29 05:28:34,082 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17873 GetRequests, 17864 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 05:28:34,083 INFO  L413           NwaCegarLoop]: 31805 mSDtfsCounter, 50287 mSDsluCounter, 31598 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50287 SdHoareTripleChecker+Valid, 63403 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time
[2023-11-29 05:28:34,083 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50287 Valid, 63403 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 13.9s Time]
[2023-11-29 05:28:34,104 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24942 states.
[2023-11-29 05:28:34,225 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24942 to 13425.
[2023-11-29 05:28:34,236 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13425 states, 13424 states have (on average 1.6653009535160905) internal successors, (22355), 13424 states have internal predecessors, (22355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:28:34,252 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13425 states to 13425 states and 22355 transitions.
[2023-11-29 05:28:34,252 INFO  L78                 Accepts]: Start accepts. Automaton has 13425 states and 22355 transitions. Word has length 8937
[2023-11-29 05:28:34,256 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 05:28:34,256 INFO  L495      AbstractCegarLoop]: Abstraction has 13425 states and 22355 transitions.
[2023-11-29 05:28:34,257 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1612.0) internal successors, (8060), 5 states have internal predecessors, (8060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:28:34,257 INFO  L276                IsEmpty]: Start isEmpty. Operand 13425 states and 22355 transitions.
[2023-11-29 05:28:34,646 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8939
[2023-11-29 05:28:34,646 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 05:28:34,648 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 05:28:34,762 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0
[2023-11-29 05:28:34,848 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2023-11-29 05:28:34,849 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 05:28:34,850 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 05:28:34,851 INFO  L85        PathProgramCache]: Analyzing trace with hash -1178823598, now seen corresponding path program 1 times
[2023-11-29 05:28:34,851 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 05:28:34,851 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798437281]
[2023-11-29 05:28:34,852 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:28:34,852 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 05:28:35,621 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 05:28:35,621 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [264737437]
[2023-11-29 05:28:35,622 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:28:35,622 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:28:35,623 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 05:28:35,623 INFO  L229       MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 05:28:35,624 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2023-11-29 05:28:47,235 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 05:28:47,517 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44708 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 05:28:47,864 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 05:28:48,872 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 28 proven. 671 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked.
[2023-11-29 05:28:48,872 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 05:28:49,037 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked.
[2023-11-29 05:28:49,038 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 05:28:49,038 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798437281]
[2023-11-29 05:28:49,038 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 05:28:49,038 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264737437]
[2023-11-29 05:28:49,038 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [264737437] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 05:28:49,038 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 05:28:49,042 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 05:28:49,043 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082895169]
[2023-11-29 05:28:49,043 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 05:28:49,047 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 05:28:49,047 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 05:28:49,051 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 05:28:49,051 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 05:28:49,053 INFO  L87              Difference]: Start difference. First operand 13425 states and 22355 transitions. Second operand  has 5 states, 5 states have (on average 1612.6) internal successors, (8063), 5 states have internal predecessors, (8063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:29:03,502 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 05:29:03,502 INFO  L93              Difference]: Finished difference Result 46874 states and 77647 transitions.
[2023-11-29 05:29:03,503 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 05:29:03,504 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1612.6) internal successors, (8063), 5 states have internal predecessors, (8063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8938
[2023-11-29 05:29:03,509 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 05:29:03,525 INFO  L225             Difference]: With dead ends: 46874
[2023-11-29 05:29:03,526 INFO  L226             Difference]: Without dead ends: 24943
[2023-11-29 05:29:03,534 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17875 GetRequests, 17866 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 05:29:03,534 INFO  L413           NwaCegarLoop]: 31797 mSDtfsCounter, 50290 mSDsluCounter, 31592 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50290 SdHoareTripleChecker+Valid, 63389 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time
[2023-11-29 05:29:03,535 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50290 Valid, 63389 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 13.7s Time]
[2023-11-29 05:29:03,554 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24943 states.
[2023-11-29 05:29:03,666 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24943 to 13427.
[2023-11-29 05:29:03,677 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13427 states, 13426 states have (on average 1.6652018471622225) internal successors, (22357), 13426 states have internal predecessors, (22357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:29:03,693 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13427 states to 13427 states and 22357 transitions.
[2023-11-29 05:29:03,693 INFO  L78                 Accepts]: Start accepts. Automaton has 13427 states and 22357 transitions. Word has length 8938
[2023-11-29 05:29:03,697 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 05:29:03,697 INFO  L495      AbstractCegarLoop]: Abstraction has 13427 states and 22357 transitions.
[2023-11-29 05:29:03,699 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1612.6) internal successors, (8063), 5 states have internal predecessors, (8063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:29:03,699 INFO  L276                IsEmpty]: Start isEmpty. Operand 13427 states and 22357 transitions.
[2023-11-29 05:29:04,004 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8940
[2023-11-29 05:29:04,004 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 05:29:04,005 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 05:29:04,118 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0
[2023-11-29 05:29:04,206 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:29:04,206 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 05:29:04,206 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 05:29:04,208 INFO  L85        PathProgramCache]: Analyzing trace with hash -229068236, now seen corresponding path program 1 times
[2023-11-29 05:29:04,209 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 05:29:04,209 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356842202]
[2023-11-29 05:29:04,210 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:29:04,211 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 05:29:04,971 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 05:29:04,971 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485473954]
[2023-11-29 05:29:04,972 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:29:04,973 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:29:04,973 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 05:29:04,973 INFO  L229       MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 05:29:04,974 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2023-11-29 05:29:16,532 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 05:29:16,803 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44711 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 05:29:16,899 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 05:29:17,890 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 30 proven. 671 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked.
[2023-11-29 05:29:17,891 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 05:29:18,260 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked.
[2023-11-29 05:29:18,260 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 05:29:18,260 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356842202]
[2023-11-29 05:29:18,260 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 05:29:18,260 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485473954]
[2023-11-29 05:29:18,260 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485473954] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 05:29:18,260 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 05:29:18,265 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 05:29:18,265 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672714934]
[2023-11-29 05:29:18,265 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 05:29:18,269 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 05:29:18,269 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 05:29:18,274 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 05:29:18,275 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 05:29:18,277 INFO  L87              Difference]: Start difference. First operand 13427 states and 22357 transitions. Second operand  has 5 states, 5 states have (on average 1613.2) internal successors, (8066), 5 states have internal predecessors, (8066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:29:34,566 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 05:29:34,566 INFO  L93              Difference]: Finished difference Result 46882 states and 77655 transitions.
[2023-11-29 05:29:34,567 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 05:29:34,568 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1613.2) internal successors, (8066), 5 states have internal predecessors, (8066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8939
[2023-11-29 05:29:34,574 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 05:29:34,589 INFO  L225             Difference]: With dead ends: 46882
[2023-11-29 05:29:34,589 INFO  L226             Difference]: Without dead ends: 24944
[2023-11-29 05:29:34,595 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17877 GetRequests, 17868 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 05:29:34,595 INFO  L413           NwaCegarLoop]: 31789 mSDtfsCounter, 34731 mSDsluCounter, 45930 mSDsCounter, 0 mSdLazyCounter, 21619 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34731 SdHoareTripleChecker+Valid, 77719 SdHoareTripleChecker+Invalid, 22824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 21619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time
[2023-11-29 05:29:34,595 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34731 Valid, 77719 Invalid, 22824 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 21619 Invalid, 0 Unknown, 0 Unchecked, 15.5s Time]
[2023-11-29 05:29:34,614 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24944 states.
[2023-11-29 05:29:34,721 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24944 to 13429.
[2023-11-29 05:29:34,732 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13429 states, 13428 states have (on average 1.6651027703306525) internal successors, (22359), 13428 states have internal predecessors, (22359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:29:34,747 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13429 states to 13429 states and 22359 transitions.
[2023-11-29 05:29:34,747 INFO  L78                 Accepts]: Start accepts. Automaton has 13429 states and 22359 transitions. Word has length 8939
[2023-11-29 05:29:34,751 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 05:29:34,751 INFO  L495      AbstractCegarLoop]: Abstraction has 13429 states and 22359 transitions.
[2023-11-29 05:29:34,753 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1613.2) internal successors, (8066), 5 states have internal predecessors, (8066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:29:34,753 INFO  L276                IsEmpty]: Start isEmpty. Operand 13429 states and 22359 transitions.
[2023-11-29 05:29:35,057 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8941
[2023-11-29 05:29:35,057 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 05:29:35,059 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 05:29:35,170 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0
[2023-11-29 05:29:35,259 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:29:35,260 INFO  L420      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 05:29:35,260 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 05:29:35,261 INFO  L85        PathProgramCache]: Analyzing trace with hash -23819464, now seen corresponding path program 1 times
[2023-11-29 05:29:35,261 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 05:29:35,261 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769610470]
[2023-11-29 05:29:35,262 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:29:35,262 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 05:29:36,127 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 05:29:36,127 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [975298441]
[2023-11-29 05:29:36,129 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:29:36,129 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:29:36,129 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 05:29:36,130 INFO  L229       MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 05:29:36,130 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process
[2023-11-29 05:29:47,306 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 05:29:47,585 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44714 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 05:29:47,687 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 05:29:48,911 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 32 proven. 671 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked.
[2023-11-29 05:29:48,911 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 05:29:49,090 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 872 trivial. 0 not checked.
[2023-11-29 05:29:49,090 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 05:29:49,090 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769610470]
[2023-11-29 05:29:49,090 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 05:29:49,090 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975298441]
[2023-11-29 05:29:49,090 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [975298441] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 05:29:49,090 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 05:29:49,096 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 05:29:49,096 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412494871]
[2023-11-29 05:29:49,096 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 05:29:49,100 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 05:29:49,100 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 05:29:49,104 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 05:29:49,104 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 05:29:49,106 INFO  L87              Difference]: Start difference. First operand 13429 states and 22359 transitions. Second operand  has 5 states, 5 states have (on average 1613.8) internal successors, (8069), 5 states have internal predecessors, (8069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:30:05,811 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 05:30:05,811 INFO  L93              Difference]: Finished difference Result 46890 states and 77663 transitions.
[2023-11-29 05:30:05,811 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 05:30:05,813 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1613.8) internal successors, (8069), 5 states have internal predecessors, (8069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8940
[2023-11-29 05:30:05,819 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 05:30:05,837 INFO  L225             Difference]: With dead ends: 46890
[2023-11-29 05:30:05,837 INFO  L226             Difference]: Without dead ends: 24945
[2023-11-29 05:30:05,846 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17879 GetRequests, 17870 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 05:30:05,846 INFO  L413           NwaCegarLoop]: 31781 mSDtfsCounter, 34712 mSDsluCounter, 48144 mSDsCounter, 0 mSdLazyCounter, 22495 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34712 SdHoareTripleChecker+Valid, 79925 SdHoareTripleChecker+Invalid, 23700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 22495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time
[2023-11-29 05:30:05,846 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34712 Valid, 79925 Invalid, 23700 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 22495 Invalid, 0 Unknown, 0 Unchecked, 15.9s Time]
[2023-11-29 05:30:05,866 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24945 states.
[2023-11-29 05:30:05,978 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24945 to 13431.
[2023-11-29 05:30:05,989 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13431 states, 13430 states have (on average 1.6650037230081907) internal successors, (22361), 13430 states have internal predecessors, (22361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:30:06,004 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13431 states to 13431 states and 22361 transitions.
[2023-11-29 05:30:06,004 INFO  L78                 Accepts]: Start accepts. Automaton has 13431 states and 22361 transitions. Word has length 8940
[2023-11-29 05:30:06,008 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 05:30:06,009 INFO  L495      AbstractCegarLoop]: Abstraction has 13431 states and 22361 transitions.
[2023-11-29 05:30:06,010 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1613.8) internal successors, (8069), 5 states have internal predecessors, (8069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:30:06,010 INFO  L276                IsEmpty]: Start isEmpty. Operand 13431 states and 22361 transitions.
[2023-11-29 05:30:06,314 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8942
[2023-11-29 05:30:06,315 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 05:30:06,316 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 05:30:06,427 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0
[2023-11-29 05:30:06,516 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17
[2023-11-29 05:30:06,517 INFO  L420      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 05:30:06,517 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 05:30:06,518 INFO  L85        PathProgramCache]: Analyzing trace with hash -239336880, now seen corresponding path program 1 times
[2023-11-29 05:30:06,518 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 05:30:06,518 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407964095]
[2023-11-29 05:30:06,519 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:30:06,519 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 05:30:07,306 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 05:30:07,306 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877895210]
[2023-11-29 05:30:07,307 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:30:07,307 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:30:07,307 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 05:30:07,308 INFO  L229       MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 05:30:07,309 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process
[2023-11-29 05:30:18,723 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 05:30:19,005 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44718 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 05:30:19,103 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 05:30:20,076 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 34 proven. 671 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked.
[2023-11-29 05:30:20,076 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 05:30:20,249 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked.
[2023-11-29 05:30:20,249 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 05:30:20,249 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407964095]
[2023-11-29 05:30:20,249 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 05:30:20,249 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877895210]
[2023-11-29 05:30:20,249 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [877895210] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 05:30:20,249 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 05:30:20,254 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 05:30:20,255 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692605389]
[2023-11-29 05:30:20,255 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 05:30:20,258 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 05:30:20,258 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 05:30:20,262 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 05:30:20,262 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 05:30:20,264 INFO  L87              Difference]: Start difference. First operand 13431 states and 22361 transitions. Second operand  has 5 states, 5 states have (on average 1614.4) internal successors, (8072), 5 states have internal predecessors, (8072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:30:34,896 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 05:30:34,896 INFO  L93              Difference]: Finished difference Result 46898 states and 77671 transitions.
[2023-11-29 05:30:34,896 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 05:30:34,897 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1614.4) internal successors, (8072), 5 states have internal predecessors, (8072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8941
[2023-11-29 05:30:34,903 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 05:30:34,923 INFO  L225             Difference]: With dead ends: 46898
[2023-11-29 05:30:34,923 INFO  L226             Difference]: Without dead ends: 24946
[2023-11-29 05:30:34,935 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17881 GetRequests, 17872 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 05:30:34,936 INFO  L413           NwaCegarLoop]: 31773 mSDtfsCounter, 50266 mSDsluCounter, 31577 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50266 SdHoareTripleChecker+Valid, 63350 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time
[2023-11-29 05:30:34,936 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50266 Valid, 63350 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 13.9s Time]
[2023-11-29 05:30:34,957 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24946 states.
[2023-11-29 05:30:35,080 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24946 to 13433.
[2023-11-29 05:30:35,091 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13433 states, 13432 states have (on average 1.6649047051816557) internal successors, (22363), 13432 states have internal predecessors, (22363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:30:35,107 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13433 states to 13433 states and 22363 transitions.
[2023-11-29 05:30:35,107 INFO  L78                 Accepts]: Start accepts. Automaton has 13433 states and 22363 transitions. Word has length 8941
[2023-11-29 05:30:35,111 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 05:30:35,111 INFO  L495      AbstractCegarLoop]: Abstraction has 13433 states and 22363 transitions.
[2023-11-29 05:30:35,113 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1614.4) internal successors, (8072), 5 states have internal predecessors, (8072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:30:35,113 INFO  L276                IsEmpty]: Start isEmpty. Operand 13433 states and 22363 transitions.
[2023-11-29 05:30:35,497 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8943
[2023-11-29 05:30:35,497 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 05:30:35,498 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 05:30:35,609 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0
[2023-11-29 05:30:35,699 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:30:35,699 INFO  L420      AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 05:30:35,700 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 05:30:35,701 INFO  L85        PathProgramCache]: Analyzing trace with hash -650426336, now seen corresponding path program 1 times
[2023-11-29 05:30:35,701 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 05:30:35,702 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503978603]
[2023-11-29 05:30:35,703 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:30:35,703 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 05:30:36,463 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 05:30:36,463 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1250308594]
[2023-11-29 05:30:36,465 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:30:36,465 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:30:36,465 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 05:30:36,466 INFO  L229       MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 05:30:36,467 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process
[2023-11-29 05:30:47,792 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 05:30:48,072 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44721 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 05:30:48,170 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 05:30:49,146 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 36 proven. 671 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked.
[2023-11-29 05:30:49,146 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 05:30:49,566 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 868 trivial. 0 not checked.
[2023-11-29 05:30:49,566 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 05:30:49,566 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503978603]
[2023-11-29 05:30:49,566 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 05:30:49,566 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250308594]
[2023-11-29 05:30:49,566 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250308594] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 05:30:49,566 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 05:30:49,572 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 05:30:49,572 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150063322]
[2023-11-29 05:30:49,572 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 05:30:49,576 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 05:30:49,576 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 05:30:49,579 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 05:30:49,579 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 05:30:49,581 INFO  L87              Difference]: Start difference. First operand 13433 states and 22363 transitions. Second operand  has 5 states, 5 states have (on average 1615.0) internal successors, (8075), 5 states have internal predecessors, (8075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:31:05,793 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 05:31:05,793 INFO  L93              Difference]: Finished difference Result 46906 states and 77679 transitions.
[2023-11-29 05:31:05,793 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 05:31:05,795 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1615.0) internal successors, (8075), 5 states have internal predecessors, (8075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8942
[2023-11-29 05:31:05,802 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 05:31:05,821 INFO  L225             Difference]: With dead ends: 46906
[2023-11-29 05:31:05,821 INFO  L226             Difference]: Without dead ends: 24947
[2023-11-29 05:31:05,834 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17883 GetRequests, 17874 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 05:31:05,834 INFO  L413           NwaCegarLoop]: 31765 mSDtfsCounter, 34700 mSDsluCounter, 48124 mSDsCounter, 0 mSdLazyCounter, 22495 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34700 SdHoareTripleChecker+Valid, 79889 SdHoareTripleChecker+Invalid, 23700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 22495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time
[2023-11-29 05:31:05,835 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34700 Valid, 79889 Invalid, 23700 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 22495 Invalid, 0 Unknown, 0 Unchecked, 15.4s Time]
[2023-11-29 05:31:05,856 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24947 states.
[2023-11-29 05:31:05,983 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24947 to 13435.
[2023-11-29 05:31:05,994 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13435 states, 13434 states have (on average 1.664805716837874) internal successors, (22365), 13434 states have internal predecessors, (22365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:31:06,010 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13435 states to 13435 states and 22365 transitions.
[2023-11-29 05:31:06,010 INFO  L78                 Accepts]: Start accepts. Automaton has 13435 states and 22365 transitions. Word has length 8942
[2023-11-29 05:31:06,015 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 05:31:06,015 INFO  L495      AbstractCegarLoop]: Abstraction has 13435 states and 22365 transitions.
[2023-11-29 05:31:06,017 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1615.0) internal successors, (8075), 5 states have internal predecessors, (8075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:31:06,017 INFO  L276                IsEmpty]: Start isEmpty. Operand 13435 states and 22365 transitions.
[2023-11-29 05:31:06,453 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8944
[2023-11-29 05:31:06,453 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 05:31:06,455 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 05:31:06,568 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0
[2023-11-29 05:31:06,655 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:31:06,656 INFO  L420      AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 05:31:06,657 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 05:31:06,658 INFO  L85        PathProgramCache]: Analyzing trace with hash -99541910, now seen corresponding path program 1 times
[2023-11-29 05:31:06,658 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 05:31:06,658 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580856413]
[2023-11-29 05:31:06,659 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:31:06,659 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 05:31:07,422 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 05:31:07,422 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [107057196]
[2023-11-29 05:31:07,424 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:31:07,424 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:31:07,424 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 05:31:07,425 INFO  L229       MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 05:31:07,425 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process
[2023-11-29 05:31:18,874 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 05:31:19,156 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44724 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 05:31:19,258 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 05:31:20,457 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 38 proven. 671 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked.
[2023-11-29 05:31:20,457 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 05:31:20,629 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked.
[2023-11-29 05:31:20,629 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 05:31:20,629 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580856413]
[2023-11-29 05:31:20,629 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 05:31:20,629 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107057196]
[2023-11-29 05:31:20,629 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [107057196] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 05:31:20,629 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 05:31:20,634 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 05:31:20,634 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642419103]
[2023-11-29 05:31:20,634 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 05:31:20,638 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 05:31:20,638 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 05:31:20,641 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 05:31:20,641 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 05:31:20,642 INFO  L87              Difference]: Start difference. First operand 13435 states and 22365 transitions. Second operand  has 5 states, 5 states have (on average 1615.6) internal successors, (8078), 5 states have internal predecessors, (8078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:31:35,323 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 05:31:35,323 INFO  L93              Difference]: Finished difference Result 46914 states and 77687 transitions.
[2023-11-29 05:31:35,324 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 05:31:35,325 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1615.6) internal successors, (8078), 5 states have internal predecessors, (8078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8943
[2023-11-29 05:31:35,331 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 05:31:35,346 INFO  L225             Difference]: With dead ends: 46914
[2023-11-29 05:31:35,346 INFO  L226             Difference]: Without dead ends: 24948
[2023-11-29 05:31:35,352 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17885 GetRequests, 17876 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 05:31:35,353 INFO  L413           NwaCegarLoop]: 31757 mSDtfsCounter, 50250 mSDsluCounter, 31567 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50250 SdHoareTripleChecker+Valid, 63324 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time
[2023-11-29 05:31:35,353 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50250 Valid, 63324 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 13.9s Time]
[2023-11-29 05:31:35,371 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24948 states.
[2023-11-29 05:31:35,482 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24948 to 13437.
[2023-11-29 05:31:35,493 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13437 states, 13436 states have (on average 1.6647067579636796) internal successors, (22367), 13436 states have internal predecessors, (22367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:31:35,508 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13437 states to 13437 states and 22367 transitions.
[2023-11-29 05:31:35,508 INFO  L78                 Accepts]: Start accepts. Automaton has 13437 states and 22367 transitions. Word has length 8943
[2023-11-29 05:31:35,513 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 05:31:35,513 INFO  L495      AbstractCegarLoop]: Abstraction has 13437 states and 22367 transitions.
[2023-11-29 05:31:35,514 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1615.6) internal successors, (8078), 5 states have internal predecessors, (8078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:31:35,514 INFO  L276                IsEmpty]: Start isEmpty. Operand 13437 states and 22367 transitions.
[2023-11-29 05:31:35,819 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8945
[2023-11-29 05:31:35,819 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 05:31:35,821 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 05:31:35,934 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0
[2023-11-29 05:31:36,021 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:31:36,022 INFO  L420      AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 05:31:36,022 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 05:31:36,024 INFO  L85        PathProgramCache]: Analyzing trace with hash 532235014, now seen corresponding path program 1 times
[2023-11-29 05:31:36,024 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 05:31:36,024 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415982430]
[2023-11-29 05:31:36,025 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:31:36,025 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 05:31:36,782 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 05:31:36,782 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1853444478]
[2023-11-29 05:31:36,783 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:31:36,783 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:31:36,784 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 05:31:36,784 INFO  L229       MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 05:31:36,785 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process
[2023-11-29 05:31:48,227 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 05:31:48,505 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44727 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 05:31:48,607 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 05:31:49,601 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 40 proven. 671 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked.
[2023-11-29 05:31:49,601 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 05:31:49,778 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 864 trivial. 0 not checked.
[2023-11-29 05:31:49,778 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 05:31:49,778 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415982430]
[2023-11-29 05:31:49,778 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 05:31:49,778 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853444478]
[2023-11-29 05:31:49,779 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853444478] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 05:31:49,779 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 05:31:49,783 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 05:31:49,783 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461967627]
[2023-11-29 05:31:49,783 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 05:31:49,787 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 05:31:49,787 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 05:31:49,790 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 05:31:49,790 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 05:31:49,792 INFO  L87              Difference]: Start difference. First operand 13437 states and 22367 transitions. Second operand  has 5 states, 5 states have (on average 1616.2) internal successors, (8081), 5 states have internal predecessors, (8081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:32:04,319 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 05:32:04,319 INFO  L93              Difference]: Finished difference Result 46922 states and 77695 transitions.
[2023-11-29 05:32:04,319 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 05:32:04,321 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1616.2) internal successors, (8081), 5 states have internal predecessors, (8081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8944
[2023-11-29 05:32:04,327 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 05:32:04,345 INFO  L225             Difference]: With dead ends: 46922
[2023-11-29 05:32:04,345 INFO  L226             Difference]: Without dead ends: 24949
[2023-11-29 05:32:04,355 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17887 GetRequests, 17878 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 05:32:04,356 INFO  L413           NwaCegarLoop]: 31749 mSDtfsCounter, 50242 mSDsluCounter, 31562 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50242 SdHoareTripleChecker+Valid, 63311 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time
[2023-11-29 05:32:04,356 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50242 Valid, 63311 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 13.8s Time]
[2023-11-29 05:32:04,378 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24949 states.
[2023-11-29 05:32:04,497 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24949 to 13439.
[2023-11-29 05:32:04,508 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13439 states, 13438 states have (on average 1.6646078285459145) internal successors, (22369), 13438 states have internal predecessors, (22369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:32:04,524 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13439 states to 13439 states and 22369 transitions.
[2023-11-29 05:32:04,524 INFO  L78                 Accepts]: Start accepts. Automaton has 13439 states and 22369 transitions. Word has length 8944
[2023-11-29 05:32:04,529 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 05:32:04,529 INFO  L495      AbstractCegarLoop]: Abstraction has 13439 states and 22369 transitions.
[2023-11-29 05:32:04,530 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1616.2) internal successors, (8081), 5 states have internal predecessors, (8081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:32:04,530 INFO  L276                IsEmpty]: Start isEmpty. Operand 13439 states and 22369 transitions.
[2023-11-29 05:32:04,835 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8946
[2023-11-29 05:32:04,835 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 05:32:04,837 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 05:32:04,948 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0
[2023-11-29 05:32:05,037 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:32:05,038 INFO  L420      AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 05:32:05,038 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 05:32:05,039 INFO  L85        PathProgramCache]: Analyzing trace with hash -251161210, now seen corresponding path program 1 times
[2023-11-29 05:32:05,039 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 05:32:05,039 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074022125]
[2023-11-29 05:32:05,040 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:32:05,040 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 05:32:05,848 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 05:32:05,848 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1574381502]
[2023-11-29 05:32:05,849 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:32:05,849 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:32:05,850 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 05:32:05,850 INFO  L229       MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 05:32:05,851 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process
[2023-11-29 05:32:17,347 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 05:32:17,627 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44731 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 05:32:17,725 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 05:32:18,696 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 42 proven. 671 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked.
[2023-11-29 05:32:18,696 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 05:32:18,880 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked.
[2023-11-29 05:32:18,880 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 05:32:18,880 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074022125]
[2023-11-29 05:32:18,880 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 05:32:18,880 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574381502]
[2023-11-29 05:32:18,881 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574381502] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 05:32:18,881 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 05:32:18,885 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 05:32:18,885 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468168061]
[2023-11-29 05:32:18,885 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 05:32:18,889 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 05:32:18,889 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 05:32:18,892 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 05:32:18,892 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 05:32:18,894 INFO  L87              Difference]: Start difference. First operand 13439 states and 22369 transitions. Second operand  has 5 states, 5 states have (on average 1616.8) internal successors, (8084), 5 states have internal predecessors, (8084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:32:34,720 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 05:32:34,720 INFO  L93              Difference]: Finished difference Result 46930 states and 77703 transitions.
[2023-11-29 05:32:34,720 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 05:32:34,722 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1616.8) internal successors, (8084), 5 states have internal predecessors, (8084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8945
[2023-11-29 05:32:34,728 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 05:32:34,746 INFO  L225             Difference]: With dead ends: 46930
[2023-11-29 05:32:34,746 INFO  L226             Difference]: Without dead ends: 24950
[2023-11-29 05:32:34,757 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17889 GetRequests, 17880 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 05:32:34,757 INFO  L413           NwaCegarLoop]: 31741 mSDtfsCounter, 34701 mSDsluCounter, 45882 mSDsCounter, 0 mSdLazyCounter, 21619 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34701 SdHoareTripleChecker+Valid, 77623 SdHoareTripleChecker+Invalid, 22824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 21619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time
[2023-11-29 05:32:34,757 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34701 Valid, 77623 Invalid, 22824 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 21619 Invalid, 0 Unknown, 0 Unchecked, 15.0s Time]
[2023-11-29 05:32:34,778 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24950 states.
[2023-11-29 05:32:34,896 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24950 to 13441.
[2023-11-29 05:32:34,907 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13441 states, 13440 states have (on average 1.6645089285714285) internal successors, (22371), 13440 states have internal predecessors, (22371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:32:34,922 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13441 states to 13441 states and 22371 transitions.
[2023-11-29 05:32:34,923 INFO  L78                 Accepts]: Start accepts. Automaton has 13441 states and 22371 transitions. Word has length 8945
[2023-11-29 05:32:34,927 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 05:32:34,927 INFO  L495      AbstractCegarLoop]: Abstraction has 13441 states and 22371 transitions.
[2023-11-29 05:32:34,928 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1616.8) internal successors, (8084), 5 states have internal predecessors, (8084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:32:34,928 INFO  L276                IsEmpty]: Start isEmpty. Operand 13441 states and 22371 transitions.
[2023-11-29 05:32:35,233 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8947
[2023-11-29 05:32:35,233 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 05:32:35,235 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 05:32:35,346 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0
[2023-11-29 05:32:35,435 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:32:35,436 INFO  L420      AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 05:32:35,436 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 05:32:35,437 INFO  L85        PathProgramCache]: Analyzing trace with hash 469487854, now seen corresponding path program 1 times
[2023-11-29 05:32:35,437 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 05:32:35,437 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093850422]
[2023-11-29 05:32:35,439 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:32:35,439 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 05:32:36,286 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 05:32:36,286 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [363739135]
[2023-11-29 05:32:36,288 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:32:36,288 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:32:36,288 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 05:32:36,289 INFO  L229       MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 05:32:36,291 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process
[2023-11-29 05:32:47,897 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 05:32:48,176 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44734 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 05:32:48,274 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 05:32:49,321 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 44 proven. 671 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked.
[2023-11-29 05:32:49,321 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 05:32:49,522 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked.
[2023-11-29 05:32:49,522 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 05:32:49,522 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093850422]
[2023-11-29 05:32:49,522 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 05:32:49,522 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363739135]
[2023-11-29 05:32:49,522 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [363739135] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 05:32:49,522 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 05:32:49,528 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 05:32:49,528 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779684596]
[2023-11-29 05:32:49,528 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 05:32:49,532 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 05:32:49,532 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 05:32:49,535 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 05:32:49,535 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 05:32:49,537 INFO  L87              Difference]: Start difference. First operand 13441 states and 22371 transitions. Second operand  has 5 states, 5 states have (on average 1617.4) internal successors, (8087), 5 states have internal predecessors, (8087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:33:05,742 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 05:33:05,742 INFO  L93              Difference]: Finished difference Result 46938 states and 77711 transitions.
[2023-11-29 05:33:05,743 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 05:33:05,744 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1617.4) internal successors, (8087), 5 states have internal predecessors, (8087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8946
[2023-11-29 05:33:05,749 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 05:33:05,766 INFO  L225             Difference]: With dead ends: 46938
[2023-11-29 05:33:05,766 INFO  L226             Difference]: Without dead ends: 24951
[2023-11-29 05:33:05,775 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17891 GetRequests, 17882 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 05:33:05,776 INFO  L413           NwaCegarLoop]: 31733 mSDtfsCounter, 34696 mSDsluCounter, 45874 mSDsCounter, 0 mSdLazyCounter, 21619 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34696 SdHoareTripleChecker+Valid, 77607 SdHoareTripleChecker+Invalid, 22824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 21619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time
[2023-11-29 05:33:05,776 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34696 Valid, 77607 Invalid, 22824 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 21619 Invalid, 0 Unknown, 0 Unchecked, 15.4s Time]
[2023-11-29 05:33:05,796 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24951 states.
[2023-11-29 05:33:05,914 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24951 to 13443.
[2023-11-29 05:33:05,925 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13443 states, 13442 states have (on average 1.6644100580270793) internal successors, (22373), 13442 states have internal predecessors, (22373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:33:05,940 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13443 states to 13443 states and 22373 transitions.
[2023-11-29 05:33:05,940 INFO  L78                 Accepts]: Start accepts. Automaton has 13443 states and 22373 transitions. Word has length 8946
[2023-11-29 05:33:05,944 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 05:33:05,945 INFO  L495      AbstractCegarLoop]: Abstraction has 13443 states and 22373 transitions.
[2023-11-29 05:33:05,946 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1617.4) internal successors, (8087), 5 states have internal predecessors, (8087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:33:05,946 INFO  L276                IsEmpty]: Start isEmpty. Operand 13443 states and 22373 transitions.
[2023-11-29 05:33:06,251 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8948
[2023-11-29 05:33:06,251 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 05:33:06,253 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 05:33:06,364 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0
[2023-11-29 05:33:06,453 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23
[2023-11-29 05:33:06,454 INFO  L420      AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 05:33:06,454 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 05:33:06,455 INFO  L85        PathProgramCache]: Analyzing trace with hash -2118513760, now seen corresponding path program 1 times
[2023-11-29 05:33:06,455 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 05:33:06,455 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459009821]
[2023-11-29 05:33:06,456 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:33:06,456 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 05:33:07,213 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 05:33:07,213 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8989284]
[2023-11-29 05:33:07,214 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:33:07,214 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:33:07,214 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 05:33:07,215 INFO  L229       MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 05:33:07,216 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process
[2023-11-29 05:33:18,920 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 05:33:19,201 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44737 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 05:33:19,299 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 05:33:20,294 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 46 proven. 671 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked.
[2023-11-29 05:33:20,294 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 05:33:20,493 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked.
[2023-11-29 05:33:20,493 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 05:33:20,493 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459009821]
[2023-11-29 05:33:20,493 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 05:33:20,493 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8989284]
[2023-11-29 05:33:20,494 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [8989284] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 05:33:20,494 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 05:33:20,498 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 05:33:20,498 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196825809]
[2023-11-29 05:33:20,498 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 05:33:20,502 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 05:33:20,502 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 05:33:20,505 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 05:33:20,505 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 05:33:20,507 INFO  L87              Difference]: Start difference. First operand 13443 states and 22373 transitions. Second operand  has 5 states, 5 states have (on average 1618.0) internal successors, (8090), 5 states have internal predecessors, (8090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:33:35,242 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 05:33:35,242 INFO  L93              Difference]: Finished difference Result 46946 states and 77719 transitions.
[2023-11-29 05:33:35,242 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 05:33:35,244 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1618.0) internal successors, (8090), 5 states have internal predecessors, (8090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8947
[2023-11-29 05:33:35,249 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 05:33:35,268 INFO  L225             Difference]: With dead ends: 46946
[2023-11-29 05:33:35,268 INFO  L226             Difference]: Without dead ends: 24952
[2023-11-29 05:33:35,279 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17893 GetRequests, 17884 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 05:33:35,279 INFO  L413           NwaCegarLoop]: 31725 mSDtfsCounter, 50218 mSDsluCounter, 31547 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50218 SdHoareTripleChecker+Valid, 63272 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time
[2023-11-29 05:33:35,280 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50218 Valid, 63272 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 14.0s Time]
[2023-11-29 05:33:35,302 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24952 states.
[2023-11-29 05:33:35,424 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24952 to 13445.
[2023-11-29 05:33:35,435 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13445 states, 13444 states have (on average 1.6643112168997323) internal successors, (22375), 13444 states have internal predecessors, (22375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:33:35,451 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13445 states to 13445 states and 22375 transitions.
[2023-11-29 05:33:35,451 INFO  L78                 Accepts]: Start accepts. Automaton has 13445 states and 22375 transitions. Word has length 8947
[2023-11-29 05:33:35,455 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 05:33:35,455 INFO  L495      AbstractCegarLoop]: Abstraction has 13445 states and 22375 transitions.
[2023-11-29 05:33:35,457 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1618.0) internal successors, (8090), 5 states have internal predecessors, (8090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:33:35,457 INFO  L276                IsEmpty]: Start isEmpty. Operand 13445 states and 22375 transitions.
[2023-11-29 05:33:35,762 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8949
[2023-11-29 05:33:35,762 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 05:33:35,763 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 05:33:35,875 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0
[2023-11-29 05:33:35,964 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24
[2023-11-29 05:33:35,964 INFO  L420      AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 05:33:35,964 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 05:33:35,965 INFO  L85        PathProgramCache]: Analyzing trace with hash -237285420, now seen corresponding path program 1 times
[2023-11-29 05:33:35,965 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 05:33:35,965 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183387847]
[2023-11-29 05:33:35,967 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:33:35,967 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 05:33:36,724 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 05:33:36,724 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [356932671]
[2023-11-29 05:33:36,726 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:33:36,726 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:33:36,726 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 05:33:36,727 INFO  L229       MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 05:33:36,727 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3f21-170a-410c-8bdd-6eab2807780e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process
[2023-11-29 05:33:48,294 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 05:33:48,576 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44740 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 05:33:48,676 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 05:33:49,629 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 48 proven. 671 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked.
[2023-11-29 05:33:49,629 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 05:33:49,818 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 856 trivial. 0 not checked.
[2023-11-29 05:33:49,818 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 05:33:49,818 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183387847]
[2023-11-29 05:33:49,818 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 05:33:49,819 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356932671]
[2023-11-29 05:33:49,819 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [356932671] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 05:33:49,819 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 05:33:49,825 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 05:33:49,825 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566714022]
[2023-11-29 05:33:49,825 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 05:33:49,828 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 05:33:49,829 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 05:33:49,832 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 05:33:49,832 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 05:33:49,834 INFO  L87              Difference]: Start difference. First operand 13445 states and 22375 transitions. Second operand  has 5 states, 5 states have (on average 1618.6) internal successors, (8093), 5 states have internal predecessors, (8093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)